GitHub-Proxy/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2025-06-04 18:54:00 +08:00
Code Issues Packages Projects Releases Wiki Activity

Avoid inefficient 2x2 LU

Browse Source
This commit is contained in:
Chen-Pang He 2012-09-22 22:06:22 +08:00
parent d7b1049cab
commit 7e64f78f65
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
unsupported/Eigen/src/MatrixFunctions/MatrixPower.h
View File

@ -226,7 +226,7 @@ void MatrixPower<MatrixType>::computeIntPower(const PlainObject& b, ResultType&
else if (p>0) {
m_tmp1 = m_A;
}
else if (b.cols() * (pp - applyings) <= m_A.cols() * squarings) {
else if (m_A.cols() > 2 && b.cols()*(pp-applyings) <= m_A.cols()*squarings) {
PartialPivLU<MatrixType> A(m_A);
res = A.solve(b);
for (--pp; pp >= 1; --pp)
@ -237,7 +237,7 @@ void MatrixPower<MatrixType>::computeIntPower(const PlainObject& b, ResultType&
m_tmp1 = m_A.inverse();
}
while (b.cols() * (pp - applyings) > m_A.cols() * squarings) {
while (b.cols()*(pp-applyings) > m_A.cols()*squarings) {
if (std::fmod(pp, 2) >= 1) {
apply(b, res, init);
--applyings;