//go:build armbe || arm64be || m68k || mips || mips64 || mips64p32 || ppc || ppc64 || s390 || s390x || shbe || sparc || sparc64

package cpu

// IsBigEndian records whether the GOARCH's byte order is big endian.

//go:build 386 || amd64 || amd64p32 || alpha || arm || arm64 || loong64 || mipsle || mips64le || mips64p32le || nios2 || ppc64le || riscv || riscv64 || sh || wasm

package cpu

// IsBigEndian records whether the GOARCH's byte order is big endian.

//
//go:build 386 || amd64 || amd64p32 || alpha || arm || arm64 || loong64 || mipsle || mips64le || mips64p32le || nios2 || ppc64le || riscv || riscv64 || sh

package unix

func xorIn(d *state, buf []byte) {
	if cpu.IsBigEndian {
		for i := 0; len(buf) >= 8; i++ {
			a := binary.LittleEndian.Uint64(buf)
			d.a[i] ^= a
			buf = buf[8:]
		}
	} else {
		ab := (*[25 * 64 / 8]byte)(unsafe.Pointer(&d.a))
		subtle.XORBytes(ab[:], ab[:], buf)
	}
}

// copyOut copies uint64s to a byte buffer.
func copyOut(d *state, b []byte) {
	if cpu.IsBigEndian {
		for i := 0; len(b) >= 8; i++ {

	for i := int64(0); i < n; i++ {
		if r[i].shift != shift0+i*size*8 {
			isLittleEndian = false
			break
		}
	}
	isBigEndian := true
	for i := int64(0); i < n; i++ {
		if r[i].shift != shift0-i*size*8 {
			isBigEndian = false
			break
		}
	}
	if !isLittleEndian && !isBigEndian {
		return false
	}

	// Find a place to put the new load.
	// This is tricky, because it has to be at a point where

// license that can be found in the LICENSE file.
//
//go:build armbe || arm64be || m68k || mips || mips64 || mips64p32 || ppc || ppc64 || s390 || s390x || shbe || sparc || sparc64

package unix

import "unsafe"

// readInt returns the size-bytes unsigned integer in native byte order at offset off.
func readInt(b []byte, off, size uintptr) (u uint64, ok bool) {
	if len(b) < int(off+size) {
		return 0, false
	}
	if isBigEndian {
		return readIntBE(b[off:], size), true
	}
	return readIntLE(b[off:], size), true
}

func readIntBE(b []byte, size uintptr) uint64 {
	switch size {
	case 1:
		return uint64(b[0])
	case 2:

}

func (t *Target) mustSetHeadType() {
	if t.HeadType == objabi.Hunknown {
		panic("HeadType is not set")
	}
}

//
// MISC
//

func (t *Target) IsBigEndian() bool {
	return t.Arch.ByteOrder == binary.BigEndian
}

func (t *Target) UsesLibc() bool {
	t.mustSetHeadType()
	switch t.HeadType {

			if target.IsDarwin() && xadd != 0 {
				nExtReloc = 4 // need another two relocations for non-zero addend
			}

			if target.IsWindows() {
				var o0, o1 uint32
				if target.IsBigEndian() {
					o0 = uint32(val >> 32)
					o1 = uint32(val)
				} else {
					o0 = uint32(val)
					o1 = uint32(val >> 32)
				}

				// The first instruction (ADRP) has a 21-bit immediate field,

func unpackInstPair(target *ld.Target, r int64) (uint32, uint32) {
	if target.IsBigEndian() {
		return uint32(r >> 32), uint32(r)
	}
	return uint32(r), uint32(r >> 32)
}

// Pack a pair of 32 bit instruction words o1, o2 into 64 bit relocation
// in endian order.
func packInstPair(target *ld.Target, o1, o2 uint32) int64 {
	if target.IsBigEndian() {
		return (int64(o1) << 32) | int64(o2)
	}