mirror of
https://github.com/rwinkhart/sys.git
synced 2026-08-28 12:56:32 -04:00
Alex Brainman
54fe89f841
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>
39 lines
1.5 KiB
Go
39 lines
1.5 KiB
Go
// Copyright 2026 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cpu
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func doinit() {
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// set HasASIMD and HasFP to true as per
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// https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170#base-requirements
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//
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// The ARM64 version of Windows always presupposes that it's running on an ARMv8 or later architecture.
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// Both floating-point and NEON support are presumed to be present in hardware.
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//
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ARM64.HasASIMD = true
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ARM64.HasFP = true
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if isProcessorFeaturePresent(_PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) {
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ARM64.HasAES = true
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ARM64.HasPMULL = true
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ARM64.HasSHA1 = true
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ARM64.HasSHA2 = true
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}
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ARM64.HasSHA3 = isProcessorFeaturePresent(_PF_ARM_SHA3_INSTRUCTIONS_AVAILABLE)
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ARM64.HasCRC32 = isProcessorFeaturePresent(_PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE)
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ARM64.HasSHA512 = isProcessorFeaturePresent(_PF_ARM_SHA512_INSTRUCTIONS_AVAILABLE)
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ARM64.HasATOMICS = isProcessorFeaturePresent(_PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE)
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if isProcessorFeaturePresent(_PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE) {
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ARM64.HasASIMDDP = true
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ARM64.HasASIMDRDM = true
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}
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if isProcessorFeaturePresent(_PF_ARM_V83_LRCPC_INSTRUCTIONS_AVAILABLE) {
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ARM64.HasLRCPC = true
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ARM64.HasSM3 = true
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}
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ARM64.HasSVE = isProcessorFeaturePresent(_PF_ARM_SVE_INSTRUCTIONS_AVAILABLE)
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ARM64.HasSVE2 = isProcessorFeaturePresent(_PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE)
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ARM64.HasJSCVT = isProcessorFeaturePresent(_PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE)
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}
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