PATCH: 32bit memcmp/strcmp/strncmp optimized for SSSE3/SSS4.2

[H.J. Lu]

On Mon, Feb 15, 2010 at 1:07 PM, Ulrich Drepper <drepper@redhat.com> wrote:
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> On 02/12/2010 04:01 PM, H.J. Lu wrote:
>> Here is a patch to provide 32bit memcmp/strcmp/strncmp optimized for
>> SSSE3/SSS4.2.  It can improve memcmp by up to 3X, strcmp by up
>> to 7X, strncmp by up to 5X.
>
> I added the code but had to fix a lot of bugs in it.  Take a look at the
> changes.  You didn't handle unwind info correctly.

I will update my version and verify unwind info. Then I will
compare it against glibc.

> Another bug: at the end of strcmp-sse4.S you had a conditional jump
> without anything following it.  From what I can see the last test isn't
> necessary.  Please confirm.
>

That is correct.

Thanks.


-- 
H.J.