X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=include%2Flinux%2Fbcd.h;fp=include%2Flinux%2Fbcd.h;h=18fff11fb3eadbe6ebd715a584aa49909d1dd30f;hb=b53d657d84f530e5d83f34ff1b81ceedad3faa31;hp=22ea563ba3eb169f9e04aac1233b404923c42d6e;hpb=8a424bf40d772fedacc91862ecc86f10541fabb3;p=karo-tx-linux.git

diff --git a/include/linux/bcd.h b/include/linux/bcd.h
index 22ea563ba3eb..18fff11fb3ea 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 */