Compute extend family info for AMD CPU and update for BTVER2

From-SVN: r213544

gcc/ChangeLog

+2014-08-04 Ganesh Gopalasubramanian  <Ganesh.Gopalasubramanian@amd.com>
+
+	* config/i386/driver-i386.c (host_detect_local_cpu): Handle AMD's extended
+	family information. Handle BTVER2 cpu with cpuid family value.
+
 2014-08-04  Tom de Vries  <tom@codesourcery.com>
 
 	* doc/sourcebuild.texi (glibc, glibc_2_12_or_later)

gcc/config/i386/driver-i386.c

@@ -432,7 +432,8 @@ const char *host_detect_local_cpu (int argc, const char **argv)
 
   model = (eax >> 4) & 0x0f;
   family = (eax >> 8) & 0x0f;
-  if (vendor == signature_INTEL_ebx)
+  if (vendor == signature_INTEL_ebx
+      || vendor == signature_AMD_ebx)
     {
       unsigned int extended_model, extended_family;
 
@@ -576,7 +577,7 @@ const char *host_detect_local_cpu (int argc, const char **argv)
 
       if (name == signature_NSC_ebx)
 	processor = PROCESSOR_GEODE;
-      else if (has_movbe)
+      else if (has_movbe && family == 22)
 	processor = PROCESSOR_BTVER2;
       else if (has_avx2)
         processor = PROCESSOR_BDVER4;