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Add support for detecting AVX2. Confirmed to detect on Haswell i3.

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This commit is contained in:
Veselin Georgiev 2014-09-24 00:03:11 +03:00
commit fa2083a992
4 changed files with 9 additions and 1 deletions
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1
libcpuid/cpuid_main.c
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@ -558,6 +558,7 @@ const char* cpu_feature_str(cpu_feature_t feature)
{ CPU_FEATURE_APERFMPERF, "aperfmperf" },
{ CPU_FEATURE_PFI, "pfi" },
{ CPU_FEATURE_PA, "pa" },
{ CPU_FEATURE_AVX2, "avx2" },
};
unsigned i, n = COUNT_OF(matchtable);
if (n != NUM_CPU_FEATURES) {

1
libcpuid/libcpuid.h
View file

@ -354,6 +354,7 @@ typedef enum {
CPU_FEATURE_APERFMPERF, /*!< MPERF/APERF MSRs support */
CPU_FEATURE_PFI, /*!< Processor Feedback Interface support */
CPU_FEATURE_PA, /*!< Processor accumulator */
CPU_FEATURE_AVX2, /*!< AVX2 instructions */
/* termination: */
NUM_CPU_FEATURES,
} cpu_feature_t;

6
libcpuid/recog_intel.c
View file

@ -362,6 +362,9 @@ static void load_intel_features(struct cpu_raw_data_t* raw, struct cpu_id_t* dat
{ 28, CPU_FEATURE_AVX },
{ 30, CPU_FEATURE_RDRAND },
};
const struct feature_map_t matchtable_ebx7[] = {
{ 5, CPU_FEATURE_AVX2 },
};
const struct feature_map_t matchtable_edx81[] = {
{ 20, CPU_FEATURE_XD },
};
@ -369,6 +372,9 @@ static void load_intel_features(struct cpu_raw_data_t* raw, struct cpu_id_t* dat
match_features(matchtable_edx1, COUNT_OF(matchtable_edx1), raw->basic_cpuid[1][3], data);
match_features(matchtable_ecx1, COUNT_OF(matchtable_ecx1), raw->basic_cpuid[1][2], data);
}
if (raw->basic_cpuid[0][0] >= 7) {
match_features(matchtable_ebx7, COUNT_OF(matchtable_ebx7), raw->basic_cpuid[7][1], data);
}
if (raw->ext_cpuid[0][0] >= 1) {
match_features(matchtable_edx81, COUNT_OF(matchtable_edx81), raw->ext_cpuid[1][3], data);
}