Merge branch 'i2c/for-4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / include / linux / bcd.h
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 */