mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-22 00:49:30 +02:00
91 lines
2.8 KiB
ObjectPascal
91 lines
2.8 KiB
ObjectPascal
{
|
|
Copyright (c) 1998-2012 by Florian Klaempfl and others
|
|
|
|
Generate i386 assembler for constants
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
****************************************************************************
|
|
}
|
|
unit nx86con;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
uses
|
|
node,ncon,ncgcon;
|
|
|
|
type
|
|
tx86realconstnode = class(tcgrealconstnode)
|
|
function pass_1 : tnode;override;
|
|
procedure pass_generate_code;override;
|
|
end;
|
|
|
|
implementation
|
|
|
|
uses
|
|
systems,globals,
|
|
symdef,
|
|
defutil,
|
|
cpubase,
|
|
cga,cgx86,cgobj,cgbase,cgutils;
|
|
|
|
{*****************************************************************************
|
|
TX86REALCONSTNODE
|
|
*****************************************************************************}
|
|
|
|
function tx86realconstnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
if is_number_float(value_real) and not(use_vectorfpu(resultdef)) and ((value_real=1.0) or (value_real=0.0)) then
|
|
expectloc:=LOC_FPUREGISTER
|
|
else
|
|
expectloc:=LOC_CREFERENCE;
|
|
end;
|
|
|
|
procedure tx86realconstnode.pass_generate_code;
|
|
|
|
begin
|
|
if is_number_float(value_real) then
|
|
begin
|
|
if (value_real=1.0) and not(use_vectorfpu(resultdef)) then
|
|
begin
|
|
emit_none(A_FLD1,S_NO);
|
|
location_reset(location,LOC_FPUREGISTER,def_cgsize(resultdef));
|
|
location.register:=NR_ST;
|
|
tcgx86(cg).inc_fpu_stack;
|
|
end
|
|
else if (value_real=0.0) and not(use_vectorfpu(resultdef)) then
|
|
begin
|
|
emit_none(A_FLDZ,S_NO);
|
|
if (get_real_sign(value_real) < 0) then
|
|
emit_none(A_FCHS,S_NO);
|
|
location_reset(location,LOC_FPUREGISTER,def_cgsize(resultdef));
|
|
location.register:=NR_ST;
|
|
tcgx86(cg).inc_fpu_stack;
|
|
end
|
|
else
|
|
inherited pass_generate_code;
|
|
end
|
|
else
|
|
inherited pass_generate_code;
|
|
end;
|
|
|
|
|
|
begin
|
|
crealconstnode:=tx86realconstnode;
|
|
end.
|