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scanc.S revision 1.2.44.1 
      1  1.2.44.1  jdolecek /*	$NetBSD: scanc.S,v 1.2.44.1 2017/12/03 11:38:46 jdolecek Exp $	*/
      2       1.1      fvdl 
      3  1.2.44.1  jdolecek /*
      4       1.1      fvdl  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5       1.1      fvdl  * All rights reserved.
      6       1.1      fvdl  *
      7       1.1      fvdl  * This code is derived from software contributed to The NetBSD Foundation
      8       1.1      fvdl  * by Charles M. Hannum.
      9       1.1      fvdl  *
     10       1.1      fvdl  * Redistribution and use in source and binary forms, with or without
     11       1.1      fvdl  * modification, are permitted provided that the following conditions
     12       1.1      fvdl  * are met:
     13       1.1      fvdl  * 1. Redistributions of source code must retain the above copyright
     14       1.1      fvdl  *    notice, this list of conditions and the following disclaimer.
     15       1.1      fvdl  * 2. Redistributions in binary form must reproduce the above copyright
     16       1.1      fvdl  *    notice, this list of conditions and the following disclaimer in the
     17       1.1      fvdl  *    documentation and/or other materials provided with the distribution.
     18       1.1      fvdl  *
     19       1.1      fvdl  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20       1.1      fvdl  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21       1.1      fvdl  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22       1.1      fvdl  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23       1.1      fvdl  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24       1.1      fvdl  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25       1.1      fvdl  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26       1.1      fvdl  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27       1.1      fvdl  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28       1.1      fvdl  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29       1.1      fvdl  * POSSIBILITY OF SUCH DAMAGE.
     30       1.1      fvdl  */
     31       1.1      fvdl 
     32       1.1      fvdl /*
     33       1.1      fvdl  * Adapted for NetBSD/x86_64 by Frank van der Linden <fvdl (at) wasabisystems.com>
     34       1.1      fvdl  */
     35       1.1      fvdl 
     36       1.1      fvdl #include <machine/asm.h>
     37       1.1      fvdl 
     38       1.1      fvdl ENTRY(scanc)
     39       1.1      fvdl 	movq	%rdx,%r11
     40       1.1      fvdl 	movb	%cl,%dl
     41       1.1      fvdl 	movl	%edi,%ecx
     42       1.1      fvdl 	testl	%ecx,%ecx
     43       1.1      fvdl 	jz	2f
     44       1.1      fvdl 	movq	%r11,%rdi
     45       1.1      fvdl 	xorq	%rax,%rax
     46       1.1      fvdl 	cld
     47       1.1      fvdl 1:
     48       1.1      fvdl 	lodsb
     49       1.1      fvdl 	testb	%dl,(%rax,%rdi)
     50       1.1      fvdl 	jnz	2f
     51       1.1      fvdl 	decl	%ecx
     52       1.1      fvdl 	jnz	1b
     53       1.1      fvdl 2:
     54       1.1      fvdl 	movl	%ecx,%eax
     55       1.1      fvdl 	ret
     56  1.2.44.1  jdolecek END(scanc)
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