12ceb2ce9SGarrett Wollman/* 22ceb2ce9SGarrett Wollman * Copyright (c) 1993 Winning Strategies, Inc. 32ceb2ce9SGarrett Wollman * All rights reserved. 42ceb2ce9SGarrett Wollman * 52ceb2ce9SGarrett Wollman * Redistribution and use in source and binary forms, with or without 62ceb2ce9SGarrett Wollman * modification, are permitted provided that the following conditions 72ceb2ce9SGarrett Wollman * are met: 82ceb2ce9SGarrett Wollman * 1. Redistributions of source code must retain the above copyright 92ceb2ce9SGarrett Wollman * notice, this list of conditions and the following disclaimer. 102ceb2ce9SGarrett Wollman * 2. Redistributions in binary form must reproduce the above copyright 112ceb2ce9SGarrett Wollman * notice, this list of conditions and the following disclaimer in the 122ceb2ce9SGarrett Wollman * documentation and/or other materials provided with the distribution. 132ceb2ce9SGarrett Wollman * 3. All advertising materials mentioning features or use of this software 142ceb2ce9SGarrett Wollman * must display the following acknowledgement: 152ceb2ce9SGarrett Wollman * This product includes software developed by Winning Strategies, Inc. 162ceb2ce9SGarrett Wollman * 4. The name of the author may not be used to endorse or promote products 1721dc7d4fSJens Schweikhardt * derived from this software without specific prior written permission 182ceb2ce9SGarrett Wollman * 192ceb2ce9SGarrett Wollman * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 202ceb2ce9SGarrett Wollman * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 212ceb2ce9SGarrett Wollman * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 222ceb2ce9SGarrett Wollman * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 232ceb2ce9SGarrett Wollman * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 242ceb2ce9SGarrett Wollman * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 252ceb2ce9SGarrett Wollman * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 262ceb2ce9SGarrett Wollman * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 272ceb2ce9SGarrett Wollman * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 282ceb2ce9SGarrett Wollman * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 292ceb2ce9SGarrett Wollman */ 302ceb2ce9SGarrett Wollman 31e6d808aeSPeter Wemm#include <machine/asm.h> 322ceb2ce9SGarrett Wollman/* 332ceb2ce9SGarrett Wollman * strcpy (dst, src) 342ceb2ce9SGarrett Wollman * copy the string src to dst. 352ceb2ce9SGarrett Wollman * 362ceb2ce9SGarrett Wollman * Written by: 372ceb2ce9SGarrett Wollman * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc. 382ceb2ce9SGarrett Wollman */ 392ceb2ce9SGarrett Wollman 402ceb2ce9SGarrett Wollman/* 412ceb2ce9SGarrett Wollman * I've unrolled the loop eight times: large enough to make a 422ceb2ce9SGarrett Wollman * significant difference, and small enough not to totally trash the 4329ec6237SBill Fumerola * cache. 442ceb2ce9SGarrett Wollman */ 452ceb2ce9SGarrett Wollman 462ceb2ce9SGarrett WollmanENTRY(strcpy) 472ceb2ce9SGarrett Wollman movl 4(%esp),%ecx /* dst address */ 482ceb2ce9SGarrett Wollman movl 8(%esp),%edx /* src address */ 492ceb2ce9SGarrett Wollman pushl %ecx /* push dst address */ 502ceb2ce9SGarrett Wollman 512ceb2ce9SGarrett Wollman .align 2,0x90 522ceb2ce9SGarrett WollmanL1: movb (%edx),%al /* unroll loop, but not too much */ 532ceb2ce9SGarrett Wollman movb %al,(%ecx) 542ceb2ce9SGarrett Wollman testb %al,%al 552ceb2ce9SGarrett Wollman je L2 562ceb2ce9SGarrett Wollman movb 1(%edx),%al 572ceb2ce9SGarrett Wollman movb %al,1(%ecx) 582ceb2ce9SGarrett Wollman testb %al,%al 592ceb2ce9SGarrett Wollman je L2 602ceb2ce9SGarrett Wollman movb 2(%edx),%al 612ceb2ce9SGarrett Wollman movb %al,2(%ecx) 622ceb2ce9SGarrett Wollman testb %al,%al 632ceb2ce9SGarrett Wollman je L2 642ceb2ce9SGarrett Wollman movb 3(%edx),%al 652ceb2ce9SGarrett Wollman movb %al,3(%ecx) 662ceb2ce9SGarrett Wollman testb %al,%al 672ceb2ce9SGarrett Wollman je L2 682ceb2ce9SGarrett Wollman movb 4(%edx),%al 692ceb2ce9SGarrett Wollman movb %al,4(%ecx) 702ceb2ce9SGarrett Wollman testb %al,%al 712ceb2ce9SGarrett Wollman je L2 722ceb2ce9SGarrett Wollman movb 5(%edx),%al 732ceb2ce9SGarrett Wollman movb %al,5(%ecx) 742ceb2ce9SGarrett Wollman testb %al,%al 752ceb2ce9SGarrett Wollman je L2 762ceb2ce9SGarrett Wollman movb 6(%edx),%al 772ceb2ce9SGarrett Wollman movb %al,6(%ecx) 782ceb2ce9SGarrett Wollman testb %al,%al 792ceb2ce9SGarrett Wollman je L2 802ceb2ce9SGarrett Wollman movb 7(%edx),%al 812ceb2ce9SGarrett Wollman movb %al,7(%ecx) 822ceb2ce9SGarrett Wollman addl $8,%edx 832ceb2ce9SGarrett Wollman addl $8,%ecx 842ceb2ce9SGarrett Wollman testb %al,%al 852ceb2ce9SGarrett Wollman jne L1 862ceb2ce9SGarrett WollmanL2: popl %eax /* pop dst address */ 872ceb2ce9SGarrett Wollman ret 88ed820052SPeter WemmEND(strcpy) 89*93ab7586SKonstantin Belousov 90*93ab7586SKonstantin Belousov .section .note.GNU-stack,"",%progbits 91