math_extras.h

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/*
 * Copyright (c) 2019 Facebook.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_SYS_MATH_EXTRAS_H_
#define ZEPHYR_INCLUDE_SYS_MATH_EXTRAS_H_
 
#include <zephyr/types.h>
#include <stdbool.h>
#include <stddef.h>


static bool u16_add_overflow(uint16_t a, uint16_t b, uint16_t *result);

 
static bool u32_add_overflow(uint32_t a, uint32_t b, uint32_t *result);

static bool u64_add_overflow(uint64_t a, uint64_t b, uint64_t *result);

static bool size_add_overflow(size_t a, size_t b, size_t *result);



static bool u16_mul_overflow(uint16_t a, uint16_t b, uint16_t *result);

 
static bool u32_mul_overflow(uint32_t a, uint32_t b, uint32_t *result);
static bool u64_mul_overflow(uint64_t a, uint64_t b, uint64_t *result);

static bool size_mul_overflow(size_t a, size_t b, size_t *result);



static int u32_count_leading_zeros(uint32_t x);

static int u64_count_leading_zeros(uint64_t x);



static int u32_count_trailing_zeros(uint32_t x);

static int u64_count_trailing_zeros(uint64_t x);



typedef struct {
        uint64_t low;
        uint64_t high;
} int128_t;

static void i128_multiply_i64_i64(int64_t a, int64_t b, int128_t *result);


 
#include <zephyr/sys/math_extras_impl.h>
 
#endif /* ZEPHYR_INCLUDE_SYS_MATH_EXTRAS_H_ */