Imported gcc-4.4.3

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

diff --git a/mpfr/tests/tset_z.c b/mpfr/tests/tset_z.c
new file mode 100644 (file)
index 0000000..81bb90d
--- /dev/null
+++ b/mpfr/tests/tset_z.c
@@ -0,0 +1,142 @@
+/* Test file for mpfr_set_z.
+
+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 <limits.h>
+
+#include "mpfr-test.h"
+
+static void check0(void)
+{
+  mpz_t y;
+  mpfr_t x;
+  int inexact, r;
+
+  /* Check for +0 */
+  mpfr_init (x);
+  mpz_init (y);
+  mpz_set_si (y, 0);
+  for(r = 0; r < GMP_RND_MAX; r++)
+    {
+      inexact = mpfr_set_z (x, y, (mp_rnd_t) r);
+      if (!MPFR_IS_ZERO(x) || !MPFR_IS_POS(x) || inexact)
+        {
+          printf("mpfr_set_z(x,0) failed for %s\n",
+                 mpfr_print_rnd_mode ((mp_rnd_t) r));
+          exit(1);
+        }
+    }
+  mpfr_clear(x);
+  mpz_clear(y);
+}
+
+/* FIXME: It'd be better to examine the actual data in an mpfr_t to see that
+   it's as expected.  Comparing mpfr_set_z with mpfr_cmp or against
+   mpfr_get_si is a rather indirect test of a low level routine.  */
+
+static void
+check (long i, mp_rnd_t rnd)
+{
+  mpfr_t f;
+  mpz_t z;
+
+  mpfr_init2 (f, 8 * sizeof(long));
+  mpz_init (z);
+  mpz_set_ui (z, i);
+  mpfr_set_z (f, z, rnd);
+  if (mpfr_get_si (f, GMP_RNDZ) != i)
+    {
+      printf ("Error in mpfr_set_z for i=%ld rnd_mode=%d\n", i, rnd);
+      exit (1);
+    }
+  mpfr_clear (f);
+  mpz_clear (z);
+}
+
+static void
+check_large (void)
+{
+  mpz_t z;
+  mpfr_t x, y;
+  mp_exp_t emax, emin;
+
+  mpz_init (z);
+  mpfr_init2 (x, 160);
+  mpfr_init2 (y, 160);
+
+  mpz_set_str (z, "77031627725494291259359895954016675357279104942148788042", 10);
+  mpfr_set_z (x, z, GMP_RNDN);
+  mpfr_set_str_binary (y, "0.1100100100001111110110101010001000100001011010001100001000110100110001001100011001100010100010111000000011011100000111001101000100101001000000100100111000001001E186");
+  if (mpfr_cmp (x, y))
+    {
+      printf ("Error in mpfr_set_z on large input\n");
+      exit (1);
+    }
+
+  /* check overflow */
+  emax = mpfr_get_emax ();
+  set_emax (2);
+  mpz_set_str (z, "7", 10);
+  mpfr_set_z (x, z, GMP_RNDU);
+  MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0);
+  set_emax (3);
+  mpfr_set_prec (x, 2);
+  mpz_set_str (z, "7", 10);
+  mpfr_set_z (x, z, GMP_RNDU);
+  MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0);
+  set_emax (emax);
+
+  /* check underflow */
+  emin = mpfr_get_emin ();
+  set_emin (3);
+  mpz_set_str (z, "1", 10);
+  mpfr_set_z (x, z, GMP_RNDZ);
+  MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x));
+  set_emin (2);
+  mpfr_set_z (x, z, GMP_RNDN);
+  MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x));
+  set_emin (emin);
+
+  mpz_clear (z);
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+int
+main (int argc, char *argv[])
+{
+  long j;
+
+  tests_start_mpfr ();
+
+  check_large ();
+  check (0, GMP_RNDN);
+  for (j = 0; j < 200000; j++)
+    check (randlimb () & LONG_MAX, RND_RAND ());
+  check0 ();
+
+  tests_end_mpfr ();
+
+  return 0;
+}