PROWAREtech
x86 Assembly: How to Check for SSE4.2 Support
An example of how to check if a processor supports the SSE4.2 instruction set.
This assembly code was compiled with MS Visual C++ Express Edition 2005 using the MACRO ASSEMBLER for MS Visual C++ Express Edition 2005.
This example is from the SSE/SSE2 tutorial.
TITLE 'extern "C" int __cdecl isSSE42();'
.686P
.model FLAT
PUBLIC _isSSE42
_TEXT SEGMENT
_isSSE42 PROC NEAR
push ebx
mov eax, 1
cpuid
shr ecx, 20 ; bit 20 of the ecx register
and ecx, 1
mov eax, ecx
pop ebx
ret 0
_isSSE42 ENDP
_TEXT ENDS
END
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