_HWCAP_VX = 1 << 11 // vector facility
)

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

func osArchInit() {}

func checkS390xCPU() {
	// Check if the present z-system has the hardware capability to carryout
	// floating point operations. Check if hwcap reflects CPU capability for the
	// necessary floating point hardware (HasVX) availability.

	ARM64.HasFPHP = isSet(hwCap, hwcap_FPHP)
	ARM64.HasASIMDHP = isSet(hwCap, hwcap_ASIMDHP)
	ARM64.HasCPUID = isSet(hwCap, hwcap_CPUID)
	ARM64.HasASIMDRDM = isSet(hwCap, hwcap_ASIMDRDM)
	ARM64.HasJSCVT = isSet(hwCap, hwcap_JSCVT)
	ARM64.HasFCMA = isSet(hwCap, hwcap_FCMA)
	ARM64.HasLRCPC = isSet(hwCap, hwcap_LRCPC)
	ARM64.HasDCPOP = isSet(hwCap, hwcap_DCPOP)
	ARM64.HasSHA3 = isSet(hwCap, hwcap_SHA3)
	ARM64.HasSM3 = isSet(hwCap, hwcap_SM3)

)

func hwcapInit(os string) {
	// HWCap was populated by the runtime from the auxiliary vector.
	// Use HWCap information since reading aarch64 system registers
	// is not supported in user space on older linux kernels.
	ARM64.HasAES = isSet(HWCap, hwcap_AES)
	ARM64.HasPMULL = isSet(HWCap, hwcap_PMULL)
	ARM64.HasSHA1 = isSet(HWCap, hwcap_SHA1)
	ARM64.HasSHA2 = isSet(HWCap, hwcap_SHA2)
	ARM64.HasCRC32 = isSet(HWCap, hwcap_CRC32)

	_AT_HWCAP2 = 26

	procAuxv = "/proc/self/auxv"

	uintSize = int(32 << (^uint(0) >> 63))
)

// For those platforms don't have a 'cpuid' equivalent we use HWCAP/HWCAP2
// These are initialized in cpu_$GOARCH.go
// and should not be changed after they are initialized.
var hwCap uint
var hwCap2 uint

func readHWCAP() error {
	// For Go 1.21+, get auxv from the Go runtime.
	if a := getAuxv(); len(a) > 0 {
		for len(a) >= 2 {

)

func vdsoCall()

func checkgoarm() {
	// On Android, /proc/self/auxv might be unreadable and hwcap won't
	// reflect the CPU capabilities. Assume that every Android arm device
	// has the necessary floating point hardware available.
	if GOOS == "android" {
		return
	}
	if cpu.HWCap&_HWCAP_VFP == 0 && goarmsoftfp == 0 {
		print("runtime: this CPU has no floating point hardware, so it cannot run\n")

		{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.