1 files changed, 110 insertions, 0 deletions
diff --git a/mpc/tests/tnorm.c b/mpc/tests/tnorm.c
new file mode 100644
index 0000000000..3f4dccdcd0
--- /dev/null
+++ b/mpc/tests/tnorm.c
@@ -0,0 +1,110 @@
+/* tnorm -- test file for mpc_norm.
+
+Copyright (C) 2008, 2011 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
+test_underflow (void)
+{
+  mpfr_exp_t emin = mpfr_get_emin ();
+  mpc_t z;
+  mpfr_t f;
+  int inex;
+  
+  mpfr_set_emin (-1); /* smallest positive number is 0.5*2^emin = 0.25 */
+  mpc_init2 (z, 10);
+  mpfr_set_ui_2exp (mpc_realref (z), 1023, -11, GMP_RNDN); /* exact */
+  mpfr_set_ui_2exp (mpc_imagref (z), 1023, -11, GMP_RNDN); /* exact */
+  mpfr_init2 (f, 10);
+
+  inex = mpc_norm (f, z, GMP_RNDZ); /* should give 511/1024 */
+  if (inex >= 0)
+    {
+      printf ("Error in underflow case (1)\n");
+      printf ("expected inex < 0, got %d\n", inex);
+      exit (1);
+    }
+  if (mpfr_cmp_ui_2exp (f, 511, -10) != 0)
+    {
+      printf ("Error in underflow case (1)\n");
+      printf ("got      ");
+      mpfr_dump (f);
+      printf ("expected ");
+      mpfr_set_ui_2exp (f, 511, -10, GMP_RNDZ);
+      mpfr_dump (f);
+      exit (1);
+    }
+
+  inex = mpc_norm (f, z, GMP_RNDN); /* should give 511/1024 */
+  if (inex >= 0)
+    {
+      printf ("Error in underflow case (2)\n");
+      printf ("expected inex < 0, got %d\n", inex);
+      exit (1);
+    }
+  if (mpfr_cmp_ui_2exp (f, 511, -10) != 0)
+    {
+      printf ("Error in underflow case (2)\n");
+      printf ("got      ");
+      mpfr_dump (f);
+      printf ("expected ");
+      mpfr_set_ui_2exp (f, 511, -10, GMP_RNDZ);
+      mpfr_dump (f);
+      exit (1);
+    }
+
+  inex = mpc_norm (f, z, GMP_RNDU); /* should give 1023/2048 */
+  if (inex <= 0)
+    {
+      printf ("Error in underflow case (3)\n");
+      printf ("expected inex > 0, got %d\n", inex);
+      exit (1);
+    }
+  if (mpfr_cmp_ui_2exp (f, 1023, -11) != 0)
+    {
+      printf ("Error in underflow case (3)\n");
+      printf ("got      ");
+      mpfr_dump (f);
+      printf ("expected ");
+      mpfr_set_ui_2exp (f, 1023, -11, GMP_RNDZ);
+      mpfr_dump (f);
+      exit (1);
+    }
+
+  mpc_clear (z);
+  mpfr_clear (f);
+  mpfr_set_emin (emin);
+}
+
+int
+main (void)
+{
+  DECL_FUNC (FC, f, mpc_norm);
+
+  test_start ();
+
+  data_check (f, "norm.dat");
+  tgeneric (f, 2, 1024, 1, 4096);
+  test_underflow ();
+
+  test_end ();
+
+  return 0;
+}