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Annotation of 43BSDTahoe/lib/libc/gen/gen.tahoe/strncmp.s, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 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 the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  *
        !            17:  * This code is derived from software contributed to Berkeley by
        !            18:  * Computer Consoles Inc.
        !            19:  */
        !            20: 
        !            21: #if defined(LIBC_SCCS) && !defined(lint)
        !            22:        .asciz "@(#)strncmp.s   1.3 (Berkeley) 6/27/88"
        !            23: #endif /* LIBC_SCCS and not lint */
        !            24: 
        !            25: /*
        !            26:  * Compare strings (at most n bytes):  s1>s2: >0  s1==s2: 0  s1<s2: <0
        !            27:  * 
        !            28:  * strncmp(s1, s2, n)
        !            29:  * register char *s1, *s2;
        !            30:  * register n;
        !            31:  */
        !            32: #include "DEFS.h"
        !            33: 
        !            34: ENTRY(strncmp, 0)
        !            35:        movl    12(fp),r2
        !            36:        tstl    r2              /* number of bytes to compare */
        !            37:        jgtr    n_ok
        !            38:        clrl    r0
        !            39:        ret                     /* for n <= 0 , s1 == s2 */
        !            40: n_ok:
        !            41:        movl    4(fp),r0
        !            42:        movl    8(fp),r1
        !            43:        cmps3
        !            44:        jgtr    greater
        !            45:        jlss    less
        !            46: equal: clrl    r0
        !            47:        ret
        !            48: less:  movl    $-1,r0
        !            49:        ret
        !            50: greater: movl  $1,r0
        !            51:        ret

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