1*e415d488SLionel Sambuc/* $NetBSD: bcopy.S,v 1.4 2011/01/25 02:38:15 matt Exp $ */ 22fe8fb19SBen Gras/* 32fe8fb19SBen Gras * Copyright (c) 1983, 1993 42fe8fb19SBen Gras * The Regents of the University of California. All rights reserved. 52fe8fb19SBen Gras * 62fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 72fe8fb19SBen Gras * modification, are permitted provided that the following conditions 82fe8fb19SBen Gras * are met: 92fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 102fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 112fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 122fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 132fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 142fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors 152fe8fb19SBen Gras * may be used to endorse or promote products derived from this software 162fe8fb19SBen Gras * without specific prior written permission. 172fe8fb19SBen Gras * 182fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 192fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 202fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 212fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 222fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 232fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 242fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 252fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 262fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 272fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 282fe8fb19SBen Gras * SUCH DAMAGE. 292fe8fb19SBen Gras */ 302fe8fb19SBen Gras 312fe8fb19SBen Gras/* bcopy(from, to, size) */ 322fe8fb19SBen Gras 332fe8fb19SBen Gras#include "DEFS.h" 342fe8fb19SBen Gras 35*e415d488SLionel Sambuc#if defined(LIBC_SCCS) 36*e415d488SLionel Sambuc /* .asciz "@(#)bcopy.s 8.1 (Berkeley) 6/4/93" */ 37*e415d488SLionel SambucRCSID("$NetBSD: bcopy.S,v 1.4 2011/01/25 02:38:15 matt Exp $") 38*e415d488SLionel Sambuc#endif 39*e415d488SLionel Sambuc 40*e415d488SLionel Sambuc 412fe8fb19SBen GrasENTRY(bcopy, R6) 422fe8fb19SBen Gras movl 4(%ap),%r1 432fe8fb19SBen Gras movl 8(%ap),%r3 442fe8fb19SBen Gras movl 12(%ap),%r6 452fe8fb19SBen Gras cmpl %r1,%r3 462fe8fb19SBen Gras bgtr 2f # normal forward case 472fe8fb19SBen Gras blss 3f # overlapping, must do backwards 482fe8fb19SBen Gras ret # equal, nothing to do 492fe8fb19SBen Gras1: 502fe8fb19SBen Gras subl2 %r0,%r6 512fe8fb19SBen Gras movc3 %r0,(%r1),(%r3) 522fe8fb19SBen Gras2: 532fe8fb19SBen Gras movzwl $65535,%r0 542fe8fb19SBen Gras cmpl %r6,%r0 552fe8fb19SBen Gras jgtr 1b 562fe8fb19SBen Gras movc3 %r6,(%r1),(%r3) 572fe8fb19SBen Gras ret 582fe8fb19SBen Gras3: 592fe8fb19SBen Gras addl2 %r6,%r1 602fe8fb19SBen Gras addl2 %r6,%r3 612fe8fb19SBen Gras movzwl $65535,%r0 622fe8fb19SBen Gras jbr 5f 632fe8fb19SBen Gras4: 642fe8fb19SBen Gras subl2 %r0,%r6 652fe8fb19SBen Gras subl2 %r0,%r1 662fe8fb19SBen Gras subl2 %r0,%r3 672fe8fb19SBen Gras movc3 %r0,(%r1),(%r3) 682fe8fb19SBen Gras movzwl $65535,%r0 692fe8fb19SBen Gras subl2 %r0,%r1 702fe8fb19SBen Gras subl2 %r0,%r3 712fe8fb19SBen Gras5: 722fe8fb19SBen Gras cmpl %r6,%r0 732fe8fb19SBen Gras jgtr 4b 742fe8fb19SBen Gras subl2 %r6,%r1 752fe8fb19SBen Gras subl2 %r6,%r3 762fe8fb19SBen Gras movc3 %r6,(%r1),(%r3) 772fe8fb19SBen Gras ret 78*e415d488SLionel SambucEND(bcopy) 79