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+/* bcopy -- copy a block from source to destination. 64 bit S/390 version.
+ This file is part of the GNU C Library.
+ Copyright (C) 2001 Free Software Foundation, Inc.
+ Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+
+ The GNU C Library is free software ; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation ; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/* INPUT PARAMETERS
+ %r2 = address of source
+ %r3 = address of destination
+ %r4 = number of bytes to copy. */
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+
+ .text
+ENTRY(__bcopy)
+ clgr %r2,%r3 # check against destructive overlap
+ jnl .L0
+ lgr %r1,%r2
+ algr %r1,%r4
+ clgr %r1,%r3
+ jh .L2
+.L0:
+ lgr %r5,%r4 # source length
+ lgr %r4,%r2 # source address
+ sgr %r1,%r1 # set pad byte to zero
+ lgr %r2,%r3 # set destination
+ lgr %r3,%r5 # destination length = source length
+.L1: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend
+ jo .L1
+ br %r14
+.L2: # destructive overlay, can not use mvcle
+ lgr %r1,%r2 # bcopy is called with source,dest
+ lgr %r2,%r3 # memmove with dest,source! Oh, well...
+ lgr %r3,%r1
+#ifdef PIC
+ jg memmove@PLT
+#else
+ jg memmove
+#endif
+
+END(__bcopy)
+
+#ifndef NO_WEAK_ALIAS
+weak_alias (__bcopy, bcopy)
+#endif
+