3
0
mirror of https://github.com/triqs/dft_tools synced 2024-12-25 13:53:40 +01:00
Go to file
Olivier Parcollet b534936589 Fix matrix * alias issue and adapt det_manip
- The previous version of the * operator for matrix was too clever.
It was giving a lazy object and then rewriting C = A *B into gemm (a,A,B,0,C).
The pb was in case of aliasing : when e.g. C = A, or is a part of A.
gemm is not correct that case, and as a result generic code like
a = a *b
may not be correct in matrix case, which is unacceptable.

- So we revert to a simple * operator for matrix
that does immediate computation.
Same thing for matrix* vector

- we also suppress a_x_ty class.

-> for M = a * b,
when M is a matrix, there is no overhead due to move assignment
-> however, when M is a view, there is an additionnal copy.

-Correctness comes first, hence the fix.
However, if one wants more speed and one can guarantee that
there is no aliasing possible, then one has to write a direct gemm call.

-> det_manip class was adapted, since in that case, we can show there
no alias, and we want the speed gain, so the * ops where replaced
by direct blas call (using the array blas interface).

-> also gemm, gemv, ger were overloaded in the case the return
matrix/vector (i.e. last parameter of the function) is not an lvalue,
but a temporary view created on the fly.
2013-09-11 18:49:22 +02:00
cmake Fix cmake so that -DMATHJAX_PATH works 2013-09-09 14:49:15 +02:00
doc Work on doc 2013-09-11 18:38:18 +02:00
examples/simple First commit : triqs libs version 1.0 alpha1 2013-07-17 19:24:07 +02:00
foreignlibs Get rid of boost compilation from sources 2013-09-02 14:26:32 +02:00
packaging/os_x brew formula for triqs and an application ok 2013-09-02 21:25:43 +02:00
pytriqs Fix BZPatch class and partial DOS computation 2013-09-05 17:55:18 +02:00
shells Better name for run_pytriqs_for_test 2013-08-02 10:15:05 +02:00
test Fix matrix * alias issue and adapt det_manip 2013-09-11 18:49:22 +02:00
triqs Fix matrix * alias issue and adapt det_manip 2013-09-11 18:49:22 +02:00
CITATIONS.bib First commit : triqs libs version 1.0 alpha1 2013-07-17 19:24:07 +02:00
CMakeLists.txt Fix #8 2013-09-11 14:48:05 +02:00
COPYING.txt First commit : triqs libs version 1.0 alpha1 2013-07-17 19:24:07 +02:00
different_moves.ipynb test/triqs/mc_tools directory added, with an example of simple random walker 2013-09-09 15:41:46 +02:00
LICENSE.txt First commit : triqs libs version 1.0 alpha1 2013-07-17 19:24:07 +02:00
README.txt First commit : triqs libs version 1.0 alpha1 2013-07-17 19:24:07 +02:00

 
The TRIQS website is under http://ipht.cea.fr/triqs. Start there
to learn about TRIQS.

To install TRIQS, follow the installation steps given under
http://ipht.cea.fr/triqs/doc/user_manual/install/install.html

Before you proceed, make sure you have read the LICENSE.txt file.

Enjoy!

The TRIQS team