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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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VERSION INFORMATION
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===================
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--------------------------------------------------------------------------
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$Header: /u/g/release/CVSROOT/Source/src/installers/sparc/common/regable.c,v 1.1.1.1 1998/01/17 15:55:55 release Exp $
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--------------------------------------------------------------------------
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$Log: regable.c,v $
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* Revision 1.1.1.1 1998/01/17 15:55:55 release
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* First version to be checked into rolling release.
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*
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* Revision 1.6 1996/09/06 16:50:35 pwe
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* fix outpar doubles for postlude
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*
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* Revision 1.5 1995/12/15 10:26:39 john
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* Made caller_names non-regable
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*
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* Revision 1.4 1995/09/25 16:35:45 john
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* Fix for outpar
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*
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* Revision 1.3 1995/05/26 13:01:16 john
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* Reformatting
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*
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* Revision 1.2 1995/03/28 12:24:40 john
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* Stopped putting arrays in registers
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*
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* Revision 1.1.1.1 1995/03/13 10:18:53 john
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* Entered into CVS
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*
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* Revision 1.3 1994/12/01 13:36:27 djch
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* Fix fixregable and floatregable to avoid envoffset's
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*
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* Revision 1.2 1994/07/07 16:11:33 djch
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* Jul94 tape
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*
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* Revision 1.1 1994/05/03 14:49:50 djch
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* Initial revision
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*
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* Revision 1.2 93/09/27 14:54:38 14:54:38 ra (Robert Andrews)
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* Long double values should not be put in registers (yet),
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*
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* Revision 1.1 93/06/24 14:59:08 14:59:08 ra (Robert Andrews)
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* Initial revision
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*
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--------------------------------------------------------------------------
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*/
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#define SPARCTRANS_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 "tags.h"
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#include "regable.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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if ( is_floating ( name ( s ) ) ) {
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/* Floating point values don't go in fixed registers */
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return ( 0 ) ;
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}
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else {
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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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/* Reject anything too big */
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return ( 0 ) ;
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}
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else if ( name ( s ) == cpdhd || name (s) == nofhd) {
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/* Compound shapes are not put in registers */
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return ( 0 ) ;
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}
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else if ( /*a.ashsize == a.ashalign && a.ashalign !=*/ 1 ) {
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/* Bitfields are put in registers */
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return ( 1 ) ;
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}
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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 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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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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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 ) return ( 0 ) ;
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#endif
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return ( 1 ) ;
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}
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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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