Subversion Repositories planix.SVN

        TEXT    _sha1block+0(SB),$352

/* x = (wp[off-f] ^ wp[off-8] ^ wp[off-14] ^ wp[off-16]) <<< 1;
 * wp[off] = x;
 * x += A <<< 5;
 * E += 0xca62c1d6 + x;
 * x = FN(B,C,D);
 * E += x;
 * B >>> 2
 */
#define BSWAPDI BYTE $0x0f; BYTE $0xcf;

#define BODY(off,FN,V,A,B,C,D,E)\
        MOVL (off-64)(BP),DI;\
        XORL (off-56)(BP),DI;\
        XORL (off-32)(BP),DI;\
        XORL (off-12)(BP),DI;\
        ROLL $1,DI;\
        MOVL DI,off(BP);\
        LEAL V(DI)(E*1),E;\
        MOVL A,DI;\
        ROLL $5,DI;\
        ADDL DI,E;\
        FN(B,C,D)\
        ADDL DI,E;\
        RORL $2,B;\

#define BODY0(off,FN,V,A,B,C,D,E)\
        MOVL off(BX),DI;\
        BSWAPDI;\
        MOVL DI,off(BP);\
        LEAL V(DI)(E*1),E;\
        MOVL A,DI;\
        ROLL $5,DI;\
        ADDL DI,E;\
        FN(B,C,D)\
        ADDL DI,E;\
        RORL $2,B;\

/*
 * fn1 = (((C^D)&B)^D);
 */
#define FN1(B,C,D)\
        MOVL C,DI;\
        XORL D,DI;\
        ANDL B,DI;\
        XORL D,DI;\

/*
 * fn24 = B ^ C ^ D
 */
#define FN24(B,C,D)\
        MOVL B,DI;\
        XORL C,DI;\
        XORL D,DI;\

/*
 * fn3 = ((B ^ C) & (D ^= B)) ^ B
 * D ^= B to restore D
 */
#define FN3(B,C,D)\
        MOVL B,DI;\
        XORL C,DI;\
        XORL B,D;\
        ANDL D,DI;\
        XORL B,DI;\
        XORL B,D;\

/*
 * stack offsets
 * void sha1block(uchar *DATA, int LEN, ulong *STATE)
 */
#define DATA    0
#define LEN     4
#define STATE   8

/*
 * stack offsets for locals
 * ulong w[80];
 * uchar *edata;
 * ulong *w15, *w40, *w60, *w80;
 * register local
 * ulong *wp = BP
 * ulong a = eax, b = ebx, c = ecx, d = edx, e = esi
 * ulong tmp = edi
 */
#define WARRAY  (-4-(80*4))
#define TMP1    (-8-(80*4))
#define TMP2    (-12-(80*4))
#define W15     (-16-(80*4))
#define W40     (-20-(80*4))
#define W60     (-24-(80*4))
#define W80     (-28-(80*4))
#define EDATA   (-32-(80*4))

        MOVL data+DATA(FP),AX
        ADDL len+LEN(FP),AX
        MOVL AX,edata+EDATA(SP)

        LEAL aw15+(WARRAY+15*4)(SP),DI
        MOVL DI,w15+W15(SP)
        LEAL aw40+(WARRAY+40*4)(SP),DX
        MOVL DX,w40+W40(SP)
        LEAL aw60+(WARRAY+60*4)(SP),CX
        MOVL CX,w60+W60(SP)
        LEAL aw80+(WARRAY+80*4)(SP),DI
        MOVL DI,w80+W80(SP)

mainloop:
        LEAL warray+WARRAY(SP),BP

        MOVL state+STATE(FP),DI
        MOVL (DI),AX
        MOVL 4(DI),BX
        MOVL BX,tmp1+TMP1(SP)
        MOVL 8(DI),CX
        MOVL 12(DI),DX
        MOVL 16(DI),SI

        MOVL data+DATA(FP),BX

loop1:
        BODY0(0,FN1,0x5a827999,AX,tmp1+TMP1(SP),CX,DX,SI)
        MOVL SI,tmp2+TMP2(SP)
        BODY0(4,FN1,0x5a827999,SI,AX,tmp1+TMP1(SP),CX,DX)
        MOVL tmp1+TMP1(SP),SI
        BODY0(8,FN1,0x5a827999,DX,tmp2+TMP2(SP),AX,SI,CX)
        BODY0(12,FN1,0x5a827999,CX,DX,tmp2+TMP2(SP),AX,SI)
        MOVL SI,tmp1+TMP1(SP)
        BODY0(16,FN1,0x5a827999,SI,CX,DX,tmp2+TMP2(SP),AX)
        MOVL tmp2+TMP2(SP),SI

        ADDL $20,BX
        ADDL $20,BP
        CMPL BP,w15+W15(SP)
        JCS loop1

        BODY0(0,FN1,0x5a827999,AX,tmp1+TMP1(SP),CX,DX,SI)
        ADDL $4,BX
        MOVL BX,data+DATA(FP)
        MOVL tmp1+TMP1(SP),BX

        BODY(4,FN1,0x5a827999,SI,AX,BX,CX,DX)
        BODY(8,FN1,0x5a827999,DX,SI,AX,BX,CX)
        BODY(12,FN1,0x5a827999,CX,DX,SI,AX,BX)
        BODY(16,FN1,0x5a827999,BX,CX,DX,SI,AX)

        ADDL $20,BP

loop2:
        BODY(0,FN24,0x6ed9eba1,AX,BX,CX,DX,SI)
        BODY(4,FN24,0x6ed9eba1,SI,AX,BX,CX,DX)
        BODY(8,FN24,0x6ed9eba1,DX,SI,AX,BX,CX)
        BODY(12,FN24,0x6ed9eba1,CX,DX,SI,AX,BX)
        BODY(16,FN24,0x6ed9eba1,BX,CX,DX,SI,AX)

        ADDL $20,BP
        CMPL BP,w40+W40(SP)
        JCS loop2

loop3:
        BODY(0,FN3,0x8f1bbcdc,AX,BX,CX,DX,SI)
        BODY(4,FN3,0x8f1bbcdc,SI,AX,BX,CX,DX)
        BODY(8,FN3,0x8f1bbcdc,DX,SI,AX,BX,CX)
        BODY(12,FN3,0x8f1bbcdc,CX,DX,SI,AX,BX)
        BODY(16,FN3,0x8f1bbcdc,BX,CX,DX,SI,AX)

        ADDL $20,BP
        CMPL BP,w60+W60(SP)
        JCS loop3

loop4:
        BODY(0,FN24,0xca62c1d6,AX,BX,CX,DX,SI)
        BODY(4,FN24,0xca62c1d6,SI,AX,BX,CX,DX)
        BODY(8,FN24,0xca62c1d6,DX,SI,AX,BX,CX)
        BODY(12,FN24,0xca62c1d6,CX,DX,SI,AX,BX)
        BODY(16,FN24,0xca62c1d6,BX,CX,DX,SI,AX)

        ADDL $20,BP
        CMPL BP,w80+W80(SP)
        JCS loop4

        MOVL state+STATE(FP),DI
        ADDL AX,0(DI)
        ADDL BX,4(DI)
        ADDL CX,8(DI)
        ADDL DX,12(DI)
        ADDL SI,16(DI)

        MOVL edata+EDATA(SP),DI
        CMPL data+DATA(FP),DI
        JCS mainloop

        RET
        END