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Code Issues Releases Wiki Activity

Move AMD extra flags to its own function

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This commit is contained in:
Corentin Le Molgat 2020-03-12 10:18:11 +01:00 committed by Mizux
parent 3262a55118
commit 404e462cd4
1 changed files with 26 additions and 4 deletions
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30
src/cpuinfo_x86.c
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@ -1043,8 +1043,6 @@ static void ParseLeaf4(const int max_cpuid_leaf, CacheInfo* info) {
static void ParseCpuId(const uint32_t max_cpuid_leaf, X86Info* info) {
const Leaf leaf_1 = SafeCpuId(max_cpuid_leaf, 1);
const Leaf leaf_7 = SafeCpuId(max_cpuid_leaf, 7);
const Leaf leaf_80000000 = CpuId(0x80000000);
const Leaf leaf_80000001 = SafeCpuId(leaf_80000000.eax, 0x80000001);
const bool have_xsave = IsBitSet(leaf_1.ecx, 26);
const bool have_osxsave = IsBitSet(leaf_1.ecx, 27);
@ -1099,11 +1097,9 @@ static void ParseCpuId(const uint32_t max_cpuid_leaf, X86Info* info) {
features->ssse3 = IsBitSet(leaf_1.ecx, 9);
features->sse4_1 = IsBitSet(leaf_1.ecx, 19);
features->sse4_2 = IsBitSet(leaf_1.ecx, 20);
features->sse4a = IsBitSet(leaf_80000001.ecx, 6);
}
if (have_avx_os_support) {
features->fma4 = IsBitSet(leaf_80000001.ecx, 16);
features->fma3 = IsBitSet(leaf_1.ecx, 12);
features->avx = IsBitSet(leaf_1.ecx, 28);
features->avx2 = IsBitSet(leaf_7.ebx, 5);
@ -1128,6 +1124,29 @@ static void ParseCpuId(const uint32_t max_cpuid_leaf, X86Info* info) {
}
}
// Reference https://en.wikipedia.org/wiki/CPUID#EAX=80000000h:_Get_Highest_Extended_Function_Implemented.
static void ParseExtraAMDCpuId(const uint32_t max_cpuid_leaf, X86Info* info) {
const Leaf leaf_1 = SafeCpuId(max_cpuid_leaf, 1);
const Leaf leaf_80000000 = CpuId(0x80000000);
const Leaf leaf_80000001 = SafeCpuId(leaf_80000000.eax, 0x80000001);
const bool have_xsave = IsBitSet(leaf_1.ecx, 26);
const bool have_osxsave = IsBitSet(leaf_1.ecx, 27);
const uint32_t xcr0_eax = (have_xsave && have_osxsave) ? GetXCR0Eax() : 0;
const bool have_sse_os_support = HasXmmOsXSave(xcr0_eax);
const bool have_avx_os_support = HasYmmOsXSave(xcr0_eax);
X86Features* const features = &info->features;
if (have_sse_os_support) {
features->sse4a = IsBitSet(leaf_80000001.ecx, 6);
}
if (have_avx_os_support) {
features->fma4 = IsBitSet(leaf_80000001.ecx, 16);
}
}
static const X86Info kEmptyX86Info;
static const CacheInfo kEmptyCacheInfo;
@ -1139,6 +1158,9 @@ X86Info GetX86Info(void) {
if (IsVendor(leaf_0, "GenuineIntel") || IsVendor(leaf_0, "AuthenticAMD")) {
ParseCpuId(max_cpuid_leaf, &info);
}
if (IsVendor(leaf_0, "AuthenticAMD")) {
ParseExtraAMDCpuId(max_cpuid_leaf, &info);
}
return info;
}