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Rasmus Munk Larsen cdd8fdc32e Vectorize pow(x, y). This closes https://gitlab.com/libeigen/eigen/-/issues/2085, which also contains a description of the algorithm. 
I ran some testing (comparing to `std::pow(double(x), double(y)))` for `x` in the set of all (positive) floats in the interval `[std::sqrt(std::numeric_limits<float>::min()), std::sqrt(std::numeric_limits<float>::max())]`, and `y` in `{2, sqrt(2), -sqrt(2)}` I get the following error statistics:

```
max_rel_error = 8.34405e-07
rms_rel_error = 2.76654e-07
```

If I widen the range to all normal float I see lower accuracy for arguments where the result is subnormal, e.g. for `y = sqrt(2)`:

```
max_rel_error = 0.666667
rms = 6.8727e-05
count = 1335165689
argmax = 2.56049e-32, 2.10195e-45 != 1.4013e-45
```

which seems reasonable, since these results are subnormals with only couple of significant bits left.
2021-01-18 13:25:16 +00:00
bench Fix #1911: add benchmark for move semantics with fixed-size matrix 2020-06-11 23:43:25 +00:00
blas STYLE: Remove CMake-language block-end command arguments 2019-10-31 11:36:27 -05:00
ci Add CI configuration for ppc64le 2020-09-22 00:26:23 +00:00
cmake check for include dirs set 2020-11-26 10:22:46 +00:00
debug MIsc. source and comment typos 2018-03-11 10:01:44 -04:00
demos Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
doc Fix typo in doc 2020-11-30 10:53:29 +00:00
Eigen Vectorize pow(x, y). This closes https://gitlab.com/libeigen/eigen/-/issues/2085, which also contains a description of the algorithm. 2021-01-18 13:25:16 +00:00
failtest Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
lapack Remove code checking for CMake < 3.5 2020-12-14 09:57:44 +00:00
scripts Replace calls to "hg" by calls to "git" 2019-12-04 11:24:06 +01:00
test Vectorize pow(x, y). This closes https://gitlab.com/libeigen/eigen/-/issues/2085, which also contains a description of the algorithm. 2021-01-18 13:25:16 +00:00
unsupported fix paddings of TensorVolumePatchOp 2021-01-15 11:51:49 +08:00
.gitignore New CI infrastructure, including AArch64 runners 2020-09-11 18:11:49 +00:00
.gitlab-ci.yml New CI infrastructure, including AArch64 runners 2020-09-11 18:11:49 +00:00
.hgeol Added a pattern which forces LF line endings for *.sh files. 2013-07-31 18:20:58 +02:00
CMakeLists.txt Remove code checking for CMake < 3.5 2020-12-14 09:57:44 +00:00
COPYING.APACHE Add Apache 2.0 license text in COPYING.APACHE. 2020-06-18 12:45:27 -07:00
COPYING.BSD Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
COPYING.GPL there's no reason why we should follow the FSF's stupid recommendation for the naming of these files, right? This could give the wrong impression that Eigen is only GPL-licensed. 2009-11-14 23:26:07 -05:00
COPYING.LGPL Replace COPYING.LGPL by a copy of the LGPL 2.1 (instead of LGPL 3). 2012-09-10 13:27:44 -04:00
COPYING.MINPACK Make file formatting comply with POSIX and Unix standards 2020-03-23 18:09:02 +00:00
COPYING.MPL2 add COPYING.MPL2 2012-07-15 10:20:59 -04:00
COPYING.README Replace COPYING.LGPL by a copy of the LGPL 2.1 (instead of LGPL 3). 2012-09-10 13:27:44 -04:00
CTestConfig.cmake STYLE: Convert CMake-language commands to lower case 2019-10-31 11:36:37 -05:00
CTestCustom.cmake.in Allow to filter out build-error messages 2018-07-24 20:12:49 +02:00
eigen3.pc.in Further fixes for CMAKE_INSTALL_PREFIX correctness 2015-11-07 21:29:24 -05:00
INSTALL finally, the right fix: set CTEST_BUILD_TARGET. 2009-10-04 20:27:44 -04:00
README.md Update old links to bitbucket to point to gitlab.com 2019-12-04 10:57:07 +01:00
signature_of_eigen3_matrix_library improve the scripts for building unit tests: 2009-11-25 21:26:37 -05:00

README.md

Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.

For more information go to http://eigen.tuxfamily.org/.

For pull request, bug reports, and feature requests, go to https://gitlab.com/libeigen/eigen.