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Fallback to Block<> when possible (Index, all, seq with > increment).

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This is important to take advantage of the optimized implementations (evaluator, products, etc.),
and to support sparse matrices.
This commit is contained in:
Gael Guennebaud
2017-01-10 14:25:30 +01:00
parent a98c7efb16
commit 87963f441c
4 changed files with 53 additions and 3 deletions
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6
Eigen/src/Core/IndexedView.h
View File

@@ -38,6 +38,9 @@ struct traits<IndexedView<XprType, RowIndices, ColIndices> >
XprInnerStride = HasSameStorageOrderAsXprType ? int(inner_stride_at_compile_time<XprType>::ret) : int(outer_stride_at_compile_time<XprType>::ret),
XprOuterstride = HasSameStorageOrderAsXprType ? int(outer_stride_at_compile_time<XprType>::ret) : int(inner_stride_at_compile_time<XprType>::ret),
IsBlockAlike = InnerIncr==1 && OuterIncr==1,
IsInnerPannel = HasSameStorageOrderAsXprType && is_same<AllRange,typename conditional<XprTypeIsRowMajor,ColIndices,RowIndices>::type>::value,
InnerStrideAtCompileTime = InnerIncr<0 || InnerIncr==DynamicIndex || XprInnerStride==Dynamic ? Dynamic : XprInnerStride * InnerIncr,
OuterStrideAtCompileTime = OuterIncr<0 || OuterIncr==DynamicIndex || XprOuterstride==Dynamic ? Dynamic : XprOuterstride * OuterIncr,
@@ -48,8 +51,11 @@ struct traits<IndexedView<XprType, RowIndices, ColIndices> >
FlagsLvalueBit = is_lvalue<XprType>::value ? LvalueBit : 0,
Flags = (traits<XprType>::Flags & (HereditaryBits | DirectAccessMask)) | FlagsLvalueBit | FlagsRowMajorBit
};
typedef Block<XprType,RowsAtCompileTime,ColsAtCompileTime,IsInnerPannel> BlockType;
};
}
template<typename XprType, typename RowIndices, typename ColIndices, typename StorageKind>