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runtime: use internal/cpu instead of support_avx

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After CL 104636 cpu.X86.HasAVX is set early enough that it can be used
to determine useAVXmemmove. Use it and remove support_avx.

Change-Id: Ib7a627bede2bf96c92362507e742bd833cb42a74
Reviewed-on: https://go-review.googlesource.com/106235
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser 2018-04-11 09:57:18 +02:00 committed by Tobias Klauser
parent 51533fdac6
commit e0ac5f540b
5 changed files with 3 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/runtime/asm_386.s
View File

@ -176,11 +176,6 @@ notintel:
TESTL $(1<<27), DI // OSXSAVE
SETNE runtime·support_osxsave(SB)
// If OS support for XMM and YMM is not present
// support_avx will be set back to false later.
TESTL $(1<<28), DI // AVX
SETNE runtime·support_avx(SB)
eax7:
// Load EAX=7/ECX=0 cpuid flags
CMPL SI, $7
@ -211,7 +206,6 @@ osavx:
JE nocpuinfo
#endif
noavx:
MOVB $0, runtime·support_avx(SB)
MOVB $0, runtime·support_avx2(SB)
nocpuinfo:

6
src/runtime/asm_amd64.s
View File

@ -139,11 +139,6 @@ notintel:
TESTL $(1<<27), CX // OSXSAVE
SETNE runtime·support_osxsave(SB)
// If OS support for XMM and YMM is not present
// support_avx will be set back to false later.
TESTL $(1<<28), CX // AVX
SETNE runtime·support_avx(SB)
eax7:
// Load EAX=7/ECX=0 cpuid flags
CMPL SI, $7
@ -170,7 +165,6 @@ osavx:
CMPL AX, $6 // Check for OS support of XMM and YMM registers.
JE nocpuinfo
noavx:
MOVB $0, runtime·support_avx(SB)
MOVB $0, runtime·support_avx2(SB)
nocpuinfo:

6
src/runtime/asm_amd64p32.s
View File

@ -59,11 +59,6 @@ notintel:
TESTL $(1<<27), CX // OSXSAVE
SETNE runtime·support_osxsave(SB)
// If OS support for XMM and YMM is not present
// support_avx will be set back to false later.
TESTL $(1<<28), CX // AVX
SETNE runtime·support_avx(SB)
eax7:
// Load EAX=7/ECX=0 cpuid flags
CMPL SI, $7
@ -94,7 +89,6 @@ osavx:
JE nocpuinfo
#endif
noavx:
MOVB $0, runtime·support_avx(SB)
MOVB $0, runtime·support_avx2(SB)
nocpuinfo:

4
src/runtime/cpuflags_amd64.go
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@ -4,6 +4,8 @@
package runtime
import "internal/cpu"
var useAVXmemmove bool
func init() {
@ -16,5 +18,5 @@ func init() {
processor == 0x306A0 ||
processor == 0x306E0
useAVXmemmove = support_avx && !isIntelBridgeFamily
useAVXmemmove = cpu.X86.HasAVX && !isIntelBridgeFamily
}

1
src/runtime/runtime2.go
View File

@ -771,7 +771,6 @@ var (
processorVersionInfo uint32
isIntel bool
lfenceBeforeRdtsc bool
support_avx bool
support_avx2 bool
support_erms bool
support_osxsave bool