From a38b51bc3a4cb1c4f22e5708b27379d37d141d90 Mon Sep 17 00:00:00 2001 From: Jonathan Wakely Date: Tue, 6 Aug 2019 16:57:51 +0100 Subject: [PATCH] Specialize std::numbers constants for __float128 * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128] (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v) (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit specializations for __float128. * testsuite/26_numerics/numbers/float128.cc: New test. From-SVN: r274145 --- libstdc++-v3/ChangeLog | 8 +++ libstdc++-v3/include/std/numbers | 66 +++++++++++++++++++ .../testsuite/26_numerics/numbers/float128.cc | 41 ++++++++++++ 3 files changed, 115 insertions(+) create mode 100644 libstdc++-v3/testsuite/26_numerics/numbers/float128.cc diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 0a70dc290d5..7173b90f0e6 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,11 @@ +2019-08-06 Jonathan Wakely + + * include/std/numbers [!__STRICT_ANSI__ && _GLIBCXX_USE_FLOAT128] + (e_v, log2e_v, log10e_v, pi_v, inv_pi_v, inv_sqrtpi_v, ln2_v, ln10_v) + (sqrt2_v, sqrt3_v, inv_sqrt3, egamma_v, phi_v): Add explicit + specializations for __float128. + * testsuite/26_numerics/numbers/float128.cc: New test. + 2019-08-04 Gerald Pfeifer * doc/xml/manual/documentation_hacking.xml: doxygen.org is now diff --git a/libstdc++-v3/include/std/numbers b/libstdc++-v3/include/std/numbers index b8e38dd8080..314b130fbd5 100644 --- a/libstdc++-v3/include/std/numbers +++ b/libstdc++-v3/include/std/numbers @@ -133,6 +133,72 @@ namespace numbers inline constexpr double egamma = egamma_v; inline constexpr double phi = phi_v; +#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) + template<> + inline constexpr __float128 e_v<__float128> + = 2.718281828459045235360287471352662498Q; + + /// log_2 e + template<> + inline constexpr __float128 log2e_v<__float128> + = 1.442695040888963407359924681001892137Q; + + /// log_10 e + template<> + inline constexpr __float128 log10e_v<__float128> + = 0.434294481903251827651128918916605082Q; + + /// pi + template<> + inline constexpr __float128 pi_v<__float128> + = 3.141592653589793238462643383279502884Q; + + /// 1/pi + template<> + inline constexpr __float128 inv_pi_v<__float128> + = 0.318309886183790671537767526745028724Q; + + /// 1/sqrt(pi) + template<> + inline constexpr __float128 inv_sqrtpi_v<__float128> + = 0.564189583547756286948079451560772586Q; + + /// log_e 2 + template<> + inline constexpr __float128 ln2_v<__float128> + = 0.693147180559945309417232121458176568Q; + + /// log_e 10 + template<> + inline constexpr __float128 ln10_v<__float128> + = 2.302585092994045684017991454684364208Q; + + /// sqrt(2) + template<> + inline constexpr __float128 sqrt2_v<__float128> + = 1.414213562373095048801688724209698079Q; + + /// sqrt(3) + template<> + inline constexpr __float128 sqrt3_v<__float128> + = 1.732050807568877293527446341505872367Q; + + /// 1/sqrt(3) + template<> + inline constexpr __float128 inv_sqrt3_v<__float128> + = 0.577350269189625764509148780501957456Q; + + /// The Euler-Mascheroni constant + template<> + inline constexpr __float128 egamma_v<__float128> + = 0.577215664901532860606512090082402431Q; + + /// The golden ratio, (1+sqrt(5))/2 + template<> + inline constexpr __float128 phi_v<__float128> + = 1.618033988749894848204586834365638118Q; +#endif // USE_FLOAT128 + } // namespace numbers /// @} _GLIBCXX_END_NAMESPACE_VERSION diff --git a/libstdc++-v3/testsuite/26_numerics/numbers/float128.cc b/libstdc++-v3/testsuite/26_numerics/numbers/float128.cc new file mode 100644 index 00000000000..2d9dafcd482 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/numbers/float128.cc @@ -0,0 +1,41 @@ +// Copyright (C) 2019 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// . + +// { dg-options "-std=gnu++2a" } +// { dg-do compile { target c++2a } } + +#include + +#if defined(_GLIBCXX_USE_FLOAT128) +void +test01() +{ + const __float128* d1 = &std::numbers::e_v<__float128>; + const __float128* d2 = &std::numbers::log2e_v<__float128>; + const __float128* d3 = &std::numbers::log10e_v<__float128>; + const __float128* d4 = &std::numbers::pi_v<__float128>; + const __float128* d5 = &std::numbers::inv_pi_v<__float128>; + const __float128* d6 = &std::numbers::inv_sqrtpi_v<__float128>; + const __float128* d7 = &std::numbers::ln2_v<__float128>; + const __float128* d8 = &std::numbers::ln10_v<__float128>; + const __float128* d9 = &std::numbers::sqrt2_v<__float128>; + const __float128* d10 = &std::numbers::sqrt3_v<__float128>; + const __float128* d11 = &std::numbers::inv_sqrt3_v<__float128>; + const __float128* d12 = &std::numbers::egamma_v<__float128>; + const __float128* d13 = &std::numbers::phi_v<__float128>; +} +#endif -- 2.30.2