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| 105 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
105 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
| 106 | |
106 | |
| 107 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
107 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
| 108 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
108 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
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109 | |
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110 | // sign returns -1 or +1 |
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111 | template<typename T> |
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112 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
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113 | // relies on 2c representation |
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114 | template<> |
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115 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
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116 | |
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117 | // sign0 returns -1, 0 or +1 |
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118 | template<typename T> |
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119 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
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120 | |
| 110 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
121 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
| 111 | template<typename T> static inline T div (T val, T div) { return (val + div / 2) / div; } |
122 | template<typename T> static inline T div (T val, T div) { return (val + div / 2) / div; } |
| 112 | // div, round-up |
123 | // div, round-up |
| 113 | template<typename T> static inline T div_ru (T val, T div) { return (val + div - 1) / div; } |
124 | template<typename T> static inline T div_ru (T val, T div) { return (val + div - 1) / div; } |
| 114 | // div, round-down |
125 | // div, round-down |
