mirror of
https://github.com/rwinkhart/sys.git
synced 2026-08-28 04:46:44 -04:00
Alex Brainman
fc646e489f
For golang/go#76791 Change-Id: I9500b38b17b5e3e141df8770d82c725c2ba8fd65 Cq-Include-Trybots: luci.golang.try:x_sys-gotip-windows-arm64 Reviewed-on: https://go-review.googlesource.com/c/sys/+/740880 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Michael Pratt <mpratt@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
43 lines
1.7 KiB
Go
43 lines
1.7 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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import (
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"golang.org/x/sys/windows"
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)
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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 windows.IsProcessorFeaturePresent(windows.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 = windows.IsProcessorFeaturePresent(windows.PF_ARM_SHA3_INSTRUCTIONS_AVAILABLE)
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ARM64.HasCRC32 = windows.IsProcessorFeaturePresent(windows.PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE)
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ARM64.HasSHA512 = windows.IsProcessorFeaturePresent(windows.PF_ARM_SHA512_INSTRUCTIONS_AVAILABLE)
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ARM64.HasATOMICS = windows.IsProcessorFeaturePresent(windows.PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE)
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if windows.IsProcessorFeaturePresent(windows.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 windows.IsProcessorFeaturePresent(windows.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 = windows.IsProcessorFeaturePresent(windows.PF_ARM_SVE_INSTRUCTIONS_AVAILABLE)
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ARM64.HasSVE2 = windows.IsProcessorFeaturePresent(windows.PF_ARM_SVE2_INSTRUCTIONS_AVAILABLE)
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ARM64.HasJSCVT = windows.IsProcessorFeaturePresent(windows.PF_ARM_V83_JSCVT_INSTRUCTIONS_AVAILABLE)
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}
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