1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QMLJS_MATH_H
#define QMLJS_MATH_H
#include <qglobal.h>
#include <QtCore/qnumeric.h>
#include <cmath>
#if defined(Q_CC_GNU)
#define QMLJS_READONLY __attribute((const))
#else
#define QMLJS_READONLY
#endif
QT_BEGIN_NAMESPACE
namespace QV4 {
#if defined(Q_CC_GNU) && defined(Q_PROCESSOR_X86)
static inline QMLJS_READONLY ReturnedValue 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 (Q_UNLIKELY(overflow))
return Primitive::fromDouble(static_cast<double>(a) + b).asReturnedValue();
return Primitive::fromInt32(aa).asReturnedValue();
}
static inline QMLJS_READONLY ReturnedValue 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 (Q_UNLIKELY(overflow))
return Primitive::fromDouble(static_cast<double>(a) - b).asReturnedValue();
return Primitive::fromInt32(aa).asReturnedValue();
}
static inline QMLJS_READONLY ReturnedValue 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 (Q_UNLIKELY(overflow))
return Primitive::fromDouble(static_cast<double>(a) * b).asReturnedValue();
return Primitive::fromInt32(aa).asReturnedValue();
}
#else
static inline QMLJS_READONLY ReturnedValue add_int32(int a, int b)
{
qint64 result = static_cast<qint64>(a) + b;
if (Q_UNLIKELY(result > INT_MAX || result < INT_MIN))
return Primitive::fromDouble(static_cast<double>(a) + b).asReturnedValue();
return Primitive::fromInt32(static_cast<int>(result)).asReturnedValue();
}
static inline QMLJS_READONLY ReturnedValue sub_int32(int a, int b)
{
qint64 result = static_cast<qint64>(a) - b;
if (Q_UNLIKELY(result > INT_MAX || result < INT_MIN))
return Primitive::fromDouble(static_cast<double>(a) - b).asReturnedValue();
return Primitive::fromInt32(static_cast<int>(result)).asReturnedValue();
}
static inline QMLJS_READONLY ReturnedValue mul_int32(int a, int b)
{
qint64 result = static_cast<qint64>(a) * b;
if (Q_UNLIKELY(result > INT_MAX || result < INT_MIN))
return Primitive::fromDouble(static_cast<double>(a) * b).asReturnedValue();
return Primitive::fromInt32(static_cast<int>(result)).asReturnedValue();
}
#endif
}
QT_END_NAMESPACE
#ifdef QMLJS_READONLY
#undef QMLJS_READONLY
#endif
#endif // QMLJS_MATH_H
|
