import quincy beta 17.1.0

[ceph.git] / ceph / src / boost / libs / math / reporting / accuracy / test_agm.cpp

diff --git a/ceph/src/boost/libs/math/reporting/accuracy/test_agm.cpp b/ceph/src/boost/libs/math/reporting/accuracy/test_agm.cpp
new file mode 100644 (file)
index 0000000..ca28fea
--- /dev/null
+++ b/ceph/src/boost/libs/math/reporting/accuracy/test_agm.cpp
@@ -0,0 +1,36 @@
+//  (C) Copyright Nick Thompson 2020.
+//  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 <iostream>
+#include <boost/math/tools/ulps_plot.hpp>
+#include <boost/core/demangle.hpp>
+#include <boost/math/tools/agm.hpp>
+#include <boost/multiprecision/float128.hpp>
+
+using boost::math::tools::ulps_plot;
+using boost::math::tools::agm;
+
+int main() {
+    using PreciseReal = boost::multiprecision::float128;
+    using CoarseReal = float;
+
+    auto agm_coarse = [](CoarseReal x) {
+        return agm<CoarseReal>(x, CoarseReal(1));
+    };
+    auto agm_precise = [](PreciseReal x) {
+        return agm<PreciseReal>(x, PreciseReal(1));
+    };
+
+    std::string filename = "agm_" + boost::core::demangle(typeid(CoarseReal).name()) + ".svg";
+    int samples = 2500;
+    int width = 1100;
+    PreciseReal clip = 100;
+    auto plot = ulps_plot<decltype(agm_precise), PreciseReal, CoarseReal>(agm_precise, CoarseReal(0), CoarseReal(10000), samples);
+    plot.clip(clip).width(width);
+    std::string title = "AGM ULP plot at " + boost::core::demangle(typeid(CoarseReal).name()) + " precision";
+    //plot.title(title);
+    plot.vertical_lines(10);
+    plot.add_fn(agm_coarse);
+    plot.write(filename);
+}