Imported gcc-4.4.3

[msp430-gcc.git] / gmp / tests / mpz / t-get_d.c

diff --git a/gmp/tests/mpz/t-get_d.c b/gmp/tests/mpz/t-get_d.c
new file mode 100644 (file)
index 0000000..41c0ba8
--- /dev/null
+++ b/gmp/tests/mpz/t-get_d.c
@@ -0,0 +1,74 @@
+/* Test mpz_get_d.
+
+Copyright 2002 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 3 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "tests.h"
+
+
+void
+check_onebit (void)
+{
+  int     i;
+  mpz_t   z;
+  double  got, want;
+  /* FIXME: It'd be better to base this on the float format. */
+#ifdef __vax
+  int     limit = 127;  /* vax fp numbers have limited range */
+#else
+  int     limit = 512;
+#endif
+
+  mpz_init (z);
+
+  mpz_set_ui (z, 1L);
+  want = 1.0;
+
+  for (i = 0; i < limit; i++)
+    {
+      got = mpz_get_d (z);
+
+      if (got != want)
+        {
+          printf    ("mpz_get_d wrong on 2**%d\n", i);
+          mpz_trace ("   z    ", z);
+          printf    ("   want  %.20g\n", want);
+          printf    ("   got   %.20g\n", got);
+          abort();
+        }
+
+      mpz_mul_2exp (z, z, 1L);
+      want *= 2.0;
+    }
+  mpz_clear (z);
+}
+
+
+int
+main (void)
+{
+  tests_start ();
+
+  check_onebit ();
+
+  tests_end ();
+  exit (0);
+}