1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef _LINUX_WORDPART_H
4#define _LINUX_WORDPART_H
5
6/**
7 * upper_32_bits - return bits 32-63 of a number
8 * @n: the number we're accessing
9 *
10 * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
11 * the "right shift count >= width of type" warning when that quantity is
12 * 32-bits.
13 */
14#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
15
16/**
17 * lower_32_bits - return bits 0-31 of a number
18 * @n: the number we're accessing
19 */
20#define lower_32_bits(n) ((u32)((n) & 0xffffffff))
21
22/**
23 * upper_16_bits - return bits 16-31 of a number
24 * @n: the number we're accessing
25 */
26#define upper_16_bits(n) ((u16)((n) >> 16))
27
28/**
29 * lower_16_bits - return bits 0-15 of a number
30 * @n: the number we're accessing
31 */
32#define lower_16_bits(n) ((u16)((n) & 0xffff))
33
34/**
35 * REPEAT_BYTE - repeat the value @x multiple times as an unsigned long value
36 * @x: value to repeat
37 *
38 * NOTE: @x is not checked for > 0xff; larger values produce odd results.
39 */
40#define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))
41
42#endif // _LINUX_WORDPART_H
43