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diff --git a/gmp/tests/cxx/t-binary.cc b/gmp/tests/cxx/t-binary.cc
new file mode 100644
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--- /dev/null
+++ b/gmp/tests/cxx/t-binary.cc
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+/* Test mp*_class binary expressions.
+
+Copyright 2001, 2002, 2003, 2008 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include "config.h"
+
+#include <iostream>
+
+#include "gmp.h"
+#include "gmpxx.h"
+#include "gmp-impl.h"
+#include "tests.h"
+
+using namespace std;
+
+
+void
+check_mpz (void)
+{
+  // template <class T, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<T, T>, Op> >
+  {
+    mpz_class a(1), b(2);
+    mpz_class c(a + b); ASSERT_ALWAYS(c == 3);
+  }
+  {
+    mpz_class a(3), b(4);
+    mpz_class c;
+    c = a * b; ASSERT_ALWAYS(c == 12);
+  }
+  {
+    mpz_class a(5), b(3);
+    mpz_class c;
+    c = a % b; ASSERT_ALWAYS(c == 2);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, U, Op> >
+  {
+    mpz_class a(1);
+    signed int b = 3;
+    mpz_class c(a - b); ASSERT_ALWAYS(c == -2);
+  }
+  {
+    mpz_class a(-8);
+    unsigned int b = 2;
+    mpz_class c;
+    c = a / b; ASSERT_ALWAYS(c == -4);
+  }
+  {
+    mpz_class a(2);
+    double b = 3.0;
+    mpz_class c(a + b); ASSERT_ALWAYS(c == 5);
+  }
+  {
+    mpz_class a(4);
+    mpz_class b;
+    b = a + 0; ASSERT_ALWAYS(b == 4);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<U, __gmp_expr<T, T>, Op> >
+  {
+    mpz_class a(3);
+    signed int b = 9;
+    mpz_class c(b / a); ASSERT_ALWAYS(c == 3);
+  }
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<V, W>, Op> >
+  // type of result can't be mpz
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<U, V>, __gmp_expr<T, W>, Op> >
+  // type of result can't be mpz
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<T, U>, Op> >
+  {
+    mpz_class a(3), b(4);
+    mpz_class c(a * (-b)); ASSERT_ALWAYS(c == -12);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<T, T>, Op> >
+  {
+    mpz_class a(3), b(2), c(1);
+    mpz_class d;
+    d = (a % b) + c; ASSERT_ALWAYS(d == 2);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, V, Op> >
+  {
+    mpz_class a(-5);
+    unsigned int b = 2;
+    mpz_class c((-a) << b); ASSERT_ALWAYS(c == 20);
+  }
+  {
+    mpz_class a(5), b(-4);
+    signed int c = 3;
+    mpz_class d;
+    d = (a * b) >> c; ASSERT_ALWAYS(d == -3);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<U, __gmp_expr<T, V>, Op> >
+  {
+    mpz_class a(2), b(4);
+    double c = 6;
+    mpz_class d(c / (a - b)); ASSERT_ALWAYS(d == -3);
+  }
+  {
+    mpz_class a(3), b(2);
+    double c = 1;
+    mpz_class d;
+    d = c + (a + b); ASSERT_ALWAYS(d == 6);
+  }
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<V, W>, Op> >
+  // type of result can't be mpz
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<U, V>, __gmp_expr<T, W>, Op> >
+  // type of result can't be mpz
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<T, V>, Op> >
+  {
+    mpz_class a(3), b(5), c(7);
+    mpz_class d;
+    d = (a - b) * (-c); ASSERT_ALWAYS(d == 14);
+  }
+
+  {
+    mpz_class a(0xcafe), b(0xbeef), c, want;
+    c = a & b; ASSERT_ALWAYS (c == 0x8aee);
+    c = a | b; ASSERT_ALWAYS (c == 0xfeff);
+    c = a ^ b; ASSERT_ALWAYS (c == 0x7411);
+    c = a & 0xbeef; ASSERT_ALWAYS (c == 0x8aee);
+    c = a | 0xbeef; ASSERT_ALWAYS (c == 0xfeff);
+    c = a ^ 0xbeef; ASSERT_ALWAYS (c == 0x7411);
+    c = a & -0xbeef; ASSERT_ALWAYS (c == 0x4010);
+    c = a | -0xbeef; ASSERT_ALWAYS (c == -0x3401);
+    c = a ^ -0xbeef; ASSERT_ALWAYS (c == -0x7411);
+    c = a & 48879.0; ASSERT_ALWAYS (c == 0x8aee);
+    c = a | 48879.0; ASSERT_ALWAYS (c == 0xfeff);
+    c = a ^ 48879.0; ASSERT_ALWAYS (c == 0x7411);
+
+    c = a | 1267650600228229401496703205376.0; // 2^100
+    want = "0x1000000000000000000000cafe";
+    ASSERT_ALWAYS (c == want);
+  }
+
+}
+
+void
+check_mpq (void)
+{
+  // template <class T, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<T, T>, Op> >
+  {
+    mpq_class a(1, 2), b(3, 4);
+    mpq_class c(a + b); ASSERT_ALWAYS(c == 1.25);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, U, Op> >
+  {
+    mpq_class a(1, 2);
+    signed int b = 3;
+    mpq_class c(a - b); ASSERT_ALWAYS(c == -2.5);
+  }
+  {
+    mpq_class a(1, 2);
+    mpq_class b;
+    b = a + 0; ASSERT_ALWAYS(b == 0.5);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<U, __gmp_expr<T, T>, Op> >
+  {
+    mpq_class a(2, 3);
+    signed int b = 4;
+    mpq_class c;
+    c = b / a; ASSERT_ALWAYS(c == 6);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<U, V>, Op> >
+  {
+    mpq_class a(1, 2);
+    mpz_class b(1);
+    mpq_class c(a + b); ASSERT_ALWAYS(c == 1.5);
+  }
+  {
+    mpq_class a(2, 3);
+    mpz_class b(1);
+    double c = 2.0;
+    mpq_class d;
+    d = a * (b + c); ASSERT_ALWAYS(d == 2);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<U, V>, __gmp_expr<T, T>, Op> >
+  {
+    mpq_class a(2, 3);
+    mpz_class b(4);
+    mpq_class c(b / a); ASSERT_ALWAYS(c == 6);
+  }
+  {
+    mpq_class a(2, 3);
+    mpz_class b(1), c(4);
+    mpq_class d;
+    d = (b - c) * a; ASSERT_ALWAYS(d == -2);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<T, U>, Op> >
+  {
+    mpq_class a(1, 3), b(3, 4);
+    mpq_class c;
+    c = a * (-b); ASSERT_ALWAYS(c == -0.25);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<T, T>, Op> >
+  {
+    mpq_class a(1, 3), b(2, 3), c(1, 4);
+    mpq_class d((a / b) + c); ASSERT_ALWAYS(d == 0.75);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, V, Op> >
+  {
+    mpq_class a(3, 8);
+    unsigned int b = 4;
+    mpq_class c((-a) << b); ASSERT_ALWAYS(c == -6);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<U, __gmp_expr<T, V>, Op> >
+  {
+    mpq_class a(1, 2), b(1, 4);
+    double c = 6.0;
+    mpq_class d;
+    d = c / (a + b); ASSERT_ALWAYS(d == 8);
+  }
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<V, W>, Op> >
+  {
+    mpq_class a(1, 2), b(1, 4);
+    mpz_class c(1);
+    mpq_class d((a + b) - c); ASSERT_ALWAYS(d == -0.25);
+  }
+  {
+    mpq_class a(1, 3), b(3, 2);
+    mpz_class c(2), d(4);
+    mpq_class e;
+    e = (a * b) / (c - d); ASSERT_ALWAYS(e == -0.25);
+  }
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<U, V>, __gmp_expr<T, W>, Op> >
+  {
+    mpq_class a(1, 3), b(3, 4);
+    mpz_class c(-3);
+    mpq_class d(c * (a * b)); ASSERT_ALWAYS(d == -0.75);
+  }
+  {
+    mpq_class a(1, 3), b(3, 5);
+    mpz_class c(6);
+    signed int d = 4;
+    mpq_class e;
+    e = (c % d) / (a * b); ASSERT_ALWAYS(e == 10);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<T, V>, Op> >
+  {
+    mpq_class a(1, 3), b(3, 4), c(2, 5);
+    mpq_class d;
+    d = (a * b) / (-c); ASSERT_ALWAYS(d == -0.625);
+  }
+}
+
+void
+check_mpf (void)
+{
+  // template <class T, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<T, T>, Op> >
+  {
+    mpf_class a(1), b(2);
+    mpf_class c(a + b); ASSERT_ALWAYS(c == 3);
+  }
+  {
+    mpf_class a(1.5), b(6);
+    mpf_class c;
+    c = a / b; ASSERT_ALWAYS(c == 0.25);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, U, Op> >
+  {
+    mpf_class a(1);
+    signed int b = -2;
+    mpf_class c(a - b); ASSERT_ALWAYS(c == 3);
+  }
+  {
+    mpf_class a(2);
+    mpf_class b;
+    b = a + 0; ASSERT_ALWAYS(b == 2);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<U, __gmp_expr<T, T>, Op> >
+  {
+    mpf_class a(2);
+    unsigned int b = 3;
+    mpf_class c;
+    c = b / a; ASSERT_ALWAYS(c == 1.5);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<U, V>, Op> >
+  {
+    mpf_class a(2);
+    mpz_class b(3);
+    mpf_class c(a - b); ASSERT_ALWAYS(c == -1);
+  }
+  {
+    mpf_class a(3);
+    mpz_class b(2), c(1);
+    mpf_class d;
+    d = a * (b + c); ASSERT_ALWAYS(d == 9);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<U, V>, __gmp_expr<T, T>, Op> >
+  {
+    mpf_class a(6);
+    mpq_class b(3, 4);
+    mpf_class c(a * b); ASSERT_ALWAYS(c == 4.5);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, T>, __gmp_expr<T, U>, Op> >
+  {
+    mpf_class a(2), b(-3);
+    mpf_class c;
+    c = a * (-b); ASSERT_ALWAYS(c == 6);
+  }
+
+  // template <class T, class U, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<T, T>, Op> >
+  {
+    mpf_class a(3), b(4), c(5);
+    mpf_class d;
+    d = (a / b) - c; ASSERT_ALWAYS(d == -4.25);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, V, Op> >
+  {
+    mpf_class a(3);
+    unsigned int b = 2;
+    mpf_class c((-a) >> b); ASSERT_ALWAYS(c == -0.75);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<U, __gmp_expr<T, V>, Op> >
+  {
+    mpf_class a(2), b(3);
+    double c = 5.0;
+    mpf_class d;
+    d = c / (a + b); ASSERT_ALWAYS(d == 1);
+  }
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<V, W>, Op> >
+  {
+    mpf_class a(2), b(3);
+    mpz_class c(4);
+    mpf_class d;
+    d = (a + b) * c; ASSERT_ALWAYS(d == 20);
+  }
+  {
+    mpf_class a(2), b(3);
+    mpq_class c(1, 2), d(1, 4);
+    mpf_class e;
+    e = (a * b) / (c + d); ASSERT_ALWAYS(e == 8);
+  }
+
+  // template <class T, class U, class V, class W, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<U, V>, __gmp_expr<T, W>, Op> >
+  {
+    mpf_class a(1), b(2);
+    mpq_class c(3);
+    mpf_class d(c / (a + b)); ASSERT_ALWAYS(d == 1);
+  }
+  {
+    mpf_class a(1);
+    mpz_class b(2);
+    mpq_class c(3, 4);
+    mpf_class d;
+    d = (-c) + (a + b); ASSERT_ALWAYS(d == 2.25);
+  }
+
+  // template <class T, class U, class V, class Op>
+  // __gmp_expr<T, __gmp_binary_expr<__gmp_expr<T, U>, __gmp_expr<T, V>, Op> >
+  {
+    mpf_class a(1), b(2), c(3);
+    mpf_class d;
+    d = (a + b) * (-c); ASSERT_ALWAYS(d == -9);
+  }
+}
+
+
+int
+main (void)
+{
+  tests_start();
+
+  check_mpz();
+  check_mpq();
+  check_mpf();
+
+  tests_end();
+  return 0;
+}