frv: define __fls (ee38e514) · Commits · 戴 / test

include/asm-frv/bitops.h

+13 −0

Original line number	Diff line number	Diff line
		@@ -339,6 +339,19 @@ int __ffs(unsigned long x)
		return 31 - bit;
		}

		/**
		* __fls - find last (most-significant) set bit in a long word
		* @word: the word to search
		*
		* Undefined if no set bit exists, so code should check against 0 first.
		*/
		static inline unsigned long __fls(unsigned long word)
		{
		unsigned long bit;
		asm("scan %1,gr0,%0" : "=r"(bit) : "r"(word));
		return bit;
		}

		/*
		* special slimline version of fls() for calculating ilog2_u32()
		* - note: no protection against n == 0