Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5ece5c51 authored by Rusty Russell's avatar Rusty Russell
Browse files

xtensa: define __fls 



Like fls, but can't be handed 0 and returns the bit number.

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 5c134dad

include/asm-xtensa/bitops.h

+11 −0
Original line number Diff line number Diff line
@@ -82,6 +82,16 @@ static inline int fls (unsigned int x) 
	return 32 - __cntlz(x);

}



/**

 * __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)

{

	return 31 - __cntlz(word);

}

#else



/* Use the generic implementation if we don't have the nsa/nsau instructions. */
@@ -90,6 +100,7 @@ static inline int fls (unsigned int x) 
# include <asm-generic/bitops/__ffs.h>

# include <asm-generic/bitops/ffz.h>

# include <asm-generic/bitops/fls.h>

# include <asm-generic/bitops/__fls.h>



#endif