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| 1 | //===-- Memcpy implementation for aarch64 -----------------------*- 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 | #ifndef LLVM_LIBC_SRC_STRING_MEMORY_UTILS_AARCH64_INLINE_MEMCPY_H |
| 9 | #define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_AARCH64_INLINE_MEMCPY_H |
| 10 | |
| 11 | #include "src/__support/macros/attributes.h" // LIBC_INLINE |
| 12 | #include "src/string/memory_utils/op_builtin.h" |
| 13 | #include "src/string/memory_utils/utils.h" |
| 14 | |
| 15 | #include <stddef.h> // size_t |
| 16 | |
| 17 | namespace LIBC_NAMESPACE_DECL { |
| 18 | |
| 19 | [[maybe_unused]] LIBC_INLINE void |
| 20 | inline_memcpy_aarch64(Ptr __restrict dst, CPtr __restrict src, size_t count) { |
| 21 | if (count == 0) |
| 22 | return; |
| 23 | if (count == 1) |
| 24 | return builtin::Memcpy<1>::block(dst, src); |
| 25 | if (count == 2) |
| 26 | return builtin::Memcpy<2>::block(dst, src); |
| 27 | if (count == 3) |
| 28 | return builtin::Memcpy<3>::block(dst, src); |
| 29 | if (count == 4) |
| 30 | return builtin::Memcpy<4>::block(dst, src); |
| 31 | if (count < 8) |
| 32 | return builtin::Memcpy<4>::head_tail(dst, src, count); |
| 33 | if (count < 16) |
| 34 | return builtin::Memcpy<8>::head_tail(dst, src, count); |
| 35 | if (count < 32) |
| 36 | return builtin::Memcpy<16>::head_tail(dst, src, count); |
| 37 | if (count < 64) |
| 38 | return builtin::Memcpy<32>::head_tail(dst, src, count); |
| 39 | if (count < 128) |
| 40 | return builtin::Memcpy<64>::head_tail(dst, src, count); |
| 41 | builtin::Memcpy<16>::block(dst, src); |
| 42 | align_to_next_boundary<16, Arg::Src>(dst, src, count); |
| 43 | return builtin::Memcpy<64>::loop_and_tail(dst, src, count); |
| 44 | } |
| 45 | |
| 46 | } // namespace LIBC_NAMESPACE_DECL |
| 47 | |
| 48 | #endif // LLVM_LIBC_SRC_STRING_MEMORY_UTILS_AARCH64_INLINE_MEMCPY_H |
| 49 |
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