1*71db0c75SAndroid Build Coastguard Worker //===-- Implementation of memset_explicit ---------------------------------===// 2*71db0c75SAndroid Build Coastguard Worker // 3*71db0c75SAndroid Build Coastguard Worker // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*71db0c75SAndroid Build Coastguard Worker // See https://llvm.org/LICENSE.txt for license information. 5*71db0c75SAndroid Build Coastguard Worker // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*71db0c75SAndroid Build Coastguard Worker // 7*71db0c75SAndroid Build Coastguard Worker //===----------------------------------------------------------------------===// 8*71db0c75SAndroid Build Coastguard Worker 9*71db0c75SAndroid Build Coastguard Worker #include "src/string/memset_explicit.h" 10*71db0c75SAndroid Build Coastguard Worker #include "src/__support/common.h" 11*71db0c75SAndroid Build Coastguard Worker #include "src/__support/macros/config.h" 12*71db0c75SAndroid Build Coastguard Worker #include "src/string/memory_utils/inline_memset.h" 13*71db0c75SAndroid Build Coastguard Worker 14*71db0c75SAndroid Build Coastguard Worker namespace LIBC_NAMESPACE_DECL { 15*71db0c75SAndroid Build Coastguard Worker 16*71db0c75SAndroid Build Coastguard Worker [[gnu::noinline]] LLVM_LIBC_FUNCTION(void *, memset_explicit, 17*71db0c75SAndroid Build Coastguard Worker (void *dst, int value, size_t count)) { 18*71db0c75SAndroid Build Coastguard Worker // Use the inline memset function to set the memory. 19*71db0c75SAndroid Build Coastguard Worker inline_memset(dst, static_cast<uint8_t>(value), count); 20*71db0c75SAndroid Build Coastguard Worker // avoid dead store elimination 21*71db0c75SAndroid Build Coastguard Worker // The asm itself should also be sufficient to behave as a compiler barrier. 22*71db0c75SAndroid Build Coastguard Worker asm("" : : "r"(dst) : "memory"); 23*71db0c75SAndroid Build Coastguard Worker return dst; 24*71db0c75SAndroid Build Coastguard Worker } 25*71db0c75SAndroid Build Coastguard Worker 26*71db0c75SAndroid Build Coastguard Worker } // namespace LIBC_NAMESPACE_DECL 27