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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
44 lines
1.5 KiB
ArmAsm
44 lines
1.5 KiB
ArmAsm
/* Set a block of memory to some byte value. 64 bit S/390 version.
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Copyright (C) 2001 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* INPUT PARAMETERS
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%r2 = address of memory area
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%r3 = byte to fill memory with
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%r4 = number of bytes to fill. */
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#include "sysdep.h"
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#include "asm-syntax.h"
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.text
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ENTRY(memset)
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ltgr %r4,%r4
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jz .L1
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lgr %r0,%r2 # save source address
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lgr %r1,%r3 # move pad byte to R1
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lgr %r3,%r4
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sgr %r4,%r4 # no source for MVCLE, only a pad byte
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sgr %r5,%r5
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.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend
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jo .L0
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lgr %r2,%r0 # return value is source address
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.L1:
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br %r14
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END(memset)
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