/* Set a block of memory to some byte value.  64 bit S/390 version.

   Copyright (C) 2001-2018 Free Software Foundation, Inc.

   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).

   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>

#include "asm-syntax.h"

/* INPUT PARAMETERS

     %r2 = address of memory area

     %r3 = byte to fill memory with

     %r4 = number of bytes to fill.  */

       .text

#ifdef USE_MULTIARCH

ENTRY(__memset_default)

#else

ENTRY(memset)

#endif

	.machine "z900"

	ltgr    %r4,%r4

	je      .L_Z900_4

	stc     %r3,0(%r2)

	cghi    %r4,1

	lgr     %r1,%r2

	je      .L_Z900_4

	aghi    %r4,-2

	srlg    %r3,%r4,8

	ltgr    %r3,%r3

	jne     .L_Z900_14

.L_Z900_3:

	larl    %r3,.L_Z900_18

	ex      %r4,0(%r3)

.L_Z900_4:

	br      %r14

.L_Z900_14:

	mvc     1(256,%r1),0(%r1)

	la      %r1,256(%r1)

	brctg   %r3,.L_Z900_14

	j       .L_Z900_3

.L_Z900_18:

	mvc     1(1,%r1),0(%r1)

#ifdef USE_MULTIARCH

END(__memset_default)

#else

END(memset)

libc_hidden_builtin_def (memset)

#endif