| 2 |
- |
1 |
/* pnggccrd.c - mixed C/assembler version of utilities to read a PNG file
|
|
|
2 |
*
|
|
|
3 |
* For Intel x86 CPU (Pentium-MMX or later) and GNU C compiler.
|
|
|
4 |
*
|
|
|
5 |
* See http://www.intel.com/drg/pentiumII/appnotes/916/916.htm
|
|
|
6 |
* and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm
|
|
|
7 |
* for Intel's performance analysis of the MMX vs. non-MMX code.
|
|
|
8 |
*
|
|
|
9 |
* libpng version 1.2.8 - December 3, 2004
|
|
|
10 |
* For conditions of distribution and use, see copyright notice in png.h
|
|
|
11 |
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
|
|
|
12 |
* Copyright (c) 1998, Intel Corporation
|
|
|
13 |
*
|
|
|
14 |
* Based on MSVC code contributed by Nirav Chhatrapati, Intel Corp., 1998.
|
|
|
15 |
* Interface to libpng contributed by Gilles Vollant, 1999.
|
|
|
16 |
* GNU C port by Greg Roelofs, 1999-2001.
|
|
|
17 |
*
|
|
|
18 |
* Lines 2350-4300 converted in place with intel2gas 1.3.1:
|
|
|
19 |
*
|
|
|
20 |
* intel2gas -mdI pnggccrd.c.partially-msvc -o pnggccrd.c
|
|
|
21 |
*
|
|
|
22 |
* and then cleaned up by hand. See http://hermes.terminal.at/intel2gas/ .
|
|
|
23 |
*
|
|
|
24 |
* NOTE: A sufficiently recent version of GNU as (or as.exe under DOS/Windows)
|
|
|
25 |
* is required to assemble the newer MMX instructions such as movq.
|
|
|
26 |
* For djgpp, see
|
|
|
27 |
*
|
|
|
28 |
* ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bnu281b.zip
|
|
|
29 |
*
|
|
|
30 |
* (or a later version in the same directory). For Linux, check your
|
|
|
31 |
* distribution's web site(s) or try these links:
|
|
|
32 |
*
|
|
|
33 |
* http://rufus.w3.org/linux/RPM/binutils.html
|
|
|
34 |
* http://www.debian.org/Packages/stable/devel/binutils.html
|
|
|
35 |
* ftp://ftp.slackware.com/pub/linux/slackware/slackware/slakware/d1/
|
|
|
36 |
* binutils.tgz
|
|
|
37 |
*
|
|
|
38 |
* For other platforms, see the main GNU site:
|
|
|
39 |
*
|
|
|
40 |
* ftp://ftp.gnu.org/pub/gnu/binutils/
|
|
|
41 |
*
|
|
|
42 |
* Version 2.5.2l.15 is definitely too old...
|
|
|
43 |
*/
|
|
|
44 |
|
|
|
45 |
/*
|
|
|
46 |
* TEMPORARY PORTING NOTES AND CHANGELOG (mostly by Greg Roelofs)
|
|
|
47 |
* =====================================
|
|
|
48 |
*
|
|
|
49 |
* 19991006:
|
|
|
50 |
* - fixed sign error in post-MMX cleanup code (16- & 32-bit cases)
|
|
|
51 |
*
|
|
|
52 |
* 19991007:
|
|
|
53 |
* - additional optimizations (possible or definite):
|
|
|
54 |
* x [DONE] write MMX code for 64-bit case (pixel_bytes == 8) [not tested]
|
|
|
55 |
* - write MMX code for 48-bit case (pixel_bytes == 6)
|
|
|
56 |
* - figure out what's up with 24-bit case (pixel_bytes == 3):
|
|
|
57 |
* why subtract 8 from width_mmx in the pass 4/5 case?
|
|
|
58 |
* (only width_mmx case) (near line 1606)
|
|
|
59 |
* x [DONE] replace pixel_bytes within each block with the true
|
|
|
60 |
* constant value (or are compilers smart enough to do that?)
|
|
|
61 |
* - rewrite all MMX interlacing code so it's aligned with
|
|
|
62 |
* the *beginning* of the row buffer, not the end. This
|
|
|
63 |
* would not only allow one to eliminate half of the memory
|
|
|
64 |
* writes for odd passes (that is, pass == odd), it may also
|
|
|
65 |
* eliminate some unaligned-data-access exceptions (assuming
|
|
|
66 |
* there's a penalty for not aligning 64-bit accesses on
|
|
|
67 |
* 64-bit boundaries). The only catch is that the "leftover"
|
|
|
68 |
* pixel(s) at the end of the row would have to be saved,
|
|
|
69 |
* but there are enough unused MMX registers in every case,
|
|
|
70 |
* so this is not a problem. A further benefit is that the
|
|
|
71 |
* post-MMX cleanup code (C code) in at least some of the
|
|
|
72 |
* cases could be done within the assembler block.
|
|
|
73 |
* x [DONE] the "v3 v2 v1 v0 v7 v6 v5 v4" comments are confusing,
|
|
|
74 |
* inconsistent, and don't match the MMX Programmer's Reference
|
|
|
75 |
* Manual conventions anyway. They should be changed to
|
|
|
76 |
* "b7 b6 b5 b4 b3 b2 b1 b0," where b0 indicates the byte that
|
|
|
77 |
* was lowest in memory (e.g., corresponding to a left pixel)
|
|
|
78 |
* and b7 is the byte that was highest (e.g., a right pixel).
|
|
|
79 |
*
|
|
|
80 |
* 19991016:
|
|
|
81 |
* - Brennan's Guide notwithstanding, gcc under Linux does *not*
|
|
|
82 |
* want globals prefixed by underscores when referencing them--
|
|
|
83 |
* i.e., if the variable is const4, then refer to it as const4,
|
|
|
84 |
* not _const4. This seems to be a djgpp-specific requirement.
|
|
|
85 |
* Also, such variables apparently *must* be declared outside
|
|
|
86 |
* of functions; neither static nor automatic variables work if
|
|
|
87 |
* defined within the scope of a single function, but both
|
|
|
88 |
* static and truly global (multi-module) variables work fine.
|
|
|
89 |
*
|
|
|
90 |
* 19991023:
|
|
|
91 |
* - fixed png_combine_row() non-MMX replication bug (odd passes only?)
|
|
|
92 |
* - switched from string-concatenation-with-macros to cleaner method of
|
|
|
93 |
* renaming global variables for djgpp--i.e., always use prefixes in
|
|
|
94 |
* inlined assembler code (== strings) and conditionally rename the
|
|
|
95 |
* variables, not the other way around. Hence _const4, _mask8_0, etc.
|
|
|
96 |
*
|
|
|
97 |
* 19991024:
|
|
|
98 |
* - fixed mmxsupport()/png_do_read_interlace() first-row bug
|
|
|
99 |
* This one was severely weird: even though mmxsupport() doesn't touch
|
|
|
100 |
* ebx (where "row" pointer was stored), it nevertheless managed to zero
|
|
|
101 |
* the register (even in static/non-fPIC code--see below), which in turn
|
|
|
102 |
* caused png_do_read_interlace() to return prematurely on the first row of
|
|
|
103 |
* interlaced images (i.e., without expanding the interlaced pixels).
|
|
|
104 |
* Inspection of the generated assembly code didn't turn up any clues,
|
|
|
105 |
* although it did point at a minor optimization (i.e., get rid of
|
|
|
106 |
* mmx_supported_local variable and just use eax). Possibly the CPUID
|
|
|
107 |
* instruction is more destructive than it looks? (Not yet checked.)
|
|
|
108 |
* - "info gcc" was next to useless, so compared fPIC and non-fPIC assembly
|
|
|
109 |
* listings... Apparently register spillage has to do with ebx, since
|
|
|
110 |
* it's used to index the global offset table. Commenting it out of the
|
|
|
111 |
* input-reg lists in png_combine_row() eliminated compiler barfage, so
|
|
|
112 |
* ifdef'd with __PIC__ macro: if defined, use a global for unmask
|
|
|
113 |
*
|
|
|
114 |
* 19991107:
|
|
|
115 |
* - verified CPUID clobberage: 12-char string constant ("GenuineIntel",
|
|
|
116 |
* "AuthenticAMD", etc.) placed in ebx:ecx:edx. Still need to polish.
|
|
|
117 |
*
|
|
|
118 |
* 19991120:
|
|
|
119 |
* - made "diff" variable (now "_dif") global to simplify conversion of
|
|
|
120 |
* filtering routines (running out of regs, sigh). "diff" is still used
|
|
|
121 |
* in interlacing routines, however.
|
|
|
122 |
* - fixed up both versions of mmxsupport() (ORIG_THAT_USED_TO_CLOBBER_EBX
|
|
|
123 |
* macro determines which is used); original not yet tested.
|
|
|
124 |
*
|
|
|
125 |
* 20000213:
|
|
|
126 |
* - when compiling with gcc, be sure to use -fomit-frame-pointer
|
|
|
127 |
*
|
|
|
128 |
* 20000319:
|
|
|
129 |
* - fixed a register-name typo in png_do_read_interlace(), default (MMX) case,
|
|
|
130 |
* pass == 4 or 5, that caused visible corruption of interlaced images
|
|
|
131 |
*
|
|
|
132 |
* 20000623:
|
|
|
133 |
* - Various problems were reported with gcc 2.95.2 in the Cygwin environment,
|
|
|
134 |
* many of the form "forbidden register 0 (ax) was spilled for class AREG."
|
|
|
135 |
* This is explained at http://gcc.gnu.org/fom_serv/cache/23.html, and
|
|
|
136 |
* Chuck Wilson supplied a patch involving dummy output registers. See
|
|
|
137 |
* http://sourceforge.net/bugs/?func=detailbug&bug_id=108741&group_id=5624
|
|
|
138 |
* for the original (anonymous) SourceForge bug report.
|
|
|
139 |
*
|
|
|
140 |
* 20000706:
|
|
|
141 |
* - Chuck Wilson passed along these remaining gcc 2.95.2 errors:
|
|
|
142 |
* pnggccrd.c: In function `png_combine_row':
|
|
|
143 |
* pnggccrd.c:525: more than 10 operands in `asm'
|
|
|
144 |
* pnggccrd.c:669: more than 10 operands in `asm'
|
|
|
145 |
* pnggccrd.c:828: more than 10 operands in `asm'
|
|
|
146 |
* pnggccrd.c:994: more than 10 operands in `asm'
|
|
|
147 |
* pnggccrd.c:1177: more than 10 operands in `asm'
|
|
|
148 |
* They are all the same problem and can be worked around by using the
|
|
|
149 |
* global _unmask variable unconditionally, not just in the -fPIC case.
|
|
|
150 |
* Reportedly earlier versions of gcc also have the problem with more than
|
|
|
151 |
* 10 operands; they just don't report it. Much strangeness ensues, etc.
|
|
|
152 |
*
|
|
|
153 |
* 20000729:
|
|
|
154 |
* - enabled png_read_filter_row_mmx_up() (shortest remaining unconverted
|
|
|
155 |
* MMX routine); began converting png_read_filter_row_mmx_sub()
|
|
|
156 |
* - to finish remaining sections:
|
|
|
157 |
* - clean up indentation and comments
|
|
|
158 |
* - preload local variables
|
|
|
159 |
* - add output and input regs (order of former determines numerical
|
|
|
160 |
* mapping of latter)
|
|
|
161 |
* - avoid all usage of ebx (including bx, bh, bl) register [20000823]
|
|
|
162 |
* - remove "$" from addressing of Shift and Mask variables [20000823]
|
|
|
163 |
*
|
|
|
164 |
* 20000731:
|
|
|
165 |
* - global union vars causing segfaults in png_read_filter_row_mmx_sub()?
|
|
|
166 |
*
|
|
|
167 |
* 20000822:
|
|
|
168 |
* - ARGH, stupid png_read_filter_row_mmx_sub() segfault only happens with
|
|
|
169 |
* shared-library (-fPIC) version! Code works just fine as part of static
|
|
|
170 |
* library. Damn damn damn damn damn, should have tested that sooner.
|
|
|
171 |
* ebx is getting clobbered again (explicitly this time); need to save it
|
|
|
172 |
* on stack or rewrite asm code to avoid using it altogether. Blargh!
|
|
|
173 |
*
|
|
|
174 |
* 20000823:
|
|
|
175 |
* - first section was trickiest; all remaining sections have ebx -> edx now.
|
|
|
176 |
* (-fPIC works again.) Also added missing underscores to various Shift*
|
|
|
177 |
* and *Mask* globals and got rid of leading "$" signs.
|
|
|
178 |
*
|
|
|
179 |
* 20000826:
|
|
|
180 |
* - added visual separators to help navigate microscopic printed copies
|
|
|
181 |
* (http://pobox.com/~newt/code/gpr-latest.zip, mode 10); started working
|
|
|
182 |
* on png_read_filter_row_mmx_avg()
|
|
|
183 |
*
|
|
|
184 |
* 20000828:
|
|
|
185 |
* - finished png_read_filter_row_mmx_avg(): only Paeth left! (930 lines...)
|
|
|
186 |
* What the hell, did png_read_filter_row_mmx_paeth(), too. Comments not
|
|
|
187 |
* cleaned up/shortened in either routine, but functionality is complete
|
|
|
188 |
* and seems to be working fine.
|
|
|
189 |
*
|
|
|
190 |
* 20000829:
|
|
|
191 |
* - ahhh, figured out last(?) bit of gcc/gas asm-fu: if register is listed
|
|
|
192 |
* as an input reg (with dummy output variables, etc.), then it *cannot*
|
|
|
193 |
* also appear in the clobber list or gcc 2.95.2 will barf. The solution
|
|
|
194 |
* is simple enough...
|
|
|
195 |
*
|
|
|
196 |
* 20000914:
|
|
|
197 |
* - bug in png_read_filter_row_mmx_avg(): 16-bit grayscale not handled
|
|
|
198 |
* correctly (but 48-bit RGB just fine)
|
|
|
199 |
*
|
|
|
200 |
* 20000916:
|
|
|
201 |
* - fixed bug in png_read_filter_row_mmx_avg(), bpp == 2 case; three errors:
|
|
|
202 |
* - "_ShiftBpp.use = 24;" should have been "_ShiftBpp.use = 16;"
|
|
|
203 |
* - "_ShiftRem.use = 40;" should have been "_ShiftRem.use = 48;"
|
|
|
204 |
* - "psllq _ShiftRem, %%mm2" should have been "psrlq _ShiftRem, %%mm2"
|
|
|
205 |
*
|
|
|
206 |
* 20010101:
|
|
|
207 |
* - added new png_init_mmx_flags() function (here only because it needs to
|
|
|
208 |
* call mmxsupport(), which should probably become global png_mmxsupport());
|
|
|
209 |
* modified other MMX routines to run conditionally (png_ptr->asm_flags)
|
|
|
210 |
*
|
|
|
211 |
* 20010103:
|
|
|
212 |
* - renamed mmxsupport() to png_mmx_support(), with auto-set of mmx_supported,
|
|
|
213 |
* and made it public; moved png_init_mmx_flags() to png.c as internal func
|
|
|
214 |
*
|
|
|
215 |
* 20010104:
|
|
|
216 |
* - removed dependency on png_read_filter_row_c() (C code already duplicated
|
|
|
217 |
* within MMX version of png_read_filter_row()) so no longer necessary to
|
|
|
218 |
* compile it into pngrutil.o
|
|
|
219 |
*
|
|
|
220 |
* 20010310:
|
|
|
221 |
* - fixed buffer-overrun bug in png_combine_row() C code (non-MMX)
|
|
|
222 |
*
|
|
|
223 |
* 20020304:
|
|
|
224 |
* - eliminated incorrect use of width_mmx in pixel_bytes == 8 case
|
|
|
225 |
*
|
|
|
226 |
* 20040724:
|
|
|
227 |
* - more tinkering with clobber list at lines 4529 and 5033, to get
|
|
|
228 |
* it to compile on gcc-3.4.
|
|
|
229 |
*
|
|
|
230 |
* STILL TO DO:
|
|
|
231 |
* - test png_do_read_interlace() 64-bit case (pixel_bytes == 8)
|
|
|
232 |
* - write MMX code for 48-bit case (pixel_bytes == 6)
|
|
|
233 |
* - figure out what's up with 24-bit case (pixel_bytes == 3):
|
|
|
234 |
* why subtract 8 from width_mmx in the pass 4/5 case?
|
|
|
235 |
* (only width_mmx case) (near line 1606)
|
|
|
236 |
* - rewrite all MMX interlacing code so it's aligned with beginning
|
|
|
237 |
* of the row buffer, not the end (see 19991007 for details)
|
|
|
238 |
* x pick one version of mmxsupport() and get rid of the other
|
|
|
239 |
* - add error messages to any remaining bogus default cases
|
|
|
240 |
* - enable pixel_depth == 8 cases in png_read_filter_row()? (test speed)
|
|
|
241 |
* x add support for runtime enable/disable/query of various MMX routines
|
|
|
242 |
*/
|
|
|
243 |
|
|
|
244 |
#define PNG_INTERNAL
|
|
|
245 |
#include "png.h"
|
|
|
246 |
|
|
|
247 |
#if defined(PNG_USE_PNGGCCRD)
|
|
|
248 |
|
|
|
249 |
int PNGAPI png_mmx_support(void);
|
|
|
250 |
|
|
|
251 |
#ifdef PNG_USE_LOCAL_ARRAYS
|
|
|
252 |
static const int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
|
|
|
253 |
static const int FARDATA png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
|
|
|
254 |
static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
|
|
|
255 |
#endif
|
|
|
256 |
|
|
|
257 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|
|
258 |
/* djgpp, Win32, and Cygwin add their own underscores to global variables,
|
|
|
259 |
* so define them without: */
|
|
|
260 |
#if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__)
|
|
|
261 |
# define _mmx_supported mmx_supported
|
|
|
262 |
# define _const4 const4
|
|
|
263 |
# define _const6 const6
|
|
|
264 |
# define _mask8_0 mask8_0
|
|
|
265 |
# define _mask16_1 mask16_1
|
|
|
266 |
# define _mask16_0 mask16_0
|
|
|
267 |
# define _mask24_2 mask24_2
|
|
|
268 |
# define _mask24_1 mask24_1
|
|
|
269 |
# define _mask24_0 mask24_0
|
|
|
270 |
# define _mask32_3 mask32_3
|
|
|
271 |
# define _mask32_2 mask32_2
|
|
|
272 |
# define _mask32_1 mask32_1
|
|
|
273 |
# define _mask32_0 mask32_0
|
|
|
274 |
# define _mask48_5 mask48_5
|
|
|
275 |
# define _mask48_4 mask48_4
|
|
|
276 |
# define _mask48_3 mask48_3
|
|
|
277 |
# define _mask48_2 mask48_2
|
|
|
278 |
# define _mask48_1 mask48_1
|
|
|
279 |
# define _mask48_0 mask48_0
|
|
|
280 |
# define _LBCarryMask LBCarryMask
|
|
|
281 |
# define _HBClearMask HBClearMask
|
|
|
282 |
# define _ActiveMask ActiveMask
|
|
|
283 |
# define _ActiveMask2 ActiveMask2
|
|
|
284 |
# define _ActiveMaskEnd ActiveMaskEnd
|
|
|
285 |
# define _ShiftBpp ShiftBpp
|
|
|
286 |
# define _ShiftRem ShiftRem
|
|
|
287 |
#ifdef PNG_THREAD_UNSAFE_OK
|
|
|
288 |
# define _unmask unmask
|
|
|
289 |
# define _FullLength FullLength
|
|
|
290 |
# define _MMXLength MMXLength
|
|
|
291 |
# define _dif dif
|
|
|
292 |
# define _patemp patemp
|
|
|
293 |
# define _pbtemp pbtemp
|
|
|
294 |
# define _pctemp pctemp
|
|
|
295 |
#endif
|
|
|
296 |
#endif
|
|
|
297 |
|
|
|
298 |
|
|
|
299 |
/* These constants are used in the inlined MMX assembly code.
|
|
|
300 |
Ignore gcc's "At top level: defined but not used" warnings. */
|
|
|
301 |
|
|
|
302 |
/* GRR 20000706: originally _unmask was needed only when compiling with -fPIC,
|
|
|
303 |
* since that case uses the %ebx register for indexing the Global Offset Table
|
|
|
304 |
* and there were no other registers available. But gcc 2.95 and later emit
|
|
|
305 |
* "more than 10 operands in `asm'" errors when %ebx is used to preload unmask
|
|
|
306 |
* in the non-PIC case, so we'll just use the global unconditionally now.
|
|
|
307 |
*/
|
|
|
308 |
#ifdef PNG_THREAD_UNSAFE_OK
|
|
|
309 |
static int _unmask;
|
|
|
310 |
#endif
|
|
|
311 |
|
|
|
312 |
static unsigned long long _mask8_0 = 0x0102040810204080LL;
|
|
|
313 |
|
|
|
314 |
static unsigned long long _mask16_1 = 0x0101020204040808LL;
|
|
|
315 |
static unsigned long long _mask16_0 = 0x1010202040408080LL;
|
|
|
316 |
|
|
|
317 |
static unsigned long long _mask24_2 = 0x0101010202020404LL;
|
|
|
318 |
static unsigned long long _mask24_1 = 0x0408080810101020LL;
|
|
|
319 |
static unsigned long long _mask24_0 = 0x2020404040808080LL;
|
|
|
320 |
|
|
|
321 |
static unsigned long long _mask32_3 = 0x0101010102020202LL;
|
|
|
322 |
static unsigned long long _mask32_2 = 0x0404040408080808LL;
|
|
|
323 |
static unsigned long long _mask32_1 = 0x1010101020202020LL;
|
|
|
324 |
static unsigned long long _mask32_0 = 0x4040404080808080LL;
|
|
|
325 |
|
|
|
326 |
static unsigned long long _mask48_5 = 0x0101010101010202LL;
|
|
|
327 |
static unsigned long long _mask48_4 = 0x0202020204040404LL;
|
|
|
328 |
static unsigned long long _mask48_3 = 0x0404080808080808LL;
|
|
|
329 |
static unsigned long long _mask48_2 = 0x1010101010102020LL;
|
|
|
330 |
static unsigned long long _mask48_1 = 0x2020202040404040LL;
|
|
|
331 |
static unsigned long long _mask48_0 = 0x4040808080808080LL;
|
|
|
332 |
|
|
|
333 |
static unsigned long long _const4 = 0x0000000000FFFFFFLL;
|
|
|
334 |
//static unsigned long long _const5 = 0x000000FFFFFF0000LL; // NOT USED
|
|
|
335 |
static unsigned long long _const6 = 0x00000000000000FFLL;
|
|
|
336 |
|
|
|
337 |
// These are used in the row-filter routines and should/would be local
|
|
|
338 |
// variables if not for gcc addressing limitations.
|
|
|
339 |
// WARNING: Their presence probably defeats the thread safety of libpng.
|
|
|
340 |
|
|
|
341 |
#ifdef PNG_THREAD_UNSAFE_OK
|
|
|
342 |
static png_uint_32 _FullLength;
|
|
|
343 |
static png_uint_32 _MMXLength;
|
|
|
344 |
static int _dif;
|
|
|
345 |
static int _patemp; // temp variables for Paeth routine
|
|
|
346 |
static int _pbtemp;
|
|
|
347 |
static int _pctemp;
|
|
|
348 |
#endif
|
|
|
349 |
|
|
|
350 |
void /* PRIVATE */
|
|
|
351 |
png_squelch_warnings(void)
|
|
|
352 |
{
|
|
|
353 |
#ifdef PNG_THREAD_UNSAFE_OK
|
|
|
354 |
_dif = _dif;
|
|
|
355 |
_patemp = _patemp;
|
|
|
356 |
_pbtemp = _pbtemp;
|
|
|
357 |
_pctemp = _pctemp;
|
|
|
358 |
_MMXLength = _MMXLength;
|
|
|
359 |
#endif
|
|
|
360 |
_const4 = _const4;
|
|
|
361 |
_const6 = _const6;
|
|
|
362 |
_mask8_0 = _mask8_0;
|
|
|
363 |
_mask16_1 = _mask16_1;
|
|
|
364 |
_mask16_0 = _mask16_0;
|
|
|
365 |
_mask24_2 = _mask24_2;
|
|
|
366 |
_mask24_1 = _mask24_1;
|
|
|
367 |
_mask24_0 = _mask24_0;
|
|
|
368 |
_mask32_3 = _mask32_3;
|
|
|
369 |
_mask32_2 = _mask32_2;
|
|
|
370 |
_mask32_1 = _mask32_1;
|
|
|
371 |
_mask32_0 = _mask32_0;
|
|
|
372 |
_mask48_5 = _mask48_5;
|
|
|
373 |
_mask48_4 = _mask48_4;
|
|
|
374 |
_mask48_3 = _mask48_3;
|
|
|
375 |
_mask48_2 = _mask48_2;
|
|
|
376 |
_mask48_1 = _mask48_1;
|
|
|
377 |
_mask48_0 = _mask48_0;
|
|
|
378 |
}
|
|
|
379 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
380 |
|
|
|
381 |
|
|
|
382 |
static int _mmx_supported = 2;
|
|
|
383 |
|
|
|
384 |
/*===========================================================================*/
|
|
|
385 |
/* */
|
|
|
386 |
/* P N G _ C O M B I N E _ R O W */
|
|
|
387 |
/* */
|
|
|
388 |
/*===========================================================================*/
|
|
|
389 |
|
|
|
390 |
#if defined(PNG_HAVE_ASSEMBLER_COMBINE_ROW)
|
|
|
391 |
|
|
|
392 |
#define BPP2 2
|
|
|
393 |
#define BPP3 3 /* bytes per pixel (a.k.a. pixel_bytes) */
|
|
|
394 |
#define BPP4 4
|
|
|
395 |
#define BPP6 6 /* (defined only to help avoid cut-and-paste errors) */
|
|
|
396 |
#define BPP8 8
|
|
|
397 |
|
|
|
398 |
/* Combines the row recently read in with the previous row.
|
|
|
399 |
This routine takes care of alpha and transparency if requested.
|
|
|
400 |
This routine also handles the two methods of progressive display
|
|
|
401 |
of interlaced images, depending on the mask value.
|
|
|
402 |
The mask value describes which pixels are to be combined with
|
|
|
403 |
the row. The pattern always repeats every 8 pixels, so just 8
|
|
|
404 |
bits are needed. A one indicates the pixel is to be combined; a
|
|
|
405 |
zero indicates the pixel is to be skipped. This is in addition
|
|
|
406 |
to any alpha or transparency value associated with the pixel.
|
|
|
407 |
If you want all pixels to be combined, pass 0xff (255) in mask. */
|
|
|
408 |
|
|
|
409 |
/* Use this routine for the x86 platform - it uses a faster MMX routine
|
|
|
410 |
if the machine supports MMX. */
|
|
|
411 |
|
|
|
412 |
void /* PRIVATE */
|
|
|
413 |
png_combine_row(png_structp png_ptr, png_bytep row, int mask)
|
|
|
414 |
{
|
|
|
415 |
png_debug(1, "in png_combine_row (pnggccrd.c)\n");
|
|
|
416 |
|
|
|
417 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|
|
418 |
if (_mmx_supported == 2) {
|
|
|
419 |
#if !defined(PNG_1_0_X)
|
|
|
420 |
/* this should have happened in png_init_mmx_flags() already */
|
|
|
421 |
png_warning(png_ptr, "asm_flags may not have been initialized");
|
|
|
422 |
#endif
|
|
|
423 |
png_mmx_support();
|
|
|
424 |
}
|
|
|
425 |
#endif
|
|
|
426 |
|
|
|
427 |
if (mask == 0xff)
|
|
|
428 |
{
|
|
|
429 |
png_debug(2,"mask == 0xff: doing single png_memcpy()\n");
|
|
|
430 |
png_memcpy(row, png_ptr->row_buf + 1,
|
|
|
431 |
(png_size_t)PNG_ROWBYTES(png_ptr->row_info.pixel_depth,png_ptr->width));
|
|
|
432 |
}
|
|
|
433 |
else /* (png_combine_row() is never called with mask == 0) */
|
|
|
434 |
{
|
|
|
435 |
switch (png_ptr->row_info.pixel_depth)
|
|
|
436 |
{
|
|
|
437 |
case 1: /* png_ptr->row_info.pixel_depth */
|
|
|
438 |
{
|
|
|
439 |
png_bytep sp;
|
|
|
440 |
png_bytep dp;
|
|
|
441 |
int s_inc, s_start, s_end;
|
|
|
442 |
int m;
|
|
|
443 |
int shift;
|
|
|
444 |
png_uint_32 i;
|
|
|
445 |
|
|
|
446 |
sp = png_ptr->row_buf + 1;
|
|
|
447 |
dp = row;
|
|
|
448 |
m = 0x80;
|
|
|
449 |
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|
|
450 |
if (png_ptr->transformations & PNG_PACKSWAP)
|
|
|
451 |
{
|
|
|
452 |
s_start = 0;
|
|
|
453 |
s_end = 7;
|
|
|
454 |
s_inc = 1;
|
|
|
455 |
}
|
|
|
456 |
else
|
|
|
457 |
#endif
|
|
|
458 |
{
|
|
|
459 |
s_start = 7;
|
|
|
460 |
s_end = 0;
|
|
|
461 |
s_inc = -1;
|
|
|
462 |
}
|
|
|
463 |
|
|
|
464 |
shift = s_start;
|
|
|
465 |
|
|
|
466 |
for (i = 0; i < png_ptr->width; i++)
|
|
|
467 |
{
|
|
|
468 |
if (m & mask)
|
|
|
469 |
{
|
|
|
470 |
int value;
|
|
|
471 |
|
|
|
472 |
value = (*sp >> shift) & 0x1;
|
|
|
473 |
*dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
|
|
|
474 |
*dp |= (png_byte)(value << shift);
|
|
|
475 |
}
|
|
|
476 |
|
|
|
477 |
if (shift == s_end)
|
|
|
478 |
{
|
|
|
479 |
shift = s_start;
|
|
|
480 |
sp++;
|
|
|
481 |
dp++;
|
|
|
482 |
}
|
|
|
483 |
else
|
|
|
484 |
shift += s_inc;
|
|
|
485 |
|
|
|
486 |
if (m == 1)
|
|
|
487 |
m = 0x80;
|
|
|
488 |
else
|
|
|
489 |
m >>= 1;
|
|
|
490 |
}
|
|
|
491 |
break;
|
|
|
492 |
}
|
|
|
493 |
|
|
|
494 |
case 2: /* png_ptr->row_info.pixel_depth */
|
|
|
495 |
{
|
|
|
496 |
png_bytep sp;
|
|
|
497 |
png_bytep dp;
|
|
|
498 |
int s_start, s_end, s_inc;
|
|
|
499 |
int m;
|
|
|
500 |
int shift;
|
|
|
501 |
png_uint_32 i;
|
|
|
502 |
int value;
|
|
|
503 |
|
|
|
504 |
sp = png_ptr->row_buf + 1;
|
|
|
505 |
dp = row;
|
|
|
506 |
m = 0x80;
|
|
|
507 |
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|
|
508 |
if (png_ptr->transformations & PNG_PACKSWAP)
|
|
|
509 |
{
|
|
|
510 |
s_start = 0;
|
|
|
511 |
s_end = 6;
|
|
|
512 |
s_inc = 2;
|
|
|
513 |
}
|
|
|
514 |
else
|
|
|
515 |
#endif
|
|
|
516 |
{
|
|
|
517 |
s_start = 6;
|
|
|
518 |
s_end = 0;
|
|
|
519 |
s_inc = -2;
|
|
|
520 |
}
|
|
|
521 |
|
|
|
522 |
shift = s_start;
|
|
|
523 |
|
|
|
524 |
for (i = 0; i < png_ptr->width; i++)
|
|
|
525 |
{
|
|
|
526 |
if (m & mask)
|
|
|
527 |
{
|
|
|
528 |
value = (*sp >> shift) & 0x3;
|
|
|
529 |
*dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
|
|
|
530 |
*dp |= (png_byte)(value << shift);
|
|
|
531 |
}
|
|
|
532 |
|
|
|
533 |
if (shift == s_end)
|
|
|
534 |
{
|
|
|
535 |
shift = s_start;
|
|
|
536 |
sp++;
|
|
|
537 |
dp++;
|
|
|
538 |
}
|
|
|
539 |
else
|
|
|
540 |
shift += s_inc;
|
|
|
541 |
if (m == 1)
|
|
|
542 |
m = 0x80;
|
|
|
543 |
else
|
|
|
544 |
m >>= 1;
|
|
|
545 |
}
|
|
|
546 |
break;
|
|
|
547 |
}
|
|
|
548 |
|
|
|
549 |
case 4: /* png_ptr->row_info.pixel_depth */
|
|
|
550 |
{
|
|
|
551 |
png_bytep sp;
|
|
|
552 |
png_bytep dp;
|
|
|
553 |
int s_start, s_end, s_inc;
|
|
|
554 |
int m;
|
|
|
555 |
int shift;
|
|
|
556 |
png_uint_32 i;
|
|
|
557 |
int value;
|
|
|
558 |
|
|
|
559 |
sp = png_ptr->row_buf + 1;
|
|
|
560 |
dp = row;
|
|
|
561 |
m = 0x80;
|
|
|
562 |
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|
|
563 |
if (png_ptr->transformations & PNG_PACKSWAP)
|
|
|
564 |
{
|
|
|
565 |
s_start = 0;
|
|
|
566 |
s_end = 4;
|
|
|
567 |
s_inc = 4;
|
|
|
568 |
}
|
|
|
569 |
else
|
|
|
570 |
#endif
|
|
|
571 |
{
|
|
|
572 |
s_start = 4;
|
|
|
573 |
s_end = 0;
|
|
|
574 |
s_inc = -4;
|
|
|
575 |
}
|
|
|
576 |
shift = s_start;
|
|
|
577 |
|
|
|
578 |
for (i = 0; i < png_ptr->width; i++)
|
|
|
579 |
{
|
|
|
580 |
if (m & mask)
|
|
|
581 |
{
|
|
|
582 |
value = (*sp >> shift) & 0xf;
|
|
|
583 |
*dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
|
|
|
584 |
*dp |= (png_byte)(value << shift);
|
|
|
585 |
}
|
|
|
586 |
|
|
|
587 |
if (shift == s_end)
|
|
|
588 |
{
|
|
|
589 |
shift = s_start;
|
|
|
590 |
sp++;
|
|
|
591 |
dp++;
|
|
|
592 |
}
|
|
|
593 |
else
|
|
|
594 |
shift += s_inc;
|
|
|
595 |
if (m == 1)
|
|
|
596 |
m = 0x80;
|
|
|
597 |
else
|
|
|
598 |
m >>= 1;
|
|
|
599 |
}
|
|
|
600 |
break;
|
|
|
601 |
}
|
|
|
602 |
|
|
|
603 |
case 8: /* png_ptr->row_info.pixel_depth */
|
|
|
604 |
{
|
|
|
605 |
png_bytep srcptr;
|
|
|
606 |
png_bytep dstptr;
|
|
|
607 |
|
|
|
608 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
609 |
#if !defined(PNG_1_0_X)
|
|
|
610 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|
|
611 |
/* && _mmx_supported */ )
|
|
|
612 |
#else
|
|
|
613 |
if (_mmx_supported)
|
|
|
614 |
#endif
|
|
|
615 |
{
|
|
|
616 |
png_uint_32 len;
|
|
|
617 |
int diff;
|
|
|
618 |
int dummy_value_a; // fix 'forbidden register spilled' error
|
|
|
619 |
int dummy_value_d;
|
|
|
620 |
int dummy_value_c;
|
|
|
621 |
int dummy_value_S;
|
|
|
622 |
int dummy_value_D;
|
|
|
623 |
_unmask = ~mask; // global variable for -fPIC version
|
|
|
624 |
srcptr = png_ptr->row_buf + 1;
|
|
|
625 |
dstptr = row;
|
|
|
626 |
len = png_ptr->width &~7; // reduce to multiple of 8
|
|
|
627 |
diff = (int) (png_ptr->width & 7); // amount lost
|
|
|
628 |
|
|
|
629 |
__asm__ __volatile__ (
|
|
|
630 |
"movd _unmask, %%mm7 \n\t" // load bit pattern
|
|
|
631 |
"psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|
|
632 |
"punpcklbw %%mm7, %%mm7 \n\t"
|
|
|
633 |
"punpcklwd %%mm7, %%mm7 \n\t"
|
|
|
634 |
"punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|
|
635 |
|
|
|
636 |
"movq _mask8_0, %%mm0 \n\t"
|
|
|
637 |
"pand %%mm7, %%mm0 \n\t" // nonzero if keep byte
|
|
|
638 |
"pcmpeqb %%mm6, %%mm0 \n\t" // zeros->1s, v versa
|
|
|
639 |
|
|
|
640 |
// preload "movl len, %%ecx \n\t" // load length of line
|
|
|
641 |
// preload "movl srcptr, %%esi \n\t" // load source
|
|
|
642 |
// preload "movl dstptr, %%edi \n\t" // load dest
|
|
|
643 |
|
|
|
644 |
"cmpl $0, %%ecx \n\t" // len == 0 ?
|
|
|
645 |
"je mainloop8end \n\t"
|
|
|
646 |
|
|
|
647 |
"mainloop8: \n\t"
|
|
|
648 |
"movq (%%esi), %%mm4 \n\t" // *srcptr
|
|
|
649 |
"pand %%mm0, %%mm4 \n\t"
|
|
|
650 |
"movq %%mm0, %%mm6 \n\t"
|
|
|
651 |
"pandn (%%edi), %%mm6 \n\t" // *dstptr
|
|
|
652 |
"por %%mm6, %%mm4 \n\t"
|
|
|
653 |
"movq %%mm4, (%%edi) \n\t"
|
|
|
654 |
"addl $8, %%esi \n\t" // inc by 8 bytes processed
|
|
|
655 |
"addl $8, %%edi \n\t"
|
|
|
656 |
"subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|
|
657 |
"ja mainloop8 \n\t"
|
|
|
658 |
|
|
|
659 |
"mainloop8end: \n\t"
|
|
|
660 |
// preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|
|
661 |
"movl %%eax, %%ecx \n\t"
|
|
|
662 |
"cmpl $0, %%ecx \n\t"
|
|
|
663 |
"jz end8 \n\t"
|
|
|
664 |
// preload "movl mask, %%edx \n\t"
|
|
|
665 |
"sall $24, %%edx \n\t" // make low byte, high byte
|
|
|
666 |
|
|
|
667 |
"secondloop8: \n\t"
|
|
|
668 |
"sall %%edx \n\t" // move high bit to CF
|
|
|
669 |
"jnc skip8 \n\t" // if CF = 0
|
|
|
670 |
"movb (%%esi), %%al \n\t"
|
|
|
671 |
"movb %%al, (%%edi) \n\t"
|
|
|
672 |
|
|
|
673 |
"skip8: \n\t"
|
|
|
674 |
"incl %%esi \n\t"
|
|
|
675 |
"incl %%edi \n\t"
|
|
|
676 |
"decl %%ecx \n\t"
|
|
|
677 |
"jnz secondloop8 \n\t"
|
|
|
678 |
|
|
|
679 |
"end8: \n\t"
|
|
|
680 |
"EMMS \n\t" // DONE
|
|
|
681 |
|
|
|
682 |
: "=a" (dummy_value_a), // output regs (dummy)
|
|
|
683 |
"=d" (dummy_value_d),
|
|
|
684 |
"=c" (dummy_value_c),
|
|
|
685 |
"=S" (dummy_value_S),
|
|
|
686 |
"=D" (dummy_value_D)
|
|
|
687 |
|
|
|
688 |
: "3" (srcptr), // esi // input regs
|
|
|
689 |
"4" (dstptr), // edi
|
|
|
690 |
"0" (diff), // eax
|
|
|
691 |
// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|
|
692 |
"2" (len), // ecx
|
|
|
693 |
"1" (mask) // edx
|
|
|
694 |
|
|
|
695 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
696 |
: "%mm0", "%mm4", "%mm6", "%mm7" // clobber list
|
|
|
697 |
#endif
|
|
|
698 |
);
|
|
|
699 |
}
|
|
|
700 |
else /* mmx _not supported - Use modified C routine */
|
|
|
701 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
702 |
{
|
|
|
703 |
register png_uint_32 i;
|
|
|
704 |
png_uint_32 initial_val = png_pass_start[png_ptr->pass];
|
|
|
705 |
/* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|
|
706 |
register int stride = png_pass_inc[png_ptr->pass];
|
|
|
707 |
/* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|
|
708 |
register int rep_bytes = png_pass_width[png_ptr->pass];
|
|
|
709 |
/* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|
|
710 |
png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|
|
711 |
int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|
|
712 |
register png_uint_32 final_val = len; /* GRR bugfix */
|
|
|
713 |
|
|
|
714 |
srcptr = png_ptr->row_buf + 1 + initial_val;
|
|
|
715 |
dstptr = row + initial_val;
|
|
|
716 |
|
|
|
717 |
for (i = initial_val; i < final_val; i += stride)
|
|
|
718 |
{
|
|
|
719 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
720 |
srcptr += stride;
|
|
|
721 |
dstptr += stride;
|
|
|
722 |
}
|
|
|
723 |
if (diff) /* number of leftover pixels: 3 for pngtest */
|
|
|
724 |
{
|
|
|
725 |
final_val+=diff /* *BPP1 */ ;
|
|
|
726 |
for (; i < final_val; i += stride)
|
|
|
727 |
{
|
|
|
728 |
if (rep_bytes > (int)(final_val-i))
|
|
|
729 |
rep_bytes = (int)(final_val-i);
|
|
|
730 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
731 |
srcptr += stride;
|
|
|
732 |
dstptr += stride;
|
|
|
733 |
}
|
|
|
734 |
}
|
|
|
735 |
|
|
|
736 |
} /* end of else (_mmx_supported) */
|
|
|
737 |
|
|
|
738 |
break;
|
|
|
739 |
} /* end 8 bpp */
|
|
|
740 |
|
|
|
741 |
case 16: /* png_ptr->row_info.pixel_depth */
|
|
|
742 |
{
|
|
|
743 |
png_bytep srcptr;
|
|
|
744 |
png_bytep dstptr;
|
|
|
745 |
|
|
|
746 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
747 |
#if !defined(PNG_1_0_X)
|
|
|
748 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|
|
749 |
/* && _mmx_supported */ )
|
|
|
750 |
#else
|
|
|
751 |
if (_mmx_supported)
|
|
|
752 |
#endif
|
|
|
753 |
{
|
|
|
754 |
png_uint_32 len;
|
|
|
755 |
int diff;
|
|
|
756 |
int dummy_value_a; // fix 'forbidden register spilled' error
|
|
|
757 |
int dummy_value_d;
|
|
|
758 |
int dummy_value_c;
|
|
|
759 |
int dummy_value_S;
|
|
|
760 |
int dummy_value_D;
|
|
|
761 |
_unmask = ~mask; // global variable for -fPIC version
|
|
|
762 |
srcptr = png_ptr->row_buf + 1;
|
|
|
763 |
dstptr = row;
|
|
|
764 |
len = png_ptr->width &~7; // reduce to multiple of 8
|
|
|
765 |
diff = (int) (png_ptr->width & 7); // amount lost //
|
|
|
766 |
|
|
|
767 |
__asm__ __volatile__ (
|
|
|
768 |
"movd _unmask, %%mm7 \n\t" // load bit pattern
|
|
|
769 |
"psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|
|
770 |
"punpcklbw %%mm7, %%mm7 \n\t"
|
|
|
771 |
"punpcklwd %%mm7, %%mm7 \n\t"
|
|
|
772 |
"punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|
|
773 |
|
|
|
774 |
"movq _mask16_0, %%mm0 \n\t"
|
|
|
775 |
"movq _mask16_1, %%mm1 \n\t"
|
|
|
776 |
|
|
|
777 |
"pand %%mm7, %%mm0 \n\t"
|
|
|
778 |
"pand %%mm7, %%mm1 \n\t"
|
|
|
779 |
|
|
|
780 |
"pcmpeqb %%mm6, %%mm0 \n\t"
|
|
|
781 |
"pcmpeqb %%mm6, %%mm1 \n\t"
|
|
|
782 |
|
|
|
783 |
// preload "movl len, %%ecx \n\t" // load length of line
|
|
|
784 |
// preload "movl srcptr, %%esi \n\t" // load source
|
|
|
785 |
// preload "movl dstptr, %%edi \n\t" // load dest
|
|
|
786 |
|
|
|
787 |
"cmpl $0, %%ecx \n\t"
|
|
|
788 |
"jz mainloop16end \n\t"
|
|
|
789 |
|
|
|
790 |
"mainloop16: \n\t"
|
|
|
791 |
"movq (%%esi), %%mm4 \n\t"
|
|
|
792 |
"pand %%mm0, %%mm4 \n\t"
|
|
|
793 |
"movq %%mm0, %%mm6 \n\t"
|
|
|
794 |
"movq (%%edi), %%mm7 \n\t"
|
|
|
795 |
"pandn %%mm7, %%mm6 \n\t"
|
|
|
796 |
"por %%mm6, %%mm4 \n\t"
|
|
|
797 |
"movq %%mm4, (%%edi) \n\t"
|
|
|
798 |
|
|
|
799 |
"movq 8(%%esi), %%mm5 \n\t"
|
|
|
800 |
"pand %%mm1, %%mm5 \n\t"
|
|
|
801 |
"movq %%mm1, %%mm7 \n\t"
|
|
|
802 |
"movq 8(%%edi), %%mm6 \n\t"
|
|
|
803 |
"pandn %%mm6, %%mm7 \n\t"
|
|
|
804 |
"por %%mm7, %%mm5 \n\t"
|
|
|
805 |
"movq %%mm5, 8(%%edi) \n\t"
|
|
|
806 |
|
|
|
807 |
"addl $16, %%esi \n\t" // inc by 16 bytes processed
|
|
|
808 |
"addl $16, %%edi \n\t"
|
|
|
809 |
"subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|
|
810 |
"ja mainloop16 \n\t"
|
|
|
811 |
|
|
|
812 |
"mainloop16end: \n\t"
|
|
|
813 |
// preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|
|
814 |
"movl %%eax, %%ecx \n\t"
|
|
|
815 |
"cmpl $0, %%ecx \n\t"
|
|
|
816 |
"jz end16 \n\t"
|
|
|
817 |
// preload "movl mask, %%edx \n\t"
|
|
|
818 |
"sall $24, %%edx \n\t" // make low byte, high byte
|
|
|
819 |
|
|
|
820 |
"secondloop16: \n\t"
|
|
|
821 |
"sall %%edx \n\t" // move high bit to CF
|
|
|
822 |
"jnc skip16 \n\t" // if CF = 0
|
|
|
823 |
"movw (%%esi), %%ax \n\t"
|
|
|
824 |
"movw %%ax, (%%edi) \n\t"
|
|
|
825 |
|
|
|
826 |
"skip16: \n\t"
|
|
|
827 |
"addl $2, %%esi \n\t"
|
|
|
828 |
"addl $2, %%edi \n\t"
|
|
|
829 |
"decl %%ecx \n\t"
|
|
|
830 |
"jnz secondloop16 \n\t"
|
|
|
831 |
|
|
|
832 |
"end16: \n\t"
|
|
|
833 |
"EMMS \n\t" // DONE
|
|
|
834 |
|
|
|
835 |
: "=a" (dummy_value_a), // output regs (dummy)
|
|
|
836 |
"=c" (dummy_value_c),
|
|
|
837 |
"=d" (dummy_value_d),
|
|
|
838 |
"=S" (dummy_value_S),
|
|
|
839 |
"=D" (dummy_value_D)
|
|
|
840 |
|
|
|
841 |
: "0" (diff), // eax // input regs
|
|
|
842 |
// was (unmask) " " RESERVED // ebx // Global Offset Table idx
|
|
|
843 |
"1" (len), // ecx
|
|
|
844 |
"2" (mask), // edx
|
|
|
845 |
"3" (srcptr), // esi
|
|
|
846 |
"4" (dstptr) // edi
|
|
|
847 |
|
|
|
848 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
849 |
: "%mm0", "%mm1", "%mm4" // clobber list
|
|
|
850 |
, "%mm5", "%mm6", "%mm7"
|
|
|
851 |
#endif
|
|
|
852 |
);
|
|
|
853 |
}
|
|
|
854 |
else /* mmx _not supported - Use modified C routine */
|
|
|
855 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
856 |
{
|
|
|
857 |
register png_uint_32 i;
|
|
|
858 |
png_uint_32 initial_val = BPP2 * png_pass_start[png_ptr->pass];
|
|
|
859 |
/* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|
|
860 |
register int stride = BPP2 * png_pass_inc[png_ptr->pass];
|
|
|
861 |
/* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|
|
862 |
register int rep_bytes = BPP2 * png_pass_width[png_ptr->pass];
|
|
|
863 |
/* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|
|
864 |
png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|
|
865 |
int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|
|
866 |
register png_uint_32 final_val = BPP2 * len; /* GRR bugfix */
|
|
|
867 |
|
|
|
868 |
srcptr = png_ptr->row_buf + 1 + initial_val;
|
|
|
869 |
dstptr = row + initial_val;
|
|
|
870 |
|
|
|
871 |
for (i = initial_val; i < final_val; i += stride)
|
|
|
872 |
{
|
|
|
873 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
874 |
srcptr += stride;
|
|
|
875 |
dstptr += stride;
|
|
|
876 |
}
|
|
|
877 |
if (diff) /* number of leftover pixels: 3 for pngtest */
|
|
|
878 |
{
|
|
|
879 |
final_val+=diff*BPP2;
|
|
|
880 |
for (; i < final_val; i += stride)
|
|
|
881 |
{
|
|
|
882 |
if (rep_bytes > (int)(final_val-i))
|
|
|
883 |
rep_bytes = (int)(final_val-i);
|
|
|
884 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
885 |
srcptr += stride;
|
|
|
886 |
dstptr += stride;
|
|
|
887 |
}
|
|
|
888 |
}
|
|
|
889 |
} /* end of else (_mmx_supported) */
|
|
|
890 |
|
|
|
891 |
break;
|
|
|
892 |
} /* end 16 bpp */
|
|
|
893 |
|
|
|
894 |
case 24: /* png_ptr->row_info.pixel_depth */
|
|
|
895 |
{
|
|
|
896 |
png_bytep srcptr;
|
|
|
897 |
png_bytep dstptr;
|
|
|
898 |
|
|
|
899 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
900 |
#if !defined(PNG_1_0_X)
|
|
|
901 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|
|
902 |
/* && _mmx_supported */ )
|
|
|
903 |
#else
|
|
|
904 |
if (_mmx_supported)
|
|
|
905 |
#endif
|
|
|
906 |
{
|
|
|
907 |
png_uint_32 len;
|
|
|
908 |
int diff;
|
|
|
909 |
int dummy_value_a; // fix 'forbidden register spilled' error
|
|
|
910 |
int dummy_value_d;
|
|
|
911 |
int dummy_value_c;
|
|
|
912 |
int dummy_value_S;
|
|
|
913 |
int dummy_value_D;
|
|
|
914 |
_unmask = ~mask; // global variable for -fPIC version
|
|
|
915 |
srcptr = png_ptr->row_buf + 1;
|
|
|
916 |
dstptr = row;
|
|
|
917 |
len = png_ptr->width &~7; // reduce to multiple of 8
|
|
|
918 |
diff = (int) (png_ptr->width & 7); // amount lost //
|
|
|
919 |
|
|
|
920 |
__asm__ __volatile__ (
|
|
|
921 |
"movd _unmask, %%mm7 \n\t" // load bit pattern
|
|
|
922 |
"psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|
|
923 |
"punpcklbw %%mm7, %%mm7 \n\t"
|
|
|
924 |
"punpcklwd %%mm7, %%mm7 \n\t"
|
|
|
925 |
"punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|
|
926 |
|
|
|
927 |
"movq _mask24_0, %%mm0 \n\t"
|
|
|
928 |
"movq _mask24_1, %%mm1 \n\t"
|
|
|
929 |
"movq _mask24_2, %%mm2 \n\t"
|
|
|
930 |
|
|
|
931 |
"pand %%mm7, %%mm0 \n\t"
|
|
|
932 |
"pand %%mm7, %%mm1 \n\t"
|
|
|
933 |
"pand %%mm7, %%mm2 \n\t"
|
|
|
934 |
|
|
|
935 |
"pcmpeqb %%mm6, %%mm0 \n\t"
|
|
|
936 |
"pcmpeqb %%mm6, %%mm1 \n\t"
|
|
|
937 |
"pcmpeqb %%mm6, %%mm2 \n\t"
|
|
|
938 |
|
|
|
939 |
// preload "movl len, %%ecx \n\t" // load length of line
|
|
|
940 |
// preload "movl srcptr, %%esi \n\t" // load source
|
|
|
941 |
// preload "movl dstptr, %%edi \n\t" // load dest
|
|
|
942 |
|
|
|
943 |
"cmpl $0, %%ecx \n\t"
|
|
|
944 |
"jz mainloop24end \n\t"
|
|
|
945 |
|
|
|
946 |
"mainloop24: \n\t"
|
|
|
947 |
"movq (%%esi), %%mm4 \n\t"
|
|
|
948 |
"pand %%mm0, %%mm4 \n\t"
|
|
|
949 |
"movq %%mm0, %%mm6 \n\t"
|
|
|
950 |
"movq (%%edi), %%mm7 \n\t"
|
|
|
951 |
"pandn %%mm7, %%mm6 \n\t"
|
|
|
952 |
"por %%mm6, %%mm4 \n\t"
|
|
|
953 |
"movq %%mm4, (%%edi) \n\t"
|
|
|
954 |
|
|
|
955 |
"movq 8(%%esi), %%mm5 \n\t"
|
|
|
956 |
"pand %%mm1, %%mm5 \n\t"
|
|
|
957 |
"movq %%mm1, %%mm7 \n\t"
|
|
|
958 |
"movq 8(%%edi), %%mm6 \n\t"
|
|
|
959 |
"pandn %%mm6, %%mm7 \n\t"
|
|
|
960 |
"por %%mm7, %%mm5 \n\t"
|
|
|
961 |
"movq %%mm5, 8(%%edi) \n\t"
|
|
|
962 |
|
|
|
963 |
"movq 16(%%esi), %%mm6 \n\t"
|
|
|
964 |
"pand %%mm2, %%mm6 \n\t"
|
|
|
965 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
966 |
"movq 16(%%edi), %%mm7 \n\t"
|
|
|
967 |
"pandn %%mm7, %%mm4 \n\t"
|
|
|
968 |
"por %%mm4, %%mm6 \n\t"
|
|
|
969 |
"movq %%mm6, 16(%%edi) \n\t"
|
|
|
970 |
|
|
|
971 |
"addl $24, %%esi \n\t" // inc by 24 bytes processed
|
|
|
972 |
"addl $24, %%edi \n\t"
|
|
|
973 |
"subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|
|
974 |
|
|
|
975 |
"ja mainloop24 \n\t"
|
|
|
976 |
|
|
|
977 |
"mainloop24end: \n\t"
|
|
|
978 |
// preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|
|
979 |
"movl %%eax, %%ecx \n\t"
|
|
|
980 |
"cmpl $0, %%ecx \n\t"
|
|
|
981 |
"jz end24 \n\t"
|
|
|
982 |
// preload "movl mask, %%edx \n\t"
|
|
|
983 |
"sall $24, %%edx \n\t" // make low byte, high byte
|
|
|
984 |
|
|
|
985 |
"secondloop24: \n\t"
|
|
|
986 |
"sall %%edx \n\t" // move high bit to CF
|
|
|
987 |
"jnc skip24 \n\t" // if CF = 0
|
|
|
988 |
"movw (%%esi), %%ax \n\t"
|
|
|
989 |
"movw %%ax, (%%edi) \n\t"
|
|
|
990 |
"xorl %%eax, %%eax \n\t"
|
|
|
991 |
"movb 2(%%esi), %%al \n\t"
|
|
|
992 |
"movb %%al, 2(%%edi) \n\t"
|
|
|
993 |
|
|
|
994 |
"skip24: \n\t"
|
|
|
995 |
"addl $3, %%esi \n\t"
|
|
|
996 |
"addl $3, %%edi \n\t"
|
|
|
997 |
"decl %%ecx \n\t"
|
|
|
998 |
"jnz secondloop24 \n\t"
|
|
|
999 |
|
|
|
1000 |
"end24: \n\t"
|
|
|
1001 |
"EMMS \n\t" // DONE
|
|
|
1002 |
|
|
|
1003 |
: "=a" (dummy_value_a), // output regs (dummy)
|
|
|
1004 |
"=d" (dummy_value_d),
|
|
|
1005 |
"=c" (dummy_value_c),
|
|
|
1006 |
"=S" (dummy_value_S),
|
|
|
1007 |
"=D" (dummy_value_D)
|
|
|
1008 |
|
|
|
1009 |
: "3" (srcptr), // esi // input regs
|
|
|
1010 |
"4" (dstptr), // edi
|
|
|
1011 |
"0" (diff), // eax
|
|
|
1012 |
// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|
|
1013 |
"2" (len), // ecx
|
|
|
1014 |
"1" (mask) // edx
|
|
|
1015 |
|
|
|
1016 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
1017 |
: "%mm0", "%mm1", "%mm2" // clobber list
|
|
|
1018 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
1019 |
#endif
|
|
|
1020 |
);
|
|
|
1021 |
}
|
|
|
1022 |
else /* mmx _not supported - Use modified C routine */
|
|
|
1023 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
1024 |
{
|
|
|
1025 |
register png_uint_32 i;
|
|
|
1026 |
png_uint_32 initial_val = BPP3 * png_pass_start[png_ptr->pass];
|
|
|
1027 |
/* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|
|
1028 |
register int stride = BPP3 * png_pass_inc[png_ptr->pass];
|
|
|
1029 |
/* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|
|
1030 |
register int rep_bytes = BPP3 * png_pass_width[png_ptr->pass];
|
|
|
1031 |
/* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|
|
1032 |
png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|
|
1033 |
int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|
|
1034 |
register png_uint_32 final_val = BPP3 * len; /* GRR bugfix */
|
|
|
1035 |
|
|
|
1036 |
srcptr = png_ptr->row_buf + 1 + initial_val;
|
|
|
1037 |
dstptr = row + initial_val;
|
|
|
1038 |
|
|
|
1039 |
for (i = initial_val; i < final_val; i += stride)
|
|
|
1040 |
{
|
|
|
1041 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1042 |
srcptr += stride;
|
|
|
1043 |
dstptr += stride;
|
|
|
1044 |
}
|
|
|
1045 |
if (diff) /* number of leftover pixels: 3 for pngtest */
|
|
|
1046 |
{
|
|
|
1047 |
final_val+=diff*BPP3;
|
|
|
1048 |
for (; i < final_val; i += stride)
|
|
|
1049 |
{
|
|
|
1050 |
if (rep_bytes > (int)(final_val-i))
|
|
|
1051 |
rep_bytes = (int)(final_val-i);
|
|
|
1052 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1053 |
srcptr += stride;
|
|
|
1054 |
dstptr += stride;
|
|
|
1055 |
}
|
|
|
1056 |
}
|
|
|
1057 |
} /* end of else (_mmx_supported) */
|
|
|
1058 |
|
|
|
1059 |
break;
|
|
|
1060 |
} /* end 24 bpp */
|
|
|
1061 |
|
|
|
1062 |
case 32: /* png_ptr->row_info.pixel_depth */
|
|
|
1063 |
{
|
|
|
1064 |
png_bytep srcptr;
|
|
|
1065 |
png_bytep dstptr;
|
|
|
1066 |
|
|
|
1067 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
1068 |
#if !defined(PNG_1_0_X)
|
|
|
1069 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|
|
1070 |
/* && _mmx_supported */ )
|
|
|
1071 |
#else
|
|
|
1072 |
if (_mmx_supported)
|
|
|
1073 |
#endif
|
|
|
1074 |
{
|
|
|
1075 |
png_uint_32 len;
|
|
|
1076 |
int diff;
|
|
|
1077 |
int dummy_value_a; // fix 'forbidden register spilled' error
|
|
|
1078 |
int dummy_value_d;
|
|
|
1079 |
int dummy_value_c;
|
|
|
1080 |
int dummy_value_S;
|
|
|
1081 |
int dummy_value_D;
|
|
|
1082 |
_unmask = ~mask; // global variable for -fPIC version
|
|
|
1083 |
srcptr = png_ptr->row_buf + 1;
|
|
|
1084 |
dstptr = row;
|
|
|
1085 |
len = png_ptr->width &~7; // reduce to multiple of 8
|
|
|
1086 |
diff = (int) (png_ptr->width & 7); // amount lost //
|
|
|
1087 |
|
|
|
1088 |
__asm__ __volatile__ (
|
|
|
1089 |
"movd _unmask, %%mm7 \n\t" // load bit pattern
|
|
|
1090 |
"psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|
|
1091 |
"punpcklbw %%mm7, %%mm7 \n\t"
|
|
|
1092 |
"punpcklwd %%mm7, %%mm7 \n\t"
|
|
|
1093 |
"punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|
|
1094 |
|
|
|
1095 |
"movq _mask32_0, %%mm0 \n\t"
|
|
|
1096 |
"movq _mask32_1, %%mm1 \n\t"
|
|
|
1097 |
"movq _mask32_2, %%mm2 \n\t"
|
|
|
1098 |
"movq _mask32_3, %%mm3 \n\t"
|
|
|
1099 |
|
|
|
1100 |
"pand %%mm7, %%mm0 \n\t"
|
|
|
1101 |
"pand %%mm7, %%mm1 \n\t"
|
|
|
1102 |
"pand %%mm7, %%mm2 \n\t"
|
|
|
1103 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
1104 |
|
|
|
1105 |
"pcmpeqb %%mm6, %%mm0 \n\t"
|
|
|
1106 |
"pcmpeqb %%mm6, %%mm1 \n\t"
|
|
|
1107 |
"pcmpeqb %%mm6, %%mm2 \n\t"
|
|
|
1108 |
"pcmpeqb %%mm6, %%mm3 \n\t"
|
|
|
1109 |
|
|
|
1110 |
// preload "movl len, %%ecx \n\t" // load length of line
|
|
|
1111 |
// preload "movl srcptr, %%esi \n\t" // load source
|
|
|
1112 |
// preload "movl dstptr, %%edi \n\t" // load dest
|
|
|
1113 |
|
|
|
1114 |
"cmpl $0, %%ecx \n\t" // lcr
|
|
|
1115 |
"jz mainloop32end \n\t"
|
|
|
1116 |
|
|
|
1117 |
"mainloop32: \n\t"
|
|
|
1118 |
"movq (%%esi), %%mm4 \n\t"
|
|
|
1119 |
"pand %%mm0, %%mm4 \n\t"
|
|
|
1120 |
"movq %%mm0, %%mm6 \n\t"
|
|
|
1121 |
"movq (%%edi), %%mm7 \n\t"
|
|
|
1122 |
"pandn %%mm7, %%mm6 \n\t"
|
|
|
1123 |
"por %%mm6, %%mm4 \n\t"
|
|
|
1124 |
"movq %%mm4, (%%edi) \n\t"
|
|
|
1125 |
|
|
|
1126 |
"movq 8(%%esi), %%mm5 \n\t"
|
|
|
1127 |
"pand %%mm1, %%mm5 \n\t"
|
|
|
1128 |
"movq %%mm1, %%mm7 \n\t"
|
|
|
1129 |
"movq 8(%%edi), %%mm6 \n\t"
|
|
|
1130 |
"pandn %%mm6, %%mm7 \n\t"
|
|
|
1131 |
"por %%mm7, %%mm5 \n\t"
|
|
|
1132 |
"movq %%mm5, 8(%%edi) \n\t"
|
|
|
1133 |
|
|
|
1134 |
"movq 16(%%esi), %%mm6 \n\t"
|
|
|
1135 |
"pand %%mm2, %%mm6 \n\t"
|
|
|
1136 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
1137 |
"movq 16(%%edi), %%mm7 \n\t"
|
|
|
1138 |
"pandn %%mm7, %%mm4 \n\t"
|
|
|
1139 |
"por %%mm4, %%mm6 \n\t"
|
|
|
1140 |
"movq %%mm6, 16(%%edi) \n\t"
|
|
|
1141 |
|
|
|
1142 |
"movq 24(%%esi), %%mm7 \n\t"
|
|
|
1143 |
"pand %%mm3, %%mm7 \n\t"
|
|
|
1144 |
"movq %%mm3, %%mm5 \n\t"
|
|
|
1145 |
"movq 24(%%edi), %%mm4 \n\t"
|
|
|
1146 |
"pandn %%mm4, %%mm5 \n\t"
|
|
|
1147 |
"por %%mm5, %%mm7 \n\t"
|
|
|
1148 |
"movq %%mm7, 24(%%edi) \n\t"
|
|
|
1149 |
|
|
|
1150 |
"addl $32, %%esi \n\t" // inc by 32 bytes processed
|
|
|
1151 |
"addl $32, %%edi \n\t"
|
|
|
1152 |
"subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|
|
1153 |
"ja mainloop32 \n\t"
|
|
|
1154 |
|
|
|
1155 |
"mainloop32end: \n\t"
|
|
|
1156 |
// preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|
|
1157 |
"movl %%eax, %%ecx \n\t"
|
|
|
1158 |
"cmpl $0, %%ecx \n\t"
|
|
|
1159 |
"jz end32 \n\t"
|
|
|
1160 |
// preload "movl mask, %%edx \n\t"
|
|
|
1161 |
"sall $24, %%edx \n\t" // low byte => high byte
|
|
|
1162 |
|
|
|
1163 |
"secondloop32: \n\t"
|
|
|
1164 |
"sall %%edx \n\t" // move high bit to CF
|
|
|
1165 |
"jnc skip32 \n\t" // if CF = 0
|
|
|
1166 |
"movl (%%esi), %%eax \n\t"
|
|
|
1167 |
"movl %%eax, (%%edi) \n\t"
|
|
|
1168 |
|
|
|
1169 |
"skip32: \n\t"
|
|
|
1170 |
"addl $4, %%esi \n\t"
|
|
|
1171 |
"addl $4, %%edi \n\t"
|
|
|
1172 |
"decl %%ecx \n\t"
|
|
|
1173 |
"jnz secondloop32 \n\t"
|
|
|
1174 |
|
|
|
1175 |
"end32: \n\t"
|
|
|
1176 |
"EMMS \n\t" // DONE
|
|
|
1177 |
|
|
|
1178 |
: "=a" (dummy_value_a), // output regs (dummy)
|
|
|
1179 |
"=d" (dummy_value_d),
|
|
|
1180 |
"=c" (dummy_value_c),
|
|
|
1181 |
"=S" (dummy_value_S),
|
|
|
1182 |
"=D" (dummy_value_D)
|
|
|
1183 |
|
|
|
1184 |
: "3" (srcptr), // esi // input regs
|
|
|
1185 |
"4" (dstptr), // edi
|
|
|
1186 |
"0" (diff), // eax
|
|
|
1187 |
// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|
|
1188 |
"2" (len), // ecx
|
|
|
1189 |
"1" (mask) // edx
|
|
|
1190 |
|
|
|
1191 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
1192 |
: "%mm0", "%mm1", "%mm2", "%mm3" // clobber list
|
|
|
1193 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
1194 |
#endif
|
|
|
1195 |
);
|
|
|
1196 |
}
|
|
|
1197 |
else /* mmx _not supported - Use modified C routine */
|
|
|
1198 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
1199 |
{
|
|
|
1200 |
register png_uint_32 i;
|
|
|
1201 |
png_uint_32 initial_val = BPP4 * png_pass_start[png_ptr->pass];
|
|
|
1202 |
/* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|
|
1203 |
register int stride = BPP4 * png_pass_inc[png_ptr->pass];
|
|
|
1204 |
/* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|
|
1205 |
register int rep_bytes = BPP4 * png_pass_width[png_ptr->pass];
|
|
|
1206 |
/* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|
|
1207 |
png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|
|
1208 |
int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|
|
1209 |
register png_uint_32 final_val = BPP4 * len; /* GRR bugfix */
|
|
|
1210 |
|
|
|
1211 |
srcptr = png_ptr->row_buf + 1 + initial_val;
|
|
|
1212 |
dstptr = row + initial_val;
|
|
|
1213 |
|
|
|
1214 |
for (i = initial_val; i < final_val; i += stride)
|
|
|
1215 |
{
|
|
|
1216 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1217 |
srcptr += stride;
|
|
|
1218 |
dstptr += stride;
|
|
|
1219 |
}
|
|
|
1220 |
if (diff) /* number of leftover pixels: 3 for pngtest */
|
|
|
1221 |
{
|
|
|
1222 |
final_val+=diff*BPP4;
|
|
|
1223 |
for (; i < final_val; i += stride)
|
|
|
1224 |
{
|
|
|
1225 |
if (rep_bytes > (int)(final_val-i))
|
|
|
1226 |
rep_bytes = (int)(final_val-i);
|
|
|
1227 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1228 |
srcptr += stride;
|
|
|
1229 |
dstptr += stride;
|
|
|
1230 |
}
|
|
|
1231 |
}
|
|
|
1232 |
} /* end of else (_mmx_supported) */
|
|
|
1233 |
|
|
|
1234 |
break;
|
|
|
1235 |
} /* end 32 bpp */
|
|
|
1236 |
|
|
|
1237 |
case 48: /* png_ptr->row_info.pixel_depth */
|
|
|
1238 |
{
|
|
|
1239 |
png_bytep srcptr;
|
|
|
1240 |
png_bytep dstptr;
|
|
|
1241 |
|
|
|
1242 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
1243 |
#if !defined(PNG_1_0_X)
|
|
|
1244 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|
|
1245 |
/* && _mmx_supported */ )
|
|
|
1246 |
#else
|
|
|
1247 |
if (_mmx_supported)
|
|
|
1248 |
#endif
|
|
|
1249 |
{
|
|
|
1250 |
png_uint_32 len;
|
|
|
1251 |
int diff;
|
|
|
1252 |
int dummy_value_a; // fix 'forbidden register spilled' error
|
|
|
1253 |
int dummy_value_d;
|
|
|
1254 |
int dummy_value_c;
|
|
|
1255 |
int dummy_value_S;
|
|
|
1256 |
int dummy_value_D;
|
|
|
1257 |
_unmask = ~mask; // global variable for -fPIC version
|
|
|
1258 |
srcptr = png_ptr->row_buf + 1;
|
|
|
1259 |
dstptr = row;
|
|
|
1260 |
len = png_ptr->width &~7; // reduce to multiple of 8
|
|
|
1261 |
diff = (int) (png_ptr->width & 7); // amount lost //
|
|
|
1262 |
|
|
|
1263 |
__asm__ __volatile__ (
|
|
|
1264 |
"movd _unmask, %%mm7 \n\t" // load bit pattern
|
|
|
1265 |
"psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|
|
1266 |
"punpcklbw %%mm7, %%mm7 \n\t"
|
|
|
1267 |
"punpcklwd %%mm7, %%mm7 \n\t"
|
|
|
1268 |
"punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|
|
1269 |
|
|
|
1270 |
"movq _mask48_0, %%mm0 \n\t"
|
|
|
1271 |
"movq _mask48_1, %%mm1 \n\t"
|
|
|
1272 |
"movq _mask48_2, %%mm2 \n\t"
|
|
|
1273 |
"movq _mask48_3, %%mm3 \n\t"
|
|
|
1274 |
"movq _mask48_4, %%mm4 \n\t"
|
|
|
1275 |
"movq _mask48_5, %%mm5 \n\t"
|
|
|
1276 |
|
|
|
1277 |
"pand %%mm7, %%mm0 \n\t"
|
|
|
1278 |
"pand %%mm7, %%mm1 \n\t"
|
|
|
1279 |
"pand %%mm7, %%mm2 \n\t"
|
|
|
1280 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
1281 |
"pand %%mm7, %%mm4 \n\t"
|
|
|
1282 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
1283 |
|
|
|
1284 |
"pcmpeqb %%mm6, %%mm0 \n\t"
|
|
|
1285 |
"pcmpeqb %%mm6, %%mm1 \n\t"
|
|
|
1286 |
"pcmpeqb %%mm6, %%mm2 \n\t"
|
|
|
1287 |
"pcmpeqb %%mm6, %%mm3 \n\t"
|
|
|
1288 |
"pcmpeqb %%mm6, %%mm4 \n\t"
|
|
|
1289 |
"pcmpeqb %%mm6, %%mm5 \n\t"
|
|
|
1290 |
|
|
|
1291 |
// preload "movl len, %%ecx \n\t" // load length of line
|
|
|
1292 |
// preload "movl srcptr, %%esi \n\t" // load source
|
|
|
1293 |
// preload "movl dstptr, %%edi \n\t" // load dest
|
|
|
1294 |
|
|
|
1295 |
"cmpl $0, %%ecx \n\t"
|
|
|
1296 |
"jz mainloop48end \n\t"
|
|
|
1297 |
|
|
|
1298 |
"mainloop48: \n\t"
|
|
|
1299 |
"movq (%%esi), %%mm7 \n\t"
|
|
|
1300 |
"pand %%mm0, %%mm7 \n\t"
|
|
|
1301 |
"movq %%mm0, %%mm6 \n\t"
|
|
|
1302 |
"pandn (%%edi), %%mm6 \n\t"
|
|
|
1303 |
"por %%mm6, %%mm7 \n\t"
|
|
|
1304 |
"movq %%mm7, (%%edi) \n\t"
|
|
|
1305 |
|
|
|
1306 |
"movq 8(%%esi), %%mm6 \n\t"
|
|
|
1307 |
"pand %%mm1, %%mm6 \n\t"
|
|
|
1308 |
"movq %%mm1, %%mm7 \n\t"
|
|
|
1309 |
"pandn 8(%%edi), %%mm7 \n\t"
|
|
|
1310 |
"por %%mm7, %%mm6 \n\t"
|
|
|
1311 |
"movq %%mm6, 8(%%edi) \n\t"
|
|
|
1312 |
|
|
|
1313 |
"movq 16(%%esi), %%mm6 \n\t"
|
|
|
1314 |
"pand %%mm2, %%mm6 \n\t"
|
|
|
1315 |
"movq %%mm2, %%mm7 \n\t"
|
|
|
1316 |
"pandn 16(%%edi), %%mm7 \n\t"
|
|
|
1317 |
"por %%mm7, %%mm6 \n\t"
|
|
|
1318 |
"movq %%mm6, 16(%%edi) \n\t"
|
|
|
1319 |
|
|
|
1320 |
"movq 24(%%esi), %%mm7 \n\t"
|
|
|
1321 |
"pand %%mm3, %%mm7 \n\t"
|
|
|
1322 |
"movq %%mm3, %%mm6 \n\t"
|
|
|
1323 |
"pandn 24(%%edi), %%mm6 \n\t"
|
|
|
1324 |
"por %%mm6, %%mm7 \n\t"
|
|
|
1325 |
"movq %%mm7, 24(%%edi) \n\t"
|
|
|
1326 |
|
|
|
1327 |
"movq 32(%%esi), %%mm6 \n\t"
|
|
|
1328 |
"pand %%mm4, %%mm6 \n\t"
|
|
|
1329 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
1330 |
"pandn 32(%%edi), %%mm7 \n\t"
|
|
|
1331 |
"por %%mm7, %%mm6 \n\t"
|
|
|
1332 |
"movq %%mm6, 32(%%edi) \n\t"
|
|
|
1333 |
|
|
|
1334 |
"movq 40(%%esi), %%mm7 \n\t"
|
|
|
1335 |
"pand %%mm5, %%mm7 \n\t"
|
|
|
1336 |
"movq %%mm5, %%mm6 \n\t"
|
|
|
1337 |
"pandn 40(%%edi), %%mm6 \n\t"
|
|
|
1338 |
"por %%mm6, %%mm7 \n\t"
|
|
|
1339 |
"movq %%mm7, 40(%%edi) \n\t"
|
|
|
1340 |
|
|
|
1341 |
"addl $48, %%esi \n\t" // inc by 48 bytes processed
|
|
|
1342 |
"addl $48, %%edi \n\t"
|
|
|
1343 |
"subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|
|
1344 |
|
|
|
1345 |
"ja mainloop48 \n\t"
|
|
|
1346 |
|
|
|
1347 |
"mainloop48end: \n\t"
|
|
|
1348 |
// preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|
|
1349 |
"movl %%eax, %%ecx \n\t"
|
|
|
1350 |
"cmpl $0, %%ecx \n\t"
|
|
|
1351 |
"jz end48 \n\t"
|
|
|
1352 |
// preload "movl mask, %%edx \n\t"
|
|
|
1353 |
"sall $24, %%edx \n\t" // make low byte, high byte
|
|
|
1354 |
|
|
|
1355 |
"secondloop48: \n\t"
|
|
|
1356 |
"sall %%edx \n\t" // move high bit to CF
|
|
|
1357 |
"jnc skip48 \n\t" // if CF = 0
|
|
|
1358 |
"movl (%%esi), %%eax \n\t"
|
|
|
1359 |
"movl %%eax, (%%edi) \n\t"
|
|
|
1360 |
|
|
|
1361 |
"skip48: \n\t"
|
|
|
1362 |
"addl $4, %%esi \n\t"
|
|
|
1363 |
"addl $4, %%edi \n\t"
|
|
|
1364 |
"decl %%ecx \n\t"
|
|
|
1365 |
"jnz secondloop48 \n\t"
|
|
|
1366 |
|
|
|
1367 |
"end48: \n\t"
|
|
|
1368 |
"EMMS \n\t" // DONE
|
|
|
1369 |
|
|
|
1370 |
: "=a" (dummy_value_a), // output regs (dummy)
|
|
|
1371 |
"=d" (dummy_value_d),
|
|
|
1372 |
"=c" (dummy_value_c),
|
|
|
1373 |
"=S" (dummy_value_S),
|
|
|
1374 |
"=D" (dummy_value_D)
|
|
|
1375 |
|
|
|
1376 |
: "3" (srcptr), // esi // input regs
|
|
|
1377 |
"4" (dstptr), // edi
|
|
|
1378 |
"0" (diff), // eax
|
|
|
1379 |
// was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|
|
1380 |
"2" (len), // ecx
|
|
|
1381 |
"1" (mask) // edx
|
|
|
1382 |
|
|
|
1383 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
1384 |
: "%mm0", "%mm1", "%mm2", "%mm3" // clobber list
|
|
|
1385 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
1386 |
#endif
|
|
|
1387 |
);
|
|
|
1388 |
}
|
|
|
1389 |
else /* mmx _not supported - Use modified C routine */
|
|
|
1390 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
1391 |
{
|
|
|
1392 |
register png_uint_32 i;
|
|
|
1393 |
png_uint_32 initial_val = BPP6 * png_pass_start[png_ptr->pass];
|
|
|
1394 |
/* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|
|
1395 |
register int stride = BPP6 * png_pass_inc[png_ptr->pass];
|
|
|
1396 |
/* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|
|
1397 |
register int rep_bytes = BPP6 * png_pass_width[png_ptr->pass];
|
|
|
1398 |
/* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|
|
1399 |
png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|
|
1400 |
int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|
|
1401 |
register png_uint_32 final_val = BPP6 * len; /* GRR bugfix */
|
|
|
1402 |
|
|
|
1403 |
srcptr = png_ptr->row_buf + 1 + initial_val;
|
|
|
1404 |
dstptr = row + initial_val;
|
|
|
1405 |
|
|
|
1406 |
for (i = initial_val; i < final_val; i += stride)
|
|
|
1407 |
{
|
|
|
1408 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1409 |
srcptr += stride;
|
|
|
1410 |
dstptr += stride;
|
|
|
1411 |
}
|
|
|
1412 |
if (diff) /* number of leftover pixels: 3 for pngtest */
|
|
|
1413 |
{
|
|
|
1414 |
final_val+=diff*BPP6;
|
|
|
1415 |
for (; i < final_val; i += stride)
|
|
|
1416 |
{
|
|
|
1417 |
if (rep_bytes > (int)(final_val-i))
|
|
|
1418 |
rep_bytes = (int)(final_val-i);
|
|
|
1419 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1420 |
srcptr += stride;
|
|
|
1421 |
dstptr += stride;
|
|
|
1422 |
}
|
|
|
1423 |
}
|
|
|
1424 |
} /* end of else (_mmx_supported) */
|
|
|
1425 |
|
|
|
1426 |
break;
|
|
|
1427 |
} /* end 48 bpp */
|
|
|
1428 |
|
|
|
1429 |
case 64: /* png_ptr->row_info.pixel_depth */
|
|
|
1430 |
{
|
|
|
1431 |
png_bytep srcptr;
|
|
|
1432 |
png_bytep dstptr;
|
|
|
1433 |
register png_uint_32 i;
|
|
|
1434 |
png_uint_32 initial_val = BPP8 * png_pass_start[png_ptr->pass];
|
|
|
1435 |
/* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|
|
1436 |
register int stride = BPP8 * png_pass_inc[png_ptr->pass];
|
|
|
1437 |
/* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|
|
1438 |
register int rep_bytes = BPP8 * png_pass_width[png_ptr->pass];
|
|
|
1439 |
/* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|
|
1440 |
png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|
|
1441 |
int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|
|
1442 |
register png_uint_32 final_val = BPP8 * len; /* GRR bugfix */
|
|
|
1443 |
|
|
|
1444 |
srcptr = png_ptr->row_buf + 1 + initial_val;
|
|
|
1445 |
dstptr = row + initial_val;
|
|
|
1446 |
|
|
|
1447 |
for (i = initial_val; i < final_val; i += stride)
|
|
|
1448 |
{
|
|
|
1449 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1450 |
srcptr += stride;
|
|
|
1451 |
dstptr += stride;
|
|
|
1452 |
}
|
|
|
1453 |
if (diff) /* number of leftover pixels: 3 for pngtest */
|
|
|
1454 |
{
|
|
|
1455 |
final_val+=diff*BPP8;
|
|
|
1456 |
for (; i < final_val; i += stride)
|
|
|
1457 |
{
|
|
|
1458 |
if (rep_bytes > (int)(final_val-i))
|
|
|
1459 |
rep_bytes = (int)(final_val-i);
|
|
|
1460 |
png_memcpy(dstptr, srcptr, rep_bytes);
|
|
|
1461 |
srcptr += stride;
|
|
|
1462 |
dstptr += stride;
|
|
|
1463 |
}
|
|
|
1464 |
}
|
|
|
1465 |
|
|
|
1466 |
break;
|
|
|
1467 |
} /* end 64 bpp */
|
|
|
1468 |
|
|
|
1469 |
default: /* png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 */
|
|
|
1470 |
{
|
|
|
1471 |
/* this should never happen */
|
|
|
1472 |
png_warning(png_ptr, "Invalid row_info.pixel_depth in pnggccrd");
|
|
|
1473 |
break;
|
|
|
1474 |
}
|
|
|
1475 |
} /* end switch (png_ptr->row_info.pixel_depth) */
|
|
|
1476 |
|
|
|
1477 |
} /* end if (non-trivial mask) */
|
|
|
1478 |
|
|
|
1479 |
} /* end png_combine_row() */
|
|
|
1480 |
|
|
|
1481 |
#endif /* PNG_HAVE_ASSEMBLER_COMBINE_ROW */
|
|
|
1482 |
|
|
|
1483 |
|
|
|
1484 |
|
|
|
1485 |
|
|
|
1486 |
/*===========================================================================*/
|
|
|
1487 |
/* */
|
|
|
1488 |
/* P N G _ D O _ R E A D _ I N T E R L A C E */
|
|
|
1489 |
/* */
|
|
|
1490 |
/*===========================================================================*/
|
|
|
1491 |
|
|
|
1492 |
#if defined(PNG_READ_INTERLACING_SUPPORTED)
|
|
|
1493 |
#if defined(PNG_HAVE_ASSEMBLER_READ_INTERLACE)
|
|
|
1494 |
|
|
|
1495 |
/* png_do_read_interlace() is called after any 16-bit to 8-bit conversion
|
|
|
1496 |
* has taken place. [GRR: what other steps come before and/or after?]
|
|
|
1497 |
*/
|
|
|
1498 |
|
|
|
1499 |
void /* PRIVATE */
|
|
|
1500 |
png_do_read_interlace(png_structp png_ptr)
|
|
|
1501 |
{
|
|
|
1502 |
png_row_infop row_info = &(png_ptr->row_info);
|
|
|
1503 |
png_bytep row = png_ptr->row_buf + 1;
|
|
|
1504 |
int pass = png_ptr->pass;
|
|
|
1505 |
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|
|
1506 |
png_uint_32 transformations = png_ptr->transformations;
|
|
|
1507 |
#endif
|
|
|
1508 |
|
|
|
1509 |
png_debug(1, "in png_do_read_interlace (pnggccrd.c)\n");
|
|
|
1510 |
|
|
|
1511 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|
|
1512 |
if (_mmx_supported == 2) {
|
|
|
1513 |
#if !defined(PNG_1_0_X)
|
|
|
1514 |
/* this should have happened in png_init_mmx_flags() already */
|
|
|
1515 |
png_warning(png_ptr, "asm_flags may not have been initialized");
|
|
|
1516 |
#endif
|
|
|
1517 |
png_mmx_support();
|
|
|
1518 |
}
|
|
|
1519 |
#endif
|
|
|
1520 |
|
|
|
1521 |
if (row != NULL && row_info != NULL)
|
|
|
1522 |
{
|
|
|
1523 |
png_uint_32 final_width;
|
|
|
1524 |
|
|
|
1525 |
final_width = row_info->width * png_pass_inc[pass];
|
|
|
1526 |
|
|
|
1527 |
switch (row_info->pixel_depth)
|
|
|
1528 |
{
|
|
|
1529 |
case 1:
|
|
|
1530 |
{
|
|
|
1531 |
png_bytep sp, dp;
|
|
|
1532 |
int sshift, dshift;
|
|
|
1533 |
int s_start, s_end, s_inc;
|
|
|
1534 |
png_byte v;
|
|
|
1535 |
png_uint_32 i;
|
|
|
1536 |
int j;
|
|
|
1537 |
|
|
|
1538 |
sp = row + (png_size_t)((row_info->width - 1) >> 3);
|
|
|
1539 |
dp = row + (png_size_t)((final_width - 1) >> 3);
|
|
|
1540 |
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|
|
1541 |
if (transformations & PNG_PACKSWAP)
|
|
|
1542 |
{
|
|
|
1543 |
sshift = (int)((row_info->width + 7) & 7);
|
|
|
1544 |
dshift = (int)((final_width + 7) & 7);
|
|
|
1545 |
s_start = 7;
|
|
|
1546 |
s_end = 0;
|
|
|
1547 |
s_inc = -1;
|
|
|
1548 |
}
|
|
|
1549 |
else
|
|
|
1550 |
#endif
|
|
|
1551 |
{
|
|
|
1552 |
sshift = 7 - (int)((row_info->width + 7) & 7);
|
|
|
1553 |
dshift = 7 - (int)((final_width + 7) & 7);
|
|
|
1554 |
s_start = 0;
|
|
|
1555 |
s_end = 7;
|
|
|
1556 |
s_inc = 1;
|
|
|
1557 |
}
|
|
|
1558 |
|
|
|
1559 |
for (i = row_info->width; i; i--)
|
|
|
1560 |
{
|
|
|
1561 |
v = (png_byte)((*sp >> sshift) & 0x1);
|
|
|
1562 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
1563 |
{
|
|
|
1564 |
*dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
|
|
|
1565 |
*dp |= (png_byte)(v << dshift);
|
|
|
1566 |
if (dshift == s_end)
|
|
|
1567 |
{
|
|
|
1568 |
dshift = s_start;
|
|
|
1569 |
dp--;
|
|
|
1570 |
}
|
|
|
1571 |
else
|
|
|
1572 |
dshift += s_inc;
|
|
|
1573 |
}
|
|
|
1574 |
if (sshift == s_end)
|
|
|
1575 |
{
|
|
|
1576 |
sshift = s_start;
|
|
|
1577 |
sp--;
|
|
|
1578 |
}
|
|
|
1579 |
else
|
|
|
1580 |
sshift += s_inc;
|
|
|
1581 |
}
|
|
|
1582 |
break;
|
|
|
1583 |
}
|
|
|
1584 |
|
|
|
1585 |
case 2:
|
|
|
1586 |
{
|
|
|
1587 |
png_bytep sp, dp;
|
|
|
1588 |
int sshift, dshift;
|
|
|
1589 |
int s_start, s_end, s_inc;
|
|
|
1590 |
png_uint_32 i;
|
|
|
1591 |
|
|
|
1592 |
sp = row + (png_size_t)((row_info->width - 1) >> 2);
|
|
|
1593 |
dp = row + (png_size_t)((final_width - 1) >> 2);
|
|
|
1594 |
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|
|
1595 |
if (transformations & PNG_PACKSWAP)
|
|
|
1596 |
{
|
|
|
1597 |
sshift = (png_size_t)(((row_info->width + 3) & 3) << 1);
|
|
|
1598 |
dshift = (png_size_t)(((final_width + 3) & 3) << 1);
|
|
|
1599 |
s_start = 6;
|
|
|
1600 |
s_end = 0;
|
|
|
1601 |
s_inc = -2;
|
|
|
1602 |
}
|
|
|
1603 |
else
|
|
|
1604 |
#endif
|
|
|
1605 |
{
|
|
|
1606 |
sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1);
|
|
|
1607 |
dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1);
|
|
|
1608 |
s_start = 0;
|
|
|
1609 |
s_end = 6;
|
|
|
1610 |
s_inc = 2;
|
|
|
1611 |
}
|
|
|
1612 |
|
|
|
1613 |
for (i = row_info->width; i; i--)
|
|
|
1614 |
{
|
|
|
1615 |
png_byte v;
|
|
|
1616 |
int j;
|
|
|
1617 |
|
|
|
1618 |
v = (png_byte)((*sp >> sshift) & 0x3);
|
|
|
1619 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
1620 |
{
|
|
|
1621 |
*dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);
|
|
|
1622 |
*dp |= (png_byte)(v << dshift);
|
|
|
1623 |
if (dshift == s_end)
|
|
|
1624 |
{
|
|
|
1625 |
dshift = s_start;
|
|
|
1626 |
dp--;
|
|
|
1627 |
}
|
|
|
1628 |
else
|
|
|
1629 |
dshift += s_inc;
|
|
|
1630 |
}
|
|
|
1631 |
if (sshift == s_end)
|
|
|
1632 |
{
|
|
|
1633 |
sshift = s_start;
|
|
|
1634 |
sp--;
|
|
|
1635 |
}
|
|
|
1636 |
else
|
|
|
1637 |
sshift += s_inc;
|
|
|
1638 |
}
|
|
|
1639 |
break;
|
|
|
1640 |
}
|
|
|
1641 |
|
|
|
1642 |
case 4:
|
|
|
1643 |
{
|
|
|
1644 |
png_bytep sp, dp;
|
|
|
1645 |
int sshift, dshift;
|
|
|
1646 |
int s_start, s_end, s_inc;
|
|
|
1647 |
png_uint_32 i;
|
|
|
1648 |
|
|
|
1649 |
sp = row + (png_size_t)((row_info->width - 1) >> 1);
|
|
|
1650 |
dp = row + (png_size_t)((final_width - 1) >> 1);
|
|
|
1651 |
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|
|
1652 |
if (transformations & PNG_PACKSWAP)
|
|
|
1653 |
{
|
|
|
1654 |
sshift = (png_size_t)(((row_info->width + 1) & 1) << 2);
|
|
|
1655 |
dshift = (png_size_t)(((final_width + 1) & 1) << 2);
|
|
|
1656 |
s_start = 4;
|
|
|
1657 |
s_end = 0;
|
|
|
1658 |
s_inc = -4;
|
|
|
1659 |
}
|
|
|
1660 |
else
|
|
|
1661 |
#endif
|
|
|
1662 |
{
|
|
|
1663 |
sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2);
|
|
|
1664 |
dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2);
|
|
|
1665 |
s_start = 0;
|
|
|
1666 |
s_end = 4;
|
|
|
1667 |
s_inc = 4;
|
|
|
1668 |
}
|
|
|
1669 |
|
|
|
1670 |
for (i = row_info->width; i; i--)
|
|
|
1671 |
{
|
|
|
1672 |
png_byte v;
|
|
|
1673 |
int j;
|
|
|
1674 |
|
|
|
1675 |
v = (png_byte)((*sp >> sshift) & 0xf);
|
|
|
1676 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
1677 |
{
|
|
|
1678 |
*dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);
|
|
|
1679 |
*dp |= (png_byte)(v << dshift);
|
|
|
1680 |
if (dshift == s_end)
|
|
|
1681 |
{
|
|
|
1682 |
dshift = s_start;
|
|
|
1683 |
dp--;
|
|
|
1684 |
}
|
|
|
1685 |
else
|
|
|
1686 |
dshift += s_inc;
|
|
|
1687 |
}
|
|
|
1688 |
if (sshift == s_end)
|
|
|
1689 |
{
|
|
|
1690 |
sshift = s_start;
|
|
|
1691 |
sp--;
|
|
|
1692 |
}
|
|
|
1693 |
else
|
|
|
1694 |
sshift += s_inc;
|
|
|
1695 |
}
|
|
|
1696 |
break;
|
|
|
1697 |
}
|
|
|
1698 |
|
|
|
1699 |
/*====================================================================*/
|
|
|
1700 |
|
|
|
1701 |
default: /* 8-bit or larger (this is where the routine is modified) */
|
|
|
1702 |
{
|
|
|
1703 |
#if 0
|
|
|
1704 |
// static unsigned long long _const4 = 0x0000000000FFFFFFLL; no good
|
|
|
1705 |
// static unsigned long long const4 = 0x0000000000FFFFFFLL; no good
|
|
|
1706 |
// unsigned long long _const4 = 0x0000000000FFFFFFLL; no good
|
|
|
1707 |
// unsigned long long const4 = 0x0000000000FFFFFFLL; no good
|
|
|
1708 |
#endif
|
|
|
1709 |
png_bytep sptr, dp;
|
|
|
1710 |
png_uint_32 i;
|
|
|
1711 |
png_size_t pixel_bytes;
|
|
|
1712 |
int width = (int)row_info->width;
|
|
|
1713 |
|
|
|
1714 |
pixel_bytes = (row_info->pixel_depth >> 3);
|
|
|
1715 |
|
|
|
1716 |
/* point sptr at the last pixel in the pre-expanded row: */
|
|
|
1717 |
sptr = row + (width - 1) * pixel_bytes;
|
|
|
1718 |
|
|
|
1719 |
/* point dp at the last pixel position in the expanded row: */
|
|
|
1720 |
dp = row + (final_width - 1) * pixel_bytes;
|
|
|
1721 |
|
|
|
1722 |
/* New code by Nirav Chhatrapati - Intel Corporation */
|
|
|
1723 |
|
|
|
1724 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|
|
1725 |
#if !defined(PNG_1_0_X)
|
|
|
1726 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
|
|
|
1727 |
/* && _mmx_supported */ )
|
|
|
1728 |
#else
|
|
|
1729 |
if (_mmx_supported)
|
|
|
1730 |
#endif
|
|
|
1731 |
{
|
|
|
1732 |
//--------------------------------------------------------------
|
|
|
1733 |
if (pixel_bytes == 3)
|
|
|
1734 |
{
|
|
|
1735 |
if (((pass == 0) || (pass == 1)) && width)
|
|
|
1736 |
{
|
|
|
1737 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
1738 |
int dummy_value_S;
|
|
|
1739 |
int dummy_value_D;
|
|
|
1740 |
|
|
|
1741 |
__asm__ __volatile__ (
|
|
|
1742 |
"subl $21, %%edi \n\t"
|
|
|
1743 |
// (png_pass_inc[pass] - 1)*pixel_bytes
|
|
|
1744 |
|
|
|
1745 |
".loop3_pass0: \n\t"
|
|
|
1746 |
"movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
|
|
|
1747 |
"pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
|
|
|
1748 |
"movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
|
|
|
1749 |
"psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
|
|
|
1750 |
"movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
|
|
|
1751 |
"psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z
|
|
|
1752 |
"psrlq $8, %%mm1 \n\t" // z z z z z z 2 1
|
|
|
1753 |
"por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z
|
|
|
1754 |
"por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1
|
|
|
1755 |
"movq %%mm0, %%mm3 \n\t" // 2 1 0 2 1 0 2 1
|
|
|
1756 |
"psllq $16, %%mm0 \n\t" // 0 2 1 0 2 1 z z
|
|
|
1757 |
"movq %%mm3, %%mm4 \n\t" // 2 1 0 2 1 0 2 1
|
|
|
1758 |
"punpckhdq %%mm0, %%mm3 \n\t" // 0 2 1 0 2 1 0 2
|
|
|
1759 |
"movq %%mm4, 16(%%edi) \n\t"
|
|
|
1760 |
"psrlq $32, %%mm0 \n\t" // z z z z 0 2 1 0
|
|
|
1761 |
"movq %%mm3, 8(%%edi) \n\t"
|
|
|
1762 |
"punpckldq %%mm4, %%mm0 \n\t" // 1 0 2 1 0 2 1 0
|
|
|
1763 |
"subl $3, %%esi \n\t"
|
|
|
1764 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
1765 |
"subl $24, %%edi \n\t"
|
|
|
1766 |
"decl %%ecx \n\t"
|
|
|
1767 |
"jnz .loop3_pass0 \n\t"
|
|
|
1768 |
"EMMS \n\t" // DONE
|
|
|
1769 |
|
|
|
1770 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
1771 |
"=S" (dummy_value_S),
|
|
|
1772 |
"=D" (dummy_value_D)
|
|
|
1773 |
|
|
|
1774 |
: "1" (sptr), // esi // input regs
|
|
|
1775 |
"2" (dp), // edi
|
|
|
1776 |
"0" (width), // ecx
|
|
|
1777 |
"rim" (_const4) // %1(?) (0x0000000000FFFFFFLL)
|
|
|
1778 |
|
|
|
1779 |
#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
1780 |
: "%mm0", "%mm1", "%mm2" // clobber list
|
|
|
1781 |
, "%mm3", "%mm4"
|
|
|
1782 |
#endif
|
|
|
1783 |
);
|
|
|
1784 |
}
|
|
|
1785 |
else if (((pass == 2) || (pass == 3)) && width)
|
|
|
1786 |
{
|
|
|
1787 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
1788 |
int dummy_value_S;
|
|
|
1789 |
int dummy_value_D;
|
|
|
1790 |
|
|
|
1791 |
__asm__ __volatile__ (
|
|
|
1792 |
"subl $9, %%edi \n\t"
|
|
|
1793 |
// (png_pass_inc[pass] - 1)*pixel_bytes
|
|
|
1794 |
|
|
|
1795 |
".loop3_pass2: \n\t"
|
|
|
1796 |
"movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
|
|
|
1797 |
"pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
|
|
|
1798 |
"movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
|
|
|
1799 |
"psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
|
|
|
1800 |
"movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
|
|
|
1801 |
"psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z
|
|
|
1802 |
"psrlq $8, %%mm1 \n\t" // z z z z z z 2 1
|
|
|
1803 |
"por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z
|
|
|
1804 |
"por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1
|
|
|
1805 |
"movq %%mm0, 4(%%edi) \n\t"
|
|
|
1806 |
"psrlq $16, %%mm0 \n\t" // z z 2 1 0 2 1 0
|
|
|
1807 |
"subl $3, %%esi \n\t"
|
|
|
1808 |
"movd %%mm0, (%%edi) \n\t"
|
|
|
1809 |
"subl $12, %%edi \n\t"
|
|
|
1810 |
"decl %%ecx \n\t"
|
|
|
1811 |
"jnz .loop3_pass2 \n\t"
|
|
|
1812 |
"EMMS \n\t" // DONE
|
|
|
1813 |
|
|
|
1814 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
1815 |
"=S" (dummy_value_S),
|
|
|
1816 |
"=D" (dummy_value_D)
|
|
|
1817 |
|
|
|
1818 |
: "1" (sptr), // esi // input regs
|
|
|
1819 |
"2" (dp), // edi
|
|
|
1820 |
"0" (width), // ecx
|
|
|
1821 |
"rim" (_const4) // (0x0000000000FFFFFFLL)
|
|
|
1822 |
|
|
|
1823 |
#if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
1824 |
: "%mm0", "%mm1", "%mm2" // clobber list
|
|
|
1825 |
#endif
|
|
|
1826 |
);
|
|
|
1827 |
}
|
|
|
1828 |
else if (width) /* && ((pass == 4) || (pass == 5)) */
|
|
|
1829 |
{
|
|
|
1830 |
int width_mmx = ((width >> 1) << 1) - 8; // GRR: huh?
|
|
|
1831 |
if (width_mmx < 0)
|
|
|
1832 |
width_mmx = 0;
|
|
|
1833 |
width -= width_mmx; // 8 or 9 pix, 24 or 27 bytes
|
|
|
1834 |
if (width_mmx)
|
|
|
1835 |
{
|
|
|
1836 |
// png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
|
|
|
1837 |
// sptr points at last pixel in pre-expanded row
|
|
|
1838 |
// dp points at last pixel position in expanded row
|
|
|
1839 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
1840 |
int dummy_value_S;
|
|
|
1841 |
int dummy_value_D;
|
|
|
1842 |
|
|
|
1843 |
__asm__ __volatile__ (
|
|
|
1844 |
"subl $3, %%esi \n\t"
|
|
|
1845 |
"subl $9, %%edi \n\t"
|
|
|
1846 |
// (png_pass_inc[pass] + 1)*pixel_bytes
|
|
|
1847 |
|
|
|
1848 |
".loop3_pass4: \n\t"
|
|
|
1849 |
"movq (%%esi), %%mm0 \n\t" // x x 5 4 3 2 1 0
|
|
|
1850 |
"movq %%mm0, %%mm1 \n\t" // x x 5 4 3 2 1 0
|
|
|
1851 |
"movq %%mm0, %%mm2 \n\t" // x x 5 4 3 2 1 0
|
|
|
1852 |
"psllq $24, %%mm0 \n\t" // 4 3 2 1 0 z z z
|
|
|
1853 |
"pand _const4, %%mm1 \n\t" // z z z z z 2 1 0
|
|
|
1854 |
"psrlq $24, %%mm2 \n\t" // z z z x x 5 4 3
|
|
|
1855 |
"por %%mm1, %%mm0 \n\t" // 4 3 2 1 0 2 1 0
|
|
|
1856 |
"movq %%mm2, %%mm3 \n\t" // z z z x x 5 4 3
|
|
|
1857 |
"psllq $8, %%mm2 \n\t" // z z x x 5 4 3 z
|
|
|
1858 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
1859 |
"psrlq $16, %%mm3 \n\t" // z z z z z x x 5
|
|
|
1860 |
"pand _const6, %%mm3 \n\t" // z z z z z z z 5
|
|
|
1861 |
"por %%mm3, %%mm2 \n\t" // z z x x 5 4 3 5
|
|
|
1862 |
"subl $6, %%esi \n\t"
|
|
|
1863 |
"movd %%mm2, 8(%%edi) \n\t"
|
|
|
1864 |
"subl $12, %%edi \n\t"
|
|
|
1865 |
"subl $2, %%ecx \n\t"
|
|
|
1866 |
"jnz .loop3_pass4 \n\t"
|
|
|
1867 |
"EMMS \n\t" // DONE
|
|
|
1868 |
|
|
|
1869 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
1870 |
"=S" (dummy_value_S),
|
|
|
1871 |
"=D" (dummy_value_D)
|
|
|
1872 |
|
|
|
1873 |
: "1" (sptr), // esi // input regs
|
|
|
1874 |
"2" (dp), // edi
|
|
|
1875 |
"0" (width_mmx), // ecx
|
|
|
1876 |
"rim" (_const4), // 0x0000000000FFFFFFLL
|
|
|
1877 |
"rim" (_const6) // 0x00000000000000FFLL
|
|
|
1878 |
|
|
|
1879 |
#if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
1880 |
: "%mm0", "%mm1" // clobber list
|
|
|
1881 |
, "%mm2", "%mm3"
|
|
|
1882 |
#endif
|
|
|
1883 |
);
|
|
|
1884 |
}
|
|
|
1885 |
|
|
|
1886 |
sptr -= width_mmx*3;
|
|
|
1887 |
dp -= width_mmx*6;
|
|
|
1888 |
for (i = width; i; i--)
|
|
|
1889 |
{
|
|
|
1890 |
png_byte v[8];
|
|
|
1891 |
int j;
|
|
|
1892 |
|
|
|
1893 |
png_memcpy(v, sptr, 3);
|
|
|
1894 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
1895 |
{
|
|
|
1896 |
png_memcpy(dp, v, 3);
|
|
|
1897 |
dp -= 3;
|
|
|
1898 |
}
|
|
|
1899 |
sptr -= 3;
|
|
|
1900 |
}
|
|
|
1901 |
}
|
|
|
1902 |
} /* end of pixel_bytes == 3 */
|
|
|
1903 |
|
|
|
1904 |
//--------------------------------------------------------------
|
|
|
1905 |
else if (pixel_bytes == 1)
|
|
|
1906 |
{
|
|
|
1907 |
if (((pass == 0) || (pass == 1)) && width)
|
|
|
1908 |
{
|
|
|
1909 |
int width_mmx = ((width >> 2) << 2);
|
|
|
1910 |
width -= width_mmx; // 0-3 pixels => 0-3 bytes
|
|
|
1911 |
if (width_mmx)
|
|
|
1912 |
{
|
|
|
1913 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
1914 |
int dummy_value_S;
|
|
|
1915 |
int dummy_value_D;
|
|
|
1916 |
|
|
|
1917 |
__asm__ __volatile__ (
|
|
|
1918 |
"subl $3, %%esi \n\t"
|
|
|
1919 |
"subl $31, %%edi \n\t"
|
|
|
1920 |
|
|
|
1921 |
".loop1_pass0: \n\t"
|
|
|
1922 |
"movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|
|
1923 |
"movq %%mm0, %%mm1 \n\t" // x x x x 3 2 1 0
|
|
|
1924 |
"punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
|
|
|
1925 |
"movq %%mm0, %%mm2 \n\t" // 3 3 2 2 1 1 0 0
|
|
|
1926 |
"punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0
|
|
|
1927 |
"movq %%mm0, %%mm3 \n\t" // 1 1 1 1 0 0 0 0
|
|
|
1928 |
"punpckldq %%mm0, %%mm0 \n\t" // 0 0 0 0 0 0 0 0
|
|
|
1929 |
"punpckhdq %%mm3, %%mm3 \n\t" // 1 1 1 1 1 1 1 1
|
|
|
1930 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
1931 |
"punpckhwd %%mm2, %%mm2 \n\t" // 3 3 3 3 2 2 2 2
|
|
|
1932 |
"movq %%mm3, 8(%%edi) \n\t"
|
|
|
1933 |
"movq %%mm2, %%mm4 \n\t" // 3 3 3 3 2 2 2 2
|
|
|
1934 |
"punpckldq %%mm2, %%mm2 \n\t" // 2 2 2 2 2 2 2 2
|
|
|
1935 |
"punpckhdq %%mm4, %%mm4 \n\t" // 3 3 3 3 3 3 3 3
|
|
|
1936 |
"movq %%mm2, 16(%%edi) \n\t"
|
|
|
1937 |
"subl $4, %%esi \n\t"
|
|
|
1938 |
"movq %%mm4, 24(%%edi) \n\t"
|
|
|
1939 |
"subl $32, %%edi \n\t"
|
|
|
1940 |
"subl $4, %%ecx \n\t"
|
|
|
1941 |
"jnz .loop1_pass0 \n\t"
|
|
|
1942 |
"EMMS \n\t" // DONE
|
|
|
1943 |
|
|
|
1944 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
1945 |
"=S" (dummy_value_S),
|
|
|
1946 |
"=D" (dummy_value_D)
|
|
|
1947 |
|
|
|
1948 |
: "1" (sptr), // esi // input regs
|
|
|
1949 |
"2" (dp), // edi
|
|
|
1950 |
"0" (width_mmx) // ecx
|
|
|
1951 |
|
|
|
1952 |
#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
1953 |
: "%mm0", "%mm1", "%mm2" // clobber list
|
|
|
1954 |
, "%mm3", "%mm4"
|
|
|
1955 |
#endif
|
|
|
1956 |
);
|
|
|
1957 |
}
|
|
|
1958 |
|
|
|
1959 |
sptr -= width_mmx;
|
|
|
1960 |
dp -= width_mmx*8;
|
|
|
1961 |
for (i = width; i; i--)
|
|
|
1962 |
{
|
|
|
1963 |
int j;
|
|
|
1964 |
|
|
|
1965 |
/* I simplified this part in version 1.0.4e
|
|
|
1966 |
* here and in several other instances where
|
|
|
1967 |
* pixel_bytes == 1 -- GR-P
|
|
|
1968 |
*
|
|
|
1969 |
* Original code:
|
|
|
1970 |
*
|
|
|
1971 |
* png_byte v[8];
|
|
|
1972 |
* png_memcpy(v, sptr, pixel_bytes);
|
|
|
1973 |
* for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
1974 |
* {
|
|
|
1975 |
* png_memcpy(dp, v, pixel_bytes);
|
|
|
1976 |
* dp -= pixel_bytes;
|
|
|
1977 |
* }
|
|
|
1978 |
* sptr -= pixel_bytes;
|
|
|
1979 |
*
|
|
|
1980 |
* Replacement code is in the next three lines:
|
|
|
1981 |
*/
|
|
|
1982 |
|
|
|
1983 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
1984 |
{
|
|
|
1985 |
*dp-- = *sptr;
|
|
|
1986 |
}
|
|
|
1987 |
--sptr;
|
|
|
1988 |
}
|
|
|
1989 |
}
|
|
|
1990 |
else if (((pass == 2) || (pass == 3)) && width)
|
|
|
1991 |
{
|
|
|
1992 |
int width_mmx = ((width >> 2) << 2);
|
|
|
1993 |
width -= width_mmx; // 0-3 pixels => 0-3 bytes
|
|
|
1994 |
if (width_mmx)
|
|
|
1995 |
{
|
|
|
1996 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
1997 |
int dummy_value_S;
|
|
|
1998 |
int dummy_value_D;
|
|
|
1999 |
|
|
|
2000 |
__asm__ __volatile__ (
|
|
|
2001 |
"subl $3, %%esi \n\t"
|
|
|
2002 |
"subl $15, %%edi \n\t"
|
|
|
2003 |
|
|
|
2004 |
".loop1_pass2: \n\t"
|
|
|
2005 |
"movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|
|
2006 |
"punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
|
|
|
2007 |
"movq %%mm0, %%mm1 \n\t" // 3 3 2 2 1 1 0 0
|
|
|
2008 |
"punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0
|
|
|
2009 |
"punpckhwd %%mm1, %%mm1 \n\t" // 3 3 3 3 2 2 2 2
|
|
|
2010 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2011 |
"subl $4, %%esi \n\t"
|
|
|
2012 |
"movq %%mm1, 8(%%edi) \n\t"
|
|
|
2013 |
"subl $16, %%edi \n\t"
|
|
|
2014 |
"subl $4, %%ecx \n\t"
|
|
|
2015 |
"jnz .loop1_pass2 \n\t"
|
|
|
2016 |
"EMMS \n\t" // DONE
|
|
|
2017 |
|
|
|
2018 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2019 |
"=S" (dummy_value_S),
|
|
|
2020 |
"=D" (dummy_value_D)
|
|
|
2021 |
|
|
|
2022 |
: "1" (sptr), // esi // input regs
|
|
|
2023 |
"2" (dp), // edi
|
|
|
2024 |
"0" (width_mmx) // ecx
|
|
|
2025 |
|
|
|
2026 |
#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2027 |
: "%mm0", "%mm1" // clobber list
|
|
|
2028 |
#endif
|
|
|
2029 |
);
|
|
|
2030 |
}
|
|
|
2031 |
|
|
|
2032 |
sptr -= width_mmx;
|
|
|
2033 |
dp -= width_mmx*4;
|
|
|
2034 |
for (i = width; i; i--)
|
|
|
2035 |
{
|
|
|
2036 |
int j;
|
|
|
2037 |
|
|
|
2038 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2039 |
{
|
|
|
2040 |
*dp-- = *sptr;
|
|
|
2041 |
}
|
|
|
2042 |
--sptr;
|
|
|
2043 |
}
|
|
|
2044 |
}
|
|
|
2045 |
else if (width) /* && ((pass == 4) || (pass == 5)) */
|
|
|
2046 |
{
|
|
|
2047 |
int width_mmx = ((width >> 3) << 3);
|
|
|
2048 |
width -= width_mmx; // 0-3 pixels => 0-3 bytes
|
|
|
2049 |
if (width_mmx)
|
|
|
2050 |
{
|
|
|
2051 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2052 |
int dummy_value_S;
|
|
|
2053 |
int dummy_value_D;
|
|
|
2054 |
|
|
|
2055 |
__asm__ __volatile__ (
|
|
|
2056 |
"subl $7, %%esi \n\t"
|
|
|
2057 |
"subl $15, %%edi \n\t"
|
|
|
2058 |
|
|
|
2059 |
".loop1_pass4: \n\t"
|
|
|
2060 |
"movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2061 |
"movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2062 |
"punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
|
|
|
2063 |
"punpckhbw %%mm1, %%mm1 \n\t" // 7 7 6 6 5 5 4 4
|
|
|
2064 |
"movq %%mm1, 8(%%edi) \n\t"
|
|
|
2065 |
"subl $8, %%esi \n\t"
|
|
|
2066 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2067 |
"subl $16, %%edi \n\t"
|
|
|
2068 |
"subl $8, %%ecx \n\t"
|
|
|
2069 |
"jnz .loop1_pass4 \n\t"
|
|
|
2070 |
"EMMS \n\t" // DONE
|
|
|
2071 |
|
|
|
2072 |
: "=c" (dummy_value_c), // output regs (none)
|
|
|
2073 |
"=S" (dummy_value_S),
|
|
|
2074 |
"=D" (dummy_value_D)
|
|
|
2075 |
|
|
|
2076 |
: "1" (sptr), // esi // input regs
|
|
|
2077 |
"2" (dp), // edi
|
|
|
2078 |
"0" (width_mmx) // ecx
|
|
|
2079 |
|
|
|
2080 |
#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2081 |
: "%mm0", "%mm1" // clobber list
|
|
|
2082 |
#endif
|
|
|
2083 |
);
|
|
|
2084 |
}
|
|
|
2085 |
|
|
|
2086 |
sptr -= width_mmx;
|
|
|
2087 |
dp -= width_mmx*2;
|
|
|
2088 |
for (i = width; i; i--)
|
|
|
2089 |
{
|
|
|
2090 |
int j;
|
|
|
2091 |
|
|
|
2092 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2093 |
{
|
|
|
2094 |
*dp-- = *sptr;
|
|
|
2095 |
}
|
|
|
2096 |
--sptr;
|
|
|
2097 |
}
|
|
|
2098 |
}
|
|
|
2099 |
} /* end of pixel_bytes == 1 */
|
|
|
2100 |
|
|
|
2101 |
//--------------------------------------------------------------
|
|
|
2102 |
else if (pixel_bytes == 2)
|
|
|
2103 |
{
|
|
|
2104 |
if (((pass == 0) || (pass == 1)) && width)
|
|
|
2105 |
{
|
|
|
2106 |
int width_mmx = ((width >> 1) << 1);
|
|
|
2107 |
width -= width_mmx; // 0,1 pixels => 0,2 bytes
|
|
|
2108 |
if (width_mmx)
|
|
|
2109 |
{
|
|
|
2110 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2111 |
int dummy_value_S;
|
|
|
2112 |
int dummy_value_D;
|
|
|
2113 |
|
|
|
2114 |
__asm__ __volatile__ (
|
|
|
2115 |
"subl $2, %%esi \n\t"
|
|
|
2116 |
"subl $30, %%edi \n\t"
|
|
|
2117 |
|
|
|
2118 |
".loop2_pass0: \n\t"
|
|
|
2119 |
"movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|
|
2120 |
"punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
|
|
|
2121 |
"movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0
|
|
|
2122 |
"punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0
|
|
|
2123 |
"punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2
|
|
|
2124 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2125 |
"movq %%mm0, 8(%%edi) \n\t"
|
|
|
2126 |
"movq %%mm1, 16(%%edi) \n\t"
|
|
|
2127 |
"subl $4, %%esi \n\t"
|
|
|
2128 |
"movq %%mm1, 24(%%edi) \n\t"
|
|
|
2129 |
"subl $32, %%edi \n\t"
|
|
|
2130 |
"subl $2, %%ecx \n\t"
|
|
|
2131 |
"jnz .loop2_pass0 \n\t"
|
|
|
2132 |
"EMMS \n\t" // DONE
|
|
|
2133 |
|
|
|
2134 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2135 |
"=S" (dummy_value_S),
|
|
|
2136 |
"=D" (dummy_value_D)
|
|
|
2137 |
|
|
|
2138 |
: "1" (sptr), // esi // input regs
|
|
|
2139 |
"2" (dp), // edi
|
|
|
2140 |
"0" (width_mmx) // ecx
|
|
|
2141 |
|
|
|
2142 |
#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2143 |
: "%mm0", "%mm1" // clobber list
|
|
|
2144 |
#endif
|
|
|
2145 |
);
|
|
|
2146 |
}
|
|
|
2147 |
|
|
|
2148 |
sptr -= (width_mmx*2 - 2); // sign fixed
|
|
|
2149 |
dp -= (width_mmx*16 - 2); // sign fixed
|
|
|
2150 |
for (i = width; i; i--)
|
|
|
2151 |
{
|
|
|
2152 |
png_byte v[8];
|
|
|
2153 |
int j;
|
|
|
2154 |
sptr -= 2;
|
|
|
2155 |
png_memcpy(v, sptr, 2);
|
|
|
2156 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2157 |
{
|
|
|
2158 |
dp -= 2;
|
|
|
2159 |
png_memcpy(dp, v, 2);
|
|
|
2160 |
}
|
|
|
2161 |
}
|
|
|
2162 |
}
|
|
|
2163 |
else if (((pass == 2) || (pass == 3)) && width)
|
|
|
2164 |
{
|
|
|
2165 |
int width_mmx = ((width >> 1) << 1) ;
|
|
|
2166 |
width -= width_mmx; // 0,1 pixels => 0,2 bytes
|
|
|
2167 |
if (width_mmx)
|
|
|
2168 |
{
|
|
|
2169 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2170 |
int dummy_value_S;
|
|
|
2171 |
int dummy_value_D;
|
|
|
2172 |
|
|
|
2173 |
__asm__ __volatile__ (
|
|
|
2174 |
"subl $2, %%esi \n\t"
|
|
|
2175 |
"subl $14, %%edi \n\t"
|
|
|
2176 |
|
|
|
2177 |
".loop2_pass2: \n\t"
|
|
|
2178 |
"movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|
|
2179 |
"punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
|
|
|
2180 |
"movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0
|
|
|
2181 |
"punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0
|
|
|
2182 |
"punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2
|
|
|
2183 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2184 |
"subl $4, %%esi \n\t"
|
|
|
2185 |
"movq %%mm1, 8(%%edi) \n\t"
|
|
|
2186 |
"subl $16, %%edi \n\t"
|
|
|
2187 |
"subl $2, %%ecx \n\t"
|
|
|
2188 |
"jnz .loop2_pass2 \n\t"
|
|
|
2189 |
"EMMS \n\t" // DONE
|
|
|
2190 |
|
|
|
2191 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2192 |
"=S" (dummy_value_S),
|
|
|
2193 |
"=D" (dummy_value_D)
|
|
|
2194 |
|
|
|
2195 |
: "1" (sptr), // esi // input regs
|
|
|
2196 |
"2" (dp), // edi
|
|
|
2197 |
"0" (width_mmx) // ecx
|
|
|
2198 |
|
|
|
2199 |
#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2200 |
: "%mm0", "%mm1" // clobber list
|
|
|
2201 |
#endif
|
|
|
2202 |
);
|
|
|
2203 |
}
|
|
|
2204 |
|
|
|
2205 |
sptr -= (width_mmx*2 - 2); // sign fixed
|
|
|
2206 |
dp -= (width_mmx*8 - 2); // sign fixed
|
|
|
2207 |
for (i = width; i; i--)
|
|
|
2208 |
{
|
|
|
2209 |
png_byte v[8];
|
|
|
2210 |
int j;
|
|
|
2211 |
sptr -= 2;
|
|
|
2212 |
png_memcpy(v, sptr, 2);
|
|
|
2213 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2214 |
{
|
|
|
2215 |
dp -= 2;
|
|
|
2216 |
png_memcpy(dp, v, 2);
|
|
|
2217 |
}
|
|
|
2218 |
}
|
|
|
2219 |
}
|
|
|
2220 |
else if (width) // pass == 4 or 5
|
|
|
2221 |
{
|
|
|
2222 |
int width_mmx = ((width >> 1) << 1) ;
|
|
|
2223 |
width -= width_mmx; // 0,1 pixels => 0,2 bytes
|
|
|
2224 |
if (width_mmx)
|
|
|
2225 |
{
|
|
|
2226 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2227 |
int dummy_value_S;
|
|
|
2228 |
int dummy_value_D;
|
|
|
2229 |
|
|
|
2230 |
__asm__ __volatile__ (
|
|
|
2231 |
"subl $2, %%esi \n\t"
|
|
|
2232 |
"subl $6, %%edi \n\t"
|
|
|
2233 |
|
|
|
2234 |
".loop2_pass4: \n\t"
|
|
|
2235 |
"movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|
|
2236 |
"punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
|
|
|
2237 |
"subl $4, %%esi \n\t"
|
|
|
2238 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2239 |
"subl $8, %%edi \n\t"
|
|
|
2240 |
"subl $2, %%ecx \n\t"
|
|
|
2241 |
"jnz .loop2_pass4 \n\t"
|
|
|
2242 |
"EMMS \n\t" // DONE
|
|
|
2243 |
|
|
|
2244 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2245 |
"=S" (dummy_value_S),
|
|
|
2246 |
"=D" (dummy_value_D)
|
|
|
2247 |
|
|
|
2248 |
: "1" (sptr), // esi // input regs
|
|
|
2249 |
"2" (dp), // edi
|
|
|
2250 |
"0" (width_mmx) // ecx
|
|
|
2251 |
|
|
|
2252 |
#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2253 |
: "%mm0" // clobber list
|
|
|
2254 |
#endif
|
|
|
2255 |
);
|
|
|
2256 |
}
|
|
|
2257 |
|
|
|
2258 |
sptr -= (width_mmx*2 - 2); // sign fixed
|
|
|
2259 |
dp -= (width_mmx*4 - 2); // sign fixed
|
|
|
2260 |
for (i = width; i; i--)
|
|
|
2261 |
{
|
|
|
2262 |
png_byte v[8];
|
|
|
2263 |
int j;
|
|
|
2264 |
sptr -= 2;
|
|
|
2265 |
png_memcpy(v, sptr, 2);
|
|
|
2266 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2267 |
{
|
|
|
2268 |
dp -= 2;
|
|
|
2269 |
png_memcpy(dp, v, 2);
|
|
|
2270 |
}
|
|
|
2271 |
}
|
|
|
2272 |
}
|
|
|
2273 |
} /* end of pixel_bytes == 2 */
|
|
|
2274 |
|
|
|
2275 |
//--------------------------------------------------------------
|
|
|
2276 |
else if (pixel_bytes == 4)
|
|
|
2277 |
{
|
|
|
2278 |
if (((pass == 0) || (pass == 1)) && width)
|
|
|
2279 |
{
|
|
|
2280 |
int width_mmx = ((width >> 1) << 1);
|
|
|
2281 |
width -= width_mmx; // 0,1 pixels => 0,4 bytes
|
|
|
2282 |
if (width_mmx)
|
|
|
2283 |
{
|
|
|
2284 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2285 |
int dummy_value_S;
|
|
|
2286 |
int dummy_value_D;
|
|
|
2287 |
|
|
|
2288 |
__asm__ __volatile__ (
|
|
|
2289 |
"subl $4, %%esi \n\t"
|
|
|
2290 |
"subl $60, %%edi \n\t"
|
|
|
2291 |
|
|
|
2292 |
".loop4_pass0: \n\t"
|
|
|
2293 |
"movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2294 |
"movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2295 |
"punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
|
|
|
2296 |
"punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
|
|
|
2297 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2298 |
"movq %%mm0, 8(%%edi) \n\t"
|
|
|
2299 |
"movq %%mm0, 16(%%edi) \n\t"
|
|
|
2300 |
"movq %%mm0, 24(%%edi) \n\t"
|
|
|
2301 |
"movq %%mm1, 32(%%edi) \n\t"
|
|
|
2302 |
"movq %%mm1, 40(%%edi) \n\t"
|
|
|
2303 |
"movq %%mm1, 48(%%edi) \n\t"
|
|
|
2304 |
"subl $8, %%esi \n\t"
|
|
|
2305 |
"movq %%mm1, 56(%%edi) \n\t"
|
|
|
2306 |
"subl $64, %%edi \n\t"
|
|
|
2307 |
"subl $2, %%ecx \n\t"
|
|
|
2308 |
"jnz .loop4_pass0 \n\t"
|
|
|
2309 |
"EMMS \n\t" // DONE
|
|
|
2310 |
|
|
|
2311 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2312 |
"=S" (dummy_value_S),
|
|
|
2313 |
"=D" (dummy_value_D)
|
|
|
2314 |
|
|
|
2315 |
: "1" (sptr), // esi // input regs
|
|
|
2316 |
"2" (dp), // edi
|
|
|
2317 |
"0" (width_mmx) // ecx
|
|
|
2318 |
|
|
|
2319 |
#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2320 |
: "%mm0", "%mm1" // clobber list
|
|
|
2321 |
#endif
|
|
|
2322 |
);
|
|
|
2323 |
}
|
|
|
2324 |
|
|
|
2325 |
sptr -= (width_mmx*4 - 4); // sign fixed
|
|
|
2326 |
dp -= (width_mmx*32 - 4); // sign fixed
|
|
|
2327 |
for (i = width; i; i--)
|
|
|
2328 |
{
|
|
|
2329 |
png_byte v[8];
|
|
|
2330 |
int j;
|
|
|
2331 |
sptr -= 4;
|
|
|
2332 |
png_memcpy(v, sptr, 4);
|
|
|
2333 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2334 |
{
|
|
|
2335 |
dp -= 4;
|
|
|
2336 |
png_memcpy(dp, v, 4);
|
|
|
2337 |
}
|
|
|
2338 |
}
|
|
|
2339 |
}
|
|
|
2340 |
else if (((pass == 2) || (pass == 3)) && width)
|
|
|
2341 |
{
|
|
|
2342 |
int width_mmx = ((width >> 1) << 1);
|
|
|
2343 |
width -= width_mmx; // 0,1 pixels => 0,4 bytes
|
|
|
2344 |
if (width_mmx)
|
|
|
2345 |
{
|
|
|
2346 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2347 |
int dummy_value_S;
|
|
|
2348 |
int dummy_value_D;
|
|
|
2349 |
|
|
|
2350 |
__asm__ __volatile__ (
|
|
|
2351 |
"subl $4, %%esi \n\t"
|
|
|
2352 |
"subl $28, %%edi \n\t"
|
|
|
2353 |
|
|
|
2354 |
".loop4_pass2: \n\t"
|
|
|
2355 |
"movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2356 |
"movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2357 |
"punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
|
|
|
2358 |
"punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
|
|
|
2359 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2360 |
"movq %%mm0, 8(%%edi) \n\t"
|
|
|
2361 |
"movq %%mm1, 16(%%edi) \n\t"
|
|
|
2362 |
"movq %%mm1, 24(%%edi) \n\t"
|
|
|
2363 |
"subl $8, %%esi \n\t"
|
|
|
2364 |
"subl $32, %%edi \n\t"
|
|
|
2365 |
"subl $2, %%ecx \n\t"
|
|
|
2366 |
"jnz .loop4_pass2 \n\t"
|
|
|
2367 |
"EMMS \n\t" // DONE
|
|
|
2368 |
|
|
|
2369 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2370 |
"=S" (dummy_value_S),
|
|
|
2371 |
"=D" (dummy_value_D)
|
|
|
2372 |
|
|
|
2373 |
: "1" (sptr), // esi // input regs
|
|
|
2374 |
"2" (dp), // edi
|
|
|
2375 |
"0" (width_mmx) // ecx
|
|
|
2376 |
|
|
|
2377 |
#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2378 |
: "%mm0", "%mm1" // clobber list
|
|
|
2379 |
#endif
|
|
|
2380 |
);
|
|
|
2381 |
}
|
|
|
2382 |
|
|
|
2383 |
sptr -= (width_mmx*4 - 4); // sign fixed
|
|
|
2384 |
dp -= (width_mmx*16 - 4); // sign fixed
|
|
|
2385 |
for (i = width; i; i--)
|
|
|
2386 |
{
|
|
|
2387 |
png_byte v[8];
|
|
|
2388 |
int j;
|
|
|
2389 |
sptr -= 4;
|
|
|
2390 |
png_memcpy(v, sptr, 4);
|
|
|
2391 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2392 |
{
|
|
|
2393 |
dp -= 4;
|
|
|
2394 |
png_memcpy(dp, v, 4);
|
|
|
2395 |
}
|
|
|
2396 |
}
|
|
|
2397 |
}
|
|
|
2398 |
else if (width) // pass == 4 or 5
|
|
|
2399 |
{
|
|
|
2400 |
int width_mmx = ((width >> 1) << 1) ;
|
|
|
2401 |
width -= width_mmx; // 0,1 pixels => 0,4 bytes
|
|
|
2402 |
if (width_mmx)
|
|
|
2403 |
{
|
|
|
2404 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2405 |
int dummy_value_S;
|
|
|
2406 |
int dummy_value_D;
|
|
|
2407 |
|
|
|
2408 |
__asm__ __volatile__ (
|
|
|
2409 |
"subl $4, %%esi \n\t"
|
|
|
2410 |
"subl $12, %%edi \n\t"
|
|
|
2411 |
|
|
|
2412 |
".loop4_pass4: \n\t"
|
|
|
2413 |
"movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2414 |
"movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2415 |
"punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
|
|
|
2416 |
"punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
|
|
|
2417 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2418 |
"subl $8, %%esi \n\t"
|
|
|
2419 |
"movq %%mm1, 8(%%edi) \n\t"
|
|
|
2420 |
"subl $16, %%edi \n\t"
|
|
|
2421 |
"subl $2, %%ecx \n\t"
|
|
|
2422 |
"jnz .loop4_pass4 \n\t"
|
|
|
2423 |
"EMMS \n\t" // DONE
|
|
|
2424 |
|
|
|
2425 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2426 |
"=S" (dummy_value_S),
|
|
|
2427 |
"=D" (dummy_value_D)
|
|
|
2428 |
|
|
|
2429 |
: "1" (sptr), // esi // input regs
|
|
|
2430 |
"2" (dp), // edi
|
|
|
2431 |
"0" (width_mmx) // ecx
|
|
|
2432 |
|
|
|
2433 |
#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2434 |
: "%mm0", "%mm1" // clobber list
|
|
|
2435 |
#endif
|
|
|
2436 |
);
|
|
|
2437 |
}
|
|
|
2438 |
|
|
|
2439 |
sptr -= (width_mmx*4 - 4); // sign fixed
|
|
|
2440 |
dp -= (width_mmx*8 - 4); // sign fixed
|
|
|
2441 |
for (i = width; i; i--)
|
|
|
2442 |
{
|
|
|
2443 |
png_byte v[8];
|
|
|
2444 |
int j;
|
|
|
2445 |
sptr -= 4;
|
|
|
2446 |
png_memcpy(v, sptr, 4);
|
|
|
2447 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2448 |
{
|
|
|
2449 |
dp -= 4;
|
|
|
2450 |
png_memcpy(dp, v, 4);
|
|
|
2451 |
}
|
|
|
2452 |
}
|
|
|
2453 |
}
|
|
|
2454 |
} /* end of pixel_bytes == 4 */
|
|
|
2455 |
|
|
|
2456 |
//--------------------------------------------------------------
|
|
|
2457 |
else if (pixel_bytes == 8)
|
|
|
2458 |
{
|
|
|
2459 |
// GRR TEST: should work, but needs testing (special 64-bit version of rpng2?)
|
|
|
2460 |
// GRR NOTE: no need to combine passes here!
|
|
|
2461 |
if (((pass == 0) || (pass == 1)) && width)
|
|
|
2462 |
{
|
|
|
2463 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2464 |
int dummy_value_S;
|
|
|
2465 |
int dummy_value_D;
|
|
|
2466 |
|
|
|
2467 |
// source is 8-byte RRGGBBAA
|
|
|
2468 |
// dest is 64-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA ...
|
|
|
2469 |
__asm__ __volatile__ (
|
|
|
2470 |
"subl $56, %%edi \n\t" // start of last block
|
|
|
2471 |
|
|
|
2472 |
".loop8_pass0: \n\t"
|
|
|
2473 |
"movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2474 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2475 |
"movq %%mm0, 8(%%edi) \n\t"
|
|
|
2476 |
"movq %%mm0, 16(%%edi) \n\t"
|
|
|
2477 |
"movq %%mm0, 24(%%edi) \n\t"
|
|
|
2478 |
"movq %%mm0, 32(%%edi) \n\t"
|
|
|
2479 |
"movq %%mm0, 40(%%edi) \n\t"
|
|
|
2480 |
"movq %%mm0, 48(%%edi) \n\t"
|
|
|
2481 |
"subl $8, %%esi \n\t"
|
|
|
2482 |
"movq %%mm0, 56(%%edi) \n\t"
|
|
|
2483 |
"subl $64, %%edi \n\t"
|
|
|
2484 |
"decl %%ecx \n\t"
|
|
|
2485 |
"jnz .loop8_pass0 \n\t"
|
|
|
2486 |
"EMMS \n\t" // DONE
|
|
|
2487 |
|
|
|
2488 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2489 |
"=S" (dummy_value_S),
|
|
|
2490 |
"=D" (dummy_value_D)
|
|
|
2491 |
|
|
|
2492 |
: "1" (sptr), // esi // input regs
|
|
|
2493 |
"2" (dp), // edi
|
|
|
2494 |
"0" (width) // ecx
|
|
|
2495 |
|
|
|
2496 |
#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2497 |
: "%mm0" // clobber list
|
|
|
2498 |
#endif
|
|
|
2499 |
);
|
|
|
2500 |
}
|
|
|
2501 |
else if (((pass == 2) || (pass == 3)) && width)
|
|
|
2502 |
{
|
|
|
2503 |
// source is 8-byte RRGGBBAA
|
|
|
2504 |
// dest is 32-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA
|
|
|
2505 |
// (recall that expansion is _in place_: sptr and dp
|
|
|
2506 |
// both point at locations within same row buffer)
|
|
|
2507 |
{
|
|
|
2508 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2509 |
int dummy_value_S;
|
|
|
2510 |
int dummy_value_D;
|
|
|
2511 |
|
|
|
2512 |
__asm__ __volatile__ (
|
|
|
2513 |
"subl $24, %%edi \n\t" // start of last block
|
|
|
2514 |
|
|
|
2515 |
".loop8_pass2: \n\t"
|
|
|
2516 |
"movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2517 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2518 |
"movq %%mm0, 8(%%edi) \n\t"
|
|
|
2519 |
"movq %%mm0, 16(%%edi) \n\t"
|
|
|
2520 |
"subl $8, %%esi \n\t"
|
|
|
2521 |
"movq %%mm0, 24(%%edi) \n\t"
|
|
|
2522 |
"subl $32, %%edi \n\t"
|
|
|
2523 |
"decl %%ecx \n\t"
|
|
|
2524 |
"jnz .loop8_pass2 \n\t"
|
|
|
2525 |
"EMMS \n\t" // DONE
|
|
|
2526 |
|
|
|
2527 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2528 |
"=S" (dummy_value_S),
|
|
|
2529 |
"=D" (dummy_value_D)
|
|
|
2530 |
|
|
|
2531 |
: "1" (sptr), // esi // input regs
|
|
|
2532 |
"2" (dp), // edi
|
|
|
2533 |
"0" (width) // ecx
|
|
|
2534 |
|
|
|
2535 |
#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2536 |
: "%mm0" // clobber list
|
|
|
2537 |
#endif
|
|
|
2538 |
);
|
|
|
2539 |
}
|
|
|
2540 |
}
|
|
|
2541 |
else if (width) // pass == 4 or 5
|
|
|
2542 |
{
|
|
|
2543 |
// source is 8-byte RRGGBBAA
|
|
|
2544 |
// dest is 16-byte RRGGBBAA RRGGBBAA
|
|
|
2545 |
{
|
|
|
2546 |
int dummy_value_c; // fix 'forbidden register spilled'
|
|
|
2547 |
int dummy_value_S;
|
|
|
2548 |
int dummy_value_D;
|
|
|
2549 |
|
|
|
2550 |
__asm__ __volatile__ (
|
|
|
2551 |
"subl $8, %%edi \n\t" // start of last block
|
|
|
2552 |
|
|
|
2553 |
".loop8_pass4: \n\t"
|
|
|
2554 |
"movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|
|
2555 |
"movq %%mm0, (%%edi) \n\t"
|
|
|
2556 |
"subl $8, %%esi \n\t"
|
|
|
2557 |
"movq %%mm0, 8(%%edi) \n\t"
|
|
|
2558 |
"subl $16, %%edi \n\t"
|
|
|
2559 |
"decl %%ecx \n\t"
|
|
|
2560 |
"jnz .loop8_pass4 \n\t"
|
|
|
2561 |
"EMMS \n\t" // DONE
|
|
|
2562 |
|
|
|
2563 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2564 |
"=S" (dummy_value_S),
|
|
|
2565 |
"=D" (dummy_value_D)
|
|
|
2566 |
|
|
|
2567 |
: "1" (sptr), // esi // input regs
|
|
|
2568 |
"2" (dp), // edi
|
|
|
2569 |
"0" (width) // ecx
|
|
|
2570 |
|
|
|
2571 |
#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2572 |
: "%mm0" // clobber list
|
|
|
2573 |
#endif
|
|
|
2574 |
);
|
|
|
2575 |
}
|
|
|
2576 |
}
|
|
|
2577 |
|
|
|
2578 |
} /* end of pixel_bytes == 8 */
|
|
|
2579 |
|
|
|
2580 |
//--------------------------------------------------------------
|
|
|
2581 |
else if (pixel_bytes == 6)
|
|
|
2582 |
{
|
|
|
2583 |
for (i = width; i; i--)
|
|
|
2584 |
{
|
|
|
2585 |
png_byte v[8];
|
|
|
2586 |
int j;
|
|
|
2587 |
png_memcpy(v, sptr, 6);
|
|
|
2588 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2589 |
{
|
|
|
2590 |
png_memcpy(dp, v, 6);
|
|
|
2591 |
dp -= 6;
|
|
|
2592 |
}
|
|
|
2593 |
sptr -= 6;
|
|
|
2594 |
}
|
|
|
2595 |
} /* end of pixel_bytes == 6 */
|
|
|
2596 |
|
|
|
2597 |
//--------------------------------------------------------------
|
|
|
2598 |
else
|
|
|
2599 |
{
|
|
|
2600 |
for (i = width; i; i--)
|
|
|
2601 |
{
|
|
|
2602 |
png_byte v[8];
|
|
|
2603 |
int j;
|
|
|
2604 |
png_memcpy(v, sptr, pixel_bytes);
|
|
|
2605 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2606 |
{
|
|
|
2607 |
png_memcpy(dp, v, pixel_bytes);
|
|
|
2608 |
dp -= pixel_bytes;
|
|
|
2609 |
}
|
|
|
2610 |
sptr-= pixel_bytes;
|
|
|
2611 |
}
|
|
|
2612 |
}
|
|
|
2613 |
} // end of _mmx_supported ========================================
|
|
|
2614 |
|
|
|
2615 |
else /* MMX not supported: use modified C code - takes advantage
|
|
|
2616 |
* of inlining of png_memcpy for a constant */
|
|
|
2617 |
/* GRR 19991007: does it? or should pixel_bytes in each
|
|
|
2618 |
* block be replaced with immediate value (e.g., 1)? */
|
|
|
2619 |
/* GRR 19991017: replaced with constants in each case */
|
|
|
2620 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
2621 |
{
|
|
|
2622 |
if (pixel_bytes == 1)
|
|
|
2623 |
{
|
|
|
2624 |
for (i = width; i; i--)
|
|
|
2625 |
{
|
|
|
2626 |
int j;
|
|
|
2627 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2628 |
{
|
|
|
2629 |
*dp-- = *sptr;
|
|
|
2630 |
}
|
|
|
2631 |
--sptr;
|
|
|
2632 |
}
|
|
|
2633 |
}
|
|
|
2634 |
else if (pixel_bytes == 3)
|
|
|
2635 |
{
|
|
|
2636 |
for (i = width; i; i--)
|
|
|
2637 |
{
|
|
|
2638 |
png_byte v[8];
|
|
|
2639 |
int j;
|
|
|
2640 |
png_memcpy(v, sptr, 3);
|
|
|
2641 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2642 |
{
|
|
|
2643 |
png_memcpy(dp, v, 3);
|
|
|
2644 |
dp -= 3;
|
|
|
2645 |
}
|
|
|
2646 |
sptr -= 3;
|
|
|
2647 |
}
|
|
|
2648 |
}
|
|
|
2649 |
else if (pixel_bytes == 2)
|
|
|
2650 |
{
|
|
|
2651 |
for (i = width; i; i--)
|
|
|
2652 |
{
|
|
|
2653 |
png_byte v[8];
|
|
|
2654 |
int j;
|
|
|
2655 |
png_memcpy(v, sptr, 2);
|
|
|
2656 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2657 |
{
|
|
|
2658 |
png_memcpy(dp, v, 2);
|
|
|
2659 |
dp -= 2;
|
|
|
2660 |
}
|
|
|
2661 |
sptr -= 2;
|
|
|
2662 |
}
|
|
|
2663 |
}
|
|
|
2664 |
else if (pixel_bytes == 4)
|
|
|
2665 |
{
|
|
|
2666 |
for (i = width; i; i--)
|
|
|
2667 |
{
|
|
|
2668 |
png_byte v[8];
|
|
|
2669 |
int j;
|
|
|
2670 |
png_memcpy(v, sptr, 4);
|
|
|
2671 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2672 |
{
|
|
|
2673 |
#ifdef PNG_DEBUG
|
|
|
2674 |
if (dp < row || dp+3 > row+png_ptr->row_buf_size)
|
|
|
2675 |
{
|
|
|
2676 |
printf("dp out of bounds: row=%d, dp=%d, rp=%d\n",
|
|
|
2677 |
row, dp, row+png_ptr->row_buf_size);
|
|
|
2678 |
printf("row_buf=%d\n",png_ptr->row_buf_size);
|
|
|
2679 |
}
|
|
|
2680 |
#endif
|
|
|
2681 |
png_memcpy(dp, v, 4);
|
|
|
2682 |
dp -= 4;
|
|
|
2683 |
}
|
|
|
2684 |
sptr -= 4;
|
|
|
2685 |
}
|
|
|
2686 |
}
|
|
|
2687 |
else if (pixel_bytes == 6)
|
|
|
2688 |
{
|
|
|
2689 |
for (i = width; i; i--)
|
|
|
2690 |
{
|
|
|
2691 |
png_byte v[8];
|
|
|
2692 |
int j;
|
|
|
2693 |
png_memcpy(v, sptr, 6);
|
|
|
2694 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2695 |
{
|
|
|
2696 |
png_memcpy(dp, v, 6);
|
|
|
2697 |
dp -= 6;
|
|
|
2698 |
}
|
|
|
2699 |
sptr -= 6;
|
|
|
2700 |
}
|
|
|
2701 |
}
|
|
|
2702 |
else if (pixel_bytes == 8)
|
|
|
2703 |
{
|
|
|
2704 |
for (i = width; i; i--)
|
|
|
2705 |
{
|
|
|
2706 |
png_byte v[8];
|
|
|
2707 |
int j;
|
|
|
2708 |
png_memcpy(v, sptr, 8);
|
|
|
2709 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2710 |
{
|
|
|
2711 |
png_memcpy(dp, v, 8);
|
|
|
2712 |
dp -= 8;
|
|
|
2713 |
}
|
|
|
2714 |
sptr -= 8;
|
|
|
2715 |
}
|
|
|
2716 |
}
|
|
|
2717 |
else /* GRR: should never be reached */
|
|
|
2718 |
{
|
|
|
2719 |
for (i = width; i; i--)
|
|
|
2720 |
{
|
|
|
2721 |
png_byte v[8];
|
|
|
2722 |
int j;
|
|
|
2723 |
png_memcpy(v, sptr, pixel_bytes);
|
|
|
2724 |
for (j = 0; j < png_pass_inc[pass]; j++)
|
|
|
2725 |
{
|
|
|
2726 |
png_memcpy(dp, v, pixel_bytes);
|
|
|
2727 |
dp -= pixel_bytes;
|
|
|
2728 |
}
|
|
|
2729 |
sptr -= pixel_bytes;
|
|
|
2730 |
}
|
|
|
2731 |
}
|
|
|
2732 |
|
|
|
2733 |
} /* end if (MMX not supported) */
|
|
|
2734 |
break;
|
|
|
2735 |
}
|
|
|
2736 |
} /* end switch (row_info->pixel_depth) */
|
|
|
2737 |
|
|
|
2738 |
row_info->width = final_width;
|
|
|
2739 |
|
|
|
2740 |
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,final_width);
|
|
|
2741 |
}
|
|
|
2742 |
|
|
|
2743 |
} /* end png_do_read_interlace() */
|
|
|
2744 |
|
|
|
2745 |
#endif /* PNG_HAVE_ASSEMBLER_READ_INTERLACE */
|
|
|
2746 |
#endif /* PNG_READ_INTERLACING_SUPPORTED */
|
|
|
2747 |
|
|
|
2748 |
|
|
|
2749 |
|
|
|
2750 |
#if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW)
|
|
|
2751 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|
|
2752 |
|
|
|
2753 |
// These variables are utilized in the functions below. They are declared
|
|
|
2754 |
// globally here to ensure alignment on 8-byte boundaries.
|
|
|
2755 |
|
|
|
2756 |
union uAll {
|
|
|
2757 |
long long use;
|
|
|
2758 |
double align;
|
|
|
2759 |
} _LBCarryMask = {0x0101010101010101LL},
|
|
|
2760 |
_HBClearMask = {0x7f7f7f7f7f7f7f7fLL},
|
|
|
2761 |
_ActiveMask, _ActiveMask2, _ActiveMaskEnd, _ShiftBpp, _ShiftRem;
|
|
|
2762 |
|
|
|
2763 |
#ifdef PNG_THREAD_UNSAFE_OK
|
|
|
2764 |
//===========================================================================//
|
|
|
2765 |
// //
|
|
|
2766 |
// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G //
|
|
|
2767 |
// //
|
|
|
2768 |
//===========================================================================//
|
|
|
2769 |
|
|
|
2770 |
// Optimized code for PNG Average filter decoder
|
|
|
2771 |
|
|
|
2772 |
static void /* PRIVATE */
|
|
|
2773 |
png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
|
|
|
2774 |
png_bytep prev_row)
|
|
|
2775 |
{
|
|
|
2776 |
int bpp;
|
|
|
2777 |
int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error
|
|
|
2778 |
int dummy_value_S;
|
|
|
2779 |
int dummy_value_D;
|
|
|
2780 |
|
|
|
2781 |
bpp = (row_info->pixel_depth + 7) >> 3; // get # bytes per pixel
|
|
|
2782 |
_FullLength = row_info->rowbytes; // # of bytes to filter
|
|
|
2783 |
|
|
|
2784 |
__asm__ __volatile__ (
|
|
|
2785 |
// initialize address pointers and offset
|
|
|
2786 |
#ifdef __PIC__
|
|
|
2787 |
"pushl %%ebx \n\t" // save index to Global Offset Table
|
|
|
2788 |
#endif
|
|
|
2789 |
//pre "movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
2790 |
"xorl %%ebx, %%ebx \n\t" // ebx: x
|
|
|
2791 |
"movl %%edi, %%edx \n\t"
|
|
|
2792 |
//pre "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
2793 |
//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|
|
2794 |
"subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
|
|
|
2795 |
|
|
|
2796 |
"xorl %%eax,%%eax \n\t"
|
|
|
2797 |
|
|
|
2798 |
// Compute the Raw value for the first bpp bytes
|
|
|
2799 |
// Raw(x) = Avg(x) + (Prior(x)/2)
|
|
|
2800 |
"avg_rlp: \n\t"
|
|
|
2801 |
"movb (%%esi,%%ebx,),%%al \n\t" // load al with Prior(x)
|
|
|
2802 |
"incl %%ebx \n\t"
|
|
|
2803 |
"shrb %%al \n\t" // divide by 2
|
|
|
2804 |
"addb -1(%%edi,%%ebx,),%%al \n\t" // add Avg(x); -1 to offset inc ebx
|
|
|
2805 |
//pre "cmpl bpp, %%ebx \n\t" // (bpp is preloaded into ecx)
|
|
|
2806 |
"cmpl %%ecx, %%ebx \n\t"
|
|
|
2807 |
"movb %%al,-1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx
|
|
|
2808 |
"jb avg_rlp \n\t" // mov does not affect flags
|
|
|
2809 |
|
|
|
2810 |
// get # of bytes to alignment
|
|
|
2811 |
"movl %%edi, _dif \n\t" // take start of row
|
|
|
2812 |
"addl %%ebx, _dif \n\t" // add bpp
|
|
|
2813 |
"addl $0xf, _dif \n\t" // add 7+8 to incr past alignment bdry
|
|
|
2814 |
"andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
|
|
|
2815 |
"subl %%edi, _dif \n\t" // subtract from start => value ebx at
|
|
|
2816 |
"jz avg_go \n\t" // alignment
|
|
|
2817 |
|
|
|
2818 |
// fix alignment
|
|
|
2819 |
// Compute the Raw value for the bytes up to the alignment boundary
|
|
|
2820 |
// Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
|
|
|
2821 |
"xorl %%ecx, %%ecx \n\t"
|
|
|
2822 |
|
|
|
2823 |
"avg_lp1: \n\t"
|
|
|
2824 |
"xorl %%eax, %%eax \n\t"
|
|
|
2825 |
"movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
|
|
|
2826 |
"movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
|
|
|
2827 |
"addw %%cx, %%ax \n\t"
|
|
|
2828 |
"incl %%ebx \n\t"
|
|
|
2829 |
"shrw %%ax \n\t" // divide by 2
|
|
|
2830 |
"addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx
|
|
|
2831 |
"cmpl _dif, %%ebx \n\t" // check if at alignment boundary
|
|
|
2832 |
"movb %%al, -1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx
|
|
|
2833 |
"jb avg_lp1 \n\t" // repeat until at alignment boundary
|
|
|
2834 |
|
|
|
2835 |
"avg_go: \n\t"
|
|
|
2836 |
"movl _FullLength, %%eax \n\t"
|
|
|
2837 |
"movl %%eax, %%ecx \n\t"
|
|
|
2838 |
"subl %%ebx, %%eax \n\t" // subtract alignment fix
|
|
|
2839 |
"andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8
|
|
|
2840 |
"subl %%eax, %%ecx \n\t" // drop over bytes from original length
|
|
|
2841 |
"movl %%ecx, _MMXLength \n\t"
|
|
|
2842 |
#ifdef __PIC__
|
|
|
2843 |
"popl %%ebx \n\t" // restore index to Global Offset Table
|
|
|
2844 |
#endif
|
|
|
2845 |
|
|
|
2846 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
2847 |
"=S" (dummy_value_S),
|
|
|
2848 |
"=D" (dummy_value_D)
|
|
|
2849 |
|
|
|
2850 |
: "0" (bpp), // ecx // input regs
|
|
|
2851 |
"1" (prev_row), // esi
|
|
|
2852 |
"2" (row) // edi
|
|
|
2853 |
|
|
|
2854 |
: "%eax", "%edx" // clobber list
|
|
|
2855 |
#ifndef __PIC__
|
|
|
2856 |
, "%ebx"
|
|
|
2857 |
#endif
|
|
|
2858 |
// GRR: INCLUDE "memory" as clobbered? (_dif, _MMXLength)
|
|
|
2859 |
// (seems to work fine without...)
|
|
|
2860 |
);
|
|
|
2861 |
|
|
|
2862 |
// now do the math for the rest of the row
|
|
|
2863 |
switch (bpp)
|
|
|
2864 |
{
|
|
|
2865 |
case 3:
|
|
|
2866 |
{
|
|
|
2867 |
_ActiveMask.use = 0x0000000000ffffffLL;
|
|
|
2868 |
_ShiftBpp.use = 24; // == 3 * 8
|
|
|
2869 |
_ShiftRem.use = 40; // == 64 - 24
|
|
|
2870 |
|
|
|
2871 |
__asm__ __volatile__ (
|
|
|
2872 |
// re-init address pointers and offset
|
|
|
2873 |
"movq _ActiveMask, %%mm7 \n\t"
|
|
|
2874 |
"movl _dif, %%ecx \n\t" // ecx: x = offset to
|
|
|
2875 |
"movq _LBCarryMask, %%mm5 \n\t" // alignment boundary
|
|
|
2876 |
// preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
2877 |
"movq _HBClearMask, %%mm4 \n\t"
|
|
|
2878 |
// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
2879 |
|
|
|
2880 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
2881 |
"movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|
|
2882 |
// (correct pos. in loop below)
|
|
|
2883 |
"avg_3lp: \n\t"
|
|
|
2884 |
"movq (%%edi,%%ecx,), %%mm0 \n\t" // load mm0 with Avg(x)
|
|
|
2885 |
"movq %%mm5, %%mm3 \n\t"
|
|
|
2886 |
"psrlq _ShiftRem, %%mm2 \n\t" // correct position Raw(x-bpp)
|
|
|
2887 |
// data
|
|
|
2888 |
"movq (%%esi,%%ecx,), %%mm1 \n\t" // load mm1 with Prior(x)
|
|
|
2889 |
"movq %%mm7, %%mm6 \n\t"
|
|
|
2890 |
"pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|
|
2891 |
"psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|
|
2892 |
"pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|
|
2893 |
// byte
|
|
|
2894 |
"paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|
|
2895 |
// each byte
|
|
|
2896 |
// add 1st active group (Raw(x-bpp)/2) to average with LBCarry
|
|
|
2897 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
2898 |
// LBCarrys
|
|
|
2899 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
2900 |
// where both
|
|
|
2901 |
// lsb's were == 1 (only valid for active group)
|
|
|
2902 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
2903 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
2904 |
// byte
|
|
|
2905 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
2906 |
// for each byte
|
|
|
2907 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 1
|
|
|
2908 |
// bytes to add to Avg
|
|
|
2909 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|
|
2910 |
// Avg for each Active
|
|
|
2911 |
// byte
|
|
|
2912 |
// add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
2913 |
"psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|
|
2914 |
// bytes 3-5
|
|
|
2915 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
2916 |
"psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
2917 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
2918 |
// LBCarrys
|
|
|
2919 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
2920 |
// where both
|
|
|
2921 |
// lsb's were == 1 (only valid for active group)
|
|
|
2922 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
2923 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
2924 |
// byte
|
|
|
2925 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
2926 |
// for each byte
|
|
|
2927 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|
|
2928 |
// bytes to add to Avg
|
|
|
2929 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|
|
2930 |
// Avg for each Active
|
|
|
2931 |
// byte
|
|
|
2932 |
|
|
|
2933 |
// add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
2934 |
"psllq _ShiftBpp, %%mm6 \n\t" // shift mm6 mask to cover last
|
|
|
2935 |
// two
|
|
|
2936 |
// bytes
|
|
|
2937 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
2938 |
"psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
2939 |
// Data only needs to be shifted once here to
|
|
|
2940 |
// get the correct x-bpp offset.
|
|
|
2941 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
2942 |
// LBCarrys
|
|
|
2943 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
2944 |
// where both
|
|
|
2945 |
// lsb's were == 1 (only valid for active group)
|
|
|
2946 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
2947 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
2948 |
// byte
|
|
|
2949 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
2950 |
// for each byte
|
|
|
2951 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|
|
2952 |
// bytes to add to Avg
|
|
|
2953 |
"addl $8, %%ecx \n\t"
|
|
|
2954 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|
|
2955 |
// Avg for each Active
|
|
|
2956 |
// byte
|
|
|
2957 |
// now ready to write back to memory
|
|
|
2958 |
"movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|
|
2959 |
// move updated Raw(x) to use as Raw(x-bpp) for next loop
|
|
|
2960 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
2961 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raw(x) to mm2
|
|
|
2962 |
"jb avg_3lp \n\t"
|
|
|
2963 |
|
|
|
2964 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
2965 |
"=D" (dummy_value_D)
|
|
|
2966 |
|
|
|
2967 |
: "0" (prev_row), // esi // input regs
|
|
|
2968 |
"1" (row) // edi
|
|
|
2969 |
|
|
|
2970 |
: "%ecx" // clobber list
|
|
|
2971 |
#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
2972 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
2973 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
2974 |
#endif
|
|
|
2975 |
);
|
|
|
2976 |
}
|
|
|
2977 |
break; // end 3 bpp
|
|
|
2978 |
|
|
|
2979 |
case 6:
|
|
|
2980 |
case 4:
|
|
|
2981 |
//case 7: // who wrote this? PNG doesn't support 5 or 7 bytes/pixel
|
|
|
2982 |
//case 5: // GRR BOGUS
|
|
|
2983 |
{
|
|
|
2984 |
_ActiveMask.use = 0xffffffffffffffffLL; // use shift below to clear
|
|
|
2985 |
// appropriate inactive bytes
|
|
|
2986 |
_ShiftBpp.use = bpp << 3;
|
|
|
2987 |
_ShiftRem.use = 64 - _ShiftBpp.use;
|
|
|
2988 |
|
|
|
2989 |
__asm__ __volatile__ (
|
|
|
2990 |
"movq _HBClearMask, %%mm4 \n\t"
|
|
|
2991 |
|
|
|
2992 |
// re-init address pointers and offset
|
|
|
2993 |
"movl _dif, %%ecx \n\t" // ecx: x = offset to
|
|
|
2994 |
// alignment boundary
|
|
|
2995 |
|
|
|
2996 |
// load _ActiveMask and clear all bytes except for 1st active group
|
|
|
2997 |
"movq _ActiveMask, %%mm7 \n\t"
|
|
|
2998 |
// preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
2999 |
"psrlq _ShiftRem, %%mm7 \n\t"
|
|
|
3000 |
// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
3001 |
"movq %%mm7, %%mm6 \n\t"
|
|
|
3002 |
"movq _LBCarryMask, %%mm5 \n\t"
|
|
|
3003 |
"psllq _ShiftBpp, %%mm6 \n\t" // create mask for 2nd active
|
|
|
3004 |
// group
|
|
|
3005 |
|
|
|
3006 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
3007 |
"movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|
|
3008 |
// (we correct pos. in loop below)
|
|
|
3009 |
"avg_4lp: \n\t"
|
|
|
3010 |
"movq (%%edi,%%ecx,), %%mm0 \n\t"
|
|
|
3011 |
"psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
3012 |
"movq (%%esi,%%ecx,), %%mm1 \n\t"
|
|
|
3013 |
// add (Prev_row/2) to average
|
|
|
3014 |
"movq %%mm5, %%mm3 \n\t"
|
|
|
3015 |
"pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|
|
3016 |
"psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|
|
3017 |
"pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|
|
3018 |
// byte
|
|
|
3019 |
"paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|
|
3020 |
// each byte
|
|
|
3021 |
// add 1st active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
3022 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
3023 |
// LBCarrys
|
|
|
3024 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
3025 |
// where both
|
|
|
3026 |
// lsb's were == 1 (only valid for active group)
|
|
|
3027 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3028 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
3029 |
// byte
|
|
|
3030 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
3031 |
// for each byte
|
|
|
3032 |
"pand %%mm7, %%mm2 \n\t" // leave only Active Group 1
|
|
|
3033 |
// bytes to add to Avg
|
|
|
3034 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg
|
|
|
3035 |
// for each Active
|
|
|
3036 |
// byte
|
|
|
3037 |
// add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
3038 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
3039 |
"psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
3040 |
"addl $8, %%ecx \n\t"
|
|
|
3041 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
3042 |
// LBCarrys
|
|
|
3043 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
3044 |
// where both
|
|
|
3045 |
// lsb's were == 1 (only valid for active group)
|
|
|
3046 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3047 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
3048 |
// byte
|
|
|
3049 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
3050 |
// for each byte
|
|
|
3051 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|
|
3052 |
// bytes to add to Avg
|
|
|
3053 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|
|
3054 |
// Avg for each Active
|
|
|
3055 |
// byte
|
|
|
3056 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
3057 |
// now ready to write back to memory
|
|
|
3058 |
"movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|
|
3059 |
// prep Raw(x-bpp) for next loop
|
|
|
3060 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
3061 |
"jb avg_4lp \n\t"
|
|
|
3062 |
|
|
|
3063 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
3064 |
"=D" (dummy_value_D)
|
|
|
3065 |
|
|
|
3066 |
: "0" (prev_row), // esi // input regs
|
|
|
3067 |
"1" (row) // edi
|
|
|
3068 |
|
|
|
3069 |
: "%ecx" // clobber list
|
|
|
3070 |
#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
3071 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
3072 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
3073 |
#endif
|
|
|
3074 |
);
|
|
|
3075 |
}
|
|
|
3076 |
break; // end 4,6 bpp
|
|
|
3077 |
|
|
|
3078 |
case 2:
|
|
|
3079 |
{
|
|
|
3080 |
_ActiveMask.use = 0x000000000000ffffLL;
|
|
|
3081 |
_ShiftBpp.use = 16; // == 2 * 8
|
|
|
3082 |
_ShiftRem.use = 48; // == 64 - 16
|
|
|
3083 |
|
|
|
3084 |
__asm__ __volatile__ (
|
|
|
3085 |
// load _ActiveMask
|
|
|
3086 |
"movq _ActiveMask, %%mm7 \n\t"
|
|
|
3087 |
// re-init address pointers and offset
|
|
|
3088 |
"movl _dif, %%ecx \n\t" // ecx: x = offset to alignment
|
|
|
3089 |
// boundary
|
|
|
3090 |
"movq _LBCarryMask, %%mm5 \n\t"
|
|
|
3091 |
// preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
3092 |
"movq _HBClearMask, %%mm4 \n\t"
|
|
|
3093 |
// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
3094 |
|
|
|
3095 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
3096 |
"movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|
|
3097 |
// (we correct pos. in loop below)
|
|
|
3098 |
"avg_2lp: \n\t"
|
|
|
3099 |
"movq (%%edi,%%ecx,), %%mm0 \n\t"
|
|
|
3100 |
"psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
3101 |
"movq (%%esi,%%ecx,), %%mm1 \n\t" // (GRR BUGFIX: was psllq)
|
|
|
3102 |
// add (Prev_row/2) to average
|
|
|
3103 |
"movq %%mm5, %%mm3 \n\t"
|
|
|
3104 |
"pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|
|
3105 |
"psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|
|
3106 |
"pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|
|
3107 |
// byte
|
|
|
3108 |
"movq %%mm7, %%mm6 \n\t"
|
|
|
3109 |
"paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|
|
3110 |
// each byte
|
|
|
3111 |
|
|
|
3112 |
// add 1st active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
3113 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
3114 |
// LBCarrys
|
|
|
3115 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
3116 |
// where both
|
|
|
3117 |
// lsb's were == 1 (only valid
|
|
|
3118 |
// for active group)
|
|
|
3119 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3120 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
3121 |
// byte
|
|
|
3122 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
3123 |
// for each byte
|
|
|
3124 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 1
|
|
|
3125 |
// bytes to add to Avg
|
|
|
3126 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg
|
|
|
3127 |
// for each Active byte
|
|
|
3128 |
|
|
|
3129 |
// add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
3130 |
"psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|
|
3131 |
// bytes 2 & 3
|
|
|
3132 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
3133 |
"psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
3134 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
3135 |
// LBCarrys
|
|
|
3136 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
3137 |
// where both
|
|
|
3138 |
// lsb's were == 1 (only valid
|
|
|
3139 |
// for active group)
|
|
|
3140 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3141 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
3142 |
// byte
|
|
|
3143 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
3144 |
// for each byte
|
|
|
3145 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|
|
3146 |
// bytes to add to Avg
|
|
|
3147 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|
|
3148 |
// Avg for each Active byte
|
|
|
3149 |
|
|
|
3150 |
// add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
3151 |
"psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|
|
3152 |
// bytes 4 & 5
|
|
|
3153 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
3154 |
"psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
3155 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
3156 |
// LBCarrys
|
|
|
3157 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
3158 |
// where both lsb's were == 1
|
|
|
3159 |
// (only valid for active group)
|
|
|
3160 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3161 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
3162 |
// byte
|
|
|
3163 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
3164 |
// for each byte
|
|
|
3165 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|
|
3166 |
// bytes to add to Avg
|
|
|
3167 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|
|
3168 |
// Avg for each Active byte
|
|
|
3169 |
|
|
|
3170 |
// add 4th active group (Raw(x-bpp)/2) to average with _LBCarry
|
|
|
3171 |
"psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|
|
3172 |
// bytes 6 & 7
|
|
|
3173 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
3174 |
"psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|
|
3175 |
"addl $8, %%ecx \n\t"
|
|
|
3176 |
"movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|
|
3177 |
// LBCarrys
|
|
|
3178 |
"pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|
|
3179 |
// where both
|
|
|
3180 |
// lsb's were == 1 (only valid
|
|
|
3181 |
// for active group)
|
|
|
3182 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3183 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
3184 |
// byte
|
|
|
3185 |
"paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|
|
3186 |
// for each byte
|
|
|
3187 |
"pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|
|
3188 |
// bytes to add to Avg
|
|
|
3189 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|
|
3190 |
// Avg for each Active byte
|
|
|
3191 |
|
|
|
3192 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
3193 |
// now ready to write back to memory
|
|
|
3194 |
"movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|
|
3195 |
// prep Raw(x-bpp) for next loop
|
|
|
3196 |
"movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|
|
3197 |
"jb avg_2lp \n\t"
|
|
|
3198 |
|
|
|
3199 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
3200 |
"=D" (dummy_value_D)
|
|
|
3201 |
|
|
|
3202 |
: "0" (prev_row), // esi // input regs
|
|
|
3203 |
"1" (row) // edi
|
|
|
3204 |
|
|
|
3205 |
: "%ecx" // clobber list
|
|
|
3206 |
#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
3207 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
3208 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
3209 |
#endif
|
|
|
3210 |
);
|
|
|
3211 |
}
|
|
|
3212 |
break; // end 2 bpp
|
|
|
3213 |
|
|
|
3214 |
case 1:
|
|
|
3215 |
{
|
|
|
3216 |
__asm__ __volatile__ (
|
|
|
3217 |
// re-init address pointers and offset
|
|
|
3218 |
#ifdef __PIC__
|
|
|
3219 |
"pushl %%ebx \n\t" // save Global Offset Table index
|
|
|
3220 |
#endif
|
|
|
3221 |
"movl _dif, %%ebx \n\t" // ebx: x = offset to alignment
|
|
|
3222 |
// boundary
|
|
|
3223 |
// preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
3224 |
"cmpl _FullLength, %%ebx \n\t" // test if offset at end of array
|
|
|
3225 |
"jnb avg_1end \n\t"
|
|
|
3226 |
// do Paeth decode for remaining bytes
|
|
|
3227 |
// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
3228 |
"movl %%edi, %%edx \n\t"
|
|
|
3229 |
// preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|
|
3230 |
"subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
|
|
|
3231 |
"xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx
|
|
|
3232 |
// in loop below
|
|
|
3233 |
"avg_1lp: \n\t"
|
|
|
3234 |
// Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
|
|
|
3235 |
"xorl %%eax, %%eax \n\t"
|
|
|
3236 |
"movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
|
|
|
3237 |
"movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
|
|
|
3238 |
"addw %%cx, %%ax \n\t"
|
|
|
3239 |
"incl %%ebx \n\t"
|
|
|
3240 |
"shrw %%ax \n\t" // divide by 2
|
|
|
3241 |
"addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset
|
|
|
3242 |
// inc ebx
|
|
|
3243 |
"cmpl _FullLength, %%ebx \n\t" // check if at end of array
|
|
|
3244 |
"movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x);
|
|
|
3245 |
// mov does not affect flags; -1 to offset inc ebx
|
|
|
3246 |
"jb avg_1lp \n\t"
|
|
|
3247 |
|
|
|
3248 |
"avg_1end: \n\t"
|
|
|
3249 |
#ifdef __PIC__
|
|
|
3250 |
"popl %%ebx \n\t" // Global Offset Table index
|
|
|
3251 |
#endif
|
|
|
3252 |
|
|
|
3253 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
3254 |
"=S" (dummy_value_S),
|
|
|
3255 |
"=D" (dummy_value_D)
|
|
|
3256 |
|
|
|
3257 |
: "0" (bpp), // ecx // input regs
|
|
|
3258 |
"1" (prev_row), // esi
|
|
|
3259 |
"2" (row) // edi
|
|
|
3260 |
|
|
|
3261 |
: "%eax", "%edx" // clobber list
|
|
|
3262 |
#ifndef __PIC__
|
|
|
3263 |
, "%ebx"
|
|
|
3264 |
#endif
|
|
|
3265 |
);
|
|
|
3266 |
}
|
|
|
3267 |
return; // end 1 bpp
|
|
|
3268 |
|
|
|
3269 |
case 8:
|
|
|
3270 |
{
|
|
|
3271 |
__asm__ __volatile__ (
|
|
|
3272 |
// re-init address pointers and offset
|
|
|
3273 |
"movl _dif, %%ecx \n\t" // ecx: x == offset to alignment
|
|
|
3274 |
"movq _LBCarryMask, %%mm5 \n\t" // boundary
|
|
|
3275 |
// preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
3276 |
"movq _HBClearMask, %%mm4 \n\t"
|
|
|
3277 |
// preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
3278 |
|
|
|
3279 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
3280 |
"movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|
|
3281 |
// (NO NEED to correct pos. in loop below)
|
|
|
3282 |
|
|
|
3283 |
"avg_8lp: \n\t"
|
|
|
3284 |
"movq (%%edi,%%ecx,), %%mm0 \n\t"
|
|
|
3285 |
"movq %%mm5, %%mm3 \n\t"
|
|
|
3286 |
"movq (%%esi,%%ecx,), %%mm1 \n\t"
|
|
|
3287 |
"addl $8, %%ecx \n\t"
|
|
|
3288 |
"pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|
|
3289 |
"psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|
|
3290 |
"pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte
|
|
|
3291 |
// where both lsb's were == 1
|
|
|
3292 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3293 |
"pand %%mm4, %%mm1 \n\t" // clear invalid bit 7, each byte
|
|
|
3294 |
"paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg, each byte
|
|
|
3295 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7, each byte
|
|
|
3296 |
"paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg, each
|
|
|
3297 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each
|
|
|
3298 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
3299 |
"movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|
|
3300 |
"movq %%mm0, %%mm2 \n\t" // reuse as Raw(x-bpp)
|
|
|
3301 |
"jb avg_8lp \n\t"
|
|
|
3302 |
|
|
|
3303 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
3304 |
"=D" (dummy_value_D)
|
|
|
3305 |
|
|
|
3306 |
: "0" (prev_row), // esi // input regs
|
|
|
3307 |
"1" (row) // edi
|
|
|
3308 |
|
|
|
3309 |
: "%ecx" // clobber list
|
|
|
3310 |
#if 0 /* %mm0, ..., %mm5 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
3311 |
, "%mm0", "%mm1", "%mm2"
|
|
|
3312 |
, "%mm3", "%mm4", "%mm5"
|
|
|
3313 |
#endif
|
|
|
3314 |
);
|
|
|
3315 |
}
|
|
|
3316 |
break; // end 8 bpp
|
|
|
3317 |
|
|
|
3318 |
default: // bpp greater than 8 (!= 1,2,3,4,[5],6,[7],8)
|
|
|
3319 |
{
|
|
|
3320 |
|
|
|
3321 |
#ifdef PNG_DEBUG
|
|
|
3322 |
// GRR: PRINT ERROR HERE: SHOULD NEVER BE REACHED
|
|
|
3323 |
png_debug(1,
|
|
|
3324 |
"Internal logic error in pnggccrd (png_read_filter_row_mmx_avg())\n");
|
|
|
3325 |
#endif
|
|
|
3326 |
|
|
|
3327 |
#if 0
|
|
|
3328 |
__asm__ __volatile__ (
|
|
|
3329 |
"movq _LBCarryMask, %%mm5 \n\t"
|
|
|
3330 |
// re-init address pointers and offset
|
|
|
3331 |
"movl _dif, %%ebx \n\t" // ebx: x = offset to
|
|
|
3332 |
// alignment boundary
|
|
|
3333 |
"movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
3334 |
"movq _HBClearMask, %%mm4 \n\t"
|
|
|
3335 |
"movl %%edi, %%edx \n\t"
|
|
|
3336 |
"movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
3337 |
"subl bpp, %%edx \n\t" // edx: Raw(x-bpp)
|
|
|
3338 |
"avg_Alp: \n\t"
|
|
|
3339 |
"movq (%%edi,%%ebx,), %%mm0 \n\t"
|
|
|
3340 |
"movq %%mm5, %%mm3 \n\t"
|
|
|
3341 |
"movq (%%esi,%%ebx,), %%mm1 \n\t"
|
|
|
3342 |
"pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|
|
3343 |
"movq (%%edx,%%ebx,), %%mm2 \n\t"
|
|
|
3344 |
"psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|
|
3345 |
"pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte
|
|
|
3346 |
// where both lsb's were == 1
|
|
|
3347 |
"psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|
|
3348 |
"pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|
|
3349 |
// byte
|
|
|
3350 |
"paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg for each
|
|
|
3351 |
// byte
|
|
|
3352 |
"pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|
|
3353 |
// byte
|
|
|
3354 |
"paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|
|
3355 |
// each byte
|
|
|
3356 |
"addl $8, %%ebx \n\t"
|
|
|
3357 |
"paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each
|
|
|
3358 |
// byte
|
|
|
3359 |
"cmpl _MMXLength, %%ebx \n\t"
|
|
|
3360 |
"movq %%mm0, -8(%%edi,%%ebx,) \n\t"
|
|
|
3361 |
"jb avg_Alp \n\t"
|
|
|
3362 |
|
|
|
3363 |
: // FIXASM: output regs/vars go here, e.g.: "=m" (memory_var)
|
|
|
3364 |
|
|
|
3365 |
: // FIXASM: input regs, e.g.: "c" (count), "S" (src), "D" (dest)
|
|
|
3366 |
|
|
|
3367 |
: "%ebx", "%edx", "%edi", "%esi" // CHECKASM: clobber list
|
|
|
3368 |
);
|
|
|
3369 |
#endif /* 0 - NEVER REACHED */
|
|
|
3370 |
}
|
|
|
3371 |
break;
|
|
|
3372 |
|
|
|
3373 |
} // end switch (bpp)
|
|
|
3374 |
|
|
|
3375 |
__asm__ __volatile__ (
|
|
|
3376 |
// MMX acceleration complete; now do clean-up
|
|
|
3377 |
// check if any remaining bytes left to decode
|
|
|
3378 |
#ifdef __PIC__
|
|
|
3379 |
"pushl %%ebx \n\t" // save index to Global Offset Table
|
|
|
3380 |
#endif
|
|
|
3381 |
"movl _MMXLength, %%ebx \n\t" // ebx: x == offset bytes after MMX
|
|
|
3382 |
//pre "movl row, %%edi \n\t" // edi: Avg(x)
|
|
|
3383 |
"cmpl _FullLength, %%ebx \n\t" // test if offset at end of array
|
|
|
3384 |
"jnb avg_end \n\t"
|
|
|
3385 |
|
|
|
3386 |
// do Avg decode for remaining bytes
|
|
|
3387 |
//pre "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|
|
3388 |
"movl %%edi, %%edx \n\t"
|
|
|
3389 |
//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|
|
3390 |
"subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
|
|
|
3391 |
"xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below
|
|
|
3392 |
|
|
|
3393 |
"avg_lp2: \n\t"
|
|
|
3394 |
// Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
|
|
|
3395 |
"xorl %%eax, %%eax \n\t"
|
|
|
3396 |
"movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
|
|
|
3397 |
"movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
|
|
|
3398 |
"addw %%cx, %%ax \n\t"
|
|
|
3399 |
"incl %%ebx \n\t"
|
|
|
3400 |
"shrw %%ax \n\t" // divide by 2
|
|
|
3401 |
"addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx
|
|
|
3402 |
"cmpl _FullLength, %%ebx \n\t" // check if at end of array
|
|
|
3403 |
"movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x) [mov does not
|
|
|
3404 |
"jb avg_lp2 \n\t" // affect flags; -1 to offset inc ebx]
|
|
|
3405 |
|
|
|
3406 |
"avg_end: \n\t"
|
|
|
3407 |
"EMMS \n\t" // end MMX; prep for poss. FP instrs.
|
|
|
3408 |
#ifdef __PIC__
|
|
|
3409 |
"popl %%ebx \n\t" // restore index to Global Offset Table
|
|
|
3410 |
#endif
|
|
|
3411 |
|
|
|
3412 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
3413 |
"=S" (dummy_value_S),
|
|
|
3414 |
"=D" (dummy_value_D)
|
|
|
3415 |
|
|
|
3416 |
: "0" (bpp), // ecx // input regs
|
|
|
3417 |
"1" (prev_row), // esi
|
|
|
3418 |
"2" (row) // edi
|
|
|
3419 |
|
|
|
3420 |
: "%eax", "%edx" // clobber list
|
|
|
3421 |
#ifndef __PIC__
|
|
|
3422 |
, "%ebx"
|
|
|
3423 |
#endif
|
|
|
3424 |
);
|
|
|
3425 |
|
|
|
3426 |
} /* end png_read_filter_row_mmx_avg() */
|
|
|
3427 |
#endif
|
|
|
3428 |
|
|
|
3429 |
|
|
|
3430 |
|
|
|
3431 |
#ifdef PNG_THREAD_UNSAFE_OK
|
|
|
3432 |
//===========================================================================//
|
|
|
3433 |
// //
|
|
|
3434 |
// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ P A E T H //
|
|
|
3435 |
// //
|
|
|
3436 |
//===========================================================================//
|
|
|
3437 |
|
|
|
3438 |
// Optimized code for PNG Paeth filter decoder
|
|
|
3439 |
|
|
|
3440 |
static void /* PRIVATE */
|
|
|
3441 |
png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
|
|
|
3442 |
png_bytep prev_row)
|
|
|
3443 |
{
|
|
|
3444 |
int bpp;
|
|
|
3445 |
int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error
|
|
|
3446 |
int dummy_value_S;
|
|
|
3447 |
int dummy_value_D;
|
|
|
3448 |
|
|
|
3449 |
bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel
|
|
|
3450 |
_FullLength = row_info->rowbytes; // # of bytes to filter
|
|
|
3451 |
|
|
|
3452 |
__asm__ __volatile__ (
|
|
|
3453 |
#ifdef __PIC__
|
|
|
3454 |
"pushl %%ebx \n\t" // save index to Global Offset Table
|
|
|
3455 |
#endif
|
|
|
3456 |
"xorl %%ebx, %%ebx \n\t" // ebx: x offset
|
|
|
3457 |
//pre "movl row, %%edi \n\t"
|
|
|
3458 |
"xorl %%edx, %%edx \n\t" // edx: x-bpp offset
|
|
|
3459 |
//pre "movl prev_row, %%esi \n\t"
|
|
|
3460 |
"xorl %%eax, %%eax \n\t"
|
|
|
3461 |
|
|
|
3462 |
// Compute the Raw value for the first bpp bytes
|
|
|
3463 |
// Note: the formula works out to be always
|
|
|
3464 |
// Paeth(x) = Raw(x) + Prior(x) where x < bpp
|
|
|
3465 |
"paeth_rlp: \n\t"
|
|
|
3466 |
"movb (%%edi,%%ebx,), %%al \n\t"
|
|
|
3467 |
"addb (%%esi,%%ebx,), %%al \n\t"
|
|
|
3468 |
"incl %%ebx \n\t"
|
|
|
3469 |
//pre "cmpl bpp, %%ebx \n\t" (bpp is preloaded into ecx)
|
|
|
3470 |
"cmpl %%ecx, %%ebx \n\t"
|
|
|
3471 |
"movb %%al, -1(%%edi,%%ebx,) \n\t"
|
|
|
3472 |
"jb paeth_rlp \n\t"
|
|
|
3473 |
// get # of bytes to alignment
|
|
|
3474 |
"movl %%edi, _dif \n\t" // take start of row
|
|
|
3475 |
"addl %%ebx, _dif \n\t" // add bpp
|
|
|
3476 |
"xorl %%ecx, %%ecx \n\t"
|
|
|
3477 |
"addl $0xf, _dif \n\t" // add 7 + 8 to incr past alignment
|
|
|
3478 |
// boundary
|
|
|
3479 |
"andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
|
|
|
3480 |
"subl %%edi, _dif \n\t" // subtract from start ==> value ebx
|
|
|
3481 |
// at alignment
|
|
|
3482 |
"jz paeth_go \n\t"
|
|
|
3483 |
// fix alignment
|
|
|
3484 |
|
|
|
3485 |
"paeth_lp1: \n\t"
|
|
|
3486 |
"xorl %%eax, %%eax \n\t"
|
|
|
3487 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
3488 |
"movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
|
|
|
3489 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
3490 |
"subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|
|
3491 |
"movl %%eax, _patemp \n\t" // Save pav for later use
|
|
|
3492 |
"xorl %%eax, %%eax \n\t"
|
|
|
3493 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
3494 |
"movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
|
|
|
3495 |
"subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|
|
3496 |
"movl %%eax, %%ecx \n\t"
|
|
|
3497 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
3498 |
"addl _patemp, %%eax \n\t" // pcv = pav + pbv
|
|
|
3499 |
// pc = abs(pcv)
|
|
|
3500 |
"testl $0x80000000, %%eax \n\t"
|
|
|
3501 |
"jz paeth_pca \n\t"
|
|
|
3502 |
"negl %%eax \n\t" // reverse sign of neg values
|
|
|
3503 |
|
|
|
3504 |
"paeth_pca: \n\t"
|
|
|
3505 |
"movl %%eax, _pctemp \n\t" // save pc for later use
|
|
|
3506 |
// pb = abs(pbv)
|
|
|
3507 |
"testl $0x80000000, %%ecx \n\t"
|
|
|
3508 |
"jz paeth_pba \n\t"
|
|
|
3509 |
"negl %%ecx \n\t" // reverse sign of neg values
|
|
|
3510 |
|
|
|
3511 |
"paeth_pba: \n\t"
|
|
|
3512 |
"movl %%ecx, _pbtemp \n\t" // save pb for later use
|
|
|
3513 |
// pa = abs(pav)
|
|
|
3514 |
"movl _patemp, %%eax \n\t"
|
|
|
3515 |
"testl $0x80000000, %%eax \n\t"
|
|
|
3516 |
"jz paeth_paa \n\t"
|
|
|
3517 |
"negl %%eax \n\t" // reverse sign of neg values
|
|
|
3518 |
|
|
|
3519 |
"paeth_paa: \n\t"
|
|
|
3520 |
"movl %%eax, _patemp \n\t" // save pa for later use
|
|
|
3521 |
// test if pa <= pb
|
|
|
3522 |
"cmpl %%ecx, %%eax \n\t"
|
|
|
3523 |
"jna paeth_abb \n\t"
|
|
|
3524 |
// pa > pb; now test if pb <= pc
|
|
|
3525 |
"cmpl _pctemp, %%ecx \n\t"
|
|
|
3526 |
"jna paeth_bbc \n\t"
|
|
|
3527 |
// pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|
|
3528 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
3529 |
"jmp paeth_paeth \n\t"
|
|
|
3530 |
|
|
|
3531 |
"paeth_bbc: \n\t"
|
|
|
3532 |
// pb <= pc; Raw(x) = Paeth(x) + Prior(x)
|
|
|
3533 |
"movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
|
|
|
3534 |
"jmp paeth_paeth \n\t"
|
|
|
3535 |
|
|
|
3536 |
"paeth_abb: \n\t"
|
|
|
3537 |
// pa <= pb; now test if pa <= pc
|
|
|
3538 |
"cmpl _pctemp, %%eax \n\t"
|
|
|
3539 |
"jna paeth_abc \n\t"
|
|
|
3540 |
// pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|
|
3541 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
3542 |
"jmp paeth_paeth \n\t"
|
|
|
3543 |
|
|
|
3544 |
"paeth_abc: \n\t"
|
|
|
3545 |
// pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
|
|
|
3546 |
"movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
|
|
|
3547 |
|
|
|
3548 |
"paeth_paeth: \n\t"
|
|
|
3549 |
"incl %%ebx \n\t"
|
|
|
3550 |
"incl %%edx \n\t"
|
|
|
3551 |
// Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
|
|
|
3552 |
"addb %%cl, -1(%%edi,%%ebx,) \n\t"
|
|
|
3553 |
"cmpl _dif, %%ebx \n\t"
|
|
|
3554 |
"jb paeth_lp1 \n\t"
|
|
|
3555 |
|
|
|
3556 |
"paeth_go: \n\t"
|
|
|
3557 |
"movl _FullLength, %%ecx \n\t"
|
|
|
3558 |
"movl %%ecx, %%eax \n\t"
|
|
|
3559 |
"subl %%ebx, %%eax \n\t" // subtract alignment fix
|
|
|
3560 |
"andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8
|
|
|
3561 |
"subl %%eax, %%ecx \n\t" // drop over bytes from original length
|
|
|
3562 |
"movl %%ecx, _MMXLength \n\t"
|
|
|
3563 |
#ifdef __PIC__
|
|
|
3564 |
"popl %%ebx \n\t" // restore index to Global Offset Table
|
|
|
3565 |
#endif
|
|
|
3566 |
|
|
|
3567 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
3568 |
"=S" (dummy_value_S),
|
|
|
3569 |
"=D" (dummy_value_D)
|
|
|
3570 |
|
|
|
3571 |
: "0" (bpp), // ecx // input regs
|
|
|
3572 |
"1" (prev_row), // esi
|
|
|
3573 |
"2" (row) // edi
|
|
|
3574 |
|
|
|
3575 |
: "%eax", "%edx" // clobber list
|
|
|
3576 |
#ifndef __PIC__
|
|
|
3577 |
, "%ebx"
|
|
|
3578 |
#endif
|
|
|
3579 |
);
|
|
|
3580 |
|
|
|
3581 |
// now do the math for the rest of the row
|
|
|
3582 |
switch (bpp)
|
|
|
3583 |
{
|
|
|
3584 |
case 3:
|
|
|
3585 |
{
|
|
|
3586 |
_ActiveMask.use = 0x0000000000ffffffLL;
|
|
|
3587 |
_ActiveMaskEnd.use = 0xffff000000000000LL;
|
|
|
3588 |
_ShiftBpp.use = 24; // == bpp(3) * 8
|
|
|
3589 |
_ShiftRem.use = 40; // == 64 - 24
|
|
|
3590 |
|
|
|
3591 |
__asm__ __volatile__ (
|
|
|
3592 |
"movl _dif, %%ecx \n\t"
|
|
|
3593 |
// preload "movl row, %%edi \n\t"
|
|
|
3594 |
// preload "movl prev_row, %%esi \n\t"
|
|
|
3595 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3596 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
3597 |
"movq -8(%%edi,%%ecx,), %%mm1 \n\t"
|
|
|
3598 |
"paeth_3lp: \n\t"
|
|
|
3599 |
"psrlq _ShiftRem, %%mm1 \n\t" // shift last 3 bytes to 1st
|
|
|
3600 |
// 3 bytes
|
|
|
3601 |
"movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|
|
3602 |
"punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|
|
3603 |
"movq -8(%%esi,%%ecx,), %%mm3 \n\t" // prep c=Prior(x-bpp) bytes
|
|
|
3604 |
"punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|
|
3605 |
"psrlq _ShiftRem, %%mm3 \n\t" // shift last 3 bytes to 1st
|
|
|
3606 |
// 3 bytes
|
|
|
3607 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
3608 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
3609 |
"punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|
|
3610 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
3611 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
3612 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
3613 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
3614 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
3615 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
3616 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
3617 |
|
|
|
3618 |
// pa = abs(p-a) = abs(pav)
|
|
|
3619 |
// pb = abs(p-b) = abs(pbv)
|
|
|
3620 |
// pc = abs(p-c) = abs(pcv)
|
|
|
3621 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
3622 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
3623 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3624 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
3625 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3626 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
3627 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3628 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3629 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3630 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
3631 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3632 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3633 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3634 |
// test pa <= pb
|
|
|
3635 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
3636 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3637 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
3638 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
3639 |
// use mm7 mask to merge pa & pb
|
|
|
3640 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
3641 |
// use mm0 mask copy to merge a & b
|
|
|
3642 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
3643 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
3644 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
3645 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
3646 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
3647 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
3648 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
3649 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
3650 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
3651 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
3652 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
3653 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3654 |
"packuswb %%mm1, %%mm7 \n\t"
|
|
|
3655 |
"movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
|
|
|
3656 |
"pand _ActiveMask, %%mm7 \n\t"
|
|
|
3657 |
"movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1
|
|
|
3658 |
"paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|
|
3659 |
"punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|
|
3660 |
"movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
3661 |
"movq %%mm7, %%mm1 \n\t" // now mm1 will be used as
|
|
|
3662 |
// Raw(x-bpp)
|
|
|
3663 |
// now do Paeth for 2nd set of bytes (3-5)
|
|
|
3664 |
"psrlq _ShiftBpp, %%mm2 \n\t" // load b=Prior(x) step 2
|
|
|
3665 |
"punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|
|
3666 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
3667 |
"punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|
|
3668 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
3669 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
3670 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
3671 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
3672 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
3673 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
3674 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) =
|
|
|
3675 |
// pav + pbv = pbv + pav
|
|
|
3676 |
"movq %%mm5, %%mm6 \n\t"
|
|
|
3677 |
"paddw %%mm4, %%mm6 \n\t"
|
|
|
3678 |
|
|
|
3679 |
// pa = abs(p-a) = abs(pav)
|
|
|
3680 |
// pb = abs(p-b) = abs(pbv)
|
|
|
3681 |
// pc = abs(p-c) = abs(pcv)
|
|
|
3682 |
"pcmpgtw %%mm5, %%mm0 \n\t" // create mask pbv bytes < 0
|
|
|
3683 |
"pcmpgtw %%mm4, %%mm7 \n\t" // create mask pav bytes < 0
|
|
|
3684 |
"pand %%mm5, %%mm0 \n\t" // only pbv bytes < 0 in mm0
|
|
|
3685 |
"pand %%mm4, %%mm7 \n\t" // only pav bytes < 0 in mm7
|
|
|
3686 |
"psubw %%mm0, %%mm5 \n\t"
|
|
|
3687 |
"psubw %%mm7, %%mm4 \n\t"
|
|
|
3688 |
"psubw %%mm0, %%mm5 \n\t"
|
|
|
3689 |
"psubw %%mm7, %%mm4 \n\t"
|
|
|
3690 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3691 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
3692 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3693 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3694 |
// test pa <= pb
|
|
|
3695 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
3696 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3697 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
3698 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
3699 |
// use mm7 mask to merge pa & pb
|
|
|
3700 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
3701 |
// use mm0 mask copy to merge a & b
|
|
|
3702 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
3703 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
3704 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
3705 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
3706 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
3707 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
3708 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
3709 |
"movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|
|
3710 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
3711 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
3712 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
3713 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
3714 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3715 |
"packuswb %%mm1, %%mm7 \n\t"
|
|
|
3716 |
"movq %%mm2, %%mm3 \n\t" // load c=Prior(x-bpp) step 1
|
|
|
3717 |
"pand _ActiveMask, %%mm7 \n\t"
|
|
|
3718 |
"punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|
|
3719 |
"psllq _ShiftBpp, %%mm7 \n\t" // shift bytes to 2nd group of
|
|
|
3720 |
// 3 bytes
|
|
|
3721 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
3722 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
3723 |
"paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|
|
3724 |
"psllq _ShiftBpp, %%mm3 \n\t" // load c=Prior(x-bpp) step 2
|
|
|
3725 |
"movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
3726 |
"movq %%mm7, %%mm1 \n\t"
|
|
|
3727 |
"punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|
|
3728 |
"psllq _ShiftBpp, %%mm1 \n\t" // shift bytes
|
|
|
3729 |
// now mm1 will be used as Raw(x-bpp)
|
|
|
3730 |
// now do Paeth for 3rd, and final, set of bytes (6-7)
|
|
|
3731 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
3732 |
"punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|
|
3733 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
3734 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
3735 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
3736 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
3737 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
3738 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
3739 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3740 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
3741 |
|
|
|
3742 |
// pa = abs(p-a) = abs(pav)
|
|
|
3743 |
// pb = abs(p-b) = abs(pbv)
|
|
|
3744 |
// pc = abs(p-c) = abs(pcv)
|
|
|
3745 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
3746 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
3747 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3748 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
3749 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3750 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3751 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3752 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3753 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3754 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
3755 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3756 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3757 |
// test pa <= pb
|
|
|
3758 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
3759 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3760 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
3761 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
3762 |
// use mm0 mask copy to merge a & b
|
|
|
3763 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
3764 |
// use mm7 mask to merge pa & pb
|
|
|
3765 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
3766 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
3767 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
3768 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
3769 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
3770 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
3771 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
3772 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
3773 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
3774 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
3775 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
3776 |
"packuswb %%mm7, %%mm1 \n\t"
|
|
|
3777 |
// step ecx to next set of 8 bytes and repeat loop til done
|
|
|
3778 |
"addl $8, %%ecx \n\t"
|
|
|
3779 |
"pand _ActiveMaskEnd, %%mm1 \n\t"
|
|
|
3780 |
"paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with
|
|
|
3781 |
// Raw(x)
|
|
|
3782 |
|
|
|
3783 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
3784 |
"pxor %%mm0, %%mm0 \n\t" // pxor does not affect flags
|
|
|
3785 |
"movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
3786 |
// mm1 will be used as Raw(x-bpp) next loop
|
|
|
3787 |
// mm3 ready to be used as Prior(x-bpp) next loop
|
|
|
3788 |
"jb paeth_3lp \n\t"
|
|
|
3789 |
|
|
|
3790 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
3791 |
"=D" (dummy_value_D)
|
|
|
3792 |
|
|
|
3793 |
: "0" (prev_row), // esi // input regs
|
|
|
3794 |
"1" (row) // edi
|
|
|
3795 |
|
|
|
3796 |
: "%ecx" // clobber list
|
|
|
3797 |
#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
3798 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
3799 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
3800 |
#endif
|
|
|
3801 |
);
|
|
|
3802 |
}
|
|
|
3803 |
break; // end 3 bpp
|
|
|
3804 |
|
|
|
3805 |
case 6:
|
|
|
3806 |
//case 7: // GRR BOGUS
|
|
|
3807 |
//case 5: // GRR BOGUS
|
|
|
3808 |
{
|
|
|
3809 |
_ActiveMask.use = 0x00000000ffffffffLL;
|
|
|
3810 |
_ActiveMask2.use = 0xffffffff00000000LL;
|
|
|
3811 |
_ShiftBpp.use = bpp << 3; // == bpp * 8
|
|
|
3812 |
_ShiftRem.use = 64 - _ShiftBpp.use;
|
|
|
3813 |
|
|
|
3814 |
__asm__ __volatile__ (
|
|
|
3815 |
"movl _dif, %%ecx \n\t"
|
|
|
3816 |
// preload "movl row, %%edi \n\t"
|
|
|
3817 |
// preload "movl prev_row, %%esi \n\t"
|
|
|
3818 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
3819 |
"movq -8(%%edi,%%ecx,), %%mm1 \n\t"
|
|
|
3820 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3821 |
|
|
|
3822 |
"paeth_6lp: \n\t"
|
|
|
3823 |
// must shift to position Raw(x-bpp) data
|
|
|
3824 |
"psrlq _ShiftRem, %%mm1 \n\t"
|
|
|
3825 |
// do first set of 4 bytes
|
|
|
3826 |
"movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|
|
3827 |
"punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|
|
3828 |
"movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|
|
3829 |
"punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
|
|
|
3830 |
// must shift to position Prior(x-bpp) data
|
|
|
3831 |
"psrlq _ShiftRem, %%mm3 \n\t"
|
|
|
3832 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
3833 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
3834 |
"punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c
|
|
|
3835 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
3836 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
3837 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
3838 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
3839 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
3840 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
3841 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
3842 |
// pa = abs(p-a) = abs(pav)
|
|
|
3843 |
// pb = abs(p-b) = abs(pbv)
|
|
|
3844 |
// pc = abs(p-c) = abs(pcv)
|
|
|
3845 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
3846 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
3847 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3848 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
3849 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3850 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
3851 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3852 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3853 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3854 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
3855 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3856 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3857 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3858 |
// test pa <= pb
|
|
|
3859 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
3860 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3861 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
3862 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
3863 |
// use mm7 mask to merge pa & pb
|
|
|
3864 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
3865 |
// use mm0 mask copy to merge a & b
|
|
|
3866 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
3867 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
3868 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
3869 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
3870 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
3871 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
3872 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
3873 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
3874 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
3875 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
3876 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
3877 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3878 |
"packuswb %%mm1, %%mm7 \n\t"
|
|
|
3879 |
"movq -8(%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
|
|
|
3880 |
"pand _ActiveMask, %%mm7 \n\t"
|
|
|
3881 |
"psrlq _ShiftRem, %%mm3 \n\t"
|
|
|
3882 |
"movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) step 1
|
|
|
3883 |
"paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor and Raw(x)
|
|
|
3884 |
"movq %%mm2, %%mm6 \n\t"
|
|
|
3885 |
"movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
3886 |
"movq -8(%%edi,%%ecx,), %%mm1 \n\t"
|
|
|
3887 |
"psllq _ShiftBpp, %%mm6 \n\t"
|
|
|
3888 |
"movq %%mm7, %%mm5 \n\t"
|
|
|
3889 |
"psrlq _ShiftRem, %%mm1 \n\t"
|
|
|
3890 |
"por %%mm6, %%mm3 \n\t"
|
|
|
3891 |
"psllq _ShiftBpp, %%mm5 \n\t"
|
|
|
3892 |
"punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|
|
3893 |
"por %%mm5, %%mm1 \n\t"
|
|
|
3894 |
// do second set of 4 bytes
|
|
|
3895 |
"punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|
|
3896 |
"punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|
|
3897 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
3898 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
3899 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
3900 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
3901 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
3902 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
3903 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
3904 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
3905 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
3906 |
// pa = abs(p-a) = abs(pav)
|
|
|
3907 |
// pb = abs(p-b) = abs(pbv)
|
|
|
3908 |
// pc = abs(p-c) = abs(pcv)
|
|
|
3909 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
3910 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
3911 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3912 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
3913 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3914 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
3915 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
3916 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3917 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3918 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
3919 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
3920 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
3921 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3922 |
// test pa <= pb
|
|
|
3923 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
3924 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
3925 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
3926 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
3927 |
// use mm7 mask to merge pa & pb
|
|
|
3928 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
3929 |
// use mm0 mask copy to merge a & b
|
|
|
3930 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
3931 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
3932 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
3933 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
3934 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
3935 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
3936 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
3937 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
3938 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
3939 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
3940 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
3941 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
3942 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3943 |
// step ecx to next set of 8 bytes and repeat loop til done
|
|
|
3944 |
"addl $8, %%ecx \n\t"
|
|
|
3945 |
"packuswb %%mm7, %%mm1 \n\t"
|
|
|
3946 |
"paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x)
|
|
|
3947 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
3948 |
"movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
3949 |
// mm1 will be used as Raw(x-bpp) next loop
|
|
|
3950 |
"jb paeth_6lp \n\t"
|
|
|
3951 |
|
|
|
3952 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
3953 |
"=D" (dummy_value_D)
|
|
|
3954 |
|
|
|
3955 |
: "0" (prev_row), // esi // input regs
|
|
|
3956 |
"1" (row) // edi
|
|
|
3957 |
|
|
|
3958 |
: "%ecx" // clobber list
|
|
|
3959 |
#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
3960 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
3961 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
3962 |
#endif
|
|
|
3963 |
);
|
|
|
3964 |
}
|
|
|
3965 |
break; // end 6 bpp
|
|
|
3966 |
|
|
|
3967 |
case 4:
|
|
|
3968 |
{
|
|
|
3969 |
_ActiveMask.use = 0x00000000ffffffffLL;
|
|
|
3970 |
|
|
|
3971 |
__asm__ __volatile__ (
|
|
|
3972 |
"movl _dif, %%ecx \n\t"
|
|
|
3973 |
// preload "movl row, %%edi \n\t"
|
|
|
3974 |
// preload "movl prev_row, %%esi \n\t"
|
|
|
3975 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
3976 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
3977 |
"movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read
|
|
|
3978 |
// a=Raw(x-bpp) bytes
|
|
|
3979 |
"paeth_4lp: \n\t"
|
|
|
3980 |
// do first set of 4 bytes
|
|
|
3981 |
"movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|
|
3982 |
"punpckhbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|
|
3983 |
"movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|
|
3984 |
"punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|
|
3985 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
3986 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
3987 |
"punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|
|
3988 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
3989 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
3990 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
3991 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
3992 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
3993 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
3994 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
3995 |
// pa = abs(p-a) = abs(pav)
|
|
|
3996 |
// pb = abs(p-b) = abs(pbv)
|
|
|
3997 |
// pc = abs(p-c) = abs(pcv)
|
|
|
3998 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
3999 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
4000 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4001 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
4002 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4003 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
4004 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4005 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4006 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4007 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
4008 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4009 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4010 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4011 |
// test pa <= pb
|
|
|
4012 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
4013 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4014 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
4015 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
4016 |
// use mm7 mask to merge pa & pb
|
|
|
4017 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
4018 |
// use mm0 mask copy to merge a & b
|
|
|
4019 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
4020 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
4021 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
4022 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
4023 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
4024 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
4025 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
4026 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
4027 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
4028 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
4029 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
4030 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4031 |
"packuswb %%mm1, %%mm7 \n\t"
|
|
|
4032 |
"movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
|
|
|
4033 |
"pand _ActiveMask, %%mm7 \n\t"
|
|
|
4034 |
"movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1
|
|
|
4035 |
"paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|
|
4036 |
"punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|
|
4037 |
"movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
4038 |
"movq %%mm7, %%mm1 \n\t" // now mm1 will be used as Raw(x-bpp)
|
|
|
4039 |
// do second set of 4 bytes
|
|
|
4040 |
"punpckhbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
|
|
|
4041 |
"punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|
|
4042 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
4043 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
4044 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
4045 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
4046 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
4047 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
4048 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
4049 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
4050 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
4051 |
// pa = abs(p-a) = abs(pav)
|
|
|
4052 |
// pb = abs(p-b) = abs(pbv)
|
|
|
4053 |
// pc = abs(p-c) = abs(pcv)
|
|
|
4054 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
4055 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
4056 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4057 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
4058 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4059 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
4060 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4061 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4062 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4063 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
4064 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4065 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4066 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4067 |
// test pa <= pb
|
|
|
4068 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
4069 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4070 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
4071 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
4072 |
// use mm7 mask to merge pa & pb
|
|
|
4073 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
4074 |
// use mm0 mask copy to merge a & b
|
|
|
4075 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
4076 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
4077 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
4078 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
4079 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
4080 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
4081 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
4082 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
4083 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
4084 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
4085 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
4086 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
4087 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4088 |
// step ecx to next set of 8 bytes and repeat loop til done
|
|
|
4089 |
"addl $8, %%ecx \n\t"
|
|
|
4090 |
"packuswb %%mm7, %%mm1 \n\t"
|
|
|
4091 |
"paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add predictor with Raw(x)
|
|
|
4092 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
4093 |
"movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
4094 |
// mm1 will be used as Raw(x-bpp) next loop
|
|
|
4095 |
"jb paeth_4lp \n\t"
|
|
|
4096 |
|
|
|
4097 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
4098 |
"=D" (dummy_value_D)
|
|
|
4099 |
|
|
|
4100 |
: "0" (prev_row), // esi // input regs
|
|
|
4101 |
"1" (row) // edi
|
|
|
4102 |
|
|
|
4103 |
: "%ecx" // clobber list
|
|
|
4104 |
#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4105 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
4106 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
4107 |
#endif
|
|
|
4108 |
);
|
|
|
4109 |
}
|
|
|
4110 |
break; // end 4 bpp
|
|
|
4111 |
|
|
|
4112 |
case 8: // bpp == 8
|
|
|
4113 |
{
|
|
|
4114 |
_ActiveMask.use = 0x00000000ffffffffLL;
|
|
|
4115 |
|
|
|
4116 |
__asm__ __volatile__ (
|
|
|
4117 |
"movl _dif, %%ecx \n\t"
|
|
|
4118 |
// preload "movl row, %%edi \n\t"
|
|
|
4119 |
// preload "movl prev_row, %%esi \n\t"
|
|
|
4120 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4121 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
4122 |
"movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read
|
|
|
4123 |
// a=Raw(x-bpp) bytes
|
|
|
4124 |
"paeth_8lp: \n\t"
|
|
|
4125 |
// do first set of 4 bytes
|
|
|
4126 |
"movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|
|
4127 |
"punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|
|
4128 |
"movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|
|
4129 |
"punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
|
|
|
4130 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
4131 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
4132 |
"punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c
|
|
|
4133 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
4134 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
4135 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
4136 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
4137 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
4138 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
4139 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
4140 |
// pa = abs(p-a) = abs(pav)
|
|
|
4141 |
// pb = abs(p-b) = abs(pbv)
|
|
|
4142 |
// pc = abs(p-c) = abs(pcv)
|
|
|
4143 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
4144 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
4145 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4146 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
4147 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4148 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
4149 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4150 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4151 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4152 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
4153 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4154 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4155 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4156 |
// test pa <= pb
|
|
|
4157 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
4158 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4159 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
4160 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
4161 |
// use mm7 mask to merge pa & pb
|
|
|
4162 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
4163 |
// use mm0 mask copy to merge a & b
|
|
|
4164 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
4165 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
4166 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
4167 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
4168 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
4169 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
4170 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
4171 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
4172 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
4173 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
4174 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
4175 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4176 |
"packuswb %%mm1, %%mm7 \n\t"
|
|
|
4177 |
"movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|
|
4178 |
"pand _ActiveMask, %%mm7 \n\t"
|
|
|
4179 |
"movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|
|
4180 |
"paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|
|
4181 |
"punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|
|
4182 |
"movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
4183 |
"movq -8(%%edi,%%ecx,), %%mm1 \n\t" // read a=Raw(x-bpp) bytes
|
|
|
4184 |
|
|
|
4185 |
// do second set of 4 bytes
|
|
|
4186 |
"punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|
|
4187 |
"punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|
|
4188 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
4189 |
"movq %%mm2, %%mm4 \n\t"
|
|
|
4190 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
4191 |
"movq %%mm1, %%mm5 \n\t"
|
|
|
4192 |
"psubw %%mm3, %%mm4 \n\t"
|
|
|
4193 |
"pxor %%mm7, %%mm7 \n\t"
|
|
|
4194 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
4195 |
"movq %%mm4, %%mm6 \n\t"
|
|
|
4196 |
"psubw %%mm3, %%mm5 \n\t"
|
|
|
4197 |
// pa = abs(p-a) = abs(pav)
|
|
|
4198 |
// pb = abs(p-b) = abs(pbv)
|
|
|
4199 |
// pc = abs(p-c) = abs(pcv)
|
|
|
4200 |
"pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|
|
4201 |
"paddw %%mm5, %%mm6 \n\t"
|
|
|
4202 |
"pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4203 |
"pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|
|
4204 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4205 |
"pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|
|
4206 |
"psubw %%mm0, %%mm4 \n\t"
|
|
|
4207 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4208 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4209 |
"pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|
|
4210 |
"pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|
|
4211 |
"psubw %%mm7, %%mm5 \n\t"
|
|
|
4212 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4213 |
// test pa <= pb
|
|
|
4214 |
"movq %%mm4, %%mm7 \n\t"
|
|
|
4215 |
"psubw %%mm0, %%mm6 \n\t"
|
|
|
4216 |
"pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|
|
4217 |
"movq %%mm7, %%mm0 \n\t"
|
|
|
4218 |
// use mm7 mask to merge pa & pb
|
|
|
4219 |
"pand %%mm7, %%mm5 \n\t"
|
|
|
4220 |
// use mm0 mask copy to merge a & b
|
|
|
4221 |
"pand %%mm0, %%mm2 \n\t"
|
|
|
4222 |
"pandn %%mm4, %%mm7 \n\t"
|
|
|
4223 |
"pandn %%mm1, %%mm0 \n\t"
|
|
|
4224 |
"paddw %%mm5, %%mm7 \n\t"
|
|
|
4225 |
"paddw %%mm2, %%mm0 \n\t"
|
|
|
4226 |
// test ((pa <= pb)? pa:pb) <= pc
|
|
|
4227 |
"pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|
|
4228 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
4229 |
"pand %%mm7, %%mm3 \n\t"
|
|
|
4230 |
"pandn %%mm0, %%mm7 \n\t"
|
|
|
4231 |
"pxor %%mm1, %%mm1 \n\t"
|
|
|
4232 |
"paddw %%mm3, %%mm7 \n\t"
|
|
|
4233 |
"pxor %%mm0, %%mm0 \n\t"
|
|
|
4234 |
// step ecx to next set of 8 bytes and repeat loop til done
|
|
|
4235 |
"addl $8, %%ecx \n\t"
|
|
|
4236 |
"packuswb %%mm7, %%mm1 \n\t"
|
|
|
4237 |
"paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x)
|
|
|
4238 |
"cmpl _MMXLength, %%ecx \n\t"
|
|
|
4239 |
"movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|
|
4240 |
// mm1 will be used as Raw(x-bpp) next loop
|
|
|
4241 |
"jb paeth_8lp \n\t"
|
|
|
4242 |
|
|
|
4243 |
: "=S" (dummy_value_S), // output regs (dummy)
|
|
|
4244 |
"=D" (dummy_value_D)
|
|
|
4245 |
|
|
|
4246 |
: "0" (prev_row), // esi // input regs
|
|
|
4247 |
"1" (row) // edi
|
|
|
4248 |
|
|
|
4249 |
: "%ecx" // clobber list
|
|
|
4250 |
#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4251 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
4252 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
4253 |
#endif
|
|
|
4254 |
);
|
|
|
4255 |
}
|
|
|
4256 |
break; // end 8 bpp
|
|
|
4257 |
|
|
|
4258 |
case 1: // bpp = 1
|
|
|
4259 |
case 2: // bpp = 2
|
|
|
4260 |
default: // bpp > 8
|
|
|
4261 |
{
|
|
|
4262 |
__asm__ __volatile__ (
|
|
|
4263 |
#ifdef __PIC__
|
|
|
4264 |
"pushl %%ebx \n\t" // save Global Offset Table index
|
|
|
4265 |
#endif
|
|
|
4266 |
"movl _dif, %%ebx \n\t"
|
|
|
4267 |
"cmpl _FullLength, %%ebx \n\t"
|
|
|
4268 |
"jnb paeth_dend \n\t"
|
|
|
4269 |
|
|
|
4270 |
// preload "movl row, %%edi \n\t"
|
|
|
4271 |
// preload "movl prev_row, %%esi \n\t"
|
|
|
4272 |
// do Paeth decode for remaining bytes
|
|
|
4273 |
"movl %%ebx, %%edx \n\t"
|
|
|
4274 |
// preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|
|
4275 |
"subl %%ecx, %%edx \n\t" // edx = ebx - bpp
|
|
|
4276 |
"xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx
|
|
|
4277 |
|
|
|
4278 |
"paeth_dlp: \n\t"
|
|
|
4279 |
"xorl %%eax, %%eax \n\t"
|
|
|
4280 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
4281 |
"movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
|
|
|
4282 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
4283 |
"subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|
|
4284 |
"movl %%eax, _patemp \n\t" // Save pav for later use
|
|
|
4285 |
"xorl %%eax, %%eax \n\t"
|
|
|
4286 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
4287 |
"movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
|
|
|
4288 |
"subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|
|
4289 |
"movl %%eax, %%ecx \n\t"
|
|
|
4290 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
4291 |
"addl _patemp, %%eax \n\t" // pcv = pav + pbv
|
|
|
4292 |
// pc = abs(pcv)
|
|
|
4293 |
"testl $0x80000000, %%eax \n\t"
|
|
|
4294 |
"jz paeth_dpca \n\t"
|
|
|
4295 |
"negl %%eax \n\t" // reverse sign of neg values
|
|
|
4296 |
|
|
|
4297 |
"paeth_dpca: \n\t"
|
|
|
4298 |
"movl %%eax, _pctemp \n\t" // save pc for later use
|
|
|
4299 |
// pb = abs(pbv)
|
|
|
4300 |
"testl $0x80000000, %%ecx \n\t"
|
|
|
4301 |
"jz paeth_dpba \n\t"
|
|
|
4302 |
"negl %%ecx \n\t" // reverse sign of neg values
|
|
|
4303 |
|
|
|
4304 |
"paeth_dpba: \n\t"
|
|
|
4305 |
"movl %%ecx, _pbtemp \n\t" // save pb for later use
|
|
|
4306 |
// pa = abs(pav)
|
|
|
4307 |
"movl _patemp, %%eax \n\t"
|
|
|
4308 |
"testl $0x80000000, %%eax \n\t"
|
|
|
4309 |
"jz paeth_dpaa \n\t"
|
|
|
4310 |
"negl %%eax \n\t" // reverse sign of neg values
|
|
|
4311 |
|
|
|
4312 |
"paeth_dpaa: \n\t"
|
|
|
4313 |
"movl %%eax, _patemp \n\t" // save pa for later use
|
|
|
4314 |
// test if pa <= pb
|
|
|
4315 |
"cmpl %%ecx, %%eax \n\t"
|
|
|
4316 |
"jna paeth_dabb \n\t"
|
|
|
4317 |
// pa > pb; now test if pb <= pc
|
|
|
4318 |
"cmpl _pctemp, %%ecx \n\t"
|
|
|
4319 |
"jna paeth_dbbc \n\t"
|
|
|
4320 |
// pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|
|
4321 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
4322 |
"jmp paeth_dpaeth \n\t"
|
|
|
4323 |
|
|
|
4324 |
"paeth_dbbc: \n\t"
|
|
|
4325 |
// pb <= pc; Raw(x) = Paeth(x) + Prior(x)
|
|
|
4326 |
"movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
|
|
|
4327 |
"jmp paeth_dpaeth \n\t"
|
|
|
4328 |
|
|
|
4329 |
"paeth_dabb: \n\t"
|
|
|
4330 |
// pa <= pb; now test if pa <= pc
|
|
|
4331 |
"cmpl _pctemp, %%eax \n\t"
|
|
|
4332 |
"jna paeth_dabc \n\t"
|
|
|
4333 |
// pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|
|
4334 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
4335 |
"jmp paeth_dpaeth \n\t"
|
|
|
4336 |
|
|
|
4337 |
"paeth_dabc: \n\t"
|
|
|
4338 |
// pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
|
|
|
4339 |
"movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
|
|
|
4340 |
|
|
|
4341 |
"paeth_dpaeth: \n\t"
|
|
|
4342 |
"incl %%ebx \n\t"
|
|
|
4343 |
"incl %%edx \n\t"
|
|
|
4344 |
// Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
|
|
|
4345 |
"addb %%cl, -1(%%edi,%%ebx,) \n\t"
|
|
|
4346 |
"cmpl _FullLength, %%ebx \n\t"
|
|
|
4347 |
"jb paeth_dlp \n\t"
|
|
|
4348 |
|
|
|
4349 |
"paeth_dend: \n\t"
|
|
|
4350 |
#ifdef __PIC__
|
|
|
4351 |
"popl %%ebx \n\t" // index to Global Offset Table
|
|
|
4352 |
#endif
|
|
|
4353 |
|
|
|
4354 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
4355 |
"=S" (dummy_value_S),
|
|
|
4356 |
"=D" (dummy_value_D)
|
|
|
4357 |
|
|
|
4358 |
: "0" (bpp), // ecx // input regs
|
|
|
4359 |
"1" (prev_row), // esi
|
|
|
4360 |
"2" (row) // edi
|
|
|
4361 |
|
|
|
4362 |
: "%eax", "%edx" // clobber list
|
|
|
4363 |
#ifndef __PIC__
|
|
|
4364 |
, "%ebx"
|
|
|
4365 |
#endif
|
|
|
4366 |
);
|
|
|
4367 |
}
|
|
|
4368 |
return; // No need to go further with this one
|
|
|
4369 |
|
|
|
4370 |
} // end switch (bpp)
|
|
|
4371 |
|
|
|
4372 |
__asm__ __volatile__ (
|
|
|
4373 |
// MMX acceleration complete; now do clean-up
|
|
|
4374 |
// check if any remaining bytes left to decode
|
|
|
4375 |
#ifdef __PIC__
|
|
|
4376 |
"pushl %%ebx \n\t" // save index to Global Offset Table
|
|
|
4377 |
#endif
|
|
|
4378 |
"movl _MMXLength, %%ebx \n\t"
|
|
|
4379 |
"cmpl _FullLength, %%ebx \n\t"
|
|
|
4380 |
"jnb paeth_end \n\t"
|
|
|
4381 |
//pre "movl row, %%edi \n\t"
|
|
|
4382 |
//pre "movl prev_row, %%esi \n\t"
|
|
|
4383 |
// do Paeth decode for remaining bytes
|
|
|
4384 |
"movl %%ebx, %%edx \n\t"
|
|
|
4385 |
//pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|
|
4386 |
"subl %%ecx, %%edx \n\t" // edx = ebx - bpp
|
|
|
4387 |
"xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below
|
|
|
4388 |
|
|
|
4389 |
"paeth_lp2: \n\t"
|
|
|
4390 |
"xorl %%eax, %%eax \n\t"
|
|
|
4391 |
// pav = p - a = (a + b - c) - a = b - c
|
|
|
4392 |
"movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
|
|
|
4393 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
4394 |
"subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|
|
4395 |
"movl %%eax, _patemp \n\t" // Save pav for later use
|
|
|
4396 |
"xorl %%eax, %%eax \n\t"
|
|
|
4397 |
// pbv = p - b = (a + b - c) - b = a - c
|
|
|
4398 |
"movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
|
|
|
4399 |
"subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|
|
4400 |
"movl %%eax, %%ecx \n\t"
|
|
|
4401 |
// pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|
|
4402 |
"addl _patemp, %%eax \n\t" // pcv = pav + pbv
|
|
|
4403 |
// pc = abs(pcv)
|
|
|
4404 |
"testl $0x80000000, %%eax \n\t"
|
|
|
4405 |
"jz paeth_pca2 \n\t"
|
|
|
4406 |
"negl %%eax \n\t" // reverse sign of neg values
|
|
|
4407 |
|
|
|
4408 |
"paeth_pca2: \n\t"
|
|
|
4409 |
"movl %%eax, _pctemp \n\t" // save pc for later use
|
|
|
4410 |
// pb = abs(pbv)
|
|
|
4411 |
"testl $0x80000000, %%ecx \n\t"
|
|
|
4412 |
"jz paeth_pba2 \n\t"
|
|
|
4413 |
"negl %%ecx \n\t" // reverse sign of neg values
|
|
|
4414 |
|
|
|
4415 |
"paeth_pba2: \n\t"
|
|
|
4416 |
"movl %%ecx, _pbtemp \n\t" // save pb for later use
|
|
|
4417 |
// pa = abs(pav)
|
|
|
4418 |
"movl _patemp, %%eax \n\t"
|
|
|
4419 |
"testl $0x80000000, %%eax \n\t"
|
|
|
4420 |
"jz paeth_paa2 \n\t"
|
|
|
4421 |
"negl %%eax \n\t" // reverse sign of neg values
|
|
|
4422 |
|
|
|
4423 |
"paeth_paa2: \n\t"
|
|
|
4424 |
"movl %%eax, _patemp \n\t" // save pa for later use
|
|
|
4425 |
// test if pa <= pb
|
|
|
4426 |
"cmpl %%ecx, %%eax \n\t"
|
|
|
4427 |
"jna paeth_abb2 \n\t"
|
|
|
4428 |
// pa > pb; now test if pb <= pc
|
|
|
4429 |
"cmpl _pctemp, %%ecx \n\t"
|
|
|
4430 |
"jna paeth_bbc2 \n\t"
|
|
|
4431 |
// pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|
|
4432 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
4433 |
"jmp paeth_paeth2 \n\t"
|
|
|
4434 |
|
|
|
4435 |
"paeth_bbc2: \n\t"
|
|
|
4436 |
// pb <= pc; Raw(x) = Paeth(x) + Prior(x)
|
|
|
4437 |
"movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
|
|
|
4438 |
"jmp paeth_paeth2 \n\t"
|
|
|
4439 |
|
|
|
4440 |
"paeth_abb2: \n\t"
|
|
|
4441 |
// pa <= pb; now test if pa <= pc
|
|
|
4442 |
"cmpl _pctemp, %%eax \n\t"
|
|
|
4443 |
"jna paeth_abc2 \n\t"
|
|
|
4444 |
// pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|
|
4445 |
"movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|
|
4446 |
"jmp paeth_paeth2 \n\t"
|
|
|
4447 |
|
|
|
4448 |
"paeth_abc2: \n\t"
|
|
|
4449 |
// pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
|
|
|
4450 |
"movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
|
|
|
4451 |
|
|
|
4452 |
"paeth_paeth2: \n\t"
|
|
|
4453 |
"incl %%ebx \n\t"
|
|
|
4454 |
"incl %%edx \n\t"
|
|
|
4455 |
// Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
|
|
|
4456 |
"addb %%cl, -1(%%edi,%%ebx,) \n\t"
|
|
|
4457 |
"cmpl _FullLength, %%ebx \n\t"
|
|
|
4458 |
"jb paeth_lp2 \n\t"
|
|
|
4459 |
|
|
|
4460 |
"paeth_end: \n\t"
|
|
|
4461 |
"EMMS \n\t" // end MMX; prep for poss. FP instrs.
|
|
|
4462 |
#ifdef __PIC__
|
|
|
4463 |
"popl %%ebx \n\t" // restore index to Global Offset Table
|
|
|
4464 |
#endif
|
|
|
4465 |
|
|
|
4466 |
: "=c" (dummy_value_c), // output regs (dummy)
|
|
|
4467 |
"=S" (dummy_value_S),
|
|
|
4468 |
"=D" (dummy_value_D)
|
|
|
4469 |
|
|
|
4470 |
: "0" (bpp), // ecx // input regs
|
|
|
4471 |
"1" (prev_row), // esi
|
|
|
4472 |
"2" (row) // edi
|
|
|
4473 |
|
|
|
4474 |
: "%eax", "%edx" // clobber list (no input regs!)
|
|
|
4475 |
#ifndef __PIC__
|
|
|
4476 |
, "%ebx"
|
|
|
4477 |
#endif
|
|
|
4478 |
);
|
|
|
4479 |
|
|
|
4480 |
} /* end png_read_filter_row_mmx_paeth() */
|
|
|
4481 |
#endif
|
|
|
4482 |
|
|
|
4483 |
|
|
|
4484 |
|
|
|
4485 |
|
|
|
4486 |
#ifdef PNG_THREAD_UNSAFE_OK
|
|
|
4487 |
//===========================================================================//
|
|
|
4488 |
// //
|
|
|
4489 |
// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ S U B //
|
|
|
4490 |
// //
|
|
|
4491 |
//===========================================================================//
|
|
|
4492 |
|
|
|
4493 |
// Optimized code for PNG Sub filter decoder
|
|
|
4494 |
|
|
|
4495 |
static void /* PRIVATE */
|
|
|
4496 |
png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
|
|
|
4497 |
{
|
|
|
4498 |
int bpp;
|
|
|
4499 |
int dummy_value_a;
|
|
|
4500 |
int dummy_value_D;
|
|
|
4501 |
|
|
|
4502 |
bpp = (row_info->pixel_depth + 7) >> 3; // calc number of bytes per pixel
|
|
|
4503 |
_FullLength = row_info->rowbytes - bpp; // number of bytes to filter
|
|
|
4504 |
|
|
|
4505 |
__asm__ __volatile__ (
|
|
|
4506 |
//pre "movl row, %%edi \n\t"
|
|
|
4507 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4508 |
//pre "movl bpp, %%eax \n\t"
|
|
|
4509 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4510 |
//irr "xorl %%eax, %%eax \n\t"
|
|
|
4511 |
// get # of bytes to alignment
|
|
|
4512 |
"movl %%edi, _dif \n\t" // take start of row
|
|
|
4513 |
"addl $0xf, _dif \n\t" // add 7 + 8 to incr past
|
|
|
4514 |
// alignment boundary
|
|
|
4515 |
"xorl %%ecx, %%ecx \n\t"
|
|
|
4516 |
"andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
|
|
|
4517 |
"subl %%edi, _dif \n\t" // subtract from start ==> value
|
|
|
4518 |
"jz sub_go \n\t" // ecx at alignment
|
|
|
4519 |
|
|
|
4520 |
"sub_lp1: \n\t" // fix alignment
|
|
|
4521 |
"movb (%%esi,%%ecx,), %%al \n\t"
|
|
|
4522 |
"addb %%al, (%%edi,%%ecx,) \n\t"
|
|
|
4523 |
"incl %%ecx \n\t"
|
|
|
4524 |
"cmpl _dif, %%ecx \n\t"
|
|
|
4525 |
"jb sub_lp1 \n\t"
|
|
|
4526 |
|
|
|
4527 |
"sub_go: \n\t"
|
|
|
4528 |
"movl _FullLength, %%eax \n\t"
|
|
|
4529 |
"movl %%eax, %%edx \n\t"
|
|
|
4530 |
"subl %%ecx, %%edx \n\t" // subtract alignment fix
|
|
|
4531 |
"andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8
|
|
|
4532 |
"subl %%edx, %%eax \n\t" // drop over bytes from length
|
|
|
4533 |
"movl %%eax, _MMXLength \n\t"
|
|
|
4534 |
|
|
|
4535 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4536 |
"=D" (dummy_value_D) // 1
|
|
|
4537 |
|
|
|
4538 |
: "0" (bpp), // eax // input regs
|
|
|
4539 |
"1" (row) // edi
|
|
|
4540 |
|
|
|
4541 |
: "%esi", "%ecx", "%edx" // clobber list
|
|
|
4542 |
|
|
|
4543 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4544 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
4545 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
4546 |
#endif
|
|
|
4547 |
);
|
|
|
4548 |
|
|
|
4549 |
// now do the math for the rest of the row
|
|
|
4550 |
switch (bpp)
|
|
|
4551 |
{
|
|
|
4552 |
case 3:
|
|
|
4553 |
{
|
|
|
4554 |
_ActiveMask.use = 0x0000ffffff000000LL;
|
|
|
4555 |
_ShiftBpp.use = 24; // == 3 * 8
|
|
|
4556 |
_ShiftRem.use = 40; // == 64 - 24
|
|
|
4557 |
|
|
|
4558 |
__asm__ __volatile__ (
|
|
|
4559 |
// preload "movl row, %%edi \n\t"
|
|
|
4560 |
"movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd
|
|
|
4561 |
// active byte group
|
|
|
4562 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4563 |
// preload "movl bpp, %%eax \n\t"
|
|
|
4564 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4565 |
"movq %%mm7, %%mm6 \n\t"
|
|
|
4566 |
"movl _dif, %%edx \n\t"
|
|
|
4567 |
"psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover
|
|
|
4568 |
// 3rd active byte group
|
|
|
4569 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
4570 |
"movq -8(%%edi,%%edx,), %%mm1 \n\t"
|
|
|
4571 |
|
|
|
4572 |
"sub_3lp: \n\t" // shift data for adding first
|
|
|
4573 |
"psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
|
|
|
4574 |
// shift clears inactive bytes)
|
|
|
4575 |
// add 1st active group
|
|
|
4576 |
"movq (%%edi,%%edx,), %%mm0 \n\t"
|
|
|
4577 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4578 |
|
|
|
4579 |
// add 2nd active group
|
|
|
4580 |
"movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|
|
4581 |
"psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|
|
4582 |
"pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group
|
|
|
4583 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4584 |
|
|
|
4585 |
// add 3rd active group
|
|
|
4586 |
"movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|
|
4587 |
"psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|
|
4588 |
"pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group
|
|
|
4589 |
"addl $8, %%edx \n\t"
|
|
|
4590 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4591 |
|
|
|
4592 |
"cmpl _MMXLength, %%edx \n\t"
|
|
|
4593 |
"movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array
|
|
|
4594 |
"movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
|
|
|
4595 |
"jb sub_3lp \n\t"
|
|
|
4596 |
|
|
|
4597 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4598 |
"=D" (dummy_value_D) // 1
|
|
|
4599 |
|
|
|
4600 |
: "0" (bpp), // eax // input regs
|
|
|
4601 |
"1" (row) // edi
|
|
|
4602 |
|
|
|
4603 |
: "%edx", "%esi" // clobber list
|
|
|
4604 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4605 |
, "%mm0", "%mm1", "%mm6", "%mm7"
|
|
|
4606 |
#endif
|
|
|
4607 |
);
|
|
|
4608 |
}
|
|
|
4609 |
break;
|
|
|
4610 |
|
|
|
4611 |
case 1:
|
|
|
4612 |
{
|
|
|
4613 |
__asm__ __volatile__ (
|
|
|
4614 |
"movl _dif, %%edx \n\t"
|
|
|
4615 |
// preload "movl row, %%edi \n\t"
|
|
|
4616 |
"cmpl _FullLength, %%edx \n\t"
|
|
|
4617 |
"jnb sub_1end \n\t"
|
|
|
4618 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4619 |
"xorl %%eax, %%eax \n\t"
|
|
|
4620 |
// preload "movl bpp, %%eax \n\t"
|
|
|
4621 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4622 |
|
|
|
4623 |
"sub_1lp: \n\t"
|
|
|
4624 |
"movb (%%esi,%%edx,), %%al \n\t"
|
|
|
4625 |
"addb %%al, (%%edi,%%edx,) \n\t"
|
|
|
4626 |
"incl %%edx \n\t"
|
|
|
4627 |
"cmpl _FullLength, %%edx \n\t"
|
|
|
4628 |
"jb sub_1lp \n\t"
|
|
|
4629 |
|
|
|
4630 |
"sub_1end: \n\t"
|
|
|
4631 |
|
|
|
4632 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4633 |
"=D" (dummy_value_D) // 1
|
|
|
4634 |
|
|
|
4635 |
: "0" (bpp), // eax // input regs
|
|
|
4636 |
"1" (row) // edi
|
|
|
4637 |
|
|
|
4638 |
: "%edx", "%esi" // clobber list
|
|
|
4639 |
);
|
|
|
4640 |
}
|
|
|
4641 |
return;
|
|
|
4642 |
|
|
|
4643 |
case 6:
|
|
|
4644 |
case 4:
|
|
|
4645 |
//case 7: // GRR BOGUS
|
|
|
4646 |
//case 5: // GRR BOGUS
|
|
|
4647 |
{
|
|
|
4648 |
_ShiftBpp.use = bpp << 3;
|
|
|
4649 |
_ShiftRem.use = 64 - _ShiftBpp.use;
|
|
|
4650 |
|
|
|
4651 |
__asm__ __volatile__ (
|
|
|
4652 |
// preload "movl row, %%edi \n\t"
|
|
|
4653 |
"movl _dif, %%edx \n\t"
|
|
|
4654 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4655 |
// preload "movl bpp, %%eax \n\t"
|
|
|
4656 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4657 |
|
|
|
4658 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
4659 |
"movq -8(%%edi,%%edx,), %%mm1 \n\t"
|
|
|
4660 |
|
|
|
4661 |
"sub_4lp: \n\t" // shift data for adding first
|
|
|
4662 |
"psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
|
|
|
4663 |
// shift clears inactive bytes)
|
|
|
4664 |
"movq (%%edi,%%edx,), %%mm0 \n\t"
|
|
|
4665 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4666 |
|
|
|
4667 |
// add 2nd active group
|
|
|
4668 |
"movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|
|
4669 |
"psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|
|
4670 |
"addl $8, %%edx \n\t"
|
|
|
4671 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4672 |
|
|
|
4673 |
"cmpl _MMXLength, %%edx \n\t"
|
|
|
4674 |
"movq %%mm0, -8(%%edi,%%edx,) \n\t"
|
|
|
4675 |
"movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
|
|
|
4676 |
"jb sub_4lp \n\t"
|
|
|
4677 |
|
|
|
4678 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4679 |
"=D" (dummy_value_D) // 1
|
|
|
4680 |
|
|
|
4681 |
: "0" (bpp), // eax // input regs
|
|
|
4682 |
"1" (row) // edi
|
|
|
4683 |
|
|
|
4684 |
: "%edx", "%esi" // clobber list
|
|
|
4685 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4686 |
, "%mm0", "%mm1"
|
|
|
4687 |
#endif
|
|
|
4688 |
);
|
|
|
4689 |
}
|
|
|
4690 |
break;
|
|
|
4691 |
|
|
|
4692 |
case 2:
|
|
|
4693 |
{
|
|
|
4694 |
_ActiveMask.use = 0x00000000ffff0000LL;
|
|
|
4695 |
_ShiftBpp.use = 16; // == 2 * 8
|
|
|
4696 |
_ShiftRem.use = 48; // == 64 - 16
|
|
|
4697 |
|
|
|
4698 |
__asm__ __volatile__ (
|
|
|
4699 |
"movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd
|
|
|
4700 |
// active byte group
|
|
|
4701 |
"movl _dif, %%edx \n\t"
|
|
|
4702 |
"movq %%mm7, %%mm6 \n\t"
|
|
|
4703 |
// preload "movl row, %%edi \n\t"
|
|
|
4704 |
"psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover
|
|
|
4705 |
// 3rd active byte group
|
|
|
4706 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4707 |
"movq %%mm6, %%mm5 \n\t"
|
|
|
4708 |
// preload "movl bpp, %%eax \n\t"
|
|
|
4709 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4710 |
"psllq _ShiftBpp, %%mm5 \n\t" // move mask in mm5 to cover
|
|
|
4711 |
// 4th active byte group
|
|
|
4712 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
4713 |
"movq -8(%%edi,%%edx,), %%mm1 \n\t"
|
|
|
4714 |
|
|
|
4715 |
"sub_2lp: \n\t" // shift data for adding first
|
|
|
4716 |
"psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
|
|
|
4717 |
// shift clears inactive bytes)
|
|
|
4718 |
// add 1st active group
|
|
|
4719 |
"movq (%%edi,%%edx,), %%mm0 \n\t"
|
|
|
4720 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4721 |
|
|
|
4722 |
// add 2nd active group
|
|
|
4723 |
"movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|
|
4724 |
"psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|
|
4725 |
"pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group
|
|
|
4726 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4727 |
|
|
|
4728 |
// add 3rd active group
|
|
|
4729 |
"movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|
|
4730 |
"psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|
|
4731 |
"pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group
|
|
|
4732 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4733 |
|
|
|
4734 |
// add 4th active group
|
|
|
4735 |
"movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|
|
4736 |
"psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|
|
4737 |
"pand %%mm5, %%mm1 \n\t" // mask to use 4th active group
|
|
|
4738 |
"addl $8, %%edx \n\t"
|
|
|
4739 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4740 |
"cmpl _MMXLength, %%edx \n\t"
|
|
|
4741 |
"movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array
|
|
|
4742 |
"movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
|
|
|
4743 |
"jb sub_2lp \n\t"
|
|
|
4744 |
|
|
|
4745 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4746 |
"=D" (dummy_value_D) // 1
|
|
|
4747 |
|
|
|
4748 |
: "0" (bpp), // eax // input regs
|
|
|
4749 |
"1" (row) // edi
|
|
|
4750 |
|
|
|
4751 |
: "%edx", "%esi" // clobber list
|
|
|
4752 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4753 |
, "%mm0", "%mm1", "%mm5", "%mm6", "%mm7"
|
|
|
4754 |
#endif
|
|
|
4755 |
);
|
|
|
4756 |
}
|
|
|
4757 |
break;
|
|
|
4758 |
|
|
|
4759 |
case 8:
|
|
|
4760 |
{
|
|
|
4761 |
__asm__ __volatile__ (
|
|
|
4762 |
// preload "movl row, %%edi \n\t"
|
|
|
4763 |
"movl _dif, %%edx \n\t"
|
|
|
4764 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4765 |
// preload "movl bpp, %%eax \n\t"
|
|
|
4766 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4767 |
"movl _MMXLength, %%ecx \n\t"
|
|
|
4768 |
|
|
|
4769 |
// prime the pump: load the first Raw(x-bpp) data set
|
|
|
4770 |
"movq -8(%%edi,%%edx,), %%mm7 \n\t"
|
|
|
4771 |
"andl $0x0000003f, %%ecx \n\t" // calc bytes over mult of 64
|
|
|
4772 |
|
|
|
4773 |
"sub_8lp: \n\t"
|
|
|
4774 |
"movq (%%edi,%%edx,), %%mm0 \n\t" // load Sub(x) for 1st 8 bytes
|
|
|
4775 |
"paddb %%mm7, %%mm0 \n\t"
|
|
|
4776 |
"movq 8(%%edi,%%edx,), %%mm1 \n\t" // load Sub(x) for 2nd 8 bytes
|
|
|
4777 |
"movq %%mm0, (%%edi,%%edx,) \n\t" // write Raw(x) for 1st 8 bytes
|
|
|
4778 |
|
|
|
4779 |
// Now mm0 will be used as Raw(x-bpp) for the 2nd group of 8 bytes.
|
|
|
4780 |
// This will be repeated for each group of 8 bytes with the 8th
|
|
|
4781 |
// group being used as the Raw(x-bpp) for the 1st group of the
|
|
|
4782 |
// next loop.
|
|
|
4783 |
|
|
|
4784 |
"paddb %%mm0, %%mm1 \n\t"
|
|
|
4785 |
"movq 16(%%edi,%%edx,), %%mm2 \n\t" // load Sub(x) for 3rd 8 bytes
|
|
|
4786 |
"movq %%mm1, 8(%%edi,%%edx,) \n\t" // write Raw(x) for 2nd 8 bytes
|
|
|
4787 |
"paddb %%mm1, %%mm2 \n\t"
|
|
|
4788 |
"movq 24(%%edi,%%edx,), %%mm3 \n\t" // load Sub(x) for 4th 8 bytes
|
|
|
4789 |
"movq %%mm2, 16(%%edi,%%edx,) \n\t" // write Raw(x) for 3rd 8 bytes
|
|
|
4790 |
"paddb %%mm2, %%mm3 \n\t"
|
|
|
4791 |
"movq 32(%%edi,%%edx,), %%mm4 \n\t" // load Sub(x) for 5th 8 bytes
|
|
|
4792 |
"movq %%mm3, 24(%%edi,%%edx,) \n\t" // write Raw(x) for 4th 8 bytes
|
|
|
4793 |
"paddb %%mm3, %%mm4 \n\t"
|
|
|
4794 |
"movq 40(%%edi,%%edx,), %%mm5 \n\t" // load Sub(x) for 6th 8 bytes
|
|
|
4795 |
"movq %%mm4, 32(%%edi,%%edx,) \n\t" // write Raw(x) for 5th 8 bytes
|
|
|
4796 |
"paddb %%mm4, %%mm5 \n\t"
|
|
|
4797 |
"movq 48(%%edi,%%edx,), %%mm6 \n\t" // load Sub(x) for 7th 8 bytes
|
|
|
4798 |
"movq %%mm5, 40(%%edi,%%edx,) \n\t" // write Raw(x) for 6th 8 bytes
|
|
|
4799 |
"paddb %%mm5, %%mm6 \n\t"
|
|
|
4800 |
"movq 56(%%edi,%%edx,), %%mm7 \n\t" // load Sub(x) for 8th 8 bytes
|
|
|
4801 |
"movq %%mm6, 48(%%edi,%%edx,) \n\t" // write Raw(x) for 7th 8 bytes
|
|
|
4802 |
"addl $64, %%edx \n\t"
|
|
|
4803 |
"paddb %%mm6, %%mm7 \n\t"
|
|
|
4804 |
"cmpl %%ecx, %%edx \n\t"
|
|
|
4805 |
"movq %%mm7, -8(%%edi,%%edx,) \n\t" // write Raw(x) for 8th 8 bytes
|
|
|
4806 |
"jb sub_8lp \n\t"
|
|
|
4807 |
|
|
|
4808 |
"cmpl _MMXLength, %%edx \n\t"
|
|
|
4809 |
"jnb sub_8lt8 \n\t"
|
|
|
4810 |
|
|
|
4811 |
"sub_8lpA: \n\t"
|
|
|
4812 |
"movq (%%edi,%%edx,), %%mm0 \n\t"
|
|
|
4813 |
"addl $8, %%edx \n\t"
|
|
|
4814 |
"paddb %%mm7, %%mm0 \n\t"
|
|
|
4815 |
"cmpl _MMXLength, %%edx \n\t"
|
|
|
4816 |
"movq %%mm0, -8(%%edi,%%edx,) \n\t" // -8 to offset early addl edx
|
|
|
4817 |
"movq %%mm0, %%mm7 \n\t" // move calculated Raw(x) data
|
|
|
4818 |
// to mm1 to be new Raw(x-bpp)
|
|
|
4819 |
// for next loop
|
|
|
4820 |
"jb sub_8lpA \n\t"
|
|
|
4821 |
|
|
|
4822 |
"sub_8lt8: \n\t"
|
|
|
4823 |
|
|
|
4824 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4825 |
"=D" (dummy_value_D) // 1
|
|
|
4826 |
|
|
|
4827 |
: "0" (bpp), // eax // input regs
|
|
|
4828 |
"1" (row) // edi
|
|
|
4829 |
|
|
|
4830 |
: "%ecx", "%edx", "%esi" // clobber list
|
|
|
4831 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4832 |
, "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
4833 |
#endif
|
|
|
4834 |
);
|
|
|
4835 |
}
|
|
|
4836 |
break;
|
|
|
4837 |
|
|
|
4838 |
default: // bpp greater than 8 bytes GRR BOGUS
|
|
|
4839 |
{
|
|
|
4840 |
__asm__ __volatile__ (
|
|
|
4841 |
"movl _dif, %%edx \n\t"
|
|
|
4842 |
// preload "movl row, %%edi \n\t"
|
|
|
4843 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4844 |
// preload "movl bpp, %%eax \n\t"
|
|
|
4845 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4846 |
|
|
|
4847 |
"sub_Alp: \n\t"
|
|
|
4848 |
"movq (%%edi,%%edx,), %%mm0 \n\t"
|
|
|
4849 |
"movq (%%esi,%%edx,), %%mm1 \n\t"
|
|
|
4850 |
"addl $8, %%edx \n\t"
|
|
|
4851 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4852 |
"cmpl _MMXLength, %%edx \n\t"
|
|
|
4853 |
"movq %%mm0, -8(%%edi,%%edx,) \n\t" // mov does not affect flags;
|
|
|
4854 |
// -8 to offset addl edx
|
|
|
4855 |
"jb sub_Alp \n\t"
|
|
|
4856 |
|
|
|
4857 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4858 |
"=D" (dummy_value_D) // 1
|
|
|
4859 |
|
|
|
4860 |
: "0" (bpp), // eax // input regs
|
|
|
4861 |
"1" (row) // edi
|
|
|
4862 |
|
|
|
4863 |
: "%edx", "%esi" // clobber list
|
|
|
4864 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
4865 |
, "%mm0", "%mm1"
|
|
|
4866 |
#endif
|
|
|
4867 |
);
|
|
|
4868 |
}
|
|
|
4869 |
break;
|
|
|
4870 |
|
|
|
4871 |
} // end switch (bpp)
|
|
|
4872 |
|
|
|
4873 |
__asm__ __volatile__ (
|
|
|
4874 |
"movl _MMXLength, %%edx \n\t"
|
|
|
4875 |
//pre "movl row, %%edi \n\t"
|
|
|
4876 |
"cmpl _FullLength, %%edx \n\t"
|
|
|
4877 |
"jnb sub_end \n\t"
|
|
|
4878 |
|
|
|
4879 |
"movl %%edi, %%esi \n\t" // lp = row
|
|
|
4880 |
//pre "movl bpp, %%eax \n\t"
|
|
|
4881 |
"addl %%eax, %%edi \n\t" // rp = row + bpp
|
|
|
4882 |
"xorl %%eax, %%eax \n\t"
|
|
|
4883 |
|
|
|
4884 |
"sub_lp2: \n\t"
|
|
|
4885 |
"movb (%%esi,%%edx,), %%al \n\t"
|
|
|
4886 |
"addb %%al, (%%edi,%%edx,) \n\t"
|
|
|
4887 |
"incl %%edx \n\t"
|
|
|
4888 |
"cmpl _FullLength, %%edx \n\t"
|
|
|
4889 |
"jb sub_lp2 \n\t"
|
|
|
4890 |
|
|
|
4891 |
"sub_end: \n\t"
|
|
|
4892 |
"EMMS \n\t" // end MMX instructions
|
|
|
4893 |
|
|
|
4894 |
: "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|
|
4895 |
"=D" (dummy_value_D) // 1
|
|
|
4896 |
|
|
|
4897 |
: "0" (bpp), // eax // input regs
|
|
|
4898 |
"1" (row) // edi
|
|
|
4899 |
|
|
|
4900 |
: "%edx", "%esi" // clobber list
|
|
|
4901 |
);
|
|
|
4902 |
|
|
|
4903 |
} // end of png_read_filter_row_mmx_sub()
|
|
|
4904 |
#endif
|
|
|
4905 |
|
|
|
4906 |
|
|
|
4907 |
|
|
|
4908 |
|
|
|
4909 |
//===========================================================================//
|
|
|
4910 |
// //
|
|
|
4911 |
// P N G _ R E A D _ F I L T E R _ R O W _ M M X _ U P //
|
|
|
4912 |
// //
|
|
|
4913 |
//===========================================================================//
|
|
|
4914 |
|
|
|
4915 |
// Optimized code for PNG Up filter decoder
|
|
|
4916 |
|
|
|
4917 |
static void /* PRIVATE */
|
|
|
4918 |
png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row,
|
|
|
4919 |
png_bytep prev_row)
|
|
|
4920 |
{
|
|
|
4921 |
png_uint_32 len;
|
|
|
4922 |
int dummy_value_d; // fix 'forbidden register 3 (dx) was spilled' error
|
|
|
4923 |
int dummy_value_S;
|
|
|
4924 |
int dummy_value_D;
|
|
|
4925 |
|
|
|
4926 |
len = row_info->rowbytes; // number of bytes to filter
|
|
|
4927 |
|
|
|
4928 |
__asm__ __volatile__ (
|
|
|
4929 |
//pre "movl row, %%edi \n\t"
|
|
|
4930 |
// get # of bytes to alignment
|
|
|
4931 |
#ifdef __PIC__
|
|
|
4932 |
"pushl %%ebx \n\t"
|
|
|
4933 |
#endif
|
|
|
4934 |
"movl %%edi, %%ecx \n\t"
|
|
|
4935 |
"xorl %%ebx, %%ebx \n\t"
|
|
|
4936 |
"addl $0x7, %%ecx \n\t"
|
|
|
4937 |
"xorl %%eax, %%eax \n\t"
|
|
|
4938 |
"andl $0xfffffff8, %%ecx \n\t"
|
|
|
4939 |
//pre "movl prev_row, %%esi \n\t"
|
|
|
4940 |
"subl %%edi, %%ecx \n\t"
|
|
|
4941 |
"jz up_go \n\t"
|
|
|
4942 |
|
|
|
4943 |
"up_lp1: \n\t" // fix alignment
|
|
|
4944 |
"movb (%%edi,%%ebx,), %%al \n\t"
|
|
|
4945 |
"addb (%%esi,%%ebx,), %%al \n\t"
|
|
|
4946 |
"incl %%ebx \n\t"
|
|
|
4947 |
"cmpl %%ecx, %%ebx \n\t"
|
|
|
4948 |
"movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to
|
|
|
4949 |
"jb up_lp1 \n\t" // offset incl ebx
|
|
|
4950 |
|
|
|
4951 |
"up_go: \n\t"
|
|
|
4952 |
//pre "movl len, %%edx \n\t"
|
|
|
4953 |
"movl %%edx, %%ecx \n\t"
|
|
|
4954 |
"subl %%ebx, %%edx \n\t" // subtract alignment fix
|
|
|
4955 |
"andl $0x0000003f, %%edx \n\t" // calc bytes over mult of 64
|
|
|
4956 |
"subl %%edx, %%ecx \n\t" // drop over bytes from length
|
|
|
4957 |
|
|
|
4958 |
// unrolled loop - use all MMX registers and interleave to reduce
|
|
|
4959 |
// number of branch instructions (loops) and reduce partial stalls
|
|
|
4960 |
"up_loop: \n\t"
|
|
|
4961 |
"movq (%%esi,%%ebx,), %%mm1 \n\t"
|
|
|
4962 |
"movq (%%edi,%%ebx,), %%mm0 \n\t"
|
|
|
4963 |
"movq 8(%%esi,%%ebx,), %%mm3 \n\t"
|
|
|
4964 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4965 |
"movq 8(%%edi,%%ebx,), %%mm2 \n\t"
|
|
|
4966 |
"movq %%mm0, (%%edi,%%ebx,) \n\t"
|
|
|
4967 |
"paddb %%mm3, %%mm2 \n\t"
|
|
|
4968 |
"movq 16(%%esi,%%ebx,), %%mm5 \n\t"
|
|
|
4969 |
"movq %%mm2, 8(%%edi,%%ebx,) \n\t"
|
|
|
4970 |
"movq 16(%%edi,%%ebx,), %%mm4 \n\t"
|
|
|
4971 |
"movq 24(%%esi,%%ebx,), %%mm7 \n\t"
|
|
|
4972 |
"paddb %%mm5, %%mm4 \n\t"
|
|
|
4973 |
"movq 24(%%edi,%%ebx,), %%mm6 \n\t"
|
|
|
4974 |
"movq %%mm4, 16(%%edi,%%ebx,) \n\t"
|
|
|
4975 |
"paddb %%mm7, %%mm6 \n\t"
|
|
|
4976 |
"movq 32(%%esi,%%ebx,), %%mm1 \n\t"
|
|
|
4977 |
"movq %%mm6, 24(%%edi,%%ebx,) \n\t"
|
|
|
4978 |
"movq 32(%%edi,%%ebx,), %%mm0 \n\t"
|
|
|
4979 |
"movq 40(%%esi,%%ebx,), %%mm3 \n\t"
|
|
|
4980 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
4981 |
"movq 40(%%edi,%%ebx,), %%mm2 \n\t"
|
|
|
4982 |
"movq %%mm0, 32(%%edi,%%ebx,) \n\t"
|
|
|
4983 |
"paddb %%mm3, %%mm2 \n\t"
|
|
|
4984 |
"movq 48(%%esi,%%ebx,), %%mm5 \n\t"
|
|
|
4985 |
"movq %%mm2, 40(%%edi,%%ebx,) \n\t"
|
|
|
4986 |
"movq 48(%%edi,%%ebx,), %%mm4 \n\t"
|
|
|
4987 |
"movq 56(%%esi,%%ebx,), %%mm7 \n\t"
|
|
|
4988 |
"paddb %%mm5, %%mm4 \n\t"
|
|
|
4989 |
"movq 56(%%edi,%%ebx,), %%mm6 \n\t"
|
|
|
4990 |
"movq %%mm4, 48(%%edi,%%ebx,) \n\t"
|
|
|
4991 |
"addl $64, %%ebx \n\t"
|
|
|
4992 |
"paddb %%mm7, %%mm6 \n\t"
|
|
|
4993 |
"cmpl %%ecx, %%ebx \n\t"
|
|
|
4994 |
"movq %%mm6, -8(%%edi,%%ebx,) \n\t" // (+56)movq does not affect flags;
|
|
|
4995 |
"jb up_loop \n\t" // -8 to offset addl ebx
|
|
|
4996 |
|
|
|
4997 |
"cmpl $0, %%edx \n\t" // test for bytes over mult of 64
|
|
|
4998 |
"jz up_end \n\t"
|
|
|
4999 |
|
|
|
5000 |
"cmpl $8, %%edx \n\t" // test for less than 8 bytes
|
|
|
5001 |
"jb up_lt8 \n\t" // [added by lcreeve at netins.net]
|
|
|
5002 |
|
|
|
5003 |
"addl %%edx, %%ecx \n\t"
|
|
|
5004 |
"andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8
|
|
|
5005 |
"subl %%edx, %%ecx \n\t" // drop over bytes from length
|
|
|
5006 |
"jz up_lt8 \n\t"
|
|
|
5007 |
|
|
|
5008 |
"up_lpA: \n\t" // use MMX regs to update 8 bytes sim.
|
|
|
5009 |
"movq (%%esi,%%ebx,), %%mm1 \n\t"
|
|
|
5010 |
"movq (%%edi,%%ebx,), %%mm0 \n\t"
|
|
|
5011 |
"addl $8, %%ebx \n\t"
|
|
|
5012 |
"paddb %%mm1, %%mm0 \n\t"
|
|
|
5013 |
"cmpl %%ecx, %%ebx \n\t"
|
|
|
5014 |
"movq %%mm0, -8(%%edi,%%ebx,) \n\t" // movq does not affect flags; -8 to
|
|
|
5015 |
"jb up_lpA \n\t" // offset add ebx
|
|
|
5016 |
"cmpl $0, %%edx \n\t" // test for bytes over mult of 8
|
|
|
5017 |
"jz up_end \n\t"
|
|
|
5018 |
|
|
|
5019 |
"up_lt8: \n\t"
|
|
|
5020 |
"xorl %%eax, %%eax \n\t"
|
|
|
5021 |
"addl %%edx, %%ecx \n\t" // move over byte count into counter
|
|
|
5022 |
|
|
|
5023 |
"up_lp2: \n\t" // use x86 regs for remaining bytes
|
|
|
5024 |
"movb (%%edi,%%ebx,), %%al \n\t"
|
|
|
5025 |
"addb (%%esi,%%ebx,), %%al \n\t"
|
|
|
5026 |
"incl %%ebx \n\t"
|
|
|
5027 |
"cmpl %%ecx, %%ebx \n\t"
|
|
|
5028 |
"movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to
|
|
|
5029 |
"jb up_lp2 \n\t" // offset inc ebx
|
|
|
5030 |
|
|
|
5031 |
"up_end: \n\t"
|
|
|
5032 |
"EMMS \n\t" // conversion of filtered row complete
|
|
|
5033 |
#ifdef __PIC__
|
|
|
5034 |
"popl %%ebx \n\t"
|
|
|
5035 |
#endif
|
|
|
5036 |
|
|
|
5037 |
: "=d" (dummy_value_d), // 0 // output regs (dummy)
|
|
|
5038 |
"=S" (dummy_value_S), // 1
|
|
|
5039 |
"=D" (dummy_value_D) // 2
|
|
|
5040 |
|
|
|
5041 |
: "0" (len), // edx // input regs
|
|
|
5042 |
"1" (prev_row), // esi
|
|
|
5043 |
"2" (row) // edi
|
|
|
5044 |
|
|
|
5045 |
: "%eax", "%ecx" // clobber list (no input regs!)
|
|
|
5046 |
#ifndef __PIC__
|
|
|
5047 |
, "%ebx"
|
|
|
5048 |
#endif
|
|
|
5049 |
|
|
|
5050 |
#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|
|
5051 |
, "%mm0", "%mm1", "%mm2", "%mm3"
|
|
|
5052 |
, "%mm4", "%mm5", "%mm6", "%mm7"
|
|
|
5053 |
#endif
|
|
|
5054 |
);
|
|
|
5055 |
|
|
|
5056 |
} // end of png_read_filter_row_mmx_up()
|
|
|
5057 |
|
|
|
5058 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
5059 |
|
|
|
5060 |
|
|
|
5061 |
|
|
|
5062 |
|
|
|
5063 |
/*===========================================================================*/
|
|
|
5064 |
/* */
|
|
|
5065 |
/* P N G _ R E A D _ F I L T E R _ R O W */
|
|
|
5066 |
/* */
|
|
|
5067 |
/*===========================================================================*/
|
|
|
5068 |
|
|
|
5069 |
|
|
|
5070 |
/* Optimized png_read_filter_row routines */
|
|
|
5071 |
|
|
|
5072 |
void /* PRIVATE */
|
|
|
5073 |
png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
|
|
|
5074 |
row, png_bytep prev_row, int filter)
|
|
|
5075 |
{
|
|
|
5076 |
#ifdef PNG_DEBUG
|
|
|
5077 |
char filnm[10];
|
|
|
5078 |
#endif
|
|
|
5079 |
|
|
|
5080 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|
|
5081 |
/* GRR: these are superseded by png_ptr->asm_flags: */
|
|
|
5082 |
#define UseMMX_sub 1 // GRR: converted 20000730
|
|
|
5083 |
#define UseMMX_up 1 // GRR: converted 20000729
|
|
|
5084 |
#define UseMMX_avg 1 // GRR: converted 20000828 (+ 16-bit bugfix 20000916)
|
|
|
5085 |
#define UseMMX_paeth 1 // GRR: converted 20000828
|
|
|
5086 |
|
|
|
5087 |
if (_mmx_supported == 2) {
|
|
|
5088 |
/* this should have happened in png_init_mmx_flags() already */
|
|
|
5089 |
#if !defined(PNG_1_0_X)
|
|
|
5090 |
png_warning(png_ptr, "asm_flags may not have been initialized");
|
|
|
5091 |
#endif
|
|
|
5092 |
png_mmx_support();
|
|
|
5093 |
}
|
|
|
5094 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
5095 |
|
|
|
5096 |
#ifdef PNG_DEBUG
|
|
|
5097 |
png_debug(1, "in png_read_filter_row (pnggccrd.c)\n");
|
|
|
5098 |
switch (filter)
|
|
|
5099 |
{
|
|
|
5100 |
case 0: sprintf(filnm, "none");
|
|
|
5101 |
break;
|
|
|
5102 |
case 1: sprintf(filnm, "sub-%s",
|
|
|
5103 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
5104 |
#if !defined(PNG_1_0_X)
|
|
|
5105 |
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" :
|
|
|
5106 |
#endif
|
|
|
5107 |
#endif
|
|
|
5108 |
"x86");
|
|
|
5109 |
break;
|
|
|
5110 |
case 2: sprintf(filnm, "up-%s",
|
|
|
5111 |
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
|
|
5112 |
#if !defined(PNG_1_0_X)
|
|
|
5113 |
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" :
|
|
|
5114 |
#endif
|
|
|
5115 |
#endif
|
|
|
5116 |
"x86");
|
|
|
5117 |
break;
|
|
|
5118 |
case 3: sprintf(filnm, "avg-%s",
|
|
|
5119 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
5120 |
#if !defined(PNG_1_0_X)
|
|
|
5121 |
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" :
|
|
|
5122 |
#endif
|
|
|
5123 |
#endif
|
|
|
5124 |
"x86");
|
|
|
5125 |
break;
|
|
|
5126 |
case 4: sprintf(filnm, "Paeth-%s",
|
|
|
5127 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
5128 |
#if !defined(PNG_1_0_X)
|
|
|
5129 |
(png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":
|
|
|
5130 |
#endif
|
|
|
5131 |
#endif
|
|
|
5132 |
"x86");
|
|
|
5133 |
break;
|
|
|
5134 |
default: sprintf(filnm, "unknw");
|
|
|
5135 |
break;
|
|
|
5136 |
}
|
|
|
5137 |
png_debug2(0, "row_number=%5ld, %5s, ", png_ptr->row_number, filnm);
|
|
|
5138 |
png_debug1(0, "row=0x%08lx, ", (unsigned long)row);
|
|
|
5139 |
png_debug2(0, "pixdepth=%2d, bytes=%d, ", (int)row_info->pixel_depth,
|
|
|
5140 |
(int)((row_info->pixel_depth + 7) >> 3));
|
|
|
5141 |
png_debug1(0,"rowbytes=%8ld\n", row_info->rowbytes);
|
|
|
5142 |
#endif /* PNG_DEBUG */
|
|
|
5143 |
|
|
|
5144 |
switch (filter)
|
|
|
5145 |
{
|
|
|
5146 |
case PNG_FILTER_VALUE_NONE:
|
|
|
5147 |
break;
|
|
|
5148 |
|
|
|
5149 |
case PNG_FILTER_VALUE_SUB:
|
|
|
5150 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
5151 |
#if !defined(PNG_1_0_X)
|
|
|
5152 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
|
|
|
5153 |
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|
|
5154 |
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|
|
5155 |
#else
|
|
|
5156 |
if (_mmx_supported)
|
|
|
5157 |
#endif
|
|
|
5158 |
{
|
|
|
5159 |
png_read_filter_row_mmx_sub(row_info, row);
|
|
|
5160 |
}
|
|
|
5161 |
else
|
|
|
5162 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
5163 |
{
|
|
|
5164 |
png_uint_32 i;
|
|
|
5165 |
png_uint_32 istop = row_info->rowbytes;
|
|
|
5166 |
png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
|
|
|
5167 |
png_bytep rp = row + bpp;
|
|
|
5168 |
png_bytep lp = row;
|
|
|
5169 |
|
|
|
5170 |
for (i = bpp; i < istop; i++)
|
|
|
5171 |
{
|
|
|
5172 |
*rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
|
|
|
5173 |
rp++;
|
|
|
5174 |
}
|
|
|
5175 |
} /* end !UseMMX_sub */
|
|
|
5176 |
break;
|
|
|
5177 |
|
|
|
5178 |
case PNG_FILTER_VALUE_UP:
|
|
|
5179 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|
|
5180 |
#if !defined(PNG_1_0_X)
|
|
|
5181 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) &&
|
|
|
5182 |
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|
|
5183 |
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|
|
5184 |
#else
|
|
|
5185 |
if (_mmx_supported)
|
|
|
5186 |
#endif
|
|
|
5187 |
{
|
|
|
5188 |
png_read_filter_row_mmx_up(row_info, row, prev_row);
|
|
|
5189 |
}
|
|
|
5190 |
else
|
|
|
5191 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
5192 |
{
|
|
|
5193 |
png_uint_32 i;
|
|
|
5194 |
png_uint_32 istop = row_info->rowbytes;
|
|
|
5195 |
png_bytep rp = row;
|
|
|
5196 |
png_bytep pp = prev_row;
|
|
|
5197 |
|
|
|
5198 |
for (i = 0; i < istop; ++i)
|
|
|
5199 |
{
|
|
|
5200 |
*rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
|
|
|
5201 |
rp++;
|
|
|
5202 |
}
|
|
|
5203 |
} /* end !UseMMX_up */
|
|
|
5204 |
break;
|
|
|
5205 |
|
|
|
5206 |
case PNG_FILTER_VALUE_AVG:
|
|
|
5207 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
5208 |
#if !defined(PNG_1_0_X)
|
|
|
5209 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
|
|
|
5210 |
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|
|
5211 |
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|
|
5212 |
#else
|
|
|
5213 |
if (_mmx_supported)
|
|
|
5214 |
#endif
|
|
|
5215 |
{
|
|
|
5216 |
png_read_filter_row_mmx_avg(row_info, row, prev_row);
|
|
|
5217 |
}
|
|
|
5218 |
else
|
|
|
5219 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
5220 |
{
|
|
|
5221 |
png_uint_32 i;
|
|
|
5222 |
png_bytep rp = row;
|
|
|
5223 |
png_bytep pp = prev_row;
|
|
|
5224 |
png_bytep lp = row;
|
|
|
5225 |
png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
|
|
|
5226 |
png_uint_32 istop = row_info->rowbytes - bpp;
|
|
|
5227 |
|
|
|
5228 |
for (i = 0; i < bpp; i++)
|
|
|
5229 |
{
|
|
|
5230 |
*rp = (png_byte)(((int)(*rp) +
|
|
|
5231 |
((int)(*pp++) >> 1)) & 0xff);
|
|
|
5232 |
rp++;
|
|
|
5233 |
}
|
|
|
5234 |
|
|
|
5235 |
for (i = 0; i < istop; i++)
|
|
|
5236 |
{
|
|
|
5237 |
*rp = (png_byte)(((int)(*rp) +
|
|
|
5238 |
((int)(*pp++ + *lp++) >> 1)) & 0xff);
|
|
|
5239 |
rp++;
|
|
|
5240 |
}
|
|
|
5241 |
} /* end !UseMMX_avg */
|
|
|
5242 |
break;
|
|
|
5243 |
|
|
|
5244 |
case PNG_FILTER_VALUE_PAETH:
|
|
|
5245 |
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|
|
5246 |
#if !defined(PNG_1_0_X)
|
|
|
5247 |
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
|
|
|
5248 |
(row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|
|
5249 |
(row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|
|
5250 |
#else
|
|
|
5251 |
if (_mmx_supported)
|
|
|
5252 |
#endif
|
|
|
5253 |
{
|
|
|
5254 |
png_read_filter_row_mmx_paeth(row_info, row, prev_row);
|
|
|
5255 |
}
|
|
|
5256 |
else
|
|
|
5257 |
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|
|
5258 |
{
|
|
|
5259 |
png_uint_32 i;
|
|
|
5260 |
png_bytep rp = row;
|
|
|
5261 |
png_bytep pp = prev_row;
|
|
|
5262 |
png_bytep lp = row;
|
|
|
5263 |
png_bytep cp = prev_row;
|
|
|
5264 |
png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
|
|
|
5265 |
png_uint_32 istop = row_info->rowbytes - bpp;
|
|
|
5266 |
|
|
|
5267 |
for (i = 0; i < bpp; i++)
|
|
|
5268 |
{
|
|
|
5269 |
*rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
|
|
|
5270 |
rp++;
|
|
|
5271 |
}
|
|
|
5272 |
|
|
|
5273 |
for (i = 0; i < istop; i++) /* use leftover rp,pp */
|
|
|
5274 |
{
|
|
|
5275 |
int a, b, c, pa, pb, pc, p;
|
|
|
5276 |
|
|
|
5277 |
a = *lp++;
|
|
|
5278 |
b = *pp++;
|
|
|
5279 |
c = *cp++;
|
|
|
5280 |
|
|
|
5281 |
p = b - c;
|
|
|
5282 |
pc = a - c;
|
|
|
5283 |
|
|
|
5284 |
#ifdef PNG_USE_ABS
|
|
|
5285 |
pa = abs(p);
|
|
|
5286 |
pb = abs(pc);
|
|
|
5287 |
pc = abs(p + pc);
|
|
|
5288 |
#else
|
|
|
5289 |
pa = p < 0 ? -p : p;
|
|
|
5290 |
pb = pc < 0 ? -pc : pc;
|
|
|
5291 |
pc = (p + pc) < 0 ? -(p + pc) : p + pc;
|
|
|
5292 |
#endif
|
|
|
5293 |
|
|
|
5294 |
/*
|
|
|
5295 |
if (pa <= pb && pa <= pc)
|
|
|
5296 |
p = a;
|
|
|
5297 |
else if (pb <= pc)
|
|
|
5298 |
p = b;
|
|
|
5299 |
else
|
|
|
5300 |
p = c;
|
|
|
5301 |
*/
|
|
|
5302 |
|
|
|
5303 |
p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
|
|
|
5304 |
|
|
|
5305 |
*rp = (png_byte)(((int)(*rp) + p) & 0xff);
|
|
|
5306 |
rp++;
|
|
|
5307 |
}
|
|
|
5308 |
} /* end !UseMMX_paeth */
|
|
|
5309 |
break;
|
|
|
5310 |
|
|
|
5311 |
default:
|
|
|
5312 |
png_warning(png_ptr, "Ignoring bad row-filter type");
|
|
|
5313 |
*row=0;
|
|
|
5314 |
break;
|
|
|
5315 |
}
|
|
|
5316 |
}
|
|
|
5317 |
|
|
|
5318 |
#endif /* PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
|
|
|
5319 |
|
|
|
5320 |
|
|
|
5321 |
/*===========================================================================*/
|
|
|
5322 |
/* */
|
|
|
5323 |
/* P N G _ M M X _ S U P P O R T */
|
|
|
5324 |
/* */
|
|
|
5325 |
/*===========================================================================*/
|
|
|
5326 |
|
|
|
5327 |
/* GRR NOTES: (1) the following code assumes 386 or better (pushfl/popfl)
|
|
|
5328 |
* (2) all instructions compile with gcc 2.7.2.3 and later
|
|
|
5329 |
* (3) the function is moved down here to prevent gcc from
|
|
|
5330 |
* inlining it in multiple places and then barfing be-
|
|
|
5331 |
* cause the ".NOT_SUPPORTED" label is multiply defined
|
|
|
5332 |
* [is there a way to signal that a *single* function should
|
|
|
5333 |
* not be inlined? is there a way to modify the label for
|
|
|
5334 |
* each inlined instance, e.g., by appending _1, _2, etc.?
|
|
|
5335 |
* maybe if don't use leading "." in label name? (nope...sigh)]
|
|
|
5336 |
*/
|
|
|
5337 |
|
|
|
5338 |
int PNGAPI
|
|
|
5339 |
png_mmx_support(void)
|
|
|
5340 |
{
|
|
|
5341 |
#if defined(PNG_MMX_CODE_SUPPORTED)
|
|
|
5342 |
__asm__ __volatile__ (
|
|
|
5343 |
"pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction
|
|
|
5344 |
"pushl %%ecx \n\t" // so does ecx...
|
|
|
5345 |
"pushl %%edx \n\t" // ...and edx (but ecx & edx safe on Linux)
|
|
|
5346 |
// ".byte 0x66 \n\t" // convert 16-bit pushf to 32-bit pushfd
|
|
|
5347 |
// "pushf \n\t" // 16-bit pushf
|
|
|
5348 |
"pushfl \n\t" // save Eflag to stack
|
|
|
5349 |
"popl %%eax \n\t" // get Eflag from stack into eax
|
|
|
5350 |
"movl %%eax, %%ecx \n\t" // make another copy of Eflag in ecx
|
|
|
5351 |
"xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21)
|
|
|
5352 |
"pushl %%eax \n\t" // save modified Eflag back to stack
|
|
|
5353 |
// ".byte 0x66 \n\t" // convert 16-bit popf to 32-bit popfd
|
|
|
5354 |
// "popf \n\t" // 16-bit popf
|
|
|
5355 |
"popfl \n\t" // restore modified value to Eflag reg
|
|
|
5356 |
"pushfl \n\t" // save Eflag to stack
|
|
|
5357 |
"popl %%eax \n\t" // get Eflag from stack
|
|
|
5358 |
"pushl %%ecx \n\t" // save original Eflag to stack
|
|
|
5359 |
"popfl \n\t" // restore original Eflag
|
|
|
5360 |
"xorl %%ecx, %%eax \n\t" // compare new Eflag with original Eflag
|
|
|
5361 |
"jz 0f \n\t" // if same, CPUID instr. is not supported
|
|
|
5362 |
|
|
|
5363 |
"xorl %%eax, %%eax \n\t" // set eax to zero
|
|
|
5364 |
// ".byte 0x0f, 0xa2 \n\t" // CPUID instruction (two-byte opcode)
|
|
|
5365 |
"cpuid \n\t" // get the CPU identification info
|
|
|
5366 |
"cmpl $1, %%eax \n\t" // make sure eax return non-zero value
|
|
|
5367 |
"jl 0f \n\t" // if eax is zero, MMX is not supported
|
|
|
5368 |
|
|
|
5369 |
"xorl %%eax, %%eax \n\t" // set eax to zero and...
|
|
|
5370 |
"incl %%eax \n\t" // ...increment eax to 1. This pair is
|
|
|
5371 |
// faster than the instruction "mov eax, 1"
|
|
|
5372 |
"cpuid \n\t" // get the CPU identification info again
|
|
|
5373 |
"andl $0x800000, %%edx \n\t" // mask out all bits but MMX bit (23)
|
|
|
5374 |
"cmpl $0, %%edx \n\t" // 0 = MMX not supported
|
|
|
5375 |
"jz 0f \n\t" // non-zero = yes, MMX IS supported
|
|
|
5376 |
|
|
|
5377 |
"movl $1, %%eax \n\t" // set return value to 1
|
|
|
5378 |
"jmp 1f \n\t" // DONE: have MMX support
|
|
|
5379 |
|
|
|
5380 |
"0: \n\t" // .NOT_SUPPORTED: target label for jump instructions
|
|
|
5381 |
"movl $0, %%eax \n\t" // set return value to 0
|
|
|
5382 |
"1: \n\t" // .RETURN: target label for jump instructions
|
|
|
5383 |
"movl %%eax, _mmx_supported \n\t" // save in global static variable, too
|
|
|
5384 |
"popl %%edx \n\t" // restore edx
|
|
|
5385 |
"popl %%ecx \n\t" // restore ecx
|
|
|
5386 |
"popl %%ebx \n\t" // restore ebx
|
|
|
5387 |
|
|
|
5388 |
// "ret \n\t" // DONE: no MMX support
|
|
|
5389 |
// (fall through to standard C "ret")
|
|
|
5390 |
|
|
|
5391 |
: // output list (none)
|
|
|
5392 |
|
|
|
5393 |
: // any variables used on input (none)
|
|
|
5394 |
|
|
|
5395 |
: "%eax" // clobber list
|
|
|
5396 |
// , "%ebx", "%ecx", "%edx" // GRR: we handle these manually
|
|
|
5397 |
// , "memory" // if write to a variable gcc thought was in a reg
|
|
|
5398 |
// , "cc" // "condition codes" (flag bits)
|
|
|
5399 |
);
|
|
|
5400 |
#else
|
|
|
5401 |
_mmx_supported = 0;
|
|
|
5402 |
#endif /* PNG_MMX_CODE_SUPPORTED */
|
|
|
5403 |
|
|
|
5404 |
return _mmx_supported;
|
|
|
5405 |
}
|
|
|
5406 |
|
|
|
5407 |
|
|
|
5408 |
#endif /* PNG_USE_PNGGCCRD */
|