devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

14
Eigen/src/Core/util/XprHelper.h
View File

@@ -664,6 +664,20 @@ bool is_same_dense(const T1 &, const T2 &, typename enable_if<!(has_direct_acces
return false;
}
// Internal helper defining the cost of a scalar division for the type T.
// The default heuristic can be specialized for each scalar type and architecture.
template<typename T,bool Vectorized=false,typename EnaleIf = void>
struct scalar_div_cost {
enum { value = 8*NumTraits<T>::MulCost };
};
template<bool Vectorized>
struct scalar_div_cost<signed long,Vectorized,typename enable_if<sizeof(long)==8>::type> { enum { value = 24 }; };
template<bool Vectorized>
struct scalar_div_cost<unsigned long,Vectorized,typename enable_if<sizeof(long)==8>::type> { enum { value = 21 }; };
#ifdef EIGEN_DEBUG_ASSIGN
std::string demangle_traversal(int t)
{