diff options
Diffstat (limited to 'base/cpu.cc')
| -rw-r--r-- | base/cpu.cc | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/base/cpu.cc b/base/cpu.cc index edba2c2..ecffb86 100644 --- a/base/cpu.cc +++ b/base/cpu.cc @@ -43,7 +43,6 @@ CPU::CPU() has_sse41_(false), has_sse42_(false), has_avx_(false), - has_avx_hardware_(false), has_avx2_(false), has_aesni_(false), has_non_stop_time_stamp_counter_(false), @@ -232,8 +231,6 @@ void CPU::Initialize() { has_ssse3_ = (cpu_info[2] & 0x00000200) != 0; has_sse41_ = (cpu_info[2] & 0x00080000) != 0; has_sse42_ = (cpu_info[2] & 0x00100000) != 0; - has_avx_hardware_ = - (cpu_info[2] & 0x10000000) != 0; // AVX instructions will generate an illegal instruction exception unless // a) they are supported by the CPU, // b) XSAVE is supported by the CPU and @@ -245,7 +242,7 @@ void CPU::Initialize() { // Because of that, we also test the XSAVE bit because its description in // the CPUID documentation suggests that it signals xgetbv support. has_avx_ = - has_avx_hardware_ && + (cpu_info[2] & 0x10000000) != 0 && (cpu_info[2] & 0x04000000) != 0 /* XSAVE */ && (cpu_info[2] & 0x08000000) != 0 /* OSXSAVE */ && (_xgetbv(0) & 6) == 6 /* XSAVE enabled by kernel */; |