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Optimization: enable cache-efficient application of HouseholderSequence.

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This commit is contained in:
Gael Guennebaud
2014-09-04 09:15:59 +02:00
parent 80993b95d3
commit 8846aa6d1b
4 changed files with 89 additions and 28 deletions
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6
Eigen/src/QR/HouseholderQR.h
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@@ -299,8 +299,8 @@ struct householder_qr_inplace_blocked
for (k = 0; k < size; k += blockSize)
{
Index bs = (std::min)(size-k,blockSize); // actual size of the block
Index tcols = cols - k - bs; // trailing columns
Index brows = rows-k; // rows of the block
Index tcols = cols - k - bs; // trailing columns
Index brows = rows-k; // rows of the block
// partition the matrix:
// A00 | A01 | A02
@@ -318,7 +318,7 @@ struct householder_qr_inplace_blocked
if(tcols)
{
BlockType A21_22 = mat.block(k,k+bs,brows,tcols);
apply_block_householder_on_the_left(A21_22,A11_21,hCoeffsSegment.adjoint());
apply_block_householder_on_the_left(A21_22,A11_21,hCoeffsSegment, false); // false == backward
}
}
}