scanc.S revision 1.1
1 1.1 fvdl /* $NetBSD: scanc.S,v 1.1 2001/06/19 00:22:47 fvdl Exp $ */ 2 1.1 fvdl 3 1.1 fvdl /*- 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 * 3. All advertising materials mentioning features or use of this software 19 1.1 fvdl * must display the following acknowledgement: 20 1.1 fvdl * This product includes software developed by the NetBSD 21 1.1 fvdl * Foundation, Inc. and its contributors. 22 1.1 fvdl * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1 fvdl * contributors may be used to endorse or promote products derived 24 1.1 fvdl * from this software without specific prior written permission. 25 1.1 fvdl * 26 1.1 fvdl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1 fvdl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1 fvdl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1 fvdl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1 fvdl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1 fvdl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1 fvdl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1 fvdl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1 fvdl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1 fvdl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1 fvdl * POSSIBILITY OF SUCH DAMAGE. 37 1.1 fvdl */ 38 1.1 fvdl 39 1.1 fvdl /* 40 1.1 fvdl * Adapted for NetBSD/x86_64 by Frank van der Linden <fvdl (at) wasabisystems.com> 41 1.1 fvdl */ 42 1.1 fvdl 43 1.1 fvdl #include <machine/asm.h> 44 1.1 fvdl 45 1.1 fvdl ENTRY(scanc) 46 1.1 fvdl movq %rdx,%r11 47 1.1 fvdl movb %cl,%dl 48 1.1 fvdl movl %edi,%ecx 49 1.1 fvdl testl %ecx,%ecx 50 1.1 fvdl jz 2f 51 1.1 fvdl movq %r11,%rdi 52 1.1 fvdl xorq %rax,%rax 53 1.1 fvdl cld 54 1.1 fvdl 1: 55 1.1 fvdl lodsb 56 1.1 fvdl testb %dl,(%rax,%rdi) 57 1.1 fvdl jnz 2f 58 1.1 fvdl decl %ecx 59 1.1 fvdl jnz 1b 60 1.1 fvdl 2: 61 1.1 fvdl movl %ecx,%eax 62 1.1 fvdl ret 63
Indexes created Sat Sep 27 14:09:57 GMT 2025