usr/src/lib/libc/vax/string/bcmp.s

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
        .asciz "@(#)bcmp.s      5.5 (Berkeley) %G%"
#endif /* LIBC_SCCS and not lint */

/* bcmp(s1, s2, n) */

#include "DEFS.h"

ENTRY(bcmp, 0)
        movl    4(ap),r1
        movl    8(ap),r3
        movl    12(ap),r4
1:
        movzwl  $65535,r0
        cmpl    r4,r0
        jleq    2f
        subl2   r0,r4
        cmpc3   r0,(r1),(r3)
        jeql    1b
        addl2   r4,r0
        ret
2:
        cmpc3   r4,(r1),(r3)
        ret