diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxGetAbridgedFtw.c')
-rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxGetAbridgedFtw.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxGetAbridgedFtw.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxGetAbridgedFtw.c new file mode 100644 index 00000000..6092f88b --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-ExtCtxGetAbridgedFtw.c @@ -0,0 +1,71 @@ +/* $Id: bs3-cmn-ExtCtxGetAbridgedFtw.c $ */ +/** @file + * BS3Kit - Bs3ExtCtxGetAbridgedFtw + */ + +/* + * 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 Bs3ExtCtxGetAbridgedFtw +BS3_CMN_DEF(uint16_t, Bs3ExtCtxGetAbridgedFtw,(PCBS3EXTCTX pExtCtx)) +{ + AssertCompileMembersAtSameOffset(BS3EXTCTX, Ctx.x87.FTW, BS3EXTCTX, Ctx.x.x87.FTW); + switch (pExtCtx->enmMethod) + { + case BS3EXTCTXMETHOD_FXSAVE: + case BS3EXTCTXMETHOD_XSAVE: + return pExtCtx->Ctx.x87.FTW; + + case BS3EXTCTXMETHOD_ANCIENT: + { + /* iemFpuCompressFtw: */ + uint16_t u16FullFtw = pExtCtx->Ctx.Ancient.FTW; + uint8_t u8Ftw = 0; + unsigned i; + for (i = 0; i < 8; i++) + { + if ((u16FullFtw & 3) != 3 /*empty*/) + u8Ftw |= RT_BIT(i); + u16FullFtw >>= 2; + } + return u8Ftw; + } + } + return 0; +} + |