Long live the slayer!

Initial commit of OpenGL Runtime to repository.
Based on SHA1 61823aaccc6510699a54b34a2fe3f7523dab3b4e
of qt3dstudio repository.

Task-number: QT3DS-3600
Change-Id: Iaeb80237399f0e5656a19ebec9d1ab3a681d8832
Reviewed-by: Pasi Keränen <pasi.keranen@qt.io>
 

1 files changed, 61 insertions, 0 deletions

diff --git a/src/foundation/windows/Qt3DSWindowsFPU.cpp b/src/foundation/windows/Qt3DSWindowsFPU.cpp
new file mode 100644
index 0000000..4724280
--- /dev/null
+++ b/src/foundation/windows/Qt3DSWindowsFPU.cpp
@@ -0,0 +1,61 @@
+/****************************************************************************
+**
+** Copyright (C) 2008-2012 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "foundation/Qt3DSFPU.h"
+#include "float.h"
+
+#ifdef QT3DS_X64
+#define _MCW_ALL _MCW_DN | _MCW_EM | _MCW_RC
+#else
+#define _MCW_ALL _MCW_DN | _MCW_EM | _MCW_IC | _MCW_RC | _MCW_PC
+#endif
+
+qt3ds::foundation::FPUGuard::FPUGuard()
+{
+// default plus FTZ and DAZ
+#if defined(QT3DS_WINDOWS) && defined(QT3DS_VC)
+#ifdef QT3DS_X64
+    _controlfp_s(mControlWords, _CW_DEFAULT | _DN_FLUSH, _MCW_ALL);
+#else
+    __control87_2(_CW_DEFAULT | _DN_FLUSH, _MCW_ALL, mControlWords, mControlWords + 1);
+#endif
+#endif
+}
+
+qt3ds::foundation::FPUGuard::~FPUGuard()
+{
+#if defined(QT3DS_WINDOWS) && defined(QT3DS_VC)
+#ifdef QT3DS_X64
+    _controlfp_s(mControlWords, *mControlWords, _MCW_ALL);
+#else
+    __control87_2(mControlWords[0], _MCW_ALL, mControlWords, 0);
+    __control87_2(mControlWords[1], _MCW_ALL, 0, mControlWords + 1);
+#endif
+#endif
+}