[llvm] b329179 - [X86] Enable EVEX512 when host CPU has AVX512 (#90479)
via llvm-commits
llvm-commits at lists.llvm.org
Mon Apr 29 19:09:46 PDT 2024
Author: Phoebe Wang
Date: 2024-04-30T10:09:41+08:00
New Revision: b3291793f11924a3b62601aabebebdcfbb12a9a1
URL: https://github.com/llvm/llvm-project/commit/b3291793f11924a3b62601aabebebdcfbb12a9a1
DIFF: https://github.com/llvm/llvm-project/commit/b3291793f11924a3b62601aabebebdcfbb12a9a1.diff
LOG: [X86] Enable EVEX512 when host CPU has AVX512 (#90479)
This is used when -march=native run on an unknown CPU to old version of
LLVM.
Added:
Modified:
llvm/lib/TargetParser/Host.cpp
Removed:
################################################################################
diff --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index 0a93b06f40c248..e911d15498545c 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -1287,8 +1287,10 @@ static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf,
setFeature(X86::FEATURE_AVX2);
if (HasLeaf7 && ((EBX >> 8) & 1))
setFeature(X86::FEATURE_BMI2);
- if (HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save)
+ if (HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save) {
setFeature(X86::FEATURE_AVX512F);
+ setFeature(X86::FEATURE_EVEX512);
+ }
if (HasLeaf7 && ((EBX >> 17) & 1) && HasAVX512Save)
setFeature(X86::FEATURE_AVX512DQ);
if (HasLeaf7 && ((EBX >> 19) & 1))
@@ -1799,6 +1801,7 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
Features["rtm"] = HasLeaf7 && ((EBX >> 11) & 1);
// AVX512 is only supported if the OS supports the context save for it.
Features["avx512f"] = HasLeaf7 && ((EBX >> 16) & 1) && HasAVX512Save;
+ Features["evex512"] = Features["avx512f"];
Features["avx512dq"] = HasLeaf7 && ((EBX >> 17) & 1) && HasAVX512Save;
Features["rdseed"] = HasLeaf7 && ((EBX >> 18) & 1);
Features["adx"] = HasLeaf7 && ((EBX >> 19) & 1);
More information about the llvm-commits
mailing list