Zephyr API Documentation 4.0.0-rc2
A Scalable Open Source RTOS
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math_extras.h
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1/*
2 * Copyright (c) 2019 Facebook.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
19#ifndef ZEPHYR_INCLUDE_SYS_MATH_EXTRAS_H_
20#define ZEPHYR_INCLUDE_SYS_MATH_EXTRAS_H_
21
22#include <zephyr/types.h>
23#include <stdbool.h>
24#include <stddef.h>
25
41static bool u16_add_overflow(uint16_t a, uint16_t b, uint16_t *result);
42
51static bool u32_add_overflow(uint32_t a, uint32_t b, uint32_t *result);
52
60static bool u64_add_overflow(uint64_t a, uint64_t b, uint64_t *result);
61
69static bool size_add_overflow(size_t a, size_t b, size_t *result);
70
88static bool u16_mul_overflow(uint16_t a, uint16_t b, uint16_t *result);
89
98static bool u32_mul_overflow(uint32_t a, uint32_t b, uint32_t *result);
106static bool u64_mul_overflow(uint64_t a, uint64_t b, uint64_t *result);
107
115static bool size_mul_overflow(size_t a, size_t b, size_t *result);
116
132static int u32_count_leading_zeros(uint32_t x);
133
139static int u64_count_leading_zeros(uint64_t x);
140
156static int u32_count_trailing_zeros(uint32_t x);
157
163static int u64_count_trailing_zeros(uint64_t x);
164
169#include <zephyr/sys/math_extras_impl.h>
170
171#endif /* ZEPHYR_INCLUDE_SYS_MATH_EXTRAS_H_ */
u16_mul_overflow
static bool u16_mul_overflow(uint16_t a, uint16_t b, uint16_t *result)
Multiply two unsigned 16-bit integers.
u64_count_trailing_zeros
static int u64_count_trailing_zeros(uint64_t x)
Count the number of trailing zero bits in a 64-bit integer.
u64_mul_overflow
static bool u64_mul_overflow(uint64_t a, uint64_t b, uint64_t *result)
Multiply two unsigned 64-bit integers.
u32_add_overflow
static bool u32_add_overflow(uint32_t a, uint32_t b, uint32_t *result)
Add two unsigned 32-bit integers.
u32_mul_overflow
static bool u32_mul_overflow(uint32_t a, uint32_t b, uint32_t *result)
Multiply two unsigned 32-bit integers.
u32_count_trailing_zeros
static int u32_count_trailing_zeros(uint32_t x)
Count the number of trailing zero bits in a 32-bit integer.
u16_add_overflow
static bool u16_add_overflow(uint16_t a, uint16_t b, uint16_t *result)
Add two unsigned 16-bit integers.
size_mul_overflow
static bool size_mul_overflow(size_t a, size_t b, size_t *result)
Multiply two size_t integers.
size_add_overflow
static bool size_add_overflow(size_t a, size_t b, size_t *result)
Add two size_t integers.
u32_count_leading_zeros
static int u32_count_leading_zeros(uint32_t x)
Count the number of leading zero bits in a 32-bit integer.
u64_count_leading_zeros
static int u64_count_leading_zeros(uint64_t x)
Count the number of leading zero bits in a 64-bit integer.
u64_add_overflow
static bool u64_add_overflow(uint64_t a, uint64_t b, uint64_t *result)
Add two unsigned 64-bit integers.
math_extras_impl.h
Inline implementation of functions declared in math_extras.h.
uint32_t
__UINT32_TYPE__ uint32_t
Definition stdint.h:90
uint64_t
__UINT64_TYPE__ uint64_t
Definition stdint.h:91
uint16_t
__UINT16_TYPE__ uint16_t
Definition stdint.h:89