Imported gcc-4.4.3

[msp430-gcc.git] / mpfr / tests / tinternals.c

diff --git a/mpfr/tests/tinternals.c b/mpfr/tests/tinternals.c
new file mode 100644 (file)
index 0000000..f055ad4
--- /dev/null
+++ b/mpfr/tests/tinternals.c
@@ -0,0 +1,141 @@
+/* tinternals -- Test for internals.
+
+Copyright 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR 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 2.1 of the License, or (at your
+option) any later version.
+
+The GNU MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+MA 02110-1301, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define MPFR_NEED_LONGLONG_H
+#include "mpfr-test.h"
+
+static void
+test_int_ceil_log2 (void)
+{
+  int i;
+  int val[16] = { 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 };
+
+  for (i = 1; i < 17; i++)
+    {
+      if (MPFR_INT_CEIL_LOG2 (i) != val[i-1])
+        {
+          printf ("Error 1 in test_int_ceil_log2 for i = %d\n", i);
+          exit (1);
+        }
+      if (MPFR_INT_CEIL_LOG2 (i) != __gmpfr_int_ceil_log2 (i))
+        {
+          printf ("Error 2 in test_int_ceil_log2 for i = %d\n", i);
+          exit (1);
+        }
+    }
+}
+
+static void
+test_round_near_x (void)
+{
+  mpfr_t x, y, z, eps;
+  mp_exp_t e;
+  int failures = 0, mx, neg, err, dir, r, inex, inex2;
+  char buffer[7], *p;
+
+  mpfr_inits (x, y, z, eps, (mpfr_ptr) 0);
+  mpfr_set_prec (x, 5);
+  mpfr_set_prec (y, 3);
+  mpfr_set_prec (z, 3);
+  mpfr_set_prec (eps, 2);
+  mpfr_set_ui_2exp (eps, 1, -32, GMP_RNDN);
+
+  for (mx = 16; mx < 32; mx++)
+    {
+      mpfr_set_ui_2exp (x, mx, -2, GMP_RNDN);
+      for (p = buffer, neg = 0;
+           neg <= 1;
+           mpfr_neg (x, x, GMP_RNDN), p++, neg++)
+        for (err = 2; err <= 6; err++)
+          for (dir = 0; dir <= 1; dir++)
+            RND_LOOP(r)
+              {
+                inex = mpfr_round_near_x (y, x, err, dir, (mp_rnd_t) r);
+
+                if (inex == 0 && err < 6)
+                  {
+                    /* The test is more restrictive than necessary.
+                       So, no failure in this case. */
+                    continue;
+                  }
+
+                inex2 = ((dir ^ neg) ? mpfr_add : mpfr_sub)
+                  (z, x, eps, (mp_rnd_t) r);
+                if (inex * inex2 <= 0)
+                  printf ("Bad return value (%d instead of %d) for:\n",
+                          inex, inex2);
+                else if (mpfr_equal_p (y, z))
+                  continue;  /* correct inex and y */
+                else
+                  {
+                    printf ("Bad MPFR value (should have got ");
+                    mpfr_out_str (stdout, 2, 3, z, GMP_RNDZ);
+                    printf (") for:\n");
+                  }
+
+                if (!mpfr_get_str (buffer, &e, 2, 5, x, GMP_RNDZ) || e != 3)
+                  {
+                    printf ("mpfr_get_str failed in test_round_near_x\n");
+                    exit (1);
+                  }
+                printf ("x = %c%c%c%c.%c%c, ", neg ? '-' : '+',
+                        p[0], p[1], p[2], p[3], p[4]);
+                printf ("err = %d, dir = %d, r = %s --> inex = %2d",
+                        err, dir, mpfr_print_rnd_mode ((mp_rnd_t) r), inex);
+                if (inex != 0)
+                  {
+                    printf (", y = ");
+                    mpfr_out_str (stdout, 2, 3, y, GMP_RNDZ);
+                  }
+                printf ("\n");
+                if (inex == 0)
+                  printf ("Rounding was possible!\n");
+                if (++failures == 10)  /* show at most 10 failures */
+                  exit (1);
+              }
+    }
+
+  if (failures)
+    exit (1);
+
+  mpfr_clears (x, y, z, eps, (mpfr_ptr) 0);
+}
+
+int
+main (int argc, char **argv)
+{
+  tests_start_mpfr ();
+
+  /* The tested function and macro exist in MPFR 2.2.0, but with a
+     different (incorrect, but with no effect in 2.2.0) behavior. */
+#if MPFR_VERSION >= MPFR_VERSION_NUM(2,3,0)
+  test_int_ceil_log2 ();
+#endif
+
+  test_round_near_x ();
+
+  tests_end_mpfr ();
+  return 0;
+}