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67 lines
2.4 KiB
ArmAsm
67 lines
2.4 KiB
ArmAsm
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/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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.asciz "@(#)strcat.s 5.6 (Berkeley) 6/1/90"
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#endif /* LIBC_SCCS and not lint */
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/*
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* Concatenate string s2 to the end of s1
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* and return the base of s1.
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*
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* char *
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* strcat(s1, s2)
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* char *s1, *s2;
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*/
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#include "DEFS.h"
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ENTRY(strcat, R6|R7)
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movq 4(ap), r6 # r6 = s1; r7 = s2
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movl r6,r1
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0:
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locc $0,$65535,(r1) # look for '\0'
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beql 0b
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movl r1,r3 # save end of s1
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1:
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locc $0,$65535,(r7) # find length of s2
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bneq 2f
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movc3 $65535,(r7),(r3)# copy full block
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movl r1,r7
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jbr 1b
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2:
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subl2 r7,r1 # calculate length
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incl r1
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movc3 r1,(r7),(r3) # copy remainder
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movl r6,r0
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ret
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