[PATCH, i386]: Update processor_alias_table for missing PTA_PRFCHW and PTA_FXSR flags

[Uros Bizjak <ubizjak at gmail dot com>]

Hello!

Attached patch adds missing PTA_PRFCHW and PTA_FXSR flags to x86
processor alias table. PRFCHW CPUID flag is shared with 3dnow prefetch
flag, so some additional logic is needed to avoid generating SSE
prefetches for non-SSE 3dNow! targets, while still generating full set
of 3dnow prefetches on 3dNow! targets.

2013-05-15  Uros Bizjak  <ubizjak@gmail.com>

    * config/i386/i386.c (iy86_option_override_internal): Update
    processor_alias_table for missing PTA_PRFCHW and PTA_FXSR flags.  Add
    PTA_POPCNT to corei7 entry and remove PTA_SSE from athlon-4 entry.
    Do not enable SSE prefetch on non-SSE 3dNow! targets.  Enable
    TARGET_PRFCHW for TARGET_3DNOW targets.
    * config/i386/i386.md (prefetch): Enable for TARGET_PRFCHW instead
    of TARGET_3DNOW.
    (*prefetch_3dnow): Enable for TARGET_PRFCHW only.

Patch was bootstrapped and regression tested on x86_64-pc-linux-gnu
{,-m32}  and was committed to mainline SVN. The patch will be
backported to 4.8 branch in a couple of days.

Uros.

Attachment: p.diff.txt
Description: Text document