| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _BCD_H |
| 2 | #define _BCD_H |
| 3 | |
| David Brownell | d3de851 | 2008-07-23 21:30:37 -0700 | [diff] [blame] | 4 | #include <linux/compiler.h> |
| 5 | |
| Sebastian Andrzej Siewior | b53d657 | 2012-09-07 14:31:45 +0200 | [diff] [blame] | 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 | |
| 19 | unsigned _bcd2bin(unsigned char val) __attribute_const__; |
| 20 | unsigned char _bin2bcd(unsigned val) __attribute_const__; |
| David Brownell | d3de851 | 2008-07-23 21:30:37 -0700 | [diff] [blame] | 21 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #endif /* _BCD_H */ |