PATCH: 64bit SSE4 optimized memcmp

Ulrich Drepper drepper@redhat.com
Tue Apr 13 14:04:00 GMT 2010


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On 04/12/2010 03:40 PM, H.J. Lu wrote:
> This is 64bit SSE4 optimized memcmp. It improves memcmp by upto 3X
> on Intel Core i7.

I don't see any SSE4.2 instructions being used.  ptest is an SSE4.1
instruction.

Also, your Makefile change contains references to a whole set of other
files which haven't yet been submitted and therefore the patch doesn't
apply.

- -- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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