/* memset with REP MOVSB/STOSB

   Copyright (C) 2015-2018 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

   <http://www.gnu.org/licenses/>.  */

#include <sysdep.h>

#define CFI_PUSH(REG)						\

  cfi_adjust_cfa_offset (4);					\

  cfi_rel_offset (REG, 0)

#define CFI_POP(REG)						\

  cfi_adjust_cfa_offset (-4);					\

  cfi_restore (REG)

#define PUSH(REG)	pushl REG; CFI_PUSH (REG)

#define POP(REG)	popl REG; CFI_POP (REG)

#define STR1  8

#ifdef USE_AS_BZERO

#define N     STR1+4

#else

#define STR2  STR1+4

#define N     STR2+4

#endif

	.text

#if defined SHARED && IS_IN (libc) && !defined USE_AS_BZERO

ENTRY (__memset_chk)

	movl	12(%esp), %eax

	cmpl	%eax, 16(%esp)

	jb	HIDDEN_JUMPTARGET (__chk_fail)

END (__memset_chk)

#endif

ENTRY (memset)

	PUSH    (%edi)

	movl	N(%esp), %ecx

	movl	STR1(%esp), %edi

#ifdef USE_AS_BZERO

	xor	%eax, %eax

#else

	movzbl	STR2(%esp), %eax

	mov	%edi, %edx

#endif

	rep	stosb

#ifndef USE_AS_BZERO

	mov	%edx, %eax

#endif

	POP     (%edi)

	ret

END (memset)

#ifndef USE_AS_BZERO

libc_hidden_builtin_def (memset)

#endif