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diff --git a/libstdc++-v3/testsuite/decimal/compound-assignment.cc b/libstdc++-v3/testsuite/decimal/compound-assignment.cc
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+// Copyright (C) 2009 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
+// <http://www.gnu.org/licenses/>.
+
+// { dg-require-effective-target dfp }
+
+// ISO/IEC TR 24733 3.2.2.6 Compound assignment (decimal32).
+// ISO/IEC TR 24733 3.2.3.6 Compound assignment (decimal64).
+// ISO/IEC TR 24733 3.2.4.6 Compound assignment (decimal128).
+
+#include <decimal/decimal>
+#include <testsuite_hooks.h>
+
+using namespace std::decimal;
+
+decimal32 d32 (5);
+decimal64 d64 (-10);
+decimal128 d128 (25);
+int si = -2;
+unsigned int ui = 5;
+long sl = -10;
+unsigned long ul = 20;
+long long sll = -25;
+unsigned long long ull = 50;
+
+void
+compound_assignment_add_32 (void)
+{
+ decimal32 a (1000), b;
+
+ b = a; b += d32; VERIFY (b == 1005);
+ b = a; b += d64; VERIFY (b == 990);
+ b = a; b += d128; VERIFY (b == 1025);
+ b = a; b += si; VERIFY (b == 998);
+ b = a; b += ui; VERIFY (b == 1005);
+ b = a; b += sl; VERIFY (b == 990);
+ b = a; b += ul; VERIFY (b == 1020);
+ b = a; b += sll; VERIFY (b == 975);
+ b = a; b += ull; VERIFY (b == 1050);
+}
+
+void
+compound_assignment_subtract_32 (void)
+{
+ decimal32 a (1000), b;
+
+ b = a; b -= d32; VERIFY (b == 995);
+ b = a; b -= d64; VERIFY (b == 1010);
+ b = a; b -= d128; VERIFY (b == 975);
+ b = a; b -= si; VERIFY (b == 1002);
+ b = a; b -= ui; VERIFY (b == 995);
+ b = a; b -= sl; VERIFY (b == 1010);
+ b = a; b -= ul; VERIFY (b == 980);
+ b = a; b -= sll; VERIFY (b == 1025);
+ b = a; b -= ull; VERIFY (b == 950);
+}
+
+void
+compound_assignment_multiply_32 (void)
+{
+ decimal32 a (1000), b;
+
+ b = a; b *= d32; VERIFY (b == 5000);
+ b = a; b *= d64; VERIFY (b == -10000);
+ b = a; b *= d128; VERIFY (b == 25000);
+ b = a; b *= si; VERIFY (b == -2000);
+ b = a; b *= ui; VERIFY (b == 5000);
+ b = a; b *= sl; VERIFY (b == -10000);
+ b = a; b *= ul; VERIFY (b == 20000);
+ b = a; b *= sll; VERIFY (b == -25000);
+ b = a; b *= ull; VERIFY (b == 50000);
+}
+
+void
+compound_assignment_divide_32 (void)
+{
+ decimal32 a (1000), b;
+
+ b = a; b /= d32; VERIFY (b == 200);
+ b = a; b /= d64; VERIFY (b == -100);
+ b = a; b /= d128; VERIFY (b == 40);
+ b = a; b /= si; VERIFY (b == -500);
+ b = a; b /= ui; VERIFY (b == 200);
+ b = a; b /= sl; VERIFY (b == -100);
+ b = a; b /= ul; VERIFY (b == 50);
+ b = a; b /= sll; VERIFY (b == -40);
+ b = a; b /= ull; VERIFY (b == 20);
+}
+
+void
+compound_assignment_add_64 (void)
+{
+ decimal64 a (1000), b;
+
+ b = a; b += d32; VERIFY (b == 1005);
+ b = a; b += d64; VERIFY (b == 990);
+ b = a; b += d128; VERIFY (b == 1025);
+ b = a; b += si; VERIFY (b == 998);
+ b = a; b += ui; VERIFY (b == 1005);
+ b = a; b += sl; VERIFY (b == 990);
+ b = a; b += ul; VERIFY (b == 1020);
+ b = a; b += sll; VERIFY (b == 975);
+ b = a; b += ull; VERIFY (b == 1050);
+}
+
+void
+compound_assignment_subtract_64 (void)
+{
+ decimal64 a (1000), b;
+
+ b = a; b -= d32; VERIFY (b == 995);
+ b = a; b -= d64; VERIFY (b == 1010);
+ b = a; b -= d128; VERIFY (b == 975);
+ b = a; b -= si; VERIFY (b == 1002);
+ b = a; b -= ui; VERIFY (b == 995);
+ b = a; b -= sl; VERIFY (b == 1010);
+ b = a; b -= ul; VERIFY (b == 980);
+ b = a; b -= sll; VERIFY (b == 1025);
+ b = a; b -= ull; VERIFY (b == 950);
+}
+
+void
+compound_assignment_multiply_64 (void)
+{
+ decimal64 a (1000), b;
+
+ b = a; b *= d32; VERIFY (b == 5000);
+ b = a; b *= d64; VERIFY (b == -10000);
+ b = a; b *= d128; VERIFY (b == 25000);
+ b = a; b *= si; VERIFY (b == -2000);
+ b = a; b *= ui; VERIFY (b == 5000);
+ b = a; b *= sl; VERIFY (b == -10000);
+ b = a; b *= ul; VERIFY (b == 20000);
+ b = a; b *= sll; VERIFY (b == -25000);
+ b = a; b *= ull; VERIFY (b == 50000);
+}
+
+void
+compound_assignment_divide_64 (void)
+{
+ decimal64 a (1000), b;
+
+ b = a; b /= d32; VERIFY (b == 200);
+ b = a; b /= d64; VERIFY (b == -100);
+ b = a; b /= d128; VERIFY (b == 40);
+ b = a; b /= si; VERIFY (b == -500);
+ b = a; b /= ui; VERIFY (b == 200);
+ b = a; b /= sl; VERIFY (b == -100);
+ b = a; b /= ul; VERIFY (b == 50);
+ b = a; b /= sll; VERIFY (b == -40);
+ b = a; b /= ull; VERIFY (b == 20);
+}
+
+void
+compound_assignment_add_128 (void)
+{
+ decimal128 a (1000), b;
+
+ b = a; b += d32; VERIFY (b == 1005);
+ b = a; b += d64; VERIFY (b == 990);
+ b = a; b += d128; VERIFY (b == 1025);
+ b = a; b += si; VERIFY (b == 998);
+ b = a; b += ui; VERIFY (b == 1005);
+ b = a; b += sl; VERIFY (b == 990);
+ b = a; b += ul; VERIFY (b == 1020);
+ b = a; b += sll; VERIFY (b == 975);
+ b = a; b += ull; VERIFY (b == 1050);
+}
+
+void
+compound_assignment_subtract_128 (void)
+{
+ decimal128 a (1000), b;
+
+ b = a; b -= d32; VERIFY (b == 995);
+ b = a; b -= d64; VERIFY (b == 1010);
+ b = a; b -= d128; VERIFY (b == 975);
+ b = a; b -= si; VERIFY (b == 1002);
+ b = a; b -= ui; VERIFY (b == 995);
+ b = a; b -= sl; VERIFY (b == 1010);
+ b = a; b -= ul; VERIFY (b == 980);
+ b = a; b -= sll; VERIFY (b == 1025);
+ b = a; b -= ull; VERIFY (b == 950);
+}
+
+void
+compound_assignment_multiply_128 (void)
+{
+ decimal128 a (1000), b;
+
+ b = a; b *= d32; VERIFY (b == 5000);
+ b = a; b *= d64; VERIFY (b == -10000);
+ b = a; b *= d128; VERIFY (b == 25000);
+ b = a; b *= si; VERIFY (b == -2000);
+ b = a; b *= ui; VERIFY (b == 5000);
+ b = a; b *= sl; VERIFY (b == -10000);
+ b = a; b *= ul; VERIFY (b == 20000);
+ b = a; b *= sll; VERIFY (b == -25000);
+ b = a; b *= ull; VERIFY (b == 50000);
+}
+
+void
+compound_assignment_divide_128 (void)
+{
+ decimal128 a (1000), b;
+
+ b = a; b /= d32; VERIFY (b == 200);
+ b = a; b /= d64; VERIFY (b == -100);
+ b = a; b /= d128; VERIFY (b == 40);
+ b = a; b /= si; VERIFY (b == -500);
+ b = a; b /= ui; VERIFY (b == 200);
+ b = a; b /= sl; VERIFY (b == -100);
+ b = a; b /= ul; VERIFY (b == 50);
+ b = a; b /= sll; VERIFY (b == -40);
+ b = a; b /= ull; VERIFY (b == 20);
+}
+
+int
+main ()
+{
+ compound_assignment_add_32 ();
+ compound_assignment_subtract_32 ();
+ compound_assignment_multiply_32 ();
+ compound_assignment_divide_32 ();
+
+ compound_assignment_add_64 ();
+ compound_assignment_subtract_64 ();
+ compound_assignment_multiply_64 ();
+ compound_assignment_divide_64 ();
+
+ compound_assignment_add_128 ();
+ compound_assignment_subtract_128 ();
+ compound_assignment_multiply_128 ();
+ compound_assignment_divide_128 ();
+}
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