re PR driver/54210 (gcc unable to detect -mprfchw flag in bulldozer machines)

	PR driver/54210
	* config/i386/driver-i386.c (host_detect_local_cpu): Test bit_PRFCHW
	bit of CPUID 0x80000001 %ecx instead of CPUID 7 %ecx.
	* config/i386/cpuid.h (bits_PRFCHW): Move definition to CPUID
	0x80000001 %ecx flags.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>
From-SVN: r190345

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 57c754b95359cf51227c3e6f30a3c483f0187733..54590f2453b35cc6962d906f4c9168733edf7841 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2012-08-13  Ganesh Gopalasubramanian  <Ganesh.Gopalasubramanian@amd.com>
+           Jakub Jelinek  <jakub@redhat.com>
+
+       PR driver/54210
+       * config/i386/driver-i386.c (host_detect_local_cpu): Test bit_PRFCHW
+       bit of CPUID 0x80000001 %ecx instead of CPUID 7 %ecx.
+       * config/i386/cpuid.h (bits_PRFCHW): Move definition to CPUID
+       0x80000001 %ecx flags.
+
 2012-08-13  Richard Guenther  <rguenther@suse.de>
 
        * tree-cfg.c (print_loop): Avoid ICEing for loops marked for

diff --git a/gcc/config/i386/cpuid.h b/gcc/config/i386/cpuid.h
index 1ac3174ef3a2d4540f2dc5583c80d5a5352992ea..a26dc9b415614852173f03e3862096b78ddf45e9 100644 (file)
--- a/gcc/config/i386/cpuid.h
+++ b/gcc/config/i386/cpuid.h
@@ -1,5 +1,6 @@
 /*
- * Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+ * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012
+ * Free Software Foundation, Inc.
  *
  * This file is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -52,6 +53,7 @@
 #define bit_LAHF_LM    (1 << 0)
 #define bit_ABM                (1 << 5)
 #define bit_SSE4a      (1 << 6)
+#define bit_PRFCHW     (1 << 8)
 #define bit_XOP         (1 << 11)
 #define bit_LWP        (1 << 15)
 #define bit_FMA4        (1 << 16)
@@ -69,7 +71,6 @@
 #define bit_HLE        (1 << 4)
 #define bit_AVX2       (1 << 5)
 #define bit_BMI2       (1 << 8)
-#define bit_PRFCHW     (1 << 8)
 #define bit_RTM        (1 << 11)
 #define bit_RDSEED     (1 << 18)
 #define bit_ADX        (1 << 19)

diff --git a/gcc/config/i386/driver-i386.c b/gcc/config/i386/driver-i386.c
index 0b56f3f47b1351ebdf6eba6d621a15a275ceece2..b5ae18f18b3d57b40211e5cad84870d6d5052257 100644 (file)
--- a/gcc/config/i386/driver-i386.c
+++ b/gcc/config/i386/driver-i386.c
@@ -1,5 +1,6 @@
 /* Subroutines for the gcc driver.
-   Copyright (C) 2006, 2007, 2008, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2006, 2007, 2008, 2010, 2011, 2012
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -467,7 +468,6 @@ const char *host_detect_local_cpu (int argc, const char **argv)
       has_bmi2 = ebx & bit_BMI2;
       has_fsgsbase = ebx & bit_FSGSBASE;
       has_rdseed = ebx & bit_RDSEED;
-      has_prfchw = ecx & bit_PRFCHW;
       has_adx = ebx & bit_ADX;
     }
 
@@ -488,6 +488,7 @@ const char *host_detect_local_cpu (int argc, const char **argv)
       has_xop = ecx & bit_XOP;
       has_tbm = ecx & bit_TBM;
       has_lzcnt = ecx & bit_LZCNT;
+      has_prfchw = ecx & bit_PRFCHW;
 
       has_longmode = edx & bit_LM;
       has_3dnowp = edx & bit_3DNOWP;