This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [PATCH, x86] Use vector moves in memmove expanding
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: "Michael V. Zolotukhin" <michael dot v dot zolotukhin at gmail dot com>
- Cc: Eric Botcazou <ebotcazou at adacore dot com>, Kirill Yukhin <kirill dot yukhin at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Jan Hubicka <hubicka at ucw dot cz>, "Ond??ej B?lka" <neleai at seznam dot cz>, Uros Bizjak <ubizjak at gmail dot com>
- Date: Tue, 3 Sep 2013 12:25:08 -0700
- Subject: Re: [PATCH, x86] Use vector moves in memmove expanding
- Authentication-results: sourceware.org; auth=none
- References: <CAMe9rOrRaZANTPLZQxv8j-V5Ozy75M4d80oCC-rZRT0xQ4a=Rw at mail dot gmail dot com> <20130705112534 dot GA10164 at kam dot mff dot cuni dot cz> <CAGs3Rfs86yLj3-1HkAMnkf4ey87cZgiqajLAH=WC9mpg6OJLiw at mail dot gmail dot com> <7703907 dot JSoGtmLQkn at polaris> <20130903190510 dot GA49767 at msticlxl57 dot ims dot intel dot com>
On Tue, Sep 3, 2013 at 12:05 PM, Michael V. Zolotukhin
<michael.v.zolotukhin@gmail.com> wrote:
>> The patch miscompiles the MPFR library on x86 Pentium Pro. Reduced testcase
>> attached, compile for x86 with -mtune=pentiumpro.
> Thanks, I'll look at that in the nearest future.
>
> Best regards, Michael
The problem is
testb $2, %bl
je .L6
It should be cmpb instead of testb.
--
H.J.