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/* Set a block of memory to some byte value. 64 bit S/390 version.
Copyright (C) 2001-2013 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_z900)
#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_z900)
#else
END(memset)
libc_hidden_builtin_def (memset)
#endif
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