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Revert vec/y to vec*(1/y) in row-major TRSM:
- div is extremely costly - this is consistent with the column-major case - this is consistent with all other BLAS implementations
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@ -183,7 +183,7 @@ EIGEN_DONT_INLINE void triangular_solve_matrix<Scalar,Index,OnTheLeft,Mode,Conju
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}
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}
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/* Optimized triangular solver with multiple left hand sides and the trinagular matrix on the right
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/* Optimized triangular solver with multiple left hand sides and the triangular matrix on the right
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*/
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template <typename Scalar, typename Index, int Mode, bool Conjugate, int TriStorageOrder>
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struct triangular_solve_matrix<Scalar,Index,OnTheRight,Mode,Conjugate,TriStorageOrder,ColMajor>
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@ -202,6 +202,7 @@ EIGEN_DONT_INLINE void triangular_solve_matrix<Scalar,Index,OnTheRight,Mode,Conj
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level3_blocking<Scalar,Scalar>& blocking)
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{
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Index rows = otherSize;
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typedef typename NumTraits<Scalar>::Real RealScalar;
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typedef blas_data_mapper<Scalar, Index, ColMajor> LhsMapper;
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typedef const_blas_data_mapper<Scalar, Index, TriStorageOrder> RhsMapper;
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@ -306,9 +307,9 @@ EIGEN_DONT_INLINE void triangular_solve_matrix<Scalar,Index,OnTheRight,Mode,Conj
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}
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if((Mode & UnitDiag)==0)
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{
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Scalar b = conj(rhs(j,j));
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Scalar inv_rjj = RealScalar(1)/conj(rhs(j,j));
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for (Index i=0; i<actual_mc; ++i)
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r[i] /= b;
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r[i] *= inv_rjj;
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}
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}
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