math_extras.h File Reference

#include <zephyr/types.h>
#include <stdbool.h>
#include <stddef.h>
#include <zephyr/sys/math_extras_impl.h>

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Functions
Unsigned integer addition with overflow detection.
These functions compute a + b and store the result in *result, returning true if the operation overflowed.
static bool	u16_add_overflow (uint16_t a, uint16_t b, uint16_t *result)
	Add two unsigned 16-bit integers.
static bool	u32_add_overflow (uint32_t a, uint32_t b, uint32_t *result)
	Add two unsigned 32-bit integers.
static bool	u64_add_overflow (uint64_t a, uint64_t b, uint64_t *result)
	Add two unsigned 64-bit integers.
static bool	size_add_overflow (size_t a, size_t b, size_t *result)
	Add two size_t integers.
Unsigned integer multiplication with overflow detection.
These functions compute a * b and store the result in *result, returning true if the operation overflowed.
static bool	u16_mul_overflow (uint16_t a, uint16_t b, uint16_t *result)
	Multiply two unsigned 16-bit integers.
static bool	u32_mul_overflow (uint32_t a, uint32_t b, uint32_t *result)
	Multiply two unsigned 32-bit integers.
static bool	u64_mul_overflow (uint64_t a, uint64_t b, uint64_t *result)
	Multiply two unsigned 64-bit integers.
static bool	size_mul_overflow (size_t a, size_t b, size_t *result)
	Multiply two size_t integers.
Count leading zeros.
Count the number of leading zero bits in the bitwise representation of x. When x = 0, this is the size of x in bits.
static int	u32_count_leading_zeros (uint32_t x)
	Count the number of leading zero bits in a 32-bit integer.
static int	u64_count_leading_zeros (uint64_t x)
	Count the number of leading zero bits in a 64-bit integer.
Count trailing zeros.
Count the number of trailing zero bits in the bitwise representation of x. When x = 0, this is the size of x in bits.
static int	u32_count_trailing_zeros (uint32_t x)
	Count the number of trailing zero bits in a 32-bit integer.
static int	u64_count_trailing_zeros (uint64_t x)
	Count the number of trailing zero bits in a 64-bit integer.