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Add special functions to Eigen: lgamma, erf, erfc.

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Includes CUDA support and unit tests.
This commit is contained in:
Eugene Brevdo
2015-12-07 15:24:49 -08:00
parent 7dfe75f445
commit fa4f933c0f
14 changed files with 513 additions and 1 deletions
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37
Eigen/src/Core/arch/CUDA/MathFunctions.h
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@@ -66,6 +66,43 @@ double2 prsqrt<double2>(const double2& a)
return make_double2(rsqrt(a.x), rsqrt(a.y));
}
template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
float4 plgamma<float4>(const float4& a)
{
return make_float4(lgammaf(a.x), lgammaf(a.y), lgammaf(a.z), lgammaf(a.w));
}
template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
double2 plgamma<double2>(const double2& a)
{
return make_double2(lgamma(a.x), lgamma(a.y));
}
template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
float4 perf<float4>(const float4& a)
{
return make_float4(erf(a.x), erf(a.y), erf(a.z), erf(a.w));
}
template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
double2 perf<double2>(const double2& a)
{
return make_double2(erf(a.x), erf(a.y));
}
template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
float4 perfc<float4>(const float4& a)
{
return make_float4(erfc(a.x), erfc(a.y), erfc(a.z), erfc(a.w));
}
template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE
double2 perfc<double2>(const double2& a)
{
return make_double2(erfc(a.x), erfc(a.y));
}
#endif
} // end namespace internal

6
Eigen/src/Core/arch/CUDA/PacketMath.h
View File

@@ -39,6 +39,9 @@ template<> struct packet_traits<float> : default_packet_traits
HasExp = 1,
HasSqrt = 1,
HasRsqrt = 1,
HasLGamma = 1,
HasErf = 1,
HasErfc = 1,
HasBlend = 0,
};
@@ -59,6 +62,9 @@ template<> struct packet_traits<double> : default_packet_traits
HasExp = 1,
HasSqrt = 1,
HasRsqrt = 1,
HasLGamma = 1,
HasErf = 1,
HasErfc = 1,
HasBlend = 0,
};