diff options
| author | Tobias Klauser <tklauser@distanz.ch> | 2018-04-12 10:27:42 +0200 |
|---|---|---|
| committer | Tobias Klauser <tobias.klauser@gmail.com> | 2018-04-15 20:33:59 +0000 |
| commit | d0712096b32d032b0b83a5eb899a7359a830732b (patch) | |
| tree | 4e9e64a61b04f580ff844d5884fb4876505aff9d /src/runtime/asm_386.s | |
| parent | 284ba47b4916e3cf4f206494ad5a3577e20db9bf (diff) | |
| download | go-d0712096b32d032b0b83a5eb899a7359a830732b.tar.gz go-d0712096b32d032b0b83a5eb899a7359a830732b.zip | |
runtime: use internal/cpu.X86.HasAVX2 instead of support_avx2
After CL 104636 cpu.X86.HasAVX is set early enough that it can be used
in runtime·memclrNoHeapPointers. Add an offset to use in assembly and
replace the only occurence of support_avx2.
Change-Id: Icada62efeb3e24d71251d55623a8a8602364c9a8
Reviewed-on: https://go-review.googlesource.com/106595
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
Diffstat (limited to 'src/runtime/asm_386.s')
| -rw-r--r-- | src/runtime/asm_386.s | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/src/runtime/asm_386.s b/src/runtime/asm_386.s index e68f727076..28d045e416 100644 --- a/src/runtime/asm_386.s +++ b/src/runtime/asm_386.s @@ -184,11 +184,6 @@ eax7: MOVL $0, CX CPUID - // If OS support for XMM and YMM is not present - // support_avx2 will be set back to false later. - TESTL $(1<<5), BX - SETNE runtime·support_avx2(SB) - TESTL $(1<<9), BX // ERMS SETNE runtime·support_erms(SB) @@ -197,16 +192,13 @@ osavx: // for XMM and YMM OS support. #ifndef GOOS_nacl CMPB runtime·support_osxsave(SB), $1 - JNE noavx + JNE nocpuinfo MOVL $0, CX // For XGETBV, OSXSAVE bit is required and sufficient XGETBV ANDL $6, AX CMPL AX, $6 // Check for OS support of XMM and YMM registers. - JE nocpuinfo #endif -noavx: - MOVB $0, runtime·support_avx2(SB) nocpuinfo: // if there is an _cgo_init, call it to let it |