paweld/fpc
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/fpc/source.git synced 2025-08-28 09:10:25 +02:00
Code Issues Packages Projects Releases Wiki Activity

+ use pxor/vpxor to load 0.0

Browse Source 
git-svn-id: trunk@47053 -
This commit is contained in:
florian 2020-10-05 20:11:41 +00:00
parent a8bc2f6947
commit 36d21d2d81
1 changed files with 20 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
compiler/x86/nx86con.pas
View File

@ -41,6 +41,7 @@ implementation
symdef,
defutil,
cpubase,
aasmdata,
cga,cgx86,cgobj,cgbase,cgutils;
{*****************************************************************************
@ -68,14 +69,26 @@ implementation
location.register:=NR_ST;
tcgx86(cg).inc_fpu_stack;
end
else if (value_real=0.0) and not(use_vectorfpu(resultdef)) then
else if value_real=0.0 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;
if use_vectorfpu(resultdef) then
begin
location_reset(location,LOC_MMREGISTER,def_cgsize(resultdef));
location.register:=cg.getmmregister(current_asmdata.CurrAsmList,def_cgsize(resultdef));
if UseAVX then
emit_reg_reg_reg(A_VPXOR,S_NO,location.register,location.register,location.register)
else
emit_reg_reg(A_PXOR,S_NO,location.register,location.register);
end
else
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;
end
else
inherited pass_generate_code;