11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $OpenBSD: bcopy.S,v 1.5 2005/08/07 11:30:38 espie Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 1990 The Regents of the University of California. 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * This code is derived from locore.s. 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <machine/asm.h> 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * (ov)bcopy (src,dst,cnt) 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ws@tools.de (Wolfgang Solfrank, TooLs GmbH) +49-228-985800 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef MEMCOPY 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source ProjectENTRY(memcpy) 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#else 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifdef MEMMOVE 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source ProjectENTRY(memmove) 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#else 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source ProjectENTRY(bcopy) 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pushl %esi 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project pushl %edi 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#if defined(MEMCOPY) || defined(MEMMOVE) 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl 12(%esp),%edi 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl 16(%esp),%esi 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl %edi, %eax 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#else 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl 12(%esp),%esi 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl 16(%esp),%edi 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl 20(%esp),%ecx 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl %ecx,%edx 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cmpl %esi,%edi /* potentially overlapping? */ 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project jnb 1f 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cld /* nope, copy forwards. */ 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project shrl $2,%ecx /* copy by words */ 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project rep 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movsl 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl %edx,%ecx 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project andl $3,%ecx /* any bytes left? */ 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project rep 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movsb 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project popl %edi 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project popl %esi 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ret 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project1: 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project addl %ecx,%edi /* copy backwards. */ 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project addl %ecx,%esi 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project std 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project andl $3,%ecx /* any fractional bytes? */ 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project decl %edi 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project decl %esi 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project rep 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movsb 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movl %edx,%ecx 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project shrl $2,%ecx 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project subl $3,%esi 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project subl $3,%edi 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project rep 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project movsl 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project popl %edi 911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project popl %esi 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cld 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ret 94