diff options
| author | Ian Lance Taylor <iant@golang.org> | 2022-02-11 14:53:56 -0800 |
|---|---|---|
| committer | Ian Lance Taylor <iant@golang.org> | 2022-02-11 15:01:19 -0800 |
| commit | 8dc2499aa62f768c6395c9754b8cabc1ce25c494 (patch) | |
| tree | 43d7fd2bbfd7ad8c9625a718a5e8718889351994 /libgo/go/golang.org/x/sys/cpu | |
| parent | 9a56779dbc4e2d9c15be8d31e36f2f59be7331a8 (diff) | |
| download | gcc-8dc2499aa62f768c6395c9754b8cabc1ce25c494.tar.gz | |
libgo: update to Go1.18beta2
gotools/
* Makefile.am (go_cmd_cgo_files): Add ast_go118.go
(check-go-tool): Copy golang.org/x/tools directories.
* Makefile.in: Regenerate.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/384695
Diffstat (limited to 'libgo/go/golang.org/x/sys/cpu')
| -rw-r--r-- | libgo/go/golang.org/x/sys/cpu/cpu.go | 1 | ||||
| -rw-r--r-- | libgo/go/golang.org/x/sys/cpu/cpu_gc_x86.go | 4 | ||||
| -rw-r--r-- | libgo/go/golang.org/x/sys/cpu/cpu_x86.go | 9 |
3 files changed, 7 insertions, 7 deletions
diff --git a/libgo/go/golang.org/x/sys/cpu/cpu.go b/libgo/go/golang.org/x/sys/cpu/cpu.go index abbec2d44bf..b56886f2616 100644 --- a/libgo/go/golang.org/x/sys/cpu/cpu.go +++ b/libgo/go/golang.org/x/sys/cpu/cpu.go @@ -56,6 +56,7 @@ var X86 struct { HasAVX512BF16 bool // Advanced vector extension 512 BFloat16 Instructions HasBMI1 bool // Bit manipulation instruction set 1 HasBMI2 bool // Bit manipulation instruction set 2 + HasCX16 bool // Compare and exchange 16 Bytes HasERMS bool // Enhanced REP for MOVSB and STOSB HasFMA bool // Fused-multiply-add instructions HasOSXSAVE bool // OS supports XSAVE/XRESTOR for saving/restoring XMM registers. diff --git a/libgo/go/golang.org/x/sys/cpu/cpu_gc_x86.go b/libgo/go/golang.org/x/sys/cpu/cpu_gc_x86.go index 3298a87e981..fa7cdb9bcd5 100644 --- a/libgo/go/golang.org/x/sys/cpu/cpu_gc_x86.go +++ b/libgo/go/golang.org/x/sys/cpu/cpu_gc_x86.go @@ -15,7 +15,3 @@ func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32) // xgetbv with ecx = 0 is implemented in cpu_x86.s for gc compiler // and in cpu_gccgo.c for gccgo. func xgetbv() (eax, edx uint32) - -// darwinSupportsAVX512 is implemented in cpu_x86.s for gc compiler -// and in cpu_gccgo_x86.go for gccgo. -func darwinSupportsAVX512() bool diff --git a/libgo/go/golang.org/x/sys/cpu/cpu_x86.go b/libgo/go/golang.org/x/sys/cpu/cpu_x86.go index e50ed987599..1a99e94fee0 100644 --- a/libgo/go/golang.org/x/sys/cpu/cpu_x86.go +++ b/libgo/go/golang.org/x/sys/cpu/cpu_x86.go @@ -39,6 +39,7 @@ func initOptions() { {Name: "avx512bf16", Feature: &X86.HasAVX512BF16}, {Name: "bmi1", Feature: &X86.HasBMI1}, {Name: "bmi2", Feature: &X86.HasBMI2}, + {Name: "cx16", Feature: &X86.HasCX16}, {Name: "erms", Feature: &X86.HasERMS}, {Name: "fma", Feature: &X86.HasFMA}, {Name: "osxsave", Feature: &X86.HasOSXSAVE}, @@ -73,6 +74,7 @@ func archInit() { X86.HasPCLMULQDQ = isSet(1, ecx1) X86.HasSSSE3 = isSet(9, ecx1) X86.HasFMA = isSet(12, ecx1) + X86.HasCX16 = isSet(13, ecx1) X86.HasSSE41 = isSet(19, ecx1) X86.HasSSE42 = isSet(20, ecx1) X86.HasPOPCNT = isSet(23, ecx1) @@ -88,9 +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) |