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
r283051 added some functions to cmath (in namespace std) that have the
same name as functions in math.h (in the global namespace). Clang's
limited support for `-fdelayed-template-parsing` chokes on this. Rename
the ones in `cmath` and their uses in `complex` and the test.
rdar://problem/32848355
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@307357 91177308-0d34-0410-b5e6-96231b3b80d8
This fails with gcc because __builtin_isnan and friends, which
libcpp_isnan and friends call, are not themselves constexpr-evaluatable.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@287041 91177308-0d34-0410-b5e6-96231b3b80d8
