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Annotation of 43BSD/lib/libc/vax/gen/strcat.s, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #ifdef LIBC_SCCS
                      8:        .asciz  "@(#)strcat.s   5.3 (Berkeley) 3/9/86"
                      9: #endif LIBC_SCCS
                     10: 
                     11: /*
                     12:  * Concatenate string s2 to the end of s1
                     13:  * and return the base of s1.
                     14:  *
                     15:  * char *
                     16:  * strcat(s1, s2)
                     17:  *     char *s1, *s2;
                     18:  */
                     19: #include "DEFS.h"
                     20: 
                     21: ENTRY(strcat, R6|R7)
                     22:        movq    4(ap), r6       # r6 = s1; r7 = s2
                     23:        movl    r6,r1
                     24: 0:
                     25:        locc    $0,$65535,(r1)  # look for '\0'
                     26:        beql    0b
                     27:        movl    r1,r3           # save end of s1
                     28: 1:
                     29:        locc    $0,$65535,(r7)  # find length of s2
                     30:        bneq    2f
                     31:        movc3   $65535,(r7),(r3)# copy full block
                     32:        movl    r1,r7
                     33:        jbr     1b
                     34: 2:
                     35:        subl2   r7,r1           # calculate length
                     36:        incl    r1
                     37:        movc3   r1,(r7),(r3)    # copy remainder
                     38:        movl    r6,r0
                     39:        ret

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