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Favor column major storage for inner products

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This commit is contained in:
Gael Guennebaud
2014-09-14 19:38:49 +02:00
parent 26db954776
commit c83e01f2d6
3 changed files with 12 additions and 10 deletions
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4
Eigen/src/Core/AssignEvaluator.h
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@@ -55,8 +55,8 @@ private:
};
enum {
DstIsRowMajor = DstEvaluator::Flags&RowMajorBit,
SrcIsRowMajor = SrcEvaluator::Flags&RowMajorBit,
DstIsRowMajor = DstFlags&RowMajorBit,
SrcIsRowMajor = SrcFlags&RowMajorBit,
StorageOrdersAgree = (int(DstIsRowMajor) == int(SrcIsRowMajor)),
MightVectorize = StorageOrdersAgree
&& (int(DstFlags) & int(SrcFlags) & ActualPacketAccessBit)

2
Eigen/src/Core/Product.h
View File

@@ -85,7 +85,7 @@ struct traits<Product<Lhs, Rhs, Option> >
#endif
// The storage order is somewhat arbitrary here. The correct one will be determined through the evaluator.
Flags = ( MaxRowsAtCompileTime==1
Flags = ( (MaxRowsAtCompileTime==1 && MaxColsAtCompileTime!=1)
|| ((LhsTraits::Flags&NoPreferredStorageOrderBit) && (RhsTraits::Flags&RowMajorBit))
|| ((RhsTraits::Flags&NoPreferredStorageOrderBit) && (LhsTraits::Flags&RowMajorBit)) )
? RowMajorBit : (MaxColsAtCompileTime==1 ? 0 : NoPreferredStorageOrderBit)