ffs.h File Reference

#include <zephyr/types.h>

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Functions
static ALWAYS_INLINE unsigned int	find_msb_set (uint32_t op)
	find most significant bit set in a 32-bit word More...
static ALWAYS_INLINE unsigned int	find_lsb_set (uint32_t op)
	find least significant bit set in a 32-bit word More...

Function Documentation

find_lsb_set()

static ALWAYS_INLINE unsigned int find_lsb_set ( uint32_t  op )

static

find least significant bit set in a 32-bit word

This routine finds the first bit set starting from the least significant bit in the argument passed in and returns the index of that bit. Bits are numbered starting at 1 from the least significant bit. A return value of zero indicates that the value passed is zero.

Returns

least significant bit set, 0 if op is 0

find_msb_set()

static ALWAYS_INLINE unsigned int find_msb_set ( uint32_t  op )

static

find most significant bit set in a 32-bit word

This routine finds the first bit set starting from the most significant bit in the argument passed in and returns the index of that bit. Bits are numbered starting at 1 from the least significant bit. A return value of zero indicates that the value passed is zero.

Returns

most significant bit set, 0 if op is 0