Imported gcc-4.4.3

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

diff --git a/mpfr/tests/teq.c b/mpfr/tests/teq.c
new file mode 100644 (file)
index 0000000..b47a848
--- /dev/null
+++ b/mpfr/tests/teq.c
@@ -0,0 +1,208 @@
+/* Test file for mpfr_eq.
+
+Copyright 1999, 2000, 2001, 2002, 2003, 2004, 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>
+
+#include "mpfr-test.h"
+
+static void
+teq (mpfr_t x)
+{
+  mpfr_t y;
+  unsigned long k, px, mx;
+
+  mpfr_init2 (y, MPFR_PREC(x));
+
+  mx = (MPFR_PREC(x) - 1) / mp_bits_per_limb;
+  px = mp_bits_per_limb - 2;
+
+  for (k = 2; k < MPFR_PREC(x); k++)
+    {
+      mpfr_set (y, x, GMP_RNDN);
+
+      MPFR_MANT(y) [mx] ^= (mp_limb_t) 1 << px;
+
+      if (mpfr_eq(y, x, k) || !mpfr_eq(y, x, k - 1))
+        {
+          printf ("Error in eq.\n");
+          printf ("x = "); mpfr_print_binary (x); printf ("\n");
+          printf ("y = "); mpfr_print_binary (y); printf ("\n");
+          printf ("k = %lu\n", k);
+          printf ("mpfr_eq(y, x, k) = %d\nmpfr_eq(y, x, k - 1) = %d\n",
+                  mpfr_eq (y, x, k), mpfr_eq (y, x, k - 1));
+          exit (1);
+        }
+
+      if (px)
+        {
+          --px;
+        }
+      else
+        {
+          --mx;
+          px = mp_bits_per_limb - 1;
+        }
+    }
+  mpfr_clear (y);
+}
+
+static void
+special (void)
+{
+  mpfr_t x, y, z;
+  int i, error = 0;
+
+  mpfr_init2 (x, 53);
+  mpfr_init2 (y, 53);
+  mpfr_init2 (z, 53);
+
+  mpfr_set_str (x, "1", 10, (mp_rnd_t) 0);
+  mpfr_set_str (y, "1e-10000", 10, (mp_rnd_t) 0);
+  mpfr_add (z, x, y, GMP_RNDU);
+
+  for (i = 1; i <= 52; i++)
+    if (mpfr_eq (x, z, i) == 0)
+      error = 1;
+  for (i = 53; i <= 100; i++)
+    if (mpfr_eq (x, z, i) != 0)
+      error = 1;
+  if (mpfr_eq (x, z, 1000) != 0)
+    error = 1;
+
+  if (error)
+    {
+      printf ("Error in mpfr_eq (1, 1+1e-1000)\n");
+      exit (1);
+    }
+
+  mpfr_set_nan (x);
+  mpfr_set_nan (y);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+  mpfr_set_inf (y, 1);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+  mpfr_set_ui (y, 0, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+  mpfr_set_inf (x, 1);
+  mpfr_set_inf (y, 1);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+  mpfr_set_inf (x, 1);
+  mpfr_set_inf (y, -1);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+  mpfr_set_inf (x, -1);
+  mpfr_set_inf (y, -1);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+  mpfr_set_inf (x, 1);
+  mpfr_set_ui (y, 0, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+  mpfr_set_ui (x, 1, GMP_RNDN);
+  mpfr_set_ui (y, 0, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+  MPFR_ASSERTN(mpfr_eq (y, x, 1) == 0);
+
+  mpfr_set_ui (x, 0, GMP_RNDN);
+  mpfr_set_ui (y, 0, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+  mpfr_neg (y, y, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+  mpfr_neg (x, x, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+  mpfr_set_ui (x, 1, GMP_RNDN);
+  mpfr_neg (y, x, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+  mpfr_set_prec (x, 2 * mp_bits_per_limb);
+  mpfr_set_prec (y, mp_bits_per_limb);
+  mpfr_set_ui (x, 1, GMP_RNDN);
+  mpfr_set_ui (y, 1, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb - 1));
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb));
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1));
+  MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb - 1));
+  MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb));
+  MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb + 1));
+
+  mpfr_nextabove (x);
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb - 1));
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb));
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1));
+  MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb - 1));
+  MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb) == 0);
+  MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb + 1) == 0);
+  MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb - 1));
+  MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb));
+  MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb + 1));
+  MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb - 1));
+  MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb) == 0);
+  MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb + 1) == 0);
+
+  mpfr_set_ui (x, 1, GMP_RNDN);
+  mpfr_set_ui (y, 2, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+  mpfr_set_prec (x, 2 * mp_bits_per_limb);
+  mpfr_set_prec (y, 2 * mp_bits_per_limb);
+  mpfr_set_ui (x, 2, GMP_RNDN);
+  mpfr_set_ui (y, 3, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_eq (x, y, 1));
+  MPFR_ASSERTN(mpfr_eq (x, y, 2) == 0);
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb) == 0);
+  MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1) == 0);
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+  mpfr_clear (z);
+}
+
+int
+main (void)
+{
+  int j;
+  mpfr_t x;
+
+  tests_start_mpfr ();
+
+  special ();
+
+  mpfr_init2 (x, 500);
+
+  for (j = 0; j < 500; j++)
+    {
+      mpfr_urandomb (x, RANDS);
+      teq (x);
+    }
+
+  mpfr_clear (x);
+
+  tests_end_mpfr ();
+  return 0;
+}