Mikhail Maltsev c4658abe60 [libcxx] Improve accuracy of complex asinh and acosh ...

Summary:
Currently std::asinh and std::acosh use std::pow to compute x^2. This
results in a significant error when computing e.g. asinh(i) or
acosh(-1).

This patch expresses x^2 directly via x.real() and x.imag(), like it
is done in libstdc++/glibc, and adds tests that checks the accuracy.

Reviewers: EricWF, mclow.lists

Reviewed By: mclow.lists

Subscribers: christof, cfe-commits

Differential Revision: https://reviews.llvm.org/D41629

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@325510 91177308-0d34-0410-b5e6-96231b3b80d8

2018-02-19 15:41:36 +00:00

..

c.math

Placate unused variable warnings uncovered by improvements to clang's -Wunused-variable

2017-10-14 15:52:38 +00:00

cfenv/cfenv.syn

Move remaining _LIBCPP_VERSION tests into test/libcxx

2016-06-22 02:23:22 +00:00

complex.number

[libcxx] Improve accuracy of complex asinh and acosh

2018-02-19 15:41:36 +00:00

numarray

[libcxx] Avoid spurious construction of valarray elements

2018-02-08 11:33:48 +00:00

numeric.ops

Change add_ten to add_one to avoid triggering ubsan integer overflow.

2018-01-08 19:45:16 +00:00

numeric.requirements

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00

numerics.general

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00

rand

Tolerate even more [[nodiscard]] in the STL. Reviewed as https://reviews.llvm.org/D39080

2017-11-15 07:45:07 +00:00

nothing_to_do.pass.cpp

Move test into test/std subdirectory.

2014-12-20 01:40:03 +00:00