/* $Id: bs3-cmn-ExtCtxSetMm.c $ */
/** @file
 * BS3Kit - Bs3ExtCtxSetMm
 */

/*
 * Copyright (C) 2007-2023 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 "bs3kit-template-header.h"


#undef Bs3ExtCtxSetMm
BS3_CMN_DEF(bool, Bs3ExtCtxSetMm,(PBS3EXTCTX pExtCtx, uint8_t iReg, uint64_t uValue, BS3EXTCTXTOPMM enmTop))
{
    AssertCompileMembersAtSameOffset(BS3EXTCTX, Ctx.x87.aRegs, BS3EXTCTX, Ctx.x.x87.aRegs);
    if (iReg < RT_ELEMENTS(pExtCtx->Ctx.x87.aRegs))
        switch (pExtCtx->enmMethod)
        {
            case BS3EXTCTXMETHOD_FXSAVE:
            case BS3EXTCTXMETHOD_XSAVE:
                pExtCtx->Ctx.x87.aRegs[iReg].mmx = uValue;
                if (enmTop == BS3EXTCTXTOPMM_SET || enmTop == BS3EXTCTXTOPMM_ZERO)
                    pExtCtx->Ctx.x87.aRegs[iReg].au16[4] = enmTop == BS3EXTCTXTOPMM_SET ? UINT16_MAX : 0;
                return true;

            case BS3EXTCTXMETHOD_ANCIENT:
                pExtCtx->Ctx.Ancient.regs[iReg].mmx = uValue;
                if (enmTop == BS3EXTCTXTOPMM_SET || enmTop == BS3EXTCTXTOPMM_ZERO)
                    pExtCtx->Ctx.Ancient.regs[iReg].au16[4] = enmTop == BS3EXTCTXTOPMM_SET ? UINT16_MAX : 0;
                return true;
        }
    return false;
}