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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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/*
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$Log: regable.c,v $
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* Revision 1.1.1.1 1998/01/17 15:56:03 release
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* First version to be checked into rolling release.
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*
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* Revision 1.3 1996/03/14 16:18:48 wfs
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* tophed is not valregable + ptr position in apply_general case of scan() + superfluous "set -x" in bl_install script.
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*
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* Revision 1.2 1995/12/18 13:12:25 wfs
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* Put hppatrans uder cvs control. Major Changes made since last release
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* include:
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* (i) PIC code generation.
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* (ii) Profiling.
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* (iii) Dynamic Initialization.
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* (iv) Debugging of Exception Handling and Diagnostics.
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*
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* Revision 5.1 1995/10/05 08:59:34 wfs
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* "isoutpar" check added to "fixregable()" and "floatregable()".
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*
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* Revision 5.0 1995/08/25 13:42:58 wfs
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* Preperation for August 25 Glue release
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*
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* Revision 3.4 1995/08/25 10:25:41 wfs
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* *** empty log message ***
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*
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* Revision 3.4 1995/08/25 10:25:41 wfs
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* *** empty log message ***
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*
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* Revision 3.1 95/04/10 16:27:56 16:27:56 wfs (William Simmonds)
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* Apr95 tape version.
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*
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* Revision 3.0 95/03/30 11:18:47 11:18:47 wfs (William Simmonds)
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* Mar95 tape version with CRCR95_178 bug fix.
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*
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* Revision 2.0 95/03/15 15:28:37 15:28:37 wfs (William Simmonds)
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* spec 3.1 changes implemented, tests outstanding.
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*
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* Revision 1.1 95/01/11 13:15:06 13:15:06 wfs (William Simmonds)
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* Initial revision
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*
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*/
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#define HPPATRANS_CODE
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#include "config.h"
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#include "expmacs.h"
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#include "common_types.h"
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#include "shapemacs.h"
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#include "regable.h"
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#include "tags.h"
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/*
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DOES A VALUE OF SHAPE s FIT INTO A FIXED REGISTER?
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*/
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bool valregable
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PROTO_N ( ( s ) )
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PROTO_T ( shape s )
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{
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int n = name(s);
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if ( is_floating(n) )
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{
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return 0 ; /* floats don't go in fixed point registers */
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}
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else
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{
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ash a ;
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a = ashof(s) ;
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if ( a.ashsize > 32 )
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{
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return (0) ; /* too big for a 32 bit register */
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}
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else if ( n==cpdhd || n==nofhd )
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{
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return 0 ; /* Compound shapes are not put in registers */
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}
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else if ( n==tophd )
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{
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return 0 ;
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}
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else
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{
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return 1 ;
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}
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}
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}
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/*
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DOES THE EXPRESSION e FIT INTO A FIXED REGISTER?
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*/
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bool fixregable
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PROTO_N ( ( e ) )
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PROTO_T ( exp e )
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{
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if ( !isvis ( e ) && !isoutpar( e ) && !isglob ( e ) && !isenvoff(e)
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&& (name(son(e))!=caller_name_tag) ) {
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shape s = sh ( son ( e ) ) ;
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return ( valregable ( s ) ) ;
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}
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return ( 0 ) ;
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}
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/*
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DOES THE EXPRESSION e FIT INTO A FLOATING POINT REGISTER?
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*/
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bool floatregable
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PROTO_N ( ( e ) )
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PROTO_T ( exp e )
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{
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if ( !isvis ( e ) && !isoutpar( e ) && !isglob ( e ) && !isenvoff(e)
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&& (name(son(e))!=caller_name_tag) ) {
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shape s = sh ( son ( e ) ) ;
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if ( is_floating ( name ( s ) ) ) {
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#if use_long_double
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if ( shape_size ( s ) > 64 )
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{
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return ( 0 ) ;
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}
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#endif
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return ( 1 ) ;
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} else {
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return ( 0 ) ;
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}
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}
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return (0) ;
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}
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