1 files changed, 57 insertions, 0 deletions
diff --git a/mpc/tests/tatanh.c b/mpc/tests/tatanh.c
new file mode 100644
index 0000000000..ddba68c99a
--- /dev/null
+++ b/mpc/tests/tatanh.c
@@ -0,0 +1,57 @@
+/* tatanh -- test file for mpc_atanh.
+
+Copyright (C) 2009 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"
+
+static void
+bug20091120 (void)
+{
+  mpc_t x, y;
+
+  mpc_init2 (x, 53);
+  mpc_init3 (y, 17, 42);
+  mpc_set_ui_ui (x, 1, 1, MPC_RNDNN);
+  mpc_atanh (y, x, MPC_RNDNN);
+  if (mpfr_get_prec (mpc_realref(y)) != 17 ||
+      mpfr_get_prec (mpc_imagref(y)) != 42)
+    {
+      printf ("Error, mpc_atanh changed the precisions!!!\n");
+      exit (1);
+    }
+  mpc_clear (x);
+  mpc_clear (y);
+}
+
+int
+main (void)
+{
+  DECL_FUNC (CC, f, mpc_atanh);
+
+  test_start ();
+
+  bug20091120 ();
+
+  data_check (f, "atanh.dat");
+  tgeneric (f, 2, 512, 5, 128);
+
+  test_end ();
+
+  return 0;
+}