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+ (V)Cvtss2CvtSd(V)Cvtsd2ss2Nop optimization, resolves #39360

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florian 2021-10-06 21:57:24 +02:00
parent d5867793f6
commit ec40db3da7
3 changed files with 39 additions and 0 deletions
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3
compiler/i386/aoptcpu.pas
View File

@ -228,6 +228,9 @@ unit aoptcpu;
A_SHRX,
A_SHLX:
Result:=OptPass1SHXX(p);
A_VCVTSS2SD,
A_CVTSS2SD:
Result:=OptPass1_V_Cvtss2sd(p);
else
;
end;

33
compiler/x86/aoptx86.pas
View File

@ -158,6 +158,7 @@ unit aoptx86;
function OptPass1Imul(var p : tai) : boolean;
function OptPass1Jcc(var p : tai) : boolean;
function OptPass1SHXX(var p: tai): boolean;
function OptPass1_V_Cvtss2sd(var p: tai): boolean;
function OptPass2Movx(var p : tai): Boolean;
function OptPass2MOV(var p : tai) : boolean;
@ -5855,6 +5856,38 @@ unit aoptx86;
end;
function TX86AsmOptimizer.OptPass1_V_Cvtss2sd(var p: tai): boolean;
var
hp1: tai;
begin
Result:=false;
{ get rid of
(v)cvtss2sd reg0,<reg1,>reg2
(v)cvtss2sd reg2,<reg2,>reg0
}
if GetNextInstruction(p,hp1) and
(((taicpu(p).opcode=A_CVTSS2SD) and MatchInstruction(hp1,A_CVTSD2SS,[taicpu(p).opsize]) and
MatchOperand(taicpu(p).oper[0]^,taicpu(hp1).oper[1]^) and MatchOperand(taicpu(p).oper[1]^,taicpu(hp1).oper[0]^)) or
((taicpu(p).opcode=A_VCVTSS2SD) and MatchInstruction(hp1,A_VCVTSD2SS,[taicpu(p).opsize]) and
MatchOpType(taicpu(p),top_reg,top_reg,top_reg) and
MatchOpType(taicpu(hp1),top_reg,top_reg,top_reg) and
(getsupreg(taicpu(p).oper[0]^.reg)=getsupreg(taicpu(p).oper[1]^.reg)) and
(getsupreg(taicpu(hp1).oper[0]^.reg)=getsupreg(taicpu(hp1).oper[1]^.reg)) and
(getsupreg(taicpu(p).oper[0]^.reg)=getsupreg(taicpu(hp1).oper[2]^.reg)) and
(getsupreg(taicpu(p).oper[2]^.reg)=getsupreg(taicpu(hp1).oper[0]^.reg))
)
) then
begin
DebugMsg(SPeepholeOptimization + '(V)Cvtss2CvtSd(V)Cvtsd2ss2Nop done',p);
RemoveCurrentP(p);
RemoveInstruction(hp1);
Result:=true;
Exit;
end;
end;
function TX86AsmOptimizer.OptPass1Jcc(var p : tai) : boolean;
var
hp1, hp2, hp3, hp4, hp5: tai;

3
compiler/x86_64/aoptcpu.pas
View File

@ -152,6 +152,9 @@ uses
A_SHRX,
A_SHLX:
Result:=OptPass1SHXX(p);
A_VCVTSS2SD,
A_CVTSS2SD:
Result:=OptPass1_V_Cvtss2sd(p);
else
;
end;