Opencl gumbel and logistic (lc)cdf

[t4c1]

Summary

Added OpenCL implementations for functions gumbel_cdf, gumbel_lcdf, gumbel_lccdf, logistic_cdf, logistic_lcdf and logistic_lccdf.

Tests

New functions are tested.

Side Effects

None.

Release notes

OpenCL: Added OpenCL implementations for functions gumbel_cdf, gumbel_lcdf, gumbel_lccdf, logistic_cdf, logistic_lcdf and logistic_lccdf.

Checklist

• Math issue Add OpenCL distributions #2152

• Copyright holder: Tadej Ciglarič

  The copyright holder is typically you or your assignee, such as a university or company. By submitting this pull request, the copyright holder is agreeing to the license the submitted work under the following licenses:
  - Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
  - Documentation: CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

• the basic tests are passing

  • unit tests pass (to run, use: ./runTests.py test/unit)
  • header checks pass, (make test-headers)
  • dependencies checks pass, (make test-math-dependencies)
  • docs build, (make doxygen)
  • code passes the built in C++ standards checks (make cpplint)

• the code is written in idiomatic C++ and changes are documented in the doxygen

• the new changes are tested

[stan-buildbot]

---

Name	Old Result	New Result	Ratio	Performance change( 1 - new / old )
gp_pois_regr/gp_pois_regr.stan	3.39	3.34	1.02	1.57% faster
low_dim_corr_gauss/low_dim_corr_gauss.stan	0.02	0.02	1.06	5.83% faster
eight_schools/eight_schools.stan	0.11	0.11	1.0	0.22% faster
gp_regr/gp_regr.stan	0.16	0.16	0.98	-2.03% slower
irt_2pl/irt_2pl.stan	5.39	5.4	1.0	-0.24% slower
performance.compilation	90.74	88.93	1.02	1.99% faster
low_dim_gauss_mix_collapse/low_dim_gauss_mix_collapse.stan	8.63	8.64	1.0	-0.04% slower
pkpd/one_comp_mm_elim_abs.stan	30.3	30.17	1.0	0.44% faster
sir/sir.stan	132.72	127.98	1.04	3.57% faster
gp_regr/gen_gp_data.stan	0.04	0.04	0.99	-0.54% slower
low_dim_gauss_mix/low_dim_gauss_mix.stan	3.05	3.05	1.0	-0.26% slower
pkpd/sim_one_comp_mm_elim_abs.stan	0.4	0.38	1.06	5.35% faster
arK/arK.stan	1.99	2.01	0.99	-1.08% slower
arma/arma.stan	0.63	0.63	1.0	-0.42% slower
garch/garch.stan	0.51	0.51	0.99	-0.61% slower
Mean result: 1.00978748312

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Jenkins Console Log
Blue Ocean
Commit hash: 2f75070

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Machine information

ProductName: Mac OS X ProductVersion: 10.11.6 BuildVersion: 15G22010

CPU:
Intel(R) Xeon(R) CPU E5-1680 v2 @ 3.00GHz

G++:
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.6.0
Thread model: posix

Clang:
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.6.0
Thread model: posix