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Current Path: /opt/golang/1.22.0/src/internal/cpu

opt / golang / 1.22.0 / src / internal / cpu /

📁 ..
📄 cpu.go(6.85 KB)
📄 cpu.s(276 B)
📄 cpu_arm.go(1.26 KB)
📄 cpu_arm64.go(1.64 KB)
📄 cpu_arm64.s(439 B)
📄 cpu_arm64_android.go(231 B)
📄 cpu_arm64_darwin.go(1014 B)
📄 cpu_arm64_freebsd.go(322 B)
📄 cpu_arm64_hwcap.go(2.15 KB)
📄 cpu_arm64_linux.go(250 B)
📄 cpu_arm64_openbsd.go(574 B)
📄 cpu_arm64_other.go(466 B)
📄 cpu_loong64.go(398 B)
📄 cpu_mips.go(220 B)
📄 cpu_mips64x.go(671 B)
📄 cpu_mipsle.go(220 B)
📄 cpu_no_name.go(620 B)
📄 cpu_ppc64x.go(651 B)
📄 cpu_ppc64x_aix.go(603 B)
📄 cpu_ppc64x_linux.go(885 B)
📄 cpu_ppc64x_other.go(423 B)
📄 cpu_riscv64.go(220 B)
📄 cpu_s390x.go(5.88 KB)
📄 cpu_s390x.s(2.2 KB)
📄 cpu_s390x_test.go(1.43 KB)
📄 cpu_test.go(1.4 KB)
📄 cpu_wasm.go(220 B)
📄 cpu_x86.go(5.81 KB)
📄 cpu_x86.s(831 B)
📄 cpu_x86_test.go(1.37 KB)
📄 export_test.go(200 B)
📄 export_x86_test.go(241 B)

Editing: cpu_arm64_darwin.go

// Copyright 2020 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.

//go:build arm64 && darwin && !ios

package cpu

func osInit() {
	ARM64.HasATOMICS = sysctlEnabled([]byte("hw.optional.armv8_1_atomics\x00"))
	ARM64.HasCRC32 = sysctlEnabled([]byte("hw.optional.armv8_crc32\x00"))
	ARM64.HasSHA512 = sysctlEnabled([]byte("hw.optional.armv8_2_sha512\x00"))

// There are no hw.optional sysctl values for the below features on Mac OS 11.0
	// to detect their supported state dynamically. Assume the CPU features that
	// Apple Silicon M1 supports to be available as a minimal set of features
	// to all Go programs running on darwin/arm64.
	ARM64.HasAES = true
	ARM64.HasPMULL = true
	ARM64.HasSHA1 = true
	ARM64.HasSHA2 = true
}

//go:noescape
func getsysctlbyname(name []byte) (int32, int32)

func sysctlEnabled(name []byte) bool {
	ret, value := getsysctlbyname(name)
	if ret < 0 {
		return false
	}
	return value > 0
}

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Editing: cpu_arm64_darwin.go

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