diff options
Diffstat (limited to 'include/linux/bcd.h')
| -rw-r--r-- | include/linux/bcd.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/include/linux/bcd.h b/include/linux/bcd.h index 22ea563ba3e..18fff11fb3e 100644 --- a/include/linux/bcd.h +++ b/include/linux/bcd.h @@ -3,7 +3,20 @@ #include <linux/compiler.h> -unsigned bcd2bin(unsigned char val) __attribute_const__; -unsigned char bin2bcd(unsigned val) __attribute_const__; +#define bcd2bin(x) \ + (__builtin_constant_p((u8 )(x)) ? \ + const_bcd2bin(x) : \ + _bcd2bin(x)) + +#define bin2bcd(x) \ + (__builtin_constant_p((u8 )(x)) ? \ + const_bin2bcd(x) : \ + _bin2bcd(x)) + +#define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10) +#define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10) + +unsigned _bcd2bin(unsigned char val) __attribute_const__; +unsigned char _bin2bcd(unsigned val) __attribute_const__; #endif /* _BCD_H */ |