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| 1 | //===-- Memmove implementation ----------------------------------*- C++ -*-===// |
|---|---|
| 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_MEMMOVE_H |
| 10 | #define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_MEMMOVE_H |
| 11 | |
| 12 | #include "src/__support/macros/attributes.h" // LIBC_INLINE |
| 13 | #include "src/__support/macros/config.h" // LIBC_NAMESPACE_DECL |
| 14 | #include <stddef.h> // size_t, ptrdiff_t |
| 15 | |
| 16 | #if defined(LIBC_TARGET_ARCH_IS_X86) |
| 17 | #include "src/string/memory_utils/x86_64/inline_memmove.h" |
| 18 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_SMALL_SIZE \ |
| 19 | inline_memmove_small_size_x86 |
| 20 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_FOLLOW_UP \ |
| 21 | inline_memmove_follow_up_x86 |
| 22 | #elif defined(LIBC_TARGET_ARCH_IS_AARCH64) |
| 23 | #include "src/string/memory_utils/aarch64/inline_memmove.h" |
| 24 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_SMALL_SIZE \ |
| 25 | inline_memmove_no_small_size |
| 26 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_FOLLOW_UP inline_memmove_aarch64 |
| 27 | #elif defined(LIBC_TARGET_ARCH_IS_ANY_RISCV) |
| 28 | #include "src/string/memory_utils/riscv/inline_memmove.h" |
| 29 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_SMALL_SIZE \ |
| 30 | inline_memmove_no_small_size |
| 31 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_FOLLOW_UP inline_memmove_riscv |
| 32 | #elif defined(LIBC_TARGET_ARCH_IS_GPU) |
| 33 | #include "src/string/memory_utils/generic/builtin.h" |
| 34 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_SMALL_SIZE \ |
| 35 | inline_memmove_no_small_size |
| 36 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_FOLLOW_UP inline_memmove_builtin |
| 37 | #else |
| 38 | #include "src/string/memory_utils/generic/byte_per_byte.h" |
| 39 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_SMALL_SIZE \ |
| 40 | inline_memmove_no_small_size |
| 41 | #define LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_FOLLOW_UP \ |
| 42 | inline_memmove_byte_per_byte |
| 43 | #endif |
| 44 | |
| 45 | namespace LIBC_NAMESPACE_DECL { |
| 46 | |
| 47 | LIBC_INLINE constexpr bool inline_memmove_no_small_size(void *, const void *, |
| 48 | size_t) { |
| 49 | return false; |
| 50 | } |
| 51 | |
| 52 | [[gnu::flatten]] LIBC_INLINE bool |
| 53 | inline_memmove_small_size(void *dst, const void *src, size_t count) { |
| 54 | return LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_SMALL_SIZE( |
| 55 | reinterpret_cast<Ptr>(dst), reinterpret_cast<CPtr>(src), count); |
| 56 | } |
| 57 | |
| 58 | [[gnu::flatten]] LIBC_INLINE void |
| 59 | inline_memmove_follow_up(void *dst, const void *src, size_t count) { |
| 60 | LIBC_SRC_STRING_MEMORY_UTILS_MEMMOVE_FOLLOW_UP( |
| 61 | reinterpret_cast<Ptr>(dst), reinterpret_cast<CPtr>(src), count); |
| 62 | } |
| 63 | |
| 64 | LIBC_INLINE void inline_memmove(void *dst, const void *src, size_t count) { |
| 65 | if (inline_memmove_small_size(dst, src, count)) |
| 66 | return; |
| 67 | inline_memmove_follow_up(dst, src, count); |
| 68 | } |
| 69 | |
| 70 | } // namespace LIBC_NAMESPACE_DECL |
| 71 | |
| 72 | #endif /* LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_MEMMOVE_H */ |
| 73 |
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