27 lines · cpp
1//===-- Implementation of memset_explicit ---------------------------------===//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 "src/string/memset_explicit.h"10#include "src/__support/common.h"11#include "src/__support/macros/config.h"12#include "src/string/memory_utils/inline_memset.h"13 14namespace LIBC_NAMESPACE_DECL {15 16[[gnu::noinline]] LLVM_LIBC_FUNCTION(void *, memset_explicit,17 (void *dst, int value, size_t count)) {18 // Use the inline memset function to set the memory.19 inline_memset(dst, static_cast<uint8_t>(value), count);20 // avoid dead store elimination21 // The asm itself should also be sufficient to behave as a compiler barrier.22 asm("" : : "r"(dst) : "memory");23 return dst;24}25 26} // namespace LIBC_NAMESPACE_DECL27