diff options
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 6 | ||||
| -rw-r--r-- | libgcc/config/i386/i386-cpuinfo.c | 21 |
2 files changed, 23 insertions, 4 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 831fa12..16fb553 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,9 @@ +2012-04-25 Sriraman Tallam <tmsriram@google.com> + + * config/i386/i386-cpuinfo.c (FEATURE_AVX2): New enum value. + (get_available_features): New argument. Check for AVX2. + (__cpu_indicator_init): Modify call to get_available_features. + 2012-04-25 Alan Modra <amodra@gmail.com> * config/rs6000/crtsavevr.S: New file. diff --git a/libgcc/config/i386/i386-cpuinfo.c b/libgcc/config/i386/i386-cpuinfo.c index dccf1d5..6934778 100644 --- a/libgcc/config/i386/i386-cpuinfo.c +++ b/libgcc/config/i386/i386-cpuinfo.c @@ -75,7 +75,8 @@ enum processor_features FEATURE_SSSE3, FEATURE_SSE4_1, FEATURE_SSE4_2, - FEATURE_AVX + FEATURE_AVX, + FEATURE_AVX2 }; struct __processor_model @@ -191,8 +192,11 @@ get_intel_cpu (unsigned int family, unsigned int model, unsigned int brand_id) } } +/* ECX and EDX are output of CPUID at level one. MAX_CPUID_LEVEL is + the max possible level of CPUID insn. */ static void -get_available_features (unsigned int ecx, unsigned int edx) +get_available_features (unsigned int ecx, unsigned int edx, + int max_cpuid_level) { unsigned int features = 0; @@ -217,6 +221,15 @@ get_available_features (unsigned int ecx, unsigned int edx) if (ecx & bit_AVX) features |= (1 << FEATURE_AVX); + /* Get Advanced Features at level 7 (eax = 7, ecx = 0). */ + if (max_cpuid_level >= 7) + { + unsigned int eax, ebx, ecx, edx; + __cpuid_count (7, 0, eax, ebx, ecx, edx); + if (ebx & bit_AVX2) + features |= (1 << FEATURE_AVX2); + } + __cpu_model.__cpu_features[0] = features; } @@ -296,7 +309,7 @@ __cpu_indicator_init (void) /* Get CPU type. */ get_intel_cpu (family, model, brand_id); /* Find available features. */ - get_available_features (ecx, edx); + get_available_features (ecx, edx, max_level); __cpu_model.__cpu_vendor = VENDOR_INTEL; } else if (vendor == SIG_AMD) @@ -311,7 +324,7 @@ __cpu_indicator_init (void) /* Get CPU type. */ get_amd_cpu (family, model); /* Find available features. */ - get_available_features (ecx, edx); + get_available_features (ecx, edx, max_level); __cpu_model.__cpu_vendor = VENDOR_AMD; } else |