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Try to avoid modulo operations in Replicate if possible.

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This commit is contained in:
Hauke Heibel 2010-03-13 14:33:39 +01:00
parent b9644f3323
commit fc20e6fd55
1 changed files with 9 additions and 2 deletions
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7
Eigen/src/Array/Replicate.h
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@ -90,6 +90,13 @@ template<typename MatrixType,int RowFactor,int ColFactor> class Replicate
inline Scalar coeff(int row, int col) const
{
// try to avoid using modulo; this is a pure optimization strategy
// - it is assumed unlikely that RowFactor==1 && ColFactor==1
if (RowFactor==1)
return m_matrix.coeff(m_matrix.rows(), col%m_matrix.cols());
else if (ColFactor==1)
return m_matrix.coeff(row%m_matrix.rows(), m_matrix.cols());
else
return m_matrix.coeff(row%m_matrix.rows(), col%m_matrix.cols());
}