{Name: "v7atomics", Feature: &ARM.HasV7Atomics},
	}

	// HWCAP feature bits
	ARM.HasVFPv4 = isSet(HWCap, hwcap_VFPv4)
	ARM.HasIDIVA = isSet(HWCap, hwcap_IDIVA)
	// lpae is required to make the 64-bit instructions LDRD and STRD (and variants) atomic.
	// See ARMv7 manual section B1.6.
	// We also need at least a v7 chip, for the DMB instruction.
	ARM.HasV7Atomics = isSet(HWCap, hwcap_LPAE) && isV7(Platform)
}

	_HWCAP_VFP   = 1 << 6
	_HWCAP_VFPv3 = 1 << 13
)

func checkgoarm() {
	if cpu.HWCap&_HWCAP_VFP == 0 && goarmsoftfp == 0 {
		print("runtime: this CPU has no floating point hardware, so it cannot run\n")
		print("a binary compiled for hard floating point. Recompile adding ,softfloat\n")
		print("to GOARM.\n")
		exit(1)
	}
	if goarm > 6 && cpu.HWCap&_HWCAP_VFPv3 == 0 && goarmsoftfp == 0 {

// license that can be found in the LICENSE file.

//go:build linux && (mips64 || mips64le)

package cpu

// HWCAP bits. These are exposed by the Linux kernel 5.4.
const (
	// CPU features
	hwcap_MIPS_MSA = 1 << 1
)

func doinit() {
	// HWCAP feature bits
	MIPS64X.HasMSA = isSet(hwCap, hwcap_MIPS_MSA)
}

func isSet(hwc uint, value uint) bool {
	return hwc&value != 0

// license that can be found in the LICENSE file.

//go:build linux && (mips64 || mips64le)

package runtime

import "internal/cpu"

func archauxv(tag, val uintptr) {
	switch tag {
	case _AT_HWCAP:
		cpu.HWCap = uint(val)
	}
}

func osArchInit() {}

//go:nosplit
func cputicks() int64 {
	// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
	return nanotime()
}

const (

// license that can be found in the LICENSE file.

//go:build (ppc64 || ppc64le) && !aix && !linux

package cpu

func osinit() {
	// Other operating systems do not support reading HWCap from auxiliary vector,
	// reading privileged system registers or sysctl in user space to detect CPU
	// features at runtime.

// license that can be found in the LICENSE file.

//go:build arm64

package runtime

import "internal/cpu"

func archauxv(tag, val uintptr) {
	switch tag {
	case _AT_HWCAP:
		cpu.HWCap = uint(val)
	}
}

func osArchInit() {}

//go:nosplit
func cputicks() int64 {
	// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
	return nanotime()

// license that can be found in the LICENSE file.

//go:build arm64 && !linux && !freebsd && !android && (!darwin || ios) && !openbsd

package cpu

func osInit() {
	// Other operating systems do not support reading HWCap from auxiliary vector,
	// reading privileged aarch64 system registers or sysctl in user space to detect
	// CPU features at runtime.

// Copyright 2017 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

const CacheLinePadSize = 256

var HWCap uint

// bitIsSet reports whether the bit at index is set. The bit index
// is in big endian order, so bit index 0 is the leftmost bit.
func bitIsSet(bits []uint64, index uint) bool {
	return bits[index/64]&((1<<63)>>(index%64)) != 0
}

// Copyright 2018 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 linux && (ppc64 || ppc64le)

package cpu

// HWCAP/HWCAP2 bits. These are exposed by the kernel.
const (
	// ISA Level
	_PPC_FEATURE2_ARCH_2_07 = 0x80000000
	_PPC_FEATURE2_ARCH_3_00 = 0x00800000

	// CPU features
	_PPC_FEATURE2_DARN = 0x00200000

// Copyright 2018 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

const cacheLineSize = 32

// HWCAP/HWCAP2 bits.
// These are specific to Linux.
const (
	hwcap_SWP       = 1 << 0
	hwcap_HALF      = 1 << 1
	hwcap_THUMB     = 1 << 2
	hwcap_26BIT     = 1 << 3
	hwcap_FAST_MULT = 1 << 4
	hwcap_FPA       = 1 << 5