/* memset implementation for the dynamic linker. This is separate from the libc implementation to avoid writing to SSE registers. Copyright (C) 2013-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see . */ #include #include "asm-syntax.h" .text /* void *memset (void *dest, char c, size_t count) dest => %rdi c => %rsi count => %rdx */ ENTRY (memset) mov %rdx, %rcx movzbl %sil, %eax mov %rdi, %rdx rep stosb mov %rdx, %rax ret END (memset) libc_hidden_builtin_def (memset)