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fix-tests
libc/src/string/memory_utils/memcmp_implementations.h
105 строк
4 KB
Michael Jones
[libc] apply new lint rules
07 дек 2021, 21:49
07 дек 2021, 21:49
1c92911
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//===-- Implementation of memcmp ------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef LLVM_LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP_IMPLEMENTATIONS_H #define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP_IMPLEMENTATIONS_H #include "src/__support/architectures.h" #include "src/__support/common.h" #include "src/string/memory_utils/elements.h" #include <stddef.h> // size_t namespace __llvm_libc { static inline int inline_memcmp(const char *lhs, const char *rhs, size_t count) { #if defined(LLVM_LIBC_ARCH_X86) ///////////////////////////////////////////////////////////////////////////// // LLVM_LIBC_ARCH_X86 ///////////////////////////////////////////////////////////////////////////// using namespace __llvm_libc::x86; if (count == 0) return 0; if (count == 1) return three_way_compare<_1>(lhs, rhs); if (count == 2) return three_way_compare<_2>(lhs, rhs); if (count == 3) return three_way_compare<_3>(lhs, rhs); if (count <= 8) return three_way_compare<HeadTail<_4>>(lhs, rhs, count); if (count <= 16) return three_way_compare<HeadTail<_8>>(lhs, rhs, count); if (count <= 32) return three_way_compare<HeadTail<_16>>(lhs, rhs, count); if (count <= 64) return three_way_compare<HeadTail<_32>>(lhs, rhs, count); if (count <= 128) return three_way_compare<HeadTail<_64>>(lhs, rhs, count); return three_way_compare<Align<_32>::Then<Loop<_32>>>(lhs, rhs, count); #elif defined(LLVM_LIBC_ARCH_AARCH64) ///////////////////////////////////////////////////////////////////////////// // LLVM_LIBC_ARCH_AARCH64 ///////////////////////////////////////////////////////////////////////////// using namespace ::__llvm_libc::aarch64; if (count == 0) // [0, 0] return 0; if (count == 1) // [1, 1] return three_way_compare<_1>(lhs, rhs); if (count == 2) // [2, 2] return three_way_compare<_2>(lhs, rhs); if (count == 3) // [3, 3] return three_way_compare<_3>(lhs, rhs); if (count < 8) // [4, 7] return three_way_compare<HeadTail<_4>>(lhs, rhs, count); if (count < 16) // [8, 15] return three_way_compare<HeadTail<_8>>(lhs, rhs, count); if (unlikely(count >= 128)) // [128, ∞] return three_way_compare<Align<_16>::Then<Loop<_32>>>(lhs, rhs, count); if (!equals<_16>(lhs, rhs)) // [16, 16] return three_way_compare<_16>(lhs, rhs); if (count < 32) // [17, 31] return three_way_compare<Tail<_16>>(lhs, rhs, count); if (!equals<Skip<16>::Then<_16>>(lhs, rhs)) // [32, 32] return three_way_compare<Skip<16>::Then<_16>>(lhs, rhs); if (count < 64) // [33, 63] return three_way_compare<Tail<_32>>(lhs, rhs, count); // [64, 127] return three_way_compare<Skip<32>::Then<Loop<_16>>>(lhs, rhs, count); #else ///////////////////////////////////////////////////////////////////////////// // Default ///////////////////////////////////////////////////////////////////////////// using namespace ::__llvm_libc::scalar; if (count == 0) return 0; if (count == 1) return three_way_compare<_1>(lhs, rhs); if (count == 2) return three_way_compare<_2>(lhs, rhs); if (count == 3) return three_way_compare<_3>(lhs, rhs); if (count <= 8) return three_way_compare<HeadTail<_4>>(lhs, rhs, count); if (count <= 16) return three_way_compare<HeadTail<_8>>(lhs, rhs, count); if (count <= 32) return three_way_compare<HeadTail<_16>>(lhs, rhs, count); if (count <= 64) return three_way_compare<HeadTail<_32>>(lhs, rhs, count); if (count <= 128) return three_way_compare<HeadTail<_64>>(lhs, rhs, count); return three_way_compare<Align<_32>::Then<Loop<_32>>>(lhs, rhs, count); #endif } } // namespace __llvm_libc #endif // LLVM_LIBC_SRC_STRING_MEMORY_UTILS_MEMCMP_IMPLEMENTATIONS_H