Commit Graph

27 Commits

Author SHA1 Message Date
Marshall Clow f56972e224 Implement the infrastructure for feature-test macros. Very few actual feature test macros, though. Reviewed as: https://reviews.llvm.org/D51955
llvm-svn: 342073
2018-09-12 19:41:40 +00:00
Mikhail Maltsev 477b5f688c [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

llvm-svn: 325510
2018-02-19 15:41:36 +00:00
Marshall Clow 0551d83ed5 Implement LWG2870: Default value of parameter theta of polar should be dependent
llvm-svn: 323918
2018-01-31 21:42:39 +00:00
Duncan P. N. Exon Smith 66631a12b8 cmath: Support clang's -fdelayed-template-parsing
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

llvm-svn: 307357
2017-07-07 05:13:36 +00:00
Eric Fiselier e2f2d1edef [NFC] Rename _LIBCPP_TYPE_VIS_ONLY to _LIBCPP_TEMPLATE_VIS
The name _LIBCPP_TYPE_VIS_ONLY is no longer accurate because both
_LIBCPP_TYPE_VIS and _LIBCPP_TYPE_VIS_ONLY expand to
__attribute__((__type_visibility__)) with Clang. The only remaining difference
is that _LIBCPP_TYPE_VIS_ONLY can be applied to templates whereas
_LIBCPP_TYPE_VIS cannot (due to dllimport/dllexport not being allowed on
templates).

This patch renames _LIBCPP_TYPE_VIS_ONLY to _LIBCPP_TEMPLATE_VIS.

llvm-svn: 291035
2017-01-04 23:56:00 +00:00
Eric Fiselier fd83822741 Fix unused parameters and variables
llvm-svn: 290459
2016-12-23 23:37:52 +00:00
Hal Finkel ae22f0b242 Use __builtin_isnan/isinf/isfinite in complex
The libc-provided isnan/isinf/isfinite macro implementations are specifically
designed to function correctly, even in the presence of -ffast-math (or, more
specifically, -ffinite-math-only). As such, on most implementation, these
either always turn into external function calls (e.g. glibc) or are
specifically function calls when FINITE_MATH_ONLY is defined (e.g. Darwin).

Our implementation of complex arithmetic makes heavy use of isnan/isinf/isfinite
to deal with corner cases involving non-finite quantities. This was problematic
in two respects:

  1. On systems where these are always function calls (e.g. Linux/glibc), there was a
     performance penalty
  2. When compiling with -ffast-math, there was a significant performance
     penalty (in fact, on Darwin and systems with similar implementations, the code
     may in fact be slower than not using -ffast-math, because the inline
     definitions provided by libc become unavailable to prevent the checks from
     being optimized out).

Eliding these inf/nan checks in -ffast-math mode is consistent with what
happens with libstdc++, and in my experience, what users expect. This is
critical to getting high-performance code when using complex<T>. This change
replaces uses of those functions on basic floating-point types with calls to
__builtin_isnan/isinf/isfinite, which Clang will always expand inline. When
using -ffast-math (or -ffinite-math-only), the optimizer will remove the checks
as expected.

Differential Revision: https://reviews.llvm.org/D18639

llvm-svn: 283051
2016-10-01 20:38:31 +00:00
Marshall Clow d437fa5c8c Add an _LIBCPP_NORETURN inline function named __throw_XXX for each exception type we define. They either construct and throw the exception, or abort() (if exceptions are disabled). Use these functions everywhere instead of assert()ing when exceptions are disabled. WARNING: This is a behavior change - but only with exceptions disabled. Reviewed as: https://reviews.llvm.org/D23855.
llvm-svn: 279744
2016-08-25 15:09:01 +00:00
Eric Fiselier b11642bf94 Add SFINAE on additional overloads of std::complex functions. Fixes PR19921.
The functions arg, conj, imag, norm, proj, and real have additional overloads
for arguments of integral or floating point types. However these overloads should
not allow conversions to the integral/floating point types, only exact matches.

This patch constrains these functions so they no longer allow conversions.

llvm-svn: 276067
2016-07-20 00:14:10 +00:00
Evgeniy Stepanov cd31b4348a Cleanup: move visibility/linkage attributes to the first declaration.
http://reviews.llvm.org/D15404

llvm-svn: 267093
2016-04-22 01:04:55 +00:00
Marshall Clow 35508d4921 Fix for Bug #27193; 'std::acos on complex does not agree with C'. Tests need work; so the bug will stay open.
llvm-svn: 265306
2016-04-04 16:08:54 +00:00
Marshall Clow ea7c7cc521 Implement literal suffixes for compled
llvm-svn: 192048
2013-10-05 21:19:49 +00:00
Howard Hinnant f0544c2086 Nico Rieck: this patch series fixes visibility issues on Windows as explained in <http://lists.cs.uiuc.edu/pipermail/cfe-dev/2013-August/031214.html>.
llvm-svn: 188192
2013-08-12 18:38:34 +00:00
Marshall Clow a1cd191624 Implement constexpr (n3302) and fix operator *= and /=
llvm-svn: 187529
2013-07-31 21:02:34 +00:00
Howard Hinnant 6e41256f68 No functionality change at this time. I've split _LIBCPP_VISIBLE up into two flags: _LIBCPP_TYPE_VIS and _LIBCPP_FUNC_VIS. This is in preparation for taking advantage of clang's new __type_visibility__ attribute.
llvm-svn: 176593
2013-03-06 23:30:19 +00:00
Howard Hinnant 119703f984 Dimitry Andric: Silence some miscellaneous warnings.
llvm-svn: 167493
2012-11-06 21:55:44 +00:00
Howard Hinnant c43826f003 Add overflow check to tanh(complex) and reduce to finite answer. Fixes http://llvm.org/bugs/show_bug.cgi?id=13874
llvm-svn: 164266
2012-09-19 23:51:47 +00:00
Howard Hinnant f4e11de8e8 constexpr applied to <complex>.
llvm-svn: 160585
2012-07-20 22:18:27 +00:00
Howard Hinnant a04d2b3330 Fix http://llvm.org/bugs/show_bug.cgi?id=11734
llvm-svn: 147853
2012-01-10 15:15:47 +00:00
Howard Hinnant 073458b1ab Windows support by Ruben Van Boxem.
llvm-svn: 142235
2011-10-17 20:05:10 +00:00
Howard Hinnant ce48a1137d _STD -> _VSTD to avoid macro clash on windows
llvm-svn: 134190
2011-06-30 21:18:19 +00:00
Howard Hinnant d518d1c807 LWG 1522
llvm-svn: 119710
2010-11-18 17:34:48 +00:00
Howard Hinnant 412dbebe1b license change
llvm-svn: 119395
2010-11-16 22:09:02 +00:00
Howard Hinnant fb100021b7 visibility-decoration.
llvm-svn: 114486
2010-09-21 21:28:23 +00:00
Howard Hinnant b3371f6f49 Fixing whitespace problems
llvm-svn: 111750
2010-08-22 00:02:43 +00:00
Howard Hinnant 5b08a8a432 Wiped out some non-ascii characters that snuck into the copyright.
llvm-svn: 103516
2010-05-11 21:36:01 +00:00
Howard Hinnant 3e519524c1 libcxx initial import
llvm-svn: 103490
2010-05-11 19:42:16 +00:00