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@@ -1,7 +1,7 @@ |
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// |
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// Lol Engine |
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// |
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// Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net> |
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// Copyright: (c) 2010-2012 Sam Hocevar <sam@hocevar.net> |
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// This program is free software; you can redistribute it and/or |
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// modify it under the terms of the Do What The Fuck You Want To |
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// Public License, Version 2, as published by Sam Hocevar. See |
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@@ -40,7 +40,8 @@ namespace lol |
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/* Lookup table-based algorithm from “Fast Half Float Conversions” |
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* by Jeroen van der Zijp, November 2008. No rounding is performed, |
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* and some NaN values may be incorrectly converted to Inf. */ |
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* and some NaN values may be incorrectly converted to Inf (because |
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* the lowest order bits in the mantissa are ignored). */ |
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static inline uint16_t float_to_half_nobranch(uint32_t x) |
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{ |
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static uint16_t const basetable[512] = |
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@@ -157,6 +158,7 @@ static inline void float_to_half_vector(half *dst, float const *src) |
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} |
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#endif |
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/* We use this De Bruijn sequence to compute a branchless integer log2 */ |
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static int const shifttable[32] = |
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{ |
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23, 14, 22, 0, 0, 0, 21, 0, 0, 0, 0, 0, 0, 0, 20, 0, |
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sam