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Diffstat (limited to 'src/corelib/global/qfloat16_p.h')
-rw-r--r-- | src/corelib/global/qfloat16_p.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/corelib/global/qfloat16_p.h b/src/corelib/global/qfloat16_p.h new file mode 100644 index 0000000000..ae52e64435 --- /dev/null +++ b/src/corelib/global/qfloat16_p.h @@ -0,0 +1,95 @@ +/**************************************************************************** +** +** Copyright (C) 2016 by Southwest Research Institute (R) +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or 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.GPL2 and 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-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QFLOAT16_P_H +#define QFLOAT16_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <QtCore/qfloat16.h> +#include <QtCore/qsysinfo.h> + +QT_BEGIN_NAMESPACE + +static inline bool qt_is_inf(qfloat16 d) Q_DECL_NOTHROW +{ + bool is_inf; + uchar *ch = (uchar *)&d; + if (QSysInfo::ByteOrder == QSysInfo::BigEndian) + is_inf = (ch[0] & 0x7c) == 0x7c; + else + is_inf = (ch[1] & 0x7c) == 0x7c; + return is_inf; +} + +static inline bool qt_is_nan(qfloat16 d) Q_DECL_NOTHROW +{ + bool is_nan; + uchar *ch = (uchar *)&d; + if (QSysInfo::ByteOrder == QSysInfo::BigEndian) + is_nan = (ch[0] & 0x7c) == 0x7c && (ch[0] & 0x02) != 0; + else + is_nan = (ch[1] & 0x7c) == 0x7c && (ch[1] & 0x02) != 0; + return is_nan; +} + +static inline bool qt_is_finite(qfloat16 d) Q_DECL_NOTHROW +{ + bool is_finite; + uchar *ch = (uchar *)&d; + if (QSysInfo::ByteOrder == QSysInfo::BigEndian) + is_finite = (ch[0] & 0x7c) != 0x7c; + else + is_finite = (ch[1] & 0x7c) != 0x7c; + return is_finite; +} + + +QT_END_NAMESPACE + +#endif // QFLOAT16_P_H |