Opcode UCOMISS
CPU: Pentium III+ (KNI/MMX2)
Type of instruction: User
Instruction: UCOMISS dest,src
Description:
OF <- 0;
SF <- 0;
AF <- 0;
if (dest[31..0] UNORD src[31..0]) then
ZF <- 1;
PF <- 1;
CF <- 1;
else if (dest[31..0] > src[31..0]) then
ZF <- 0;
PF <- 0;
CF <- 0;
else if (dest[31..0] < src[31..0]) then
ZF <- 0;
PF <- 0;
CF <- 1;
else // Equal
ZF <- 1;
PF <- 0;
CF <- 0;
endif
Physical Form and Timing:
UCOMISS xmm1,xmm2/m32 ---- 0F 2E /r ---- ?
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