| … | |
… | |
| 99 | |
99 | |
| 100 | // sign0 returns -1, 0 or +1 |
100 | // sign0 returns -1, 0 or +1 |
| 101 | template<typename T> |
101 | template<typename T> |
| 102 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
102 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
| 103 | |
103 | |
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104 | template<typename T, typename U> |
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105 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
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106 | |
| 104 | // div* only work correctly for div > 0 |
107 | // div* only work correctly for div > 0 |
| 105 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
108 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
| 106 | template<typename T> static inline T div (T val, T div) |
109 | template<typename T> static inline T div (T val, T div) |
| 107 | { |
110 | { |
| 108 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
111 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
