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Does memcmp_sse4_2 actually use SSE 4.2 instructions?
- From: Matt Turner <mattst88 at gmail dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: libc-alpha at sourceware dot org
- Date: Tue, 9 Jul 2013 17:04:26 -0700
- Subject: Does memcmp_sse4_2 actually use SSE 4.2 instructions?
Hi,
I can't seem to find any SSE 4.2 instructions in
sysdeps/i386/i686/multiarch/memcmp-sse4.S.
It uses ptest, which is in 4.1 but apparently no 4.2 instructions.
Should I send a patch?
Thanks,
Matt