Imported gcc-4.4.3

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

diff --git a/mpfr/tests/tcan_round.c b/mpfr/tests/tcan_round.c
new file mode 100644 (file)
index 0000000..c7e59ce
--- /dev/null
+++ b/mpfr/tests/tcan_round.c
@@ -0,0 +1,110 @@
+/* Test file for mpfr_can_round.
+
+Copyright 1999, 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"
+
+#define MAX_LIMB_SIZE 100
+
+static void
+check_round_p (void)
+{
+  mp_limb_t buf[MAX_LIMB_SIZE];
+  mp_size_t n, i;
+  mp_prec_t p;
+  mp_exp_t err;
+  int r1, r2;
+
+  for (n = 2 ; n <= MAX_LIMB_SIZE ; n++)
+    {
+      /* avoid mpn_random which leaks memory */
+      for (i = 0; i < n; i++)
+        buf[i] = randlimb ();
+      p = (mp_prec_t) randlimb() % ((n-1) * BITS_PER_MP_LIMB) + MPFR_PREC_MIN;
+      err = p + randlimb () % BITS_PER_MP_LIMB;
+      r1 = mpfr_round_p (buf, n, err, p);
+      r2 = mpfr_can_round_raw (buf, n, MPFR_SIGN_POS, err,
+                               GMP_RNDN, GMP_RNDZ, p);
+      if (r1 != r2)
+        {
+          printf ("mpfr_round_p(%d) != mpfr_can_round(%d)!\n"
+                  "bn = %ld, err0 = %ld, prec = %lu\nbp = ",
+                  r1, r2, n, err, (unsigned long) p);
+          gmp_printf ("%NX\n", buf, n);
+          exit (1);
+        }
+    }
+}
+
+int
+main (void)
+{
+  mpfr_t x;
+  mp_prec_t i, j;
+
+  tests_start_mpfr ();
+
+  /* checks that rounds to nearest sets the last
+     bit to zero in case of equal distance */
+  mpfr_init2 (x, 59);
+  mpfr_set_str_binary (x, "-0.10010001010111000011110010111010111110000000111101100111111E663");
+  if (mpfr_can_round (x, 54, GMP_RNDZ, GMP_RNDZ, 53) != 0)
+    {
+      printf ("Error (1) in mpfr_can_round\n");
+      exit (1);
+    }
+
+  mpfr_set_str_binary (x, "-Inf");
+  if (mpfr_can_round (x, 2000, GMP_RNDZ, GMP_RNDZ, 2000) != 0)
+    {
+      printf ("Error (2) in mpfr_can_round\n");
+      exit (1);
+    }
+
+  mpfr_set_prec (x, 64);
+  mpfr_set_str_binary (x, "0.1011001000011110000110000110001111101011000010001110011000000000");
+  if (mpfr_can_round (x, 65, GMP_RNDN, GMP_RNDN, 54))
+    {
+      printf ("Error (3) in mpfr_can_round\n");
+      exit (1);
+    }
+
+  mpfr_set_prec (x, 62);
+  mpfr_set_str (x, "0.ff4ca619c76ba69", 16, GMP_RNDZ);
+  for (i = 30; i < 99; i++)
+    for (j = 30; j < 99; j++)
+      {
+        int r1, r2;
+        for (r1 = 0; r1 < GMP_RND_MAX ; r1++)
+          for (r2 = 0; r2 < GMP_RND_MAX ; r2++)
+            mpfr_can_round (x, i, (mp_rnd_t) r1, (mp_rnd_t) r2, j); /* test for assertions */
+      }
+
+  mpfr_clear (x);
+
+  check_round_p ();
+
+  tests_end_mpfr ();
+  return 0;
+}