1/* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific written prior permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 */ 12 13#if defined(SYSLIBC_SCCS) && !defined(lint) 14_sccsid:.asciz "@(#)strcat.s 5.4 (Berkeley) 05/25/88" 15#endif /* SYSLIBC_SCCS and not lint */ 16 17/* 18 * Concatenate string s2 to the end of s1 19 * and return the base of s1. 20 * 21 * char * 22 * strcat(s1, s2) 23 * char *s1, *s2; 24 */ 25#include "DEFS.h" 26 27ENTRY(strcat, R6|R7) 28 movq 4(ap), r6 # r6 = s1; r7 = s2 29 movl r6,r1 300: 31 locc $0,$65535,(r1) # look for '\0' 32 beql 0b 33 movl r1,r3 # save end of s1 341: 35 locc $0,$65535,(r7) # find length of s2 36 bneq 2f 37 movc3 $65535,(r7),(r3)# copy full block 38 movl r1,r7 39 jbr 1b 402: 41 subl2 r7,r1 # calculate length 42 incl r1 43 movc3 r1,(r7),(r3) # copy remainder 44 movl r6,r0 45 ret 46