mirror/libcpuid
1
0
Fork 0
mirror of https://github.com/anrieff/libcpuid synced 2025-10-13 11:10:39 +00:00
Code Issues Releases Wiki Activity

Better support for AVX, AVX2, BMI1 and BMI2 instruction set detection.

Browse source 
- Detect AVX and AVX2 on both Intel and AMD CPUs
- Detect BMI1 and BMI2 instruction sets (BMI2 is only on Haswell, BMI1 is
  also present on Bulldozers).
- Fix tests to reflect changes.
This commit is contained in:
Veselin Georgiev 2015-04-16 20:54:37 +03:00
commit 046d2ca2ab
6 changed files with 16 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

11
libcpuid/cpuid_main.c
View file

@ -189,8 +189,14 @@ static void load_features_common(struct cpu_raw_data_t* raw, struct cpu_id_t* da
{ 19, CPU_FEATURE_SSE4_1 },
{ 21, CPU_FEATURE_X2APIC },
{ 23, CPU_FEATURE_POPCNT },
{ 28, CPU_FEATURE_AVX },
{ 29, CPU_FEATURE_F16C },
};
const struct feature_map_t matchtable_ebx7[] = {
{ 3, CPU_FEATURE_BMI1 },
{ 5, CPU_FEATURE_AVX2 },
{ 8, CPU_FEATURE_BMI2 },
};
const struct feature_map_t matchtable_edx81[] = {
{ 11, CPU_FEATURE_SYSCALL },
{ 27, CPU_FEATURE_RDTSCP },
@ -206,6 +212,9 @@ static void load_features_common(struct cpu_raw_data_t* raw, struct cpu_id_t* da
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] >= 0x80000001) {
match_features(matchtable_edx81, COUNT_OF(matchtable_edx81), raw->ext_cpuid[1][3], data);
match_features(matchtable_ecx81, COUNT_OF(matchtable_ecx81), raw->ext_cpuid[1][2], data);
@ -578,6 +587,8 @@ const char* cpu_feature_str(cpu_feature_t feature)
{ CPU_FEATURE_PFI, "pfi" },
{ CPU_FEATURE_PA, "pa" },
{ CPU_FEATURE_AVX2, "avx2" },
{ CPU_FEATURE_BMI1, "bmi1" },
{ CPU_FEATURE_BMI2, "bmi2" },
};
unsigned i, n = COUNT_OF(matchtable);
if (n != NUM_CPU_FEATURES) {