Thank you Uros for the patch. Could you backport this to the 4.8.0?
-----Original Message-----
From: Uros Bizjak [mailto:ubiz...@gmail.com]
Sent: Wednesday, May 15, 2013 11:16 PM
To: gcc-patches@gcc.gnu.org
Cc: Gopalasubramanian, Ganesh
Subject: [PATCH, i386]: Update processor_alias_table for missing PTA_PRFCHW and
PTA_FXSR flags
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 <ubiz...@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.
