//go:build purego || !amd64
// +build purego !amd64
package bswap
import "encoding/binary"
func swap64(b []byte) {
for i := 0; i < len(b); i += 8 {
u := binary.BigEndian.Uint64(b[i:])
binary.LittleEndian.PutUint64(b[i:], u)
}