tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _BCD_H
2#define _BCD_H
3
4#include <linux/compiler.h>
5
6#define bcd2bin(x) \
7 (__builtin_constant_p((u8 )(x)) ? \
8 const_bcd2bin(x) : \
9 _bcd2bin(x))
10
11#define bin2bcd(x) \
12 (__builtin_constant_p((u8 )(x)) ? \
13 const_bin2bcd(x) : \
14 _bin2bcd(x))
15
16#define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10)
17#define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10)
18
19unsigned _bcd2bin(unsigned char val) __attribute_const__;
20unsigned char _bin2bcd(unsigned val) __attribute_const__;
21
22#endif /* _BCD_H */