048fa2df92
This patch implements ffs, __ffs, fls, __fls using __builtin_* gcc functions. These header files can be used by other architectures that rely on the gcc builtins. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
18 lines
371 B
C
18 lines
371 B
C
#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FFS_H_
|
|
#define _ASM_GENERIC_BITOPS_BUILTIN_FFS_H_
|
|
|
|
/**
|
|
* ffs - find first bit set
|
|
* @x: the word to search
|
|
*
|
|
* This is defined the same way as
|
|
* the libc and compiler builtin ffs routines, therefore
|
|
* differs in spirit from the above ffz (man ffs).
|
|
*/
|
|
static __always_inline int ffs(int x)
|
|
{
|
|
return __builtin_ffs(x);
|
|
}
|
|
|
|
#endif
|