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| author | eivanov89 <eivanov89@ydb.tech> | 2024-08-26 22:18:55 +0300 |
|---|---|---|
| committer | eivanov89 <eivanov89@ydb.tech> | 2024-08-26 22:30:33 +0300 |
| commit | 3b9d4493cea2c6bc1906ce9871aef82f389984a6 (patch) | |
| tree | e74631083a82b8858e5b6a675bf136dc297018af /util/system/cpu_id.cpp | |
| parent | 3c4a6a8a3c937c9788a0fb983ac1ad28473065fc (diff) | |
| download | ydb-3b9d4493cea2c6bc1906ce9871aef82f389984a6.tar.gz | |
KIKIMR-21908: fix a bug in CPUID/AVX512F call
f5e4678c0171915199008af5bb54f47adf0b34d4
Diffstat (limited to 'util/system/cpu_id.cpp')
| -rw-r--r-- | util/system/cpu_id.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/util/system/cpu_id.cpp b/util/system/cpu_id.cpp index 598c71f4d9..ad7299ddbc 100644 --- a/util/system/cpu_id.cpp +++ b/util/system/cpu_id.cpp @@ -169,11 +169,11 @@ bool NX86::HaveBMI2() noexcept { bool NX86::HaveAVX512F() noexcept { #if defined(_x86_) // https://software.intel.com/en-us/articles/how-to-detect-knl-instruction-support - return HaveOSXSAVE() // implies HaveXSAVE() - && (_xgetbv(0) & 6u) == 6u // XMM state and YMM state are enabled by OS - && ((_xgetbv(0) >> 5) & 7u) == 7u // ZMM state is enabled by OS - && TX86CpuInfo(0x0).EAX >= 0x7 // leaf 7 is present - && ((TX86CpuInfo(0x7).EBX >> 16) & 1u); // AVX512F bit + return HaveOSXSAVE() // implies HaveXSAVE() + && (_xgetbv(0) & 6u) == 6u // XMM state and YMM state are enabled by OS + && ((_xgetbv(0) >> 5) & 7u) == 7u // ZMM state is enabled by OS + && TX86CpuInfo(0x0).EAX >= 0x7 // leaf 7 is present + && ((TX86CpuInfo(0x7, 0).EBX >> 16) & 1u); // AVX512F bit #else return false; #endif |