1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 21da177e4SLinus Torvalds #ifndef _BCD_H 31da177e4SLinus Torvalds #define _BCD_H 41da177e4SLinus Torvalds 5d3de851aSDavid Brownell #include <linux/compiler.h> 6d3de851aSDavid Brownell 7b53d657dSSebastian Andrzej Siewior #define bcd2bin(x) \ 8b53d657dSSebastian Andrzej Siewior (__builtin_constant_p((u8 )(x)) ? \ 9b53d657dSSebastian Andrzej Siewior const_bcd2bin(x) : \ 10b53d657dSSebastian Andrzej Siewior _bcd2bin(x)) 11b53d657dSSebastian Andrzej Siewior 12b53d657dSSebastian Andrzej Siewior #define bin2bcd(x) \ 13b53d657dSSebastian Andrzej Siewior (__builtin_constant_p((u8 )(x)) ? \ 14b53d657dSSebastian Andrzej Siewior const_bin2bcd(x) : \ 15b53d657dSSebastian Andrzej Siewior _bin2bcd(x)) 16b53d657dSSebastian Andrzej Siewior 17*19409796SAhmad Fatoum #define bcd_is_valid(x) \ 18*19409796SAhmad Fatoum const_bcd_is_valid(x) 19*19409796SAhmad Fatoum 20b53d657dSSebastian Andrzej Siewior #define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10) 21b53d657dSSebastian Andrzej Siewior #define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10) 22*19409796SAhmad Fatoum #define const_bcd_is_valid(x) (((x) & 0x0f) < 10 && ((x) >> 4) < 10) 23b53d657dSSebastian Andrzej Siewior 24b53d657dSSebastian Andrzej Siewior unsigned _bcd2bin(unsigned char val) __attribute_const__; 25b53d657dSSebastian Andrzej Siewior unsigned char _bin2bcd(unsigned val) __attribute_const__; 26d3de851aSDavid Brownell 271da177e4SLinus Torvalds #endif /* _BCD_H */ 28