On Wed, Sep 12, 2012 at 11:20 AM, Uros Bizjak <ubiz...@gmail.com> wrote:
> Hello!
>
> Newer AMD processors does not enable 3dNOW anymore. However, prefetchw
> depends on TARGET_3DNOW, so it is not generated anymore. Following
> patch is a 4.7 version of mainline patch [1].
>
> 2012-09-12 Uros Bizjak <ubiz...@gmail.com>
>
> * config/i386/i386.h (x86_prefetchw): New global variable.
> (TARGET_PREFETCHW): New macro.
> * config/i386/i386.c (PTA_PREFETCHW): Ditto.
> (processor_alias_table): Add PTA_PREFETCHW to
> bdver1, bdver2 and btver1.
> (ix86_option_override_internal): Set x86_prefetchw for
> PTA_PREFETCHW targets.
> * config/i386/i386.md (prefetch): Expand to prefetchw
> for TARGET_PREFETCHW.
> (*prefetch_3dnow_<mode>): Also enable for TARGET_PREFETCHW.
>
> Patch was bootstrapped and regression tested on x86_64-pc-linux-gnu
> {,-m32}. Will be committed to 4.7 branch after [1] is committed to
> mainline.
>
> [1] http://gcc.gnu.org/ml/gcc-patches/2012-09/msg00670.html
Do we need to update driver-i386.c?
--
H.J.
