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clear destination register before doing CVTS* to break dependency chains

db4
Joe Groff 2009-11-01 18:29:12 -06:00
parent fa8ec06ab5
commit 36e4a141c4
1 changed files with 6 additions and 3 deletions
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basis/cpu/x86/x86.factor
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@ -489,10 +489,13 @@ M: x86 %min-float double-rep two-operand MINSD ;
M: x86 %max-float double-rep two-operand MAXSD ;
M: x86 %sqrt SQRTSD ;
M: x86 %single>double-float CVTSS2SD ;
M: x86 %double>single-float CVTSD2SS ;
: %clear-unless-in-place ( dst src -- )
over = [ drop ] [ dup XORPS ] if ;
M: x86 %integer>float CVTSI2SD ;
M: x86 %single>double-float [ %clear-unless-in-place ] [ CVTSS2SD ] 2bi ;
M: x86 %double>single-float [ %clear-unless-in-place ] [ CVTSD2SS ] 2bi ;
M: x86 %integer>float [ dup XORPS ] [ CVTSI2SD ] 2bi ;
M: x86 %float>integer CVTTSD2SI ;
: %cmov-float= ( dst src -- )