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[thirdparty/glibc.git] / sysdeps / s390 / strcpy-z900.S

/* strcpy - copy a string from source to destination.  64/31 bit S/390 version.
   Copyright (C) 2001-2019 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
   <https://www.gnu.org/licenses/>.  */

/* INPUT PARAMETERS
     %r2 = address of destination
     %r3 = address of source.  */

#include <ifunc-strcpy.h>
#include "sysdep.h"
#include "asm-syntax.h"

#if HAVE_STRCPY_Z900_G5
# if defined __s390x__
#  define SLGR	slgr
#  define LGR	lgr
# else
#  define SLGR	slr
#  define LGR	lr
# endif /* ! defined __s390x__  */

        .text
ENTRY(STRCPY_Z900_G5)
	SLGR  %r0,%r0
	LGR   %r1,%r2
0:	mvst  %r1,%r3
	jo    0b
	br    %r14
END(STRCPY_Z900_G5)

# undef SLGR
# undef LGR

# if ! HAVE_STRCPY_IFUNC
strong_alias (STRCPY_Z900_G5, strcpy)
# endif

# if defined SHARED && IS_IN (libc)
strong_alias (STRCPY_Z900_G5, __GI_strcpy)
# endif
#endif