source: vbox/trunk/src/VBox/Runtime/common/asm/ASMMemFill32-generic.cpp@ 106579

/* $Id: ASMMemFill32-generic.cpp 106559 2024-10-21 12:08:33Z vboxsync $ */
/** @file
 * IPRT - ASMMemZeroPage - generic C implementation.
 */

/*
 * Copyright (C) 2021-2024 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, in version 3 of the
 * License.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <https://www.gnu.org/licenses>.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
 * in the VirtualBox 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.
 *
 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#include <iprt/asm-mem.h>
#include "internal/iprt.h"

#include <iprt/string.h>
#include <iprt/assert.h>


RT_DECL_ASM(void) ASMMemFill32(volatile void RT_FAR *pv, size_t cb, uint32_t u32) RT_NOTHROW_DEF
{
    Assert(!(cb & 3));
    size_t cFills = cb / sizeof(uint32_t);
    uint32_t *pu32Dst = (uint32_t *)pv;

    while (cFills >= 8)
    {
        pu32Dst[0] = u32;
        pu32Dst[1] = u32;
        pu32Dst[2] = u32;
        pu32Dst[3] = u32;
        pu32Dst[4] = u32;
        pu32Dst[5] = u32;
        pu32Dst[6] = u32;
        pu32Dst[7] = u32;
        pu32Dst += 8;
        cFills  -= 8;
    }

    while (cFills > 0)
    {
        *pu32Dst++ = u32;
        cFills -= 1;
    }
}