/* memset/bzero -- set memory area to CH/0   Highly optimized version for ix86, x>=6.   Copyright (C) 1999,2000,2003,2005,2006 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.   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, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <sysdep.h>#include "asm-syntax.h"#include "bp-sym.h"#include "bp-asm.h"/* BEWARE: `#ifdef memset' means that memset is redefined as `bzero' */#define BZERO_P (defined memset)#define PARMS	LINKAGE+4	/* space for 1 saved reg */#if BZERO_P# define DEST	PARMS# define LEN	DEST+PTR_SIZE#else# define RTN	PARMS# define DEST	RTN+RTN_SIZE# define CHR	DEST+PTR_SIZE# define LEN	CHR+4#endif        .text#if defined PIC && !defined NOT_IN_libc && !BZERO_PENTRY (__memset_chk)	movl	12(%esp), %eax	cmpl	%eax, 16(%esp)	jb	HIDDEN_JUMPTARGET (__chk_fail)END (__memset_chk)#endifENTRY (BP_SYM (memset))	ENTER	cld	pushl	%edi	cfi_adjust_cfa_offset (4)	movl	DEST(%esp), %edx	movl	LEN(%esp), %ecx	CHECK_BOUNDS_BOTH_WIDE (%edx, DEST(%esp), %ecx)#if BZERO_P	xorl	%eax, %eax	/* fill with 0 */#else	movzbl	CHR(%esp), %eax#endif	jecxz	1f	movl	%edx, %edi	cfi_rel_offset (edi, 0)	andl	$3, %edx	jz	2f	/* aligned */	jp	3f	/* misaligned at 3, store just one byte below */	stosb		/* misaligned at 1 or 2, store two bytes */	decl	%ecx	jz	1f3:	stosb	decl	%ecx	jz	1f	xorl	$1, %edx	jnz	2f	/* was misaligned at 2 or 3, now aligned */	stosb		/* was misaligned at 1, store third byte */	decl	%ecx2:	movl	%ecx, %edx	shrl	$2, %ecx	andl	$3, %edx#if !BZERO_P	imul	$0x01010101, %eax#endif	rep	stosl	movl	%edx, %ecx	rep	stosb1:#if !BZERO_P	movl DEST(%esp), %eax	/* start address of destination is result */	RETURN_BOUNDED_POINTER (DEST(%esp))#endif	popl	%edi	cfi_adjust_cfa_offset (-4)	cfi_restore (edi)	LEAVE#if BZERO_P	ret#else	RET_PTR#endifEND (BP_SYM (memset))libc_hidden_builtin_def (memset)#if defined PIC && !defined NOT_IN_libc && !BZERO_Pstrong_alias (__memset_chk, __memset_zero_constant_len_parameter)	.section .gnu.warning.__memset_zero_constant_len_parameter	.string "memset used with constant zero length parameter; this could be due to transposed parameters"#endif