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cpu.x86.x87: use FISTPD to convert floats to integers, instead of the SSE3 instruction FISTTPD

db4
Slava Pestov 2010-05-18 17:10:58 -04:00
parent f5a951801e
commit 0aa6ae0feb
1 changed files with 9 additions and 1 deletions
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10
basis/cpu/x86/x87/x87.factor
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@ -72,7 +72,15 @@ M:: x86 %integer>float ( dst src -- )
M:: x86 %float>integer ( dst src -- ) M:: x86 %float>integer ( dst src -- )
src FLD* src FLD*
4 stack@ FISTTPD 8 stack@ EAX MOV
0 stack@ FNSTCW
AX 0 stack@ MOV
AH 12 <byte> MOV
2 stack@ AX MOV
2 stack@ FLDCW
4 stack@ FISTPD
0 stack@ FLDCW
EAX 8 stack@ MOV
dst 4 stack@ MOV ; dst 4 stack@ MOV ;
: compare-op ( src1 src2 quot -- ) : compare-op ( src1 src2 quot -- )