1*787e823fSmatt/* $NetBSD: bcopy.S,v 1.4 2011/01/25 02:38:15 matt Exp $ */ 292a955a8Sragge/* 392a955a8Sragge * Copyright (c) 1983, 1993 492a955a8Sragge * The Regents of the University of California. All rights reserved. 592a955a8Sragge * 692a955a8Sragge * Redistribution and use in source and binary forms, with or without 792a955a8Sragge * modification, are permitted provided that the following conditions 892a955a8Sragge * are met: 992a955a8Sragge * 1. Redistributions of source code must retain the above copyright 1092a955a8Sragge * notice, this list of conditions and the following disclaimer. 1192a955a8Sragge * 2. Redistributions in binary form must reproduce the above copyright 1292a955a8Sragge * notice, this list of conditions and the following disclaimer in the 1392a955a8Sragge * documentation and/or other materials provided with the distribution. 14eb7c1594Sagc * 3. Neither the name of the University nor the names of its contributors 1592a955a8Sragge * may be used to endorse or promote products derived from this software 1692a955a8Sragge * without specific prior written permission. 1792a955a8Sragge * 1892a955a8Sragge * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1992a955a8Sragge * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2092a955a8Sragge * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2192a955a8Sragge * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2292a955a8Sragge * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2392a955a8Sragge * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2492a955a8Sragge * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2592a955a8Sragge * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2692a955a8Sragge * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2792a955a8Sragge * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2892a955a8Sragge * SUCH DAMAGE. 2992a955a8Sragge */ 3092a955a8Sragge 3192a955a8Sragge/* bcopy(from, to, size) */ 3292a955a8Sragge 3392a955a8Sragge#include "DEFS.h" 3492a955a8Sragge 35*787e823fSmatt#if defined(LIBC_SCCS) 36*787e823fSmatt /* .asciz "@(#)bcopy.s 8.1 (Berkeley) 6/4/93" */ 37*787e823fSmattRCSID("$NetBSD: bcopy.S,v 1.4 2011/01/25 02:38:15 matt Exp $") 38*787e823fSmatt#endif 39*787e823fSmatt 40*787e823fSmatt 4192a955a8SraggeENTRY(bcopy, R6) 420ce5ca14Smatt movl 4(%ap),%r1 430ce5ca14Smatt movl 8(%ap),%r3 440ce5ca14Smatt movl 12(%ap),%r6 450ce5ca14Smatt cmpl %r1,%r3 4692a955a8Sragge bgtr 2f # normal forward case 4792a955a8Sragge blss 3f # overlapping, must do backwards 4892a955a8Sragge ret # equal, nothing to do 4992a955a8Sragge1: 500ce5ca14Smatt subl2 %r0,%r6 510ce5ca14Smatt movc3 %r0,(%r1),(%r3) 5292a955a8Sragge2: 530ce5ca14Smatt movzwl $65535,%r0 540ce5ca14Smatt cmpl %r6,%r0 5592a955a8Sragge jgtr 1b 560ce5ca14Smatt movc3 %r6,(%r1),(%r3) 5792a955a8Sragge ret 5892a955a8Sragge3: 590ce5ca14Smatt addl2 %r6,%r1 600ce5ca14Smatt addl2 %r6,%r3 610ce5ca14Smatt movzwl $65535,%r0 6292a955a8Sragge jbr 5f 6392a955a8Sragge4: 640ce5ca14Smatt subl2 %r0,%r6 650ce5ca14Smatt subl2 %r0,%r1 660ce5ca14Smatt subl2 %r0,%r3 670ce5ca14Smatt movc3 %r0,(%r1),(%r3) 680ce5ca14Smatt movzwl $65535,%r0 690ce5ca14Smatt subl2 %r0,%r1 700ce5ca14Smatt subl2 %r0,%r3 7192a955a8Sragge5: 720ce5ca14Smatt cmpl %r6,%r0 7392a955a8Sragge jgtr 4b 740ce5ca14Smatt subl2 %r6,%r1 750ce5ca14Smatt subl2 %r6,%r3 760ce5ca14Smatt movc3 %r6,(%r1),(%r3) 7792a955a8Sragge ret 78*787e823fSmattEND(bcopy) 79