Imported gcc-4.4.3

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

diff --git a/mpfr/tests/tdiv_d.c b/mpfr/tests/tdiv_d.c
new file mode 100644 (file)
index 0000000..ca22d26
--- /dev/null
+++ b/mpfr/tests/tdiv_d.c
@@ -0,0 +1,137 @@
+/* Test file for mpfr_div_d
+
+Copyright 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 <float.h>
+
+#include "mpfr-test.h"
+
+#if MPFR_VERSION >= MPFR_VERSION_NUM(2,4,0)
+
+static void
+check_nans (void)
+{
+  mpfr_t  x, y;
+  int inexact;
+
+  mpfr_init2 (x, 123);
+  mpfr_init2 (y, 123);
+
+  /* nan / 1.0 is nan */
+  mpfr_set_nan (x);
+  mpfr_clear_flags ();
+  inexact = mpfr_div_d (y, x, 1.0, GMP_RNDN);
+  MPFR_ASSERTN (inexact == 0);
+  MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0);
+  MPFR_ASSERTN (mpfr_nan_p (y));
+
+  /* +inf / 1.0 == +inf */
+  mpfr_set_inf (x, 1);
+  mpfr_clear_flags ();
+  inexact = mpfr_div_d (y, x, 1.0, GMP_RNDN);
+  MPFR_ASSERTN (inexact == 0);
+  MPFR_ASSERTN (__gmpfr_flags == 0);
+  MPFR_ASSERTN (mpfr_inf_p (y));
+  MPFR_ASSERTN (MPFR_IS_POS (y));
+
+  /* -inf / 1.0 == -inf */
+  mpfr_set_inf (x, -1);
+  mpfr_clear_flags ();
+  inexact = mpfr_div_d (y, x, 1.0, GMP_RNDN);
+  MPFR_ASSERTN (inexact == 0);
+  MPFR_ASSERTN (__gmpfr_flags == 0);
+  MPFR_ASSERTN (mpfr_inf_p (y));
+  MPFR_ASSERTN (MPFR_IS_NEG (y));
+
+  /* 0.0 / 0.0 is nan */
+  mpfr_set_d (x, 0.0, GMP_RNDN);
+  mpfr_clear_flags ();
+  inexact = mpfr_div_d (y, x, 0.0, GMP_RNDN);
+  MPFR_ASSERTN (inexact == 0);
+  MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0);
+  MPFR_ASSERTN (mpfr_nan_p (y));
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+#define TEST_FUNCTION mpfr_sub_d
+#define DOUBLE_ARG2
+#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1)
+#include "tgeneric.c"
+
+int
+main (void)
+{
+  mpfr_t x, y, z;
+  double d;
+  int inexact;
+
+  tests_start_mpfr ();
+
+  /* check with enough precision */
+  mpfr_init2 (x, IEEE_DBL_MANT_DIG);
+  mpfr_init2 (y, IEEE_DBL_MANT_DIG);
+  mpfr_init2 (z, IEEE_DBL_MANT_DIG);
+
+  mpfr_set_str (y, "4096", 10, GMP_RNDN);
+  d = 0.125;
+  mpfr_clear_flags ();
+  inexact = mpfr_div_d (x, y, d, GMP_RNDN);
+  if (inexact != 0)
+    {
+      printf ("Inexact flag error in mpfr_div_d\n");
+      exit (1);
+    }
+  mpfr_set_str (z, "32768", 10, GMP_RNDN);
+  if (mpfr_cmp (z, x))
+    {
+      printf ("Error in mpfr_div_d (");
+      mpfr_out_str (stdout, 10, 0, y, GMP_RNDN);
+      printf (" + %.20g)\nexpected ", d);
+      mpfr_out_str (stdout, 10, 0, z, GMP_RNDN);
+      printf ("\ngot     ");
+      mpfr_out_str (stdout, 10, 0, x, GMP_RNDN);
+      printf ("\n");
+      exit (1);
+    }
+  mpfr_clears (x, y, z, (mpfr_ptr) 0);
+
+  check_nans ();
+
+  test_generic (2, 1000, 100);
+
+  tests_end_mpfr ();
+  return 0;
+}
+
+#else
+
+int
+main (void)
+{
+  printf ("Warning! Test disabled for this MPFR version.\n");
+  return 0;
+}
+
+#endif