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cpu: use IsProcessorFeaturePresent to calculate ARM64 on windows

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This CL started as revert of CL 757482.

Fixes golang/go#76791

Change-Id: Iaa78c73a6dde8d735e74e2c57c86375ccd5902c7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/758960
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Alex Brainman
2026-04-13 18:36:34 -07:00
parent df7d5d7b60
commit 54fe89f841
4 changed files with 113 additions and 1 deletions
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cpu/cpu_windows.go
+26
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@@ -0,0 +1,26 @@
// Copyright 2026 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cpu
//go:generate go run golang.org/x/sys/windows/mkwinsyscall -systemdll=false -output zcpu_windows.go cpu_windows.go
//sys isProcessorFeaturePresent(ProcessorFeature uint32) (ret bool) = kernel32.IsProcessorFeaturePresent
// The processor features to be tested for IsProcessorFeaturePresent, see
// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-isprocessorfeaturepresent
const (
_PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE = 30
_PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE = 31
_PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE = 34
_PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE = 43
_PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE = 44
_PF_ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE = 45
_PF_ARM_SVE_INSTRUCTIONS_AVAILABLE = 46
_PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE = 47
_PF_ARM_SHA3_INSTRUCTIONS_AVAILABLE = 64
_PF_ARM_SHA512_INSTRUCTIONS_AVAILABLE = 65
)