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bug #1195: move NumTraits::Div<>::Cost to internal::scalar_div_cost (with some specializations in arch/SSE and arch/AVX)

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This commit is contained in:
Gael Guennebaud
2016-09-08 08:36:27 +02:00
parent d780983f59
commit 471eac5399
8 changed files with 39 additions and 27 deletions
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17
Eigen/src/Core/NumTraits.h
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@@ -97,23 +97,6 @@ template<typename T> struct GenericNumTraits
MulCost = 1
};
// Division is messy but important, because it is expensive and throughput
// varies significantly. The following numbers are based on min division
// throughput on Haswell.
template<bool Vectorized>
struct Div {
enum {
#ifdef EIGEN_VECTORIZE_AVX
AVX = true,
#else
AVX = false,
#endif
Cost = IsInteger ? (sizeof(T) == 8 ? (IsSigned ? 24 : 21) : (IsSigned ? 8 : 9)):
Vectorized ? (sizeof(T) == 8 ? (AVX ? 16 : 8) : (AVX ? 14 : 7)) : 8
};
};
typedef T Real;
typedef typename internal::conditional<
IsInteger,