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updated ULP extension

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This commit is contained in:
Christophe Riccio 2011-03-07 09:56:48 +00:00
parent 0990ac4583
commit 84fef7d988
1 changed files with 58 additions and 4 deletions
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62
glm/gtx/ulp.inl
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@ -15,13 +15,14 @@ namespace ulp
{ {
inline std::size_t ulp inline std::size_t ulp
( (
double const & a, half const & a,
double const & b half const & b
) )
{ {
std::size_t Count = 0; std::size_t Count = 0;
double Temp = a; float TempA = a;
while((Temp = nextafterf(Temp, b)) != b) float TempB = b;
while((TempA = nextafterf(TempA, TempB)) != TempB)
++Count; ++Count;
return Count; return Count;
} }
@ -38,6 +39,59 @@ namespace ulp
++Count; ++Count;
return Count; return Count;
} }
inline std::size_t ulp
(
double const & a,
double const & b
)
{
std::size_t Count = 0;
double Temp = a;
while((Temp = nextafter(Temp, b)) != b)
++Count;
return Count;
}
template <typename valType>
inline detail::xvec2<valType> ulp
(
detail::xvec2<valType> const & a,
detail::xvec2<valType> const & b
)
{
return detail::xvec2<valType>(
ulp(a[0], b[0]),
ulp(a[1], b[1]));
}
template <typename valType>
inline detail::xvec3<valType> ulp
(
detail::xvec3<valType> const & a,
detail::xvec3<valType> const & b
)
{
return detail::xvec2<valType>(
ulp(a[0], b[0]),
ulp(a[1], b[1]),
ulp(a[2], b[2]));
}
template <typename valType>
inline detail::xvec4<valType> ulp
(
detail::xvec4<valType> const & a,
detail::xvec4<valType> const & b
)
{
return detail::xvec2<valType>(
ulp(a[0], b[0]),
ulp(a[1], b[1]),
ulp(a[2], b[2]),
ulp(a[3], b[3]));
}
}//namespace ulp }//namespace ulp
}//namespace gtx }//namespace gtx
}//namespace glm }//namespace glm