Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/src/boost/libs/math/test/test_sinc.cpp b/src/boost/libs/math/test/test_sinc.cpp
new file mode 100644
index 00000000..ad0eaeb9
--- /dev/null
+++ b/src/boost/libs/math/test/test_sinc.cpp
@@ -0,0 +1,110 @@
+//  (C) Copyright John Maddock 2018.
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <pch_light.hpp>
+#include "test_sinc.hpp"
+#include <boost/multiprecision/cpp_bin_float.hpp>
+#include <boost/math/special_functions/next.hpp>
+
+//
+// DESCRIPTION:
+// ~~~~~~~~~~~~
+//
+// This file tests the sinc_pi function.  There are two sets of tests, spot
+// tests which compare our results with selected values computed
+// using the online special function calculator at 
+// functions.wolfram.com, while the bulk of the accuracy tests
+// use values generated with NTL::RR at 1000-bit precision
+// and our generic versions of these functions.
+//
+// Note that when this file is first run on a new platform many of
+// these tests will fail: the default accuracy is 1 epsilon which
+// is too tight for most platforms.  In this situation you will 
+// need to cast a human eye over the error rates reported and make
+// a judgement as to whether they are acceptable.  Either way please
+// report the results to the Boost mailing list.  Acceptable rates of
+// error are marked up below as a series of regular expressions that
+// identify the compiler/stdlib/platform/data-type/test-data/test-function
+// along with the maximum expected peek and RMS mean errors for that
+// test.
+//
+
+void expected_results()
+{
+   //
+   // Define the max and mean errors expected for
+   // various compilers and platforms.
+   //
+   add_expected_result(
+      ".*",                          // compiler
+      ".*",                          // stdlib
+      ".*",                          // platform
+      ".*",                          // test type(s)
+      ".*",                          // test data group
+      ".*", 3, 3);                   // test function
+   //
+   // Finish off by printing out the compiler/stdlib/platform names,
+   // we do this to make it easier to mark up expected error rates.
+   //
+   std::cout << "Tests run with " << BOOST_COMPILER << ", " 
+      << BOOST_STDLIB << ", " << BOOST_PLATFORM << std::endl;
+}
+
+template <class T>
+void test_close_to_transition()
+{
+   T transition = 3.3f * boost::math::tools::forth_root_epsilon<T>();
+   T val = transition;
+
+   for (unsigned i = 0; i < 100; ++i)
+   {
+      boost::multiprecision::cpp_bin_float_50 extended = val;
+      extended = sin(extended) / extended;
+      T expected = extended.template convert_to<T>();
+      T result = boost::math::sinc_pi(val);
+      BOOST_CHECK_LE(boost::math::epsilon_difference(result, expected), 3);
+      result = boost::math::sinc_pi(-val);
+      BOOST_CHECK_LE(boost::math::epsilon_difference(result, expected), 3);
+      val = boost::math::float_prior(val);
+   }
+   for (unsigned i = 0; i < 100; ++i)
+   {
+      boost::multiprecision::cpp_bin_float_50 extended = val;
+      extended = sin(extended) / extended;
+      T expected = extended.template convert_to<T>();
+      T result = boost::math::sinc_pi(val);
+      BOOST_CHECK_LE(boost::math::epsilon_difference(result, expected), 3);
+      result = boost::math::sinc_pi(-val);
+      BOOST_CHECK_LE(boost::math::epsilon_difference(result, expected), 3);
+      val = boost::math::float_next(val);
+   }
+}
+
+
+BOOST_AUTO_TEST_CASE( test_main )
+{
+   BOOST_MATH_CONTROL_FP;
+
+   expected_results();
+
+   test_sinc(0.1F, "float");
+   test_close_to_transition<float>();
+   test_sinc(0.1, "double");
+   test_close_to_transition<double>();
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+   test_sinc(0.1L, "long double");
+   test_close_to_transition<long double>();
+#ifndef BOOST_MATH_NO_REAL_CONCEPT_TESTS
+   test_sinc(boost::math::concepts::real_concept(0.1), "real_concept");
+#endif
+#else
+   std::cout << "<note>The long double tests have been disabled on this platform "
+      "either because the long double overloads of the usual math functions are "
+      "not available at all, or because they are too inaccurate for these tests "
+      "to pass.</note>" << std::endl;
+#endif
+}
+
+