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Re: SSE and SSE2 intrinsics


On Mon, Feb 04, 2002 at 12:44:20PM -0000, Tom Womack wrote:
> I worked out I should do typedef int __m128i ((attribute V4SI)) to get the
> right type, but I couldn't find in the documentation any indication of what
> I should use in gcc where I'd use _mm_cmpgt_epi8 in VC++; indeed, even
> looking through i386.md I couldn't find an instruction-definition for the
> SSE2 extended-MMX compare instructions.
> 
> I was somehow expecting a file that I could #include to get Intel intrinsics
> recognised, but I couldn't find one even by grepping through the source
> tree.

It's there -- #include <xmmintrin.h> or <mmintrin.h> just like the
Intel compiler.  Oh, I see.  You said you were using the 2001-12-31
snapshot.  These headers were added 2002-01-11.

I have no idea what "_mm_cmpgt_epi8" is though.  It's not in my
documentation.  Is that just a typo for "_mm_cmpgt_pi8"?


r~


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