Opcode COMISS


CPU: Pentium III+ (KNI/MMX2)
Type of instruction: User

Instruction: COMISS dest,src

Description:
OF <- 0;
SF <- 0;
AF <- 0;
if (dest[<0>] UNORD src[<0>]) then
ZF <- 1;
PF <- 1;
CF <- 1;
elif (dest[<0>] > src[<0>]) then
ZF <- 0;
PF <- 0;
CF <- 0;
elif (dest[<0>] < src[<0>]) then
ZF <- 0;
PF <- 0;
CF <- 1;
else
ZF <- 1;
PF <- 0;
CF <- 0;
endif
<0> is 31..0

Physical Form and Timing:
COMISS xmm1,xmm2/m32 ---- 0F 2F /r ---- ?


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