1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _BCD_H
3#define _BCD_H
4
5#include <linux/compiler.h>
6
7#define bcd2bin(x) \
8 (__builtin_constant_p((u8 )(x)) ? \
9 const_bcd2bin(x) : \
10 _bcd2bin(x))
11
12#define bin2bcd(x) \
13 (__builtin_constant_p((u8 )(x)) ? \
14 const_bin2bcd(x) : \
15 _bin2bcd(x))
16
17#define bcd_is_valid(x) \
18 const_bcd_is_valid(x)
19
20#define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10)
21#define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10)
22#define const_bcd_is_valid(x) (((x) & 0x0f) < 10 && ((x) >> 4) < 10)
23
24unsigned _bcd2bin(unsigned char val) __attribute_const__;
25unsigned char _bin2bcd(unsigned val) __attribute_const__;
26
27#endif /* _BCD_H */
28