| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |