Imported gcc-4.4.3

[msp430-gcc.git] / gmp / tests / mpf / t-dm2exp.c

diff --git a/gmp/tests/mpf/t-dm2exp.c b/gmp/tests/mpf/t-dm2exp.c
new file mode 100644 (file)
index 0000000..da43e28
--- /dev/null
+++ b/gmp/tests/mpf/t-dm2exp.c
@@ -0,0 +1,119 @@
+/* Test mpf_div, mpf_div_2exp, mpf_mul_2exp.
+
+Copyright 1996, 2000, 2001 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 <stdio.h>
+#include <stdlib.h>
+
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "tests.h"
+
+#ifndef SIZE
+#define SIZE 16
+#endif
+
+int
+main (int argc, char **argv)
+{
+  int reps = 100000;
+  int i;
+  mpf_t u, v, w1, w2, w3;
+  mp_size_t bprec = 100;
+  mpf_t rerr, limit_rerr;
+  mp_size_t un;
+  mp_exp_t ue;
+
+  tests_start ();
+
+  if (argc > 1)
+    {
+      reps = strtol (argv[1], 0, 0);
+      if (argc > 2)
+       bprec = strtol (argv[2], 0, 0);
+    }
+
+  mpf_set_default_prec (bprec);
+
+  mpf_init (rerr);
+  mpf_init (limit_rerr);
+
+  mpf_init (u);
+  mpf_init (v);
+  mpf_init (w1);
+  mpf_init (w2);
+  mpf_init (w3);
+
+  for (i = 0; i < reps; i++)
+    {
+      unsigned long int res_prec;
+      unsigned long int pow2;
+
+      res_prec = urandom () % (bprec + 100);
+      mpf_set_prec (w1, res_prec);
+      mpf_set_prec (w2, res_prec);
+      mpf_set_prec (w3, res_prec);
+
+      mpf_set_ui (limit_rerr, 1);
+      mpf_div_2exp (limit_rerr, limit_rerr, res_prec);
+
+      pow2 = urandom () % 0x10000;
+      mpf_set_ui (v, 1);
+      mpf_mul_2exp (v, v, pow2);
+
+      un = urandom () % (2 * SIZE) - SIZE;
+      ue = urandom () % SIZE;
+      mpf_random2 (u, un, ue);
+
+      mpf_div_2exp (w1, u, pow2);
+      mpf_div (w2, u, v);
+      mpf_reldiff (rerr, w1, w2);
+      if (mpf_cmp (rerr, limit_rerr) > 0)
+       {
+         printf ("ERROR in mpf_div or mpf_div_2exp after %d tests\n", i);
+         printf ("   u = "); mpf_dump (u);
+         printf ("   v = "); mpf_dump (v);
+         printf ("  w1 = "); mpf_dump (w1);
+         printf ("  w2 = "); mpf_dump (w2);
+         abort ();
+       }
+      mpf_mul_2exp (w3, w1, pow2);
+      mpf_reldiff (rerr, u, w3);
+      if (mpf_cmp (rerr, limit_rerr) > 0)
+       {
+         printf ("ERROR in mpf_mul_2exp after %d tests\n", i);
+         printf ("   u = "); mpf_dump (u);
+         printf ("   v = "); mpf_dump (v);
+         printf ("  w1 = "); mpf_dump (w1);
+         printf ("  w3 = "); mpf_dump (w3);
+         abort ();
+       }
+    }
+
+  mpf_clear (rerr);
+  mpf_clear (limit_rerr);
+
+  mpf_clear (u);
+  mpf_clear (v);
+  mpf_clear (w1);
+  mpf_clear (w2);
+  mpf_clear (w3);
+
+  tests_end ();
+  exit (0);
+}