53 lines
1.6 KiB
ArmAsm
53 lines
1.6 KiB
ArmAsm
/*
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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 are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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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