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[X86] Improve the unknown stepping support for Intel CPUs in getHostCPUName

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This patch improves our guessing of unknown Intel CPUs to support Goldmont and skylake-avx512.

Differential Revision: https://reviews.llvm.org/D35161

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309246 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2017-07-27 03:26:52 +00:00
parent 8d30f66962
commit 5e5b5e82eb
1 changed files with 22 additions and 2 deletions
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24
lib/Support/Host.cpp
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@ -380,7 +380,9 @@ enum ProcessorFeatures {
// Only one bit free left in the first 32 features.
FEATURE_MOVBE = 32,
FEATURE_ADX,
FEATURE_EM64T
FEATURE_EM64T,
FEATURE_CLFLUSHOPT,
FEATURE_SHA,
};
// The check below for i386 was copied from clang's cpuid.h (__get_cpuid_max).
@ -714,7 +716,21 @@ getIntelProcessorTypeAndSubtype(unsigned Family, unsigned Model,
default: // Unknown family 6 CPU, try to guess.
if (Features & (1 << FEATURE_AVX512F)) {
*Type = INTEL_KNL; // knl
if (Features & (1 << FEATURE_AVX512VL)) {
*Type = INTEL_COREI7;
*Subtype = INTEL_COREI7_SKYLAKE_AVX512;
} else {
*Type = INTEL_KNL; // knl
}
break;
}
if (Features2 & (1 << (FEATURE_CLFLUSHOPT - 32))) {
if (Features2 & (1 << (FEATURE_SHA - 32))) {
*Type = INTEL_GOLDMONT;
} else {
*Type = INTEL_COREI7;
*Subtype = INTEL_COREI7_SKYLAKE;
}
break;
}
if (Features2 & (1 << (FEATURE_ADX - 32))) {
@ -974,12 +990,16 @@ static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf,
Features2 |= 1 << (FEATURE_ADX - 32);
if (HasLeaf7 && ((EBX >> 21) & 1) && HasAVX512Save)
Features |= 1 << FEATURE_AVX512IFMA;
if (HasLeaf7 && ((EBX >> 23) & 1))
Features2 |= 1 << (FEATURE_CLFLUSHOPT - 32);
if (HasLeaf7 && ((EBX >> 26) & 1) && HasAVX512Save)
Features |= 1 << FEATURE_AVX512PF;
if (HasLeaf7 && ((EBX >> 27) & 1) && HasAVX512Save)
Features |= 1 << FEATURE_AVX512ER;
if (HasLeaf7 && ((EBX >> 28) & 1) && HasAVX512Save)
Features |= 1 << FEATURE_AVX512CD;
if (HasLeaf7 && ((EBX >> 29) & 1))
Features2 |= 1 << (FEATURE_SHA - 32);
if (HasLeaf7 && ((EBX >> 30) & 1) && HasAVX512Save)
Features |= 1 << FEATURE_AVX512BW;
if (HasLeaf7 && ((EBX >> 31) & 1) && HasAVX512Save)