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* try to break dependency chains when generating vsqrt instructions

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git-svn-id: trunk@36282 -
This commit is contained in:
florian 2017-05-21 11:35:33 +00:00
parent 8eec29b139
commit 12dec14859
1 changed files with 5 additions and 2 deletions
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7
compiler/x86/nx86inl.pas
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@ -543,9 +543,12 @@ implementation
case tfloatdef(resultdef).floattype of
s32real:
{ we use S_NO instead of S_XMM here, regardless of the register size, as the size of the memory location is 32/64 bit }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_VSQRTSS,S_NO,left.location.register,location.register,location.register));
{ using left.location.register here as 2nd parameter is crucial to break dependency chains }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_VSQRTSS,S_NO,left.location.register,left.location.register,location.register));
s64real:
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_VSQRTSD,S_NO,left.location.register,location.register,location.register));
{ we use S_NO instead of S_XMM here, regardless of the register size, as the size of the memory location is 32/64 bit }
{ using left.location.register here as 2nd parameter is crucial to break dependency chains }
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg_reg(A_VSQRTSD,S_NO,left.location.register,left.location.register,location.register));
else
internalerror(200510031);
end