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 19 unsigned _bcd2bin(unsigned char val) __attribute_const__; 20 unsigned char _bin2bcd(unsigned val) __attribute_const__; 21 22 #endif /* _BCD_H */ 23