On Tue, Aug 02, 2022 at 05:22:52PM +0700, John Naylor wrote:
> Given all this, the anti-climax is: it seems we can start with something
> like src/include/port/simd.h with:
>
> #if (defined(__x86_64__) || defined(_M_AMD64))
> #include <emmintrin.h>
> #define USE_SSE2
> #endif
>
> (plus a comment summarizing the above)
>
> That we can include into other files, and would be the place to put helper
> functions. Thoughts?
+1
I did a bit of cross-checking, and AFAICT this is a reasonable starting
point. emmintrin.h appears to be sufficient for one of my patches that
makes use of SSE2 instructions. That being said, I imagine it'll be
especially important to keep an eye on the buildfarm when this change is
committed.
--
Nathan Bossart
Amazon Web Services: https://aws.amazon.com
