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39 #ifndef QMLJS_MATH_H
40 #define QMLJS_MATH_H
41
42 //
43 // W A R N I N G
44 // -------------
45 //
46 // This file is not part of the Qt API. It exists purely as an
47 // implementation detail. This header file may change from version to
48 // version without notice, or even be removed.
49 //
50 // We mean it.
51 //
52
53 #include <qglobal.h>
54
55 #include <private/qv4staticvalue_p.h>
56 #include <QtCore/qnumeric.h>
57 #include <QtCore/private/qnumeric_p.h>
58 #include <cmath>
59
60 #if defined(Q_CC_GNU)
61 #define QMLJS_READONLY __attribute((const))
62 #else
63 #define QMLJS_READONLY
64 #endif
65
66 QT_BEGIN_NAMESPACE
67
68 namespace QV4 {
69
add_int32(int a,int b)70 static inline QMLJS_READONLY ReturnedValue add_int32(int a, int b)
71 {
72 int result;
73 if (Q_UNLIKELY(add_overflow(a, b, &result)))
74 return StaticValue::fromDouble(static_cast<double>(a) + b).asReturnedValue();
75 return StaticValue::fromInt32(result).asReturnedValue();
76 }
77
sub_int32(int a,int b)78 static inline QMLJS_READONLY ReturnedValue sub_int32(int a, int b)
79 {
80 int result;
81 if (Q_UNLIKELY(sub_overflow(a, b, &result)))
82 return StaticValue::fromDouble(static_cast<double>(a) - b).asReturnedValue();
83 return StaticValue::fromInt32(result).asReturnedValue();
84 }
85
mul_int32(int a,int b)86 static inline QMLJS_READONLY ReturnedValue mul_int32(int a, int b)
87 {
88 int result;
89 if (Q_UNLIKELY(mul_overflow(a, b, &result)))
90 return StaticValue::fromDouble(static_cast<double>(a) * b).asReturnedValue();
91 return StaticValue::fromInt32(result).asReturnedValue();
92 }
93
94 }
95
96 QT_END_NAMESPACE
97
98 #ifdef QMLJS_READONLY
99 #undef QMLJS_READONLY
100 #endif
101
102 #endif // QMLJS_MATH_H
103