diff options
Diffstat (limited to 'vendor/golang.org/x/sys/cpu/cpu_x86.go')
| -rw-r--r-- | vendor/golang.org/x/sys/cpu/cpu_x86.go | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/vendor/golang.org/x/sys/cpu/cpu_x86.go b/vendor/golang.org/x/sys/cpu/cpu_x86.go index 5ea287b7e..f5aacfc82 100644 --- a/vendor/golang.org/x/sys/cpu/cpu_x86.go +++ b/vendor/golang.org/x/sys/cpu/cpu_x86.go @@ -90,9 +90,10 @@ func archInit() { osSupportsAVX = isSet(1, eax) && isSet(2, eax) if runtime.GOOS == "darwin" { - // Check darwin commpage for AVX512 support. Necessary because: - // https://github.com/apple/darwin-xnu/blob/0a798f6738bc1db01281fc08ae024145e84df927/osfmk/i386/fpu.c#L175-L201 - osSupportsAVX512 = osSupportsAVX && darwinSupportsAVX512() + // Darwin doesn't save/restore AVX-512 mask registers correctly across signal handlers. + // Since users can't rely on mask register contents, let's not advertise AVX-512 support. + // See issue 49233. + osSupportsAVX512 = false } else { // Check if OPMASK and ZMM registers have OS support. osSupportsAVX512 = osSupportsAVX && isSet(5, eax) && isSet(6, eax) && isSet(7, eax) |