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8eab7b6886
eigen/Eigen
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Rasmus Munk Larsen 8eab7b6886 Improve exp<float>(): Don't flush denormal results +4% speedup. 
1. Speed up exp(x) by reducing the polynomial approximant from degree 7 to
degree 6. With exactly representable coefficients computed by the Sollya tool,
this still gives a maximum relative error of 1 ulp, i.e. faithfully rounded, for
arguments where exp(x) is a normalized float. This change results in a speedup
of about 4% for AVX2.


2. Extend the range where exp(x) returns a non-zero result to from ~[-88;88] to
~[-104;88] i.e. return denormalized values for large negative arguments instead
of zero. Compared to exp<double>(x) the denormalized results gradually decrease
in accuracy down to 0.033 relative error for arguments around x = -104 where
exp(x) is ~std::numeric<float>::denorm_min(). This is expected and acceptable.
2021-12-28 15:00:19 +00:00
..
src Improve exp<float>(): Don't flush denormal results +4% speedup. 2021-12-28 15:00:19 +00:00
Cholesky Improved lapacke binding code for HouseholderQR and PartialPivLU 2021-12-02 00:10:58 +00:00
CholmodSupport Update link to suitesparse. 2016-01-27 22:48:40 +01:00
Core Some further cleanup 2021-12-06 18:01:15 +00:00
Dense
Eigen Sparse is stable now, so Eigen/Eigen should include Sparse 2013-10-02 23:31:59 +02:00
Eigenvalues Remove vim specific comments to recognoize correct file-type. 2021-02-09 09:13:09 +01:00
Geometry Remove vim specific comments to recognoize correct file-type. 2021-02-09 09:13:09 +01:00
Householder Remove vim specific comments to recognoize correct file-type. 2021-02-09 09:13:09 +01:00
IterativeLinearSolvers Add missing licence header to some top header files 2015-10-26 11:46:05 +01:00
Jacobi Remove vim specific comments to recognoize correct file-type. 2021-02-09 09:13:09 +01:00
KLUSupport Move KLU support to official 2017-11-10 14:11:22 +01:00
LU Improved lapacke binding code for HouseholderQR and PartialPivLU 2021-12-02 00:10:58 +00:00
MetisSupport Add missing licence header to some top header files 2015-10-26 11:46:05 +01:00
OrderingMethods Remove EIGEN_MPL2_ONLY guards around code re-licensed from LGPL to MPL2 in 2ca1e73239 2019-03-05 10:24:54 -08:00
PardisoSupport Extend CUDA support to matrix inversion and selfadjointeigensolver 2018-06-11 18:33:24 +02:00
PaStiXSupport clarify Pastix requirements 2017-11-27 22:11:57 +01:00
QR Improved lapacke binding code for HouseholderQR and PartialPivLU 2021-12-02 00:10:58 +00:00
QtAlignedMalloc Remove vim specific comments to recognoize correct file-type. 2021-02-09 09:13:09 +01:00
Sparse Remove EIGEN_MPL2_ONLY guards around code re-licensed from LGPL to MPL2 in 2ca1e73239 2019-03-05 10:24:54 -08:00
SparseCholesky Remove EIGEN_MPL2_ONLY guards around code re-licensed from LGPL to MPL2 in 2ca1e73239 2019-03-05 10:24:54 -08:00
SparseCore don't use deprecated MappedSparseMatrix 2021-11-19 15:58:04 +00:00
SparseLU Fix numerous shadow-warnings for GCC<=4.8 2018-08-28 18:32:39 +02:00
SparseQR Old gcc versions have problems with recursive #pragma GCC diagnostic push/pop 2018-08-28 11:44:15 +02:00
SPQRSupport Fix 2021-12-10 16:59:48 +00:00
StdDeque bug #1389: MSVC's std containers do not properly align in 64 bits mode if the requested alignment is larger than 16 bytes (e.g., with AVX) 2017-02-03 15:22:35 +01:00
StdList bug #1389: MSVC's std containers do not properly align in 64 bits mode if the requested alignment is larger than 16 bytes (e.g., with AVX) 2017-02-03 15:22:35 +01:00
StdVector bug #1389: MSVC's std containers do not properly align in 64 bits mode if the requested alignment is larger than 16 bytes (e.g., with AVX) 2017-02-03 15:22:35 +01:00
SuperLUSupport bug #1119: Adjust call to ?gssvx for SuperLU 5 2016-07-10 02:29:57 +02:00
SVD Remove vim specific comments to recognoize correct file-type. 2021-02-09 09:13:09 +01:00
UmfPackSupport Update link to suitesparse. 2016-01-27 22:48:40 +01:00