[PATCH,i386] Enable prefetchw in processor alias table for AMD targets

[venkataramanan.kumar]

Hi Maintainers,

This patch enables "prefetchw" ISA in the processor alias table for targets 
amdfam10,barcelona and bdver1,2 and btver1,2.

GCC regression test passes with the patch.

Ok for trunk?

Change log:

2012-09-11  Venkataramanan Kumar  <venkataramanan.ku...@amd.com>

    * config/i386/i386.c (processor_alias_table): Enable PTA_PRFCHW
    for targets amdfam10, barcelona, bdver1, bdver2, btver1 and btver2.

Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c      (revision 190345)
+++ gcc/config/i386/i386.c      (working copy)
@@ -3151,31 +3151,33 @@
        | PTA_SSE2 | PTA_NO_SAHF},
       {"amdfam10", PROCESSOR_AMDFAM10, CPU_AMDFAM10,
        PTA_64BIT | PTA_MMX | PTA_3DNOW | PTA_3DNOW_A | PTA_SSE
-       | PTA_SSE2 | PTA_SSE3 | PTA_SSE4A | PTA_CX16 | PTA_ABM},
+       | PTA_SSE2 | PTA_SSE3 | PTA_SSE4A | PTA_CX16 | PTA_ABM 
+       | PTA_PRFCHW},
       {"barcelona", PROCESSOR_AMDFAM10, CPU_AMDFAM10,
        PTA_64BIT | PTA_MMX | PTA_3DNOW | PTA_3DNOW_A | PTA_SSE
-       | PTA_SSE2 | PTA_SSE3 | PTA_SSE4A | PTA_CX16 | PTA_ABM},
+       | PTA_SSE2 | PTA_SSE3 | PTA_SSE4A | PTA_CX16 | PTA_ABM
+       | PTA_PRFCHW},
       {"bdver1", PROCESSOR_BDVER1, CPU_BDVER1,
        PTA_64BIT | PTA_MMX | PTA_SSE | PTA_SSE2 | PTA_SSE3
        | PTA_SSE4A | PTA_CX16 | PTA_ABM | PTA_SSSE3 | PTA_SSE4_1
        | PTA_SSE4_2 | PTA_AES | PTA_PCLMUL | PTA_AVX | PTA_FMA4
-       | PTA_XOP | PTA_LWP},
+       | PTA_XOP | PTA_LWP | PTA_PRFCHW},
       {"bdver2", PROCESSOR_BDVER2, CPU_BDVER2,
        PTA_64BIT | PTA_MMX | PTA_SSE | PTA_SSE2 | PTA_SSE3
        | PTA_SSE4A | PTA_CX16 | PTA_ABM | PTA_SSSE3 | PTA_SSE4_1
        | PTA_SSE4_2 | PTA_AES | PTA_PCLMUL | PTA_AVX
        | PTA_XOP | PTA_LWP | PTA_BMI | PTA_TBM | PTA_F16C
-       | PTA_FMA},
+       | PTA_FMA | PTA_PRFCHW},
       {"btver1", PROCESSOR_BTVER1, CPU_GENERIC64,
         PTA_64BIT | PTA_MMX |  PTA_SSE  | PTA_SSE2 | PTA_SSE3
-        | PTA_SSSE3 | PTA_SSE4A |PTA_ABM | PTA_CX16},
+        | PTA_SSSE3 | PTA_SSE4A |PTA_ABM | PTA_CX16 | PTA_PRFCHW},
       {"generic32", PROCESSOR_GENERIC32, CPU_PENTIUMPRO,
        PTA_HLE /* flags are only used for -march switch.  */ },
       {"btver2", PROCESSOR_BTVER2, CPU_GENERIC64,
        PTA_64BIT | PTA_MMX |  PTA_SSE  | PTA_SSE2 | PTA_SSE3
        | PTA_SSSE3 | PTA_SSE4A |PTA_ABM | PTA_CX16 | PTA_SSE4_1
        | PTA_SSE4_2 | PTA_AES | PTA_PCLMUL | PTA_AVX
-       | PTA_BMI | PTA_F16C | PTA_MOVBE},
+       | PTA_BMI | PTA_F16C | PTA_MOVBE | PTA_PRFCHW},
       {"generic64", PROCESSOR_GENERIC64, CPU_GENERIC64,
        PTA_64BIT
         | PTA_HLE /* flags are only used for -march switch.  */ },