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47489f2376
* checks if there are differences between the expectloc and
location.loc from secondpass in EXTDEBUG
137 lines
4.5 KiB
ObjectPascal
137 lines
4.5 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate i386 assembler for constants
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit n386con;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncon,ncgcon;
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type
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ti386realconstnode = class(tcgrealconstnode)
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function pass_1 : tnode;override;
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procedure pass_2;override;
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end;
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implementation
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uses
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systems,globtype,
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cpubase,
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cga,cginfo,cgbase,rgobj,rgcpu;
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{*****************************************************************************
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TI386REALCONSTNODE
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*****************************************************************************}
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function ti386realconstnode.pass_1 : tnode;
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begin
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result:=nil;
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if (value_real=1.0) or (value_real=0.0) then
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begin
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expectloc:=LOC_FPUREGISTER;
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registersfpu:=1;
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end
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else
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expectloc:=LOC_CREFERENCE;
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end;
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procedure ti386realconstnode.pass_2;
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begin
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if (value_real=1.0) then
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begin
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emit_none(A_FLD1,S_NO);
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
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location.register.enum:=R_ST;
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inc(trgcpu(rg).fpuvaroffset);
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end
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else if (value_real=0.0) then
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begin
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emit_none(A_FLDZ,S_NO);
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location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
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location.register.enum:=R_ST;
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inc(trgcpu(rg).fpuvaroffset);
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end
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else
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inherited pass_2;
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end;
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begin
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crealconstnode:=ti386realconstnode;
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end.
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{
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$Log$
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Revision 1.19 2003-04-22 23:50:23 peter
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* firstpass uses expectloc
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* checks if there are differences between the expectloc and
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location.loc from secondpass in EXTDEBUG
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Revision 1.18 2003/04/22 09:54:18 peter
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* use location_reset
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Revision 1.17 2003/01/08 18:43:57 daniel
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* Tregister changed into a record
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Revision 1.16 2002/05/18 13:34:25 peter
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* readded missing revisions
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Revision 1.15 2002/05/16 19:46:51 carl
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+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
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+ try to fix temp allocation (still in ifdef)
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+ generic constructor calls
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+ start of tassembler / tmodulebase class cleanup
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Revision 1.13 2002/04/02 17:11:36 peter
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* tlocation,treference update
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* LOC_CONSTANT added for better constant handling
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* secondadd splitted in multiple routines
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* location_force_reg added for loading a location to a register
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of a specified size
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* secondassignment parses now first the right and then the left node
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(this is compatible with Kylix). This saves a lot of push/pop especially
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with string operations
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* adapted some routines to use the new cg methods
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Revision 1.12 2002/03/31 20:26:38 jonas
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+ a_loadfpu_* and a_loadmm_* methods in tcg
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* register allocation is now handled by a class and is mostly processor
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independent (+rgobj.pas and i386/rgcpu.pas)
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* temp allocation is now handled by a class (+tgobj.pas, -i386\tgcpu.pas)
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* some small improvements and fixes to the optimizer
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* some register allocation fixes
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* some fpuvaroffset fixes in the unary minus node
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* push/popusedregisters is now called rg.save/restoreusedregisters and
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(for i386) uses temps instead of push/pop's when using -Op3 (that code is
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also better optimizable)
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* fixed and optimized register saving/restoring for new/dispose nodes
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* LOC_FPU locations now also require their "register" field to be set to
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R_ST, not R_ST0 (the latter is used for LOC_CFPUREGISTER locations only)
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- list field removed of the tnode class because it's not used currently
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and can cause hard-to-find bugs
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}
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