src/base/cpu.cc - Issue 878063002: [x86] Disable AVX unless the operating system explicitly claims to support it.

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Unified Diff: src/base/cpu.cc

Issue 878063002: [x86] Disable AVX unless the operating system explicitly claims to support it. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master

Patch Set: Fix compilation. Created 5 years, 11 months ago

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Index: src/base/cpu.cc

diff --git a/src/base/cpu.cc b/src/base/cpu.cc

index b5786a57f35f3d256e8fb20035a7cff99a930868..fa212e0e045b572078f9782cbbc49020d00f4cb7 100644

--- a/src/base/cpu.cc

+++ b/src/base/cpu.cc

@@ -316,6 +316,7 @@ CPU::CPU()

has_sse41_(false),

has_sse42_(false),

is_atom_(false),

+ has_osxsave_(false),

has_avx_(false),

has_fma3_(false),

has_idiva_(false),

@@ -364,8 +365,9 @@ CPU::CPU()

has_ssse3_ = (cpu_info[2] & 0x00000200) != 0;

has_sse41_ = (cpu_info[2] & 0x00080000) != 0;

has_sse42_ = (cpu_info[2] & 0x00100000) != 0;

+ has_osxsave_ = (cpu_info[2] & 0x08000000) != 0;

has_avx_ = (cpu_info[2] & 0x10000000) != 0;

- if (has_avx_) has_fma3_ = (cpu_info[2] & 0x00001000) != 0;

+ has_fma3_ = (cpu_info[2] & 0x00001000) != 0;

if (family_ == 0x6) {

switch (model_) {

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