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 */ 24