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 const_bcd2bin(x)	(((x) & 0x0f) + ((x) >> 4) * 10)
18 #define const_bin2bcd(x)	((((x) / 10) << 4) + (x) % 10)
19 
20 unsigned _bcd2bin(unsigned char val) __attribute_const__;
21 unsigned char _bin2bcd(unsigned val) __attribute_const__;
22 
23 #endif /* _BCD_H */
24