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Annotation of 43BSDTahoe/lib/libc/gen/gen.tahoe/strncmp.s, revision 1.1.1.1

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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