57 Commits

Author	SHA1	Message	Date
Gael Guennebaud	62bf0bbd59	fix a bug in determinant of 4x4 matrices and a small type issue in Inverse	2008-04-26 08:56:52 +00:00
Benoit Jacob	6ae037dfb5	give up on OpenMP... for now	2008-04-18 07:57:46 +00:00
Benoit Jacob	acfd6f3bda	- add _packetCoeff() to Inverse, allowing vectorization. ... - let Inverse take template parameter MatrixType instead of ExpressionType, in order to reduce executable code size when taking inverses of xpr's. - introduce ei_corrected_matrix_flags : the flags template parameter to the Matrix class is only a suggestion. This is also useful in ei_eval.	2008-04-16 07:18:27 +00:00
Benoit Jacob	43e2bc14fe	+5% optimization in 4x4 inverse: ... -only evaluate block expressions for which that is beneficial -don't check for invertibility unless requested	2008-04-15 20:39:27 +00:00
Benoit Jacob	6747b45ae7	for 4x4 matrices implement the special algorithm that Markos proposed, ... falling back to the general algorithm in the bad case.	2008-04-15 20:15:36 +00:00
Benoit Jacob	2a86f052a5	- optimized determinant calculations for small matrices (size <= 4) ... (only 30 muls for size 4) - rework the matrix inversion: now using cofactor technique for size<=3, so the ugly unrolling is only used for size 4 anymore, and even there I'm looking to get rid of it.	2008-04-14 17:07:12 +00:00
Benoit Jacob	ea3ccb1e8c	* Start of the LU module, with matrix inversion already there and ... fully optimized. * Even if LargeBit is set, only parallelize for large enough objects (controlled by EIGEN_PARALLELIZATION_TRESHOLD).	2008-04-14 08:20:24 +00:00