/usr/include/libwildmagic/Wm5BitHacks.inl is in libwildmagic-dev 5.13-1ubuntu3.
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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 | // Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.0 (2010/01/01)
//----------------------------------------------------------------------------
inline int ScaledFloatToInt (float value, int power)
{
int result;
int shift = 150 - power - ((*(int*)(&value) >> 23) & 0xFF);
if (shift < 24)
{
result = ((*(int*)(&value) & 0x007FFFFF) | 0x00800000) >> shift;
if (result == (1 << power))
{
--result;
}
}
else
{
result = 0;
}
return result;
}
//----------------------------------------------------------------------------
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