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glibc/sysdeps/vax/strcpy.s
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/* | |
* Copyright (c) 1983 Regents of the University of California. | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* 4. Neither the name of the University nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
* SUCH DAMAGE. | |
*/ | |
#if defined(LIBC_SCCS) && !defined(lint) | |
.asciz "@(#)strcpy.s 5.6 (Berkeley) 6/1/90" | |
#endif /* LIBC_SCCS and not lint */ | |
/* | |
* Copy string s2 over top of s1. | |
* Return base of s1. | |
* | |
* char * | |
* strcpy(s1, s2) | |
* char *s1, *s2; | |
*/ | |
#include "DEFS.h" | |
ENTRY(strcpy, R6) | |
movl 4(ap), r3 # r3 = s1 | |
movl 8(ap), r6 # r6 = s2 | |
1: | |
locc $0,$65535,(r6) # find length of s2 | |
bneq 2f | |
movc3 $65535,(r6),(r3)# copy full block | |
movl r1,r6 | |
jbr 1b | |
2: | |
subl2 r6,r1 # calculate length | |
incl r1 | |
movc3 r1,(r6),(r3) # copy remainder | |
movl 4(ap),r0 # return base of s1 | |
ret |