forked from OSchip/llvm-project
[X86] Reorder and reformat the feature bit checks in getHostCPUFeatues to keep the bits in order per register and encourage future additions to be in order too.
llvm-svn: 318633
This commit is contained in:
Craig Topper
parent
00fd43b327
commit
1af7e4424f
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@ -1183,49 +1183,48 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
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getX86CpuIDAndInfo(1, &EAX, &EBX, &ECX, &EDX);
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Features["cmov"] = (EDX >> 15) & 1;
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Features["mmx"] = (EDX >> 23) & 1;
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Features["sse"] = (EDX >> 25) & 1;
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Features["sse2"] = (EDX >> 26) & 1;
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Features["sse3"] = (ECX >> 0) & 1;
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Features["ssse3"] = (ECX >> 9) & 1;
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Features["cmov"] = (EDX >> 15) & 1;
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Features["mmx"] = (EDX >> 23) & 1;
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Features["sse"] = (EDX >> 25) & 1;
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Features["sse2"] = (EDX >> 26) & 1;
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Features["sse3"] = (ECX >> 0) & 1;
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Features["pclmul"] = (ECX >> 1) & 1;
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Features["ssse3"] = (ECX >> 9) & 1;
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Features["cx16"] = (ECX >> 13) & 1;
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Features["sse4.1"] = (ECX >> 19) & 1;
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Features["sse4.2"] = (ECX >> 20) & 1;
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Features["pclmul"] = (ECX >> 1) & 1;
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Features["cx16"] = (ECX >> 13) & 1;
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Features["movbe"] = (ECX >> 22) & 1;
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Features["movbe"] = (ECX >> 22) & 1;
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Features["popcnt"] = (ECX >> 23) & 1;
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Features["aes"] = (ECX >> 25) & 1;
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Features["rdrnd"] = (ECX >> 30) & 1;
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Features["aes"] = (ECX >> 25) & 1;
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Features["rdrnd"] = (ECX >> 30) & 1;
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// If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
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// indicates that the AVX registers will be saved and restored on context
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// switch, then we have full AVX support.
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bool HasAVXSave = ((ECX >> 27) & 1) && ((ECX >> 28) & 1) &&
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!getX86XCR0(&EAX, &EDX) && ((EAX & 0x6) == 0x6);
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Features["avx"] = HasAVXSave;
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Features["fma"] = HasAVXSave && (ECX >> 12) & 1;
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Features["f16c"] = HasAVXSave && (ECX >> 29) & 1;
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// Only enable XSAVE if OS has enabled support for saving YMM state.
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Features["xsave"] = HasAVXSave && (ECX >> 26) & 1;
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// AVX512 requires additional context to be saved by the OS.
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bool HasAVX512Save = HasAVXSave && ((EAX & 0xe0) == 0xe0);
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Features["avx"] = HasAVXSave;
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Features["fma"] = ((ECX >> 12) & 1) && HasAVXSave;
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// Only enable XSAVE if OS has enabled support for saving YMM state.
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Features["xsave"] = ((ECX >> 26) & 1) && HasAVXSave;
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Features["f16c"] = ((ECX >> 29) & 1) && HasAVXSave;
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unsigned MaxExtLevel;
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getX86CpuIDAndInfo(0x80000000, &MaxExtLevel, &EBX, &ECX, &EDX);
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bool HasExtLeaf1 = MaxExtLevel >= 0x80000001 &&
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!getX86CpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
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Features["lzcnt"] = HasExtLeaf1 && ((ECX >> 5) & 1);
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Features["sse4a"] = HasExtLeaf1 && ((ECX >> 6) & 1);
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Features["prfchw"] = HasExtLeaf1 && ((ECX >> 8) & 1);
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Features["xop"] = HasExtLeaf1 && ((ECX >> 11) & 1) && HasAVXSave;
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Features["lwp"] = HasExtLeaf1 && ((ECX >> 15) & 1);
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Features["fma4"] = HasExtLeaf1 && ((ECX >> 16) & 1) && HasAVXSave;
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Features["tbm"] = HasExtLeaf1 && ((ECX >> 21) & 1);
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Features["lzcnt"] = HasExtLeaf1 && ((ECX >> 5) & 1);
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Features["sse4a"] = HasExtLeaf1 && ((ECX >> 6) & 1);
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Features["prfchw"] = HasExtLeaf1 && ((ECX >> 8) & 1);
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Features["xop"] = HasExtLeaf1 && ((ECX >> 11) & 1) && HasAVXSave;
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Features["lwp"] = HasExtLeaf1 && ((ECX >> 15) & 1);
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Features["fma4"] = HasExtLeaf1 && ((ECX >> 16) & 1) && HasAVXSave;
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Features["tbm"] = HasExtLeaf1 && ((ECX >> 21) & 1);
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Features["mwaitx"] = HasExtLeaf1 && ((ECX >> 29) & 1);
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bool HasExtLeaf8 = MaxExtLevel >= 0x80000008 &&
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@ -1235,43 +1234,40 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
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bool HasLeaf7 =
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MaxLevel >= 7 && !getX86CpuIDAndInfoEx(0x7, 0x0, &EAX, &EBX, &ECX, &EDX);
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Features["fsgsbase"] = HasLeaf7 && ((EBX >> 0) & 1);
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Features["sgx"] = HasLeaf7 && ((EBX >> 2) & 1);
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Features["bmi"] = HasLeaf7 && ((EBX >> 3) & 1);
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// AVX2 is only supported if we have the OS save support from AVX.
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Features["avx2"] = HasAVXSave && HasLeaf7 && ((EBX >> 5) & 1);
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Features["fsgsbase"] = HasLeaf7 && ((EBX >> 0) & 1);
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Features["sgx"] = HasLeaf7 && ((EBX >> 2) & 1);
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Features["bmi"] = HasLeaf7 && ((EBX >> 3) & 1);
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Features["bmi2"] = HasLeaf7 && ((EBX >> 8) & 1);
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Features["rtm"] = HasLeaf7 && ((EBX >> 11) & 1);
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Features["rdseed"] = HasLeaf7 && ((EBX >> 18) & 1);
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Features["adx"] = HasLeaf7 && ((EBX >> 19) & 1);
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Features["clflushopt"] = HasLeaf7 && ((EBX >> 23) & 1);
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Features["clwb"] = HasLeaf7 && ((EBX >> 24) & 1);
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Features["sha"] = HasLeaf7 && ((EBX >> 29) & 1);
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Features["avx2"] = HasLeaf7 && ((EBX >> 5) & 1) && HasAVXSave;
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Features["bmi2"] = HasLeaf7 && ((EBX >> 8) & 1);
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Features["rtm"] = HasLeaf7 && ((EBX >> 11) & 1);
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// AVX512 is only supported if the OS supports the context save for it.
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Features["avx512f"] = HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save;
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Features["avx512dq"] = HasLeaf7 && ((EBX >> 17) & 1) && HasAVX512Save;
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Features["avx512f"] = HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save;
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Features["avx512dq"] = HasLeaf7 && ((EBX >> 17) & 1) && HasAVX512Save;
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Features["rdseed"] = HasLeaf7 && ((EBX >> 18) & 1);
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Features["adx"] = HasLeaf7 && ((EBX >> 19) & 1);
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Features["avx512ifma"] = HasLeaf7 && ((EBX >> 21) & 1) && HasAVX512Save;
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Features["avx512pf"] = HasLeaf7 && ((EBX >> 26) & 1) && HasAVX512Save;
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Features["avx512er"] = HasLeaf7 && ((EBX >> 27) & 1) && HasAVX512Save;
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Features["avx512cd"] = HasLeaf7 && ((EBX >> 28) & 1) && HasAVX512Save;
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Features["avx512bw"] = HasLeaf7 && ((EBX >> 30) & 1) && HasAVX512Save;
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Features["avx512vl"] = HasLeaf7 && ((EBX >> 31) & 1) && HasAVX512Save;
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Features["clflushopt"] = HasLeaf7 && ((EBX >> 23) & 1);
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Features["clwb"] = HasLeaf7 && ((EBX >> 24) & 1);
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Features["avx512pf"] = HasLeaf7 && ((EBX >> 26) & 1) && HasAVX512Save;
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Features["avx512er"] = HasLeaf7 && ((EBX >> 27) & 1) && HasAVX512Save;
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Features["avx512cd"] = HasLeaf7 && ((EBX >> 28) & 1) && HasAVX512Save;
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Features["sha"] = HasLeaf7 && ((EBX >> 29) & 1);
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Features["avx512bw"] = HasLeaf7 && ((EBX >> 30) & 1) && HasAVX512Save;
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Features["avx512vl"] = HasLeaf7 && ((EBX >> 31) & 1) && HasAVX512Save;
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Features["prefetchwt1"] = HasLeaf7 && (ECX & 1);
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Features["avx512vbmi"] = HasLeaf7 && ((ECX >> 1) & 1) && HasAVX512Save;
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Features["prefetchwt1"] = HasLeaf7 && ((ECX >> 0) & 1);
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Features["avx512vbmi"] = HasLeaf7 && ((ECX >> 1) & 1) && HasAVX512Save;
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Features["avx512vpopcntdq"] = HasLeaf7 && ((ECX >> 14) & 1) && HasAVX512Save;
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// Enable protection keys
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Features["pku"] = HasLeaf7 && ((ECX >> 4) & 1);
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Features["pku"] = HasLeaf7 && ((ECX >> 4) & 1);
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bool HasLeafD = MaxLevel >= 0xd &&
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!getX86CpuIDAndInfoEx(0xd, 0x1, &EAX, &EBX, &ECX, &EDX);
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// Only enable XSAVE if OS has enabled support for saving YMM state.
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Features["xsaveopt"] = HasAVXSave && HasLeafD && ((EAX >> 0) & 1);
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Features["xsavec"] = HasAVXSave && HasLeafD && ((EAX >> 1) & 1);
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Features["xsaves"] = HasAVXSave && HasLeafD && ((EAX >> 3) & 1);
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Features["xsaveopt"] = HasLeafD && ((EAX >> 0) & 1) && HasAVXSave;
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Features["xsavec"] = HasLeafD && ((EAX >> 1) & 1) && HasAVXSave;
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Features["xsaves"] = HasLeafD && ((EAX >> 3) & 1) && HasAVXSave;
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return true;
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}
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