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Annotation of sys/lib/libkern/arch/i386/scanc.S, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: scanc.S,v 1.2 1996/09/27 06:47:48 mickey Exp $        */
                      2: /*     $NetBSD: scanc.S,v 1.5 1994/10/26 06:39:13 cgd Exp $    */
                      3:
                      4: /*
                      5:  * Copyright (c) 1994 Charles Hannum.  All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. All advertising materials mentioning features or use of this software
                     16:  *    must display the following acknowledgement:
                     17:  *     This product includes software developed by Charles Hannum.
                     18:  * 4. The name of the author may not be used to endorse or promote products
                     19:  *    derived from this software without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     22:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     23:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     24:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     25:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     26:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     27:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     28:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     29:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     30:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     31:  */
                     32:
                     33: #include "DEFS.h"
                     34:
                     35: ENTRY(scanc)
                     36:        movl    4(%esp),%ecx
                     37:        testl   %ecx,%ecx
                     38:        jz      3f
                     39:        pushl   %esi
                     40:        pushl   %edi
                     41:        movl    16(%esp),%esi
                     42:        movl    20(%esp),%edi
                     43:        movb    24(%esp),%dl
                     44:        xorl    %eax,%eax
                     45:        cld
                     46: 1:
                     47:        lodsb
                     48:        testb   %dl,(%eax,%edi)
                     49:        jnz     2f
                     50:        decl    %ecx
                     51:        jnz     1b
                     52: 2:
                     53:        popl    %edi
                     54:        popl    %esi
                     55: 3:
                     56:        movl    %ecx,%eax
                     57:        ret