1 files changed, 58 insertions, 0 deletions
diff --git a/src/boost/libs/integer/test/extended_euclidean_test.cpp b/src/boost/libs/integer/test/extended_euclidean_test.cpp
new file mode 100644
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--- /dev/null
+++ b/src/boost/libs/integer/test/extended_euclidean_test.cpp
@@ -0,0 +1,58 @@
+/*
+ *  (C) Copyright Nick Thompson 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 "multiprecision_config.hpp"
+
+#ifndef DISABLE_MP_TESTS
+#include <boost/integer/extended_euclidean.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/multiprecision/cpp_int.hpp>
+#include <boost/integer/common_factor.hpp>
+
+using boost::multiprecision::int128_t;
+using boost::multiprecision::int256_t;
+using boost::integer::extended_euclidean;
+using boost::integer::gcd;
+
+template<class Z>
+void test_extended_euclidean()
+{
+    // Stress test:
+    //Z max_arg = std::numeric_limits<Z>::max();
+    Z max_arg = 500;
+    for (Z m = max_arg; m > 0; --m)
+    {
+        for (Z n = max_arg; n > 0; --n)
+        {
+            boost::integer::euclidean_result_t<Z> u = extended_euclidean(m, n);
+            int256_t gcdmn = gcd(m, n);
+            int256_t x = u.x;
+            int256_t y = u.y;
+            BOOST_TEST_EQ(u.gcd, gcdmn);
+            BOOST_TEST_EQ(m*x + n*y, gcdmn);
+        }
+    }
+}
+
+
+
+int main()
+{
+    test_extended_euclidean<boost::int16_t>();
+    test_extended_euclidean<boost::int32_t>();
+    test_extended_euclidean<boost::int64_t>();
+    test_extended_euclidean<int128_t>();
+
+    return boost::report_errors();;
+}
+#else
+int main()
+{
+    return 0;
+}
+#endif