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x86 Assembly: How to Check for SSE2 Support

An example of how to check if a processor supports the SSE2 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 isSSE2();'
.686P
.model FLAT
PUBLIC	_isSSE2
_TEXT	SEGMENT
_isSSE2 PROC NEAR

	push ebx
	
	mov eax, 1
	cpuid
	shr edx, 26 ; bit 26 of the edx register
	and edx, 1
	mov eax, edx

	pop ebx

	ret 0
_isSSE2 ENDP
_TEXT	ENDS
END

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