Remove the old v4 and rename v4vm to v4

For archeologists v4 can still be found in the history. Otherwise
it is confusing to have both engines in the tree.

Change-Id: Ice05afb7013f0fe536aab6bb19114f696c58fc94
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/src/qml/qml/v4/qv4math_p.h b/src/qml/qml/v4/qv4math_p.h
new file mode 100644
index 0000000000..2460c048ed
--- /dev/null
+++ b/src/qml/qml/v4/qv4math_p.h
@@ -0,0 +1,118 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the V4VM 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QMLJS_MATH_H
+#define QMLJS_MATH_H
+
+#ifndef QMLJS_LLVM_RUNTIME
+#  include <QtCore/qnumeric.h>
+#endif // QMLJS_LLVM_RUNTIME
+#include <cmath>
+
+#if !defined(QMLJS_LLVM_RUNTIME) && defined(Q_CC_GCC) && defined(Q_PROCESSOR_X86)
+#define QMLJS_INLINE_MATH
+#define QMLJS_READONLY __attribute((const))
+#endif
+
+#if defined(QMLJS_INLINE_MATH)
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+
+static inline QMLJS_READONLY Value add_int32(int a, int b)
+{
+    quint8 overflow = 0;
+    int aa = a;
+
+    asm ("addl %2, %1\n"
+         "seto %0"
+    : "=q" (overflow), "=r" (aa)
+         : "r" (b), "1" (aa)
+         : "cc"
+    );
+    if (!overflow)
+        return Value::fromInt32(aa);
+    return Value::fromDouble((double)a + (double)b);
+}
+
+static inline QMLJS_READONLY Value sub_int32(int a, int b)
+{
+    quint8 overflow = 0;
+    int aa = a;
+
+    asm ("subl %2, %1\n"
+         "seto %0"
+    : "=q" (overflow), "=r" (aa)
+         : "r" (b), "1" (aa)
+         : "cc"
+    );
+    if (!overflow)
+        return Value::fromInt32(aa);
+    return Value::fromDouble((double)a - (double)b);
+}
+
+static inline QMLJS_READONLY Value mul_int32(int a, int b)
+{
+    quint8 overflow = 0;
+    int aa = a;
+
+    asm ("imul %2, %1\n"
+         "setc %0"
+         : "=q" (overflow), "=r" (aa)
+         : "r" (b), "1" (aa)
+         : "cc"
+    );
+    if (!overflow)
+        return Value::fromInt32(aa);
+    return Value::fromDouble((double)a * (double)b);
+}
+
+}
+
+QT_END_NAMESPACE
+
+#endif // defined(QMLJS_INLINE_MATH)
+
+#ifdef QMLJS_READONLY
+#undef QMLJS_READONLY
+#endif
+
+#endif // QMLJS_MATH_H