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Annotation of 43BSDReno/lib/libc/vax/string/strcpy.s, revision 1.1

1.1     ! root        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: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #if defined(LIBC_SCCS) && !defined(lint)
        !            21:        .asciz "@(#)strcpy.s    5.6 (Berkeley) 6/1/90"
        !            22: #endif /* LIBC_SCCS and not lint */
        !            23: 
        !            24: /*
        !            25:  * Copy string s2 over top of s1.
        !            26:  * Return base of s1.
        !            27:  *
        !            28:  * char *
        !            29:  * strcpy(s1, s2)
        !            30:  *     char *s1, *s2;
        !            31:  */
        !            32: #include "DEFS.h"
        !            33: 
        !            34: ENTRY(strcpy, R6)
        !            35:        movl    4(ap), r3       # r3 = s1
        !            36:        movl    8(ap), r6       # r6 = s2
        !            37: 1:
        !            38:        locc    $0,$65535,(r6)  # find length of s2
        !            39:        bneq    2f
        !            40:        movc3   $65535,(r6),(r3)# copy full block
        !            41:        movl    r1,r6
        !            42:        jbr     1b
        !            43: 2:
        !            44:        subl2   r6,r1           # calculate length
        !            45:        incl    r1
        !            46:        movc3   r1,(r6),(r3)    # copy remainder
        !            47:        movl    4(ap),r0        # return base of s1
        !            48:        ret

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