49 lines · cpp
1//===------- LibC.cpp - Simple implementation of libc functions --- 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-exception6//7//===----------------------------------------------------------------------===//8 9#include "LibC.h"10 11#if defined(__AMDGPU__) && !defined(OMPTARGET_HAS_LIBC)12extern "C" int vprintf(const char *format, __builtin_va_list) { return -1; }13#else14extern "C" int vprintf(const char *format, __builtin_va_list);15#endif16 17extern "C" {18[[gnu::weak]] int memcmp(const void *lhs, const void *rhs, size_t count) {19 auto *L = reinterpret_cast<const unsigned char *>(lhs);20 auto *R = reinterpret_cast<const unsigned char *>(rhs);21 22 for (size_t I = 0; I < count; ++I)23 if (L[I] != R[I])24 return (int)L[I] - (int)R[I];25 26 return 0;27}28 29[[gnu::weak]] void memset(void *dst, int C, size_t count) {30 auto *dstc = reinterpret_cast<char *>(dst);31 for (size_t I = 0; I < count; ++I)32 dstc[I] = C;33}34 35[[gnu::weak]] int printf(const char *Format, ...) {36 __builtin_va_list vlist;37 __builtin_va_start(vlist, Format);38 return ::vprintf(Format, vlist);39}40}41 42namespace ompx {43[[clang::no_builtin("printf")]] int printf(const char *Format, ...) {44 __builtin_va_list vlist;45 __builtin_va_start(vlist, Format);46 return ::vprintf(Format, vlist);47}48} // namespace ompx49