1//===-- Implementation of memcmp ------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_MEMCMP_H
10#define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_MEMCMP_H
11
12#include "src/__support/macros/config.h" // LIBC_INLINE
13#include "src/__support/macros/properties/architectures.h" // LIBC_TARGET_ARCH_IS_
14#include "src/string/memory_utils/utils.h" // Ptr, CPtr
15
16#include <stddef.h> // size_t
17
18#if defined(LIBC_TARGET_ARCH_IS_X86)
19#include "src/string/memory_utils/x86_64/inline_memcmp.h"
20#define LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP inline_memcmp_x86
21#elif defined(LIBC_TARGET_ARCH_IS_AARCH64)
22#include "src/string/memory_utils/aarch64/inline_memcmp.h"
23#define LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP inline_memcmp_aarch64
24#elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
25#include "src/string/memory_utils/riscv/inline_memcmp.h"
26#define LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP inline_memcmp_riscv
27#elif defined(LIBC_TARGET_ARCH_IS_ARM) || defined(LIBC_TARGET_ARCH_IS_GPU)
28#include "src/string/memory_utils/generic/byte_per_byte.h"
29#define LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP inline_memcmp_byte_per_byte
30#else
31#error "Unsupported architecture"
32#endif
33
34namespace LIBC_NAMESPACE {
35
36[[gnu::flatten]] LIBC_INLINE int inline_memcmp(const void *p1, const void *p2,
37 size_t count) {
38 return static_cast<int>(LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP(
39 p1: reinterpret_cast<CPtr>(p1), p2: reinterpret_cast<CPtr>(p2), count));
40}
41
42} // namespace LIBC_NAMESPACE
43
44#undef LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP
45
46#endif // LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_MEMCMP_H
47

source code of libc/src/string/memory_utils/inline_memcmp.h