diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 12f79302d6b..040aa0567a2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-09-13  Venkataramanan Kumar  <venkataramanan.kumar@amd.com>
+
+	* config/i386/i386.c (processor_alias_table): Enable PTA_PRFCHW
+	for targets bdver1, bdver2, btver1 and btver2.
+
 2012-09-13  Christophe Lyon  <christophe.lyon@linaro.org>
 	    Richard Earnshaw  <rearnsha@arm.com>
 
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 63dde81f444..c5481cd1e58 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -3152,7 +3152,7 @@ ix86_option_override_internal (bool main_args_p)
 	| 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}, 
       {"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},
@@ -3160,23 +3160,23 @@ ix86_option_override_internal (bool main_args_p)
 	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_FMA4
 	| 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.  */ },