/* $Id: bs3-cmn-MemCpy.c 93115 2022-01-01 11:31:46Z vboxsync $ */ /** @file * BS3Kit - Bs3MemCpy */ /* * Copyright (C) 2007-2022 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ #include "bs3kit-template-header.h" #undef Bs3MemCpy BS3_CMN_DEF(void BS3_FAR *, Bs3MemCpy,(void BS3_FAR *pvDst, const void BS3_FAR *pvSrc, size_t cbToCopy)) { #if 1 const size_t BS3_FAR *pBigSrc = (const size_t BS3_FAR *)pvSrc; size_t BS3_FAR *pBigDst = (size_t *)pvDst; size_t cBig = cbToCopy / sizeof(size_t); while (cBig-- > 0) *pBigDst++ = *pBigSrc++; switch (cbToCopy % sizeof(size_t)) { #if TMPL_BITS >= 64 case 7: ((uint8_t BS3_FAR *)pBigDst)[6] = ((const uint8_t BS3_FAR *)pBigSrc)[6]; case 6: ((uint8_t BS3_FAR *)pBigDst)[5] = ((const uint8_t BS3_FAR *)pBigSrc)[5]; case 5: ((uint8_t BS3_FAR *)pBigDst)[4] = ((const uint8_t BS3_FAR *)pBigSrc)[4]; case 4: ((uint8_t BS3_FAR *)pBigDst)[3] = ((const uint8_t BS3_FAR *)pBigSrc)[3]; #endif #if TMPL_BITS >= 32 case 3: ((uint8_t BS3_FAR *)pBigDst)[2] = ((const uint8_t BS3_FAR *)pBigSrc)[2]; case 2: ((uint8_t BS3_FAR *)pBigDst)[1] = ((const uint8_t BS3_FAR *)pBigSrc)[1]; #endif case 1: ((uint8_t BS3_FAR *)pBigDst)[0] = ((const uint8_t BS3_FAR *)pBigSrc)[0]; case 0: break; } #else size_t cLargeRounds; BS3CPTRUNION uSrc; BS3PTRUNION uDst; uSrc.pv = pvSrc; uDst.pv = pvDst; cLargeRounds = cbToCopy / sizeof(*uSrc.pcb); while (cLargeRounds-- > 0) *uDst.pcb++ = *uSrc.pcb++; cbToCopy %= sizeof(*uSrc.pcb); while (cbToCopy-- > 0) *uDst.pb++ = *uSrc.pb++; #endif return pvDst; }