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;
+}
+