portelli/Grid
1
0
Fork 0
mirror of https://github.com/paboyle/Grid.git synced 2025-04-09 13:40:46 +01:00
Code Releases Activity

IfGridTensor shorthand

Browse Source
This commit is contained in:
Peter Boyle 2023-10-13 17:56:47 +03:00
parent ffc0639cb9
commit e936f5b80b
2 changed files with 35 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
Grid/tensors/Tensor_trace.h
View File

@ -69,6 +69,35 @@ accelerator_inline auto trace(const iVector<vtype,N> &arg) -> iVector<decltype(t
} }
return ret; return ret;
} }
////////////////////////////
// Fast path traceProduct
////////////////////////////
template<class S1 , class S2, IfNotGridTensor<S1> = 0, IfNotGridTensor<S2> = 0>
accelerator_inline auto traceProduct( const S1 &arg1,const S2 &arg2)
-> decltype(arg1*arg2)
{
return arg1*arg2;
}
template<class vtype,class rtype,int N >
accelerator_inline auto traceProduct(const iMatrix<vtype,N> &arg1,const iMatrix<rtype,N> &arg2) -> iScalar<decltype(trace(arg1._internal[0][0]*arg2._internal[0][0]))>
{
iScalar<decltype( trace(arg1._internal[0][0]*arg2._internal[0][0] )) > ret;
zeroit(ret._internal);
for(int i=0;i<N;i++){
for(int j=0;j<N;j++){
ret._internal=ret._internal+traceProduct(arg1._internal[i][j],arg2._internal[j][i]);
}}
return ret;
}
template<class vtype,class rtype >
accelerator_inline auto traceProduct(const iScalar<vtype> &arg1,const iScalar<rtype> &arg2) -> iScalar<decltype(trace(arg1._internal*arg2._internal))>
{
iScalar<decltype(trace(arg1._internal*arg2._internal))> ret;
ret._internal=traceProduct(arg1._internal,arg2._internal);
return ret;
}
NAMESPACE_END(Grid); NAMESPACE_END(Grid);

9
Grid/tensors/Tensor_traits.h
View File

@ -34,9 +34,12 @@ NAMESPACE_BEGIN(Grid);
// These are the Grid tensors // These are the Grid tensors
template<typename T> struct isGridTensor : public std::false_type { static constexpr bool notvalue = true; }; template<typename T> struct isGridTensor : public std::false_type { static constexpr bool notvalue = true; };
template<class T> struct isGridTensor<iScalar<T>> : public std::true_type { static constexpr bool notvalue = false; }; template<class T> struct isGridTensor<iScalar<T> > : public std::true_type { static constexpr bool notvalue = false; };
template<class T, int N> struct isGridTensor<iVector<T, N>> : public std::true_type { static constexpr bool notvalue = false; }; template<class T, int N> struct isGridTensor<iVector<T, N> >: public std::true_type { static constexpr bool notvalue = false; };
template<class T, int N> struct isGridTensor<iMatrix<T, N>> : public std::true_type { static constexpr bool notvalue = false; }; template<class T, int N> struct isGridTensor<iMatrix<T, N> >: public std::true_type { static constexpr bool notvalue = false; };
template <typename T> using IfGridTensor = Invoke<std::enable_if<isGridTensor<T>::value, int> >;
template <typename T> using IfNotGridTensor = Invoke<std::enable_if<!isGridTensor<T>::value, int> >;
// Traits to identify scalars // Traits to identify scalars
template<typename T> struct isGridScalar : public std::false_type { static constexpr bool notvalue = true; }; template<typename T> struct isGridScalar : public std::false_type { static constexpr bool notvalue = true; };