1 files changed, 68 insertions, 0 deletions
diff --git a/mpc/tests/tatan.c b/mpc/tests/tatan.c
new file mode 100644
index 0000000000..8883588bd1
--- /dev/null
+++ b/mpc/tests/tatan.c
@@ -0,0 +1,68 @@
+/* tatan -- test file for mpc_atan.
+
+Copyright (C) 2009, 2012 INRIA
+
+This file is part of GNU MPC.
+
+GNU MPC 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.
+
+GNU MPC 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 this program. If not, see http://www.gnu.org/licenses/ .
+*/
+
+#include "mpc-tests.h"
+
+#if 0
+/* tests intermediate underflow; WONTFIX */
+static int
+test_underflow (void)
+{
+  mpc_t z;
+  mpfr_exp_t emin = mpfr_get_emin ();
+
+  mpfr_set_emin (-10);
+  mpc_init2 (z, 21);
+  mpfr_set_si (mpc_realref(z), -1, GMP_RNDZ);
+  mpfr_set_ui_2exp (mpc_imagref(z), 1, 20, GMP_RNDZ);
+  mpfr_add_ui (mpc_imagref(z), mpc_imagref(z), 1, GMP_RNDZ);
+  mpfr_div_2exp (mpc_imagref(z), mpc_imagref(z), 20, GMP_RNDZ);
+  mpc_atan (z, z, MPC_RNDNN);
+  if (mpfr_cmp_si_2exp (mpc_realref(z), -1066635, 20) != 0 ||
+      mpfr_cmp_si_2exp (mpc_imagref(z), 1687619, 22))
+    {
+      printf ("Error in test_coverage\n");
+      printf ("expected (-1066635/2^20 1687619/2^22)\n");
+      printf ("got      ");
+      mpc_out_str (stdout, 10, 20, z, MPC_RNDNN);
+      printf ("\n");
+      exit (1);
+    }
+  mpc_clear (z);
+  mpfr_set_emin (emin);
+}
+#endif
+
+
+int
+main (void)
+{
+  DECL_FUNC (CC, f, mpc_atan);
+
+  test_start ();
+
+  data_check (f, "atan.dat");
+  tgeneric (f, 2, 512, 5, 128);
+
+  test_end ();
+
+  return 0;
+}
+