// 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 aix && ppc64

// +build aix,ppc64

// Functions to access/create device major and minor numbers matching the

// encoding used AIX.

package unix

// Major returns the major component of a Linux device number.

func Major(dev uint64) uint32 {

	return uint32((dev & 0x3fffffff00000000) >> 32)

}

// Minor returns the minor component of a Linux device number.

func Minor(dev uint64) uint32 {

	return uint32((dev & 0x00000000ffffffff) >> 0)

}

// Mkdev returns a Linux device number generated from the given major and minor

// components.

func Mkdev(major, minor uint32) uint64 {

	var DEVNO64 uint64

	DEVNO64 = 0x8000000000000000

	return ((uint64(major) << 32) | (uint64(minor) & 0x00000000FFFFFFFF) | DEVNO64)

}