Imported gcc-4.4.3

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

diff --git a/mpfr/tests/tconst_pi.c b/mpfr/tests/tconst_pi.c
new file mode 100644 (file)
index 0000000..1e18db1
--- /dev/null
+++ b/mpfr/tests/tconst_pi.c
@@ -0,0 +1,127 @@
+/* Test file for mpfr_const_pi.
+
+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"
+
+/* tconst_pi [prec] [rnd] [0 = no print] */
+
+static void
+check_large (void)
+{
+  mpfr_t x, y, z;
+
+  mpfr_init2 (x, 20000);
+  mpfr_init2 (y, 21000);
+  mpfr_init2 (z, 11791);
+
+  /* The algo failed to round for p=11791. */
+  (mpfr_const_pi) (z, GMP_RNDU);
+  mpfr_const_pi (x, GMP_RNDN); /* First one ! */
+  mpfr_const_pi (y, GMP_RNDN); /* Then the other - cache - */
+  mpfr_prec_round (y, 20000, GMP_RNDN);
+  if (mpfr_cmp (x, y)) {
+    printf ("const_pi: error for large prec (%d)\n", 1);
+    exit (1);
+  }
+  mpfr_prec_round (y, 11791, GMP_RNDU);
+  if (mpfr_cmp (z, y)) {
+    printf ("const_pi: error for large prec (%d)\n", 2);
+    exit (1);
+  }
+
+  /* a worst-case to exercise recomputation */
+  if (MPFR_PREC_MAX > 33440) {
+    mpfr_set_prec (x, 33440);
+    mpfr_const_pi (x, GMP_RNDZ);
+  }
+
+  mpfr_clears (x, y, z, (mpfr_ptr) 0);
+}
+
+/* Wrapper for tgeneric */
+static int
+my_const_pi (mpfr_ptr x, mpfr_srcptr y, mp_rnd_t r)
+{
+  return mpfr_const_pi (x, r);
+}
+
+#define RAND_FUNCTION(x) mpfr_set_ui ((x), 0, GMP_RNDN)
+#define TEST_FUNCTION my_const_pi
+#include "tgeneric.c"
+
+int
+main (int argc, char *argv[])
+{
+  mpfr_t x;
+  mp_prec_t p;
+  mp_rnd_t rnd;
+
+  tests_start_mpfr ();
+
+  p = 53;
+  if (argc > 1)
+    {
+      long a = atol (argv[1]);
+      if (a >= MPFR_PREC_MIN && a <= MPFR_PREC_MAX)
+        p = a;
+    }
+
+  rnd = (argc > 2) ? (mp_rnd_t) atoi(argv[2]) : GMP_RNDZ;
+
+  mpfr_init2 (x, p);
+  mpfr_const_pi (x, rnd);
+  if (argc >= 2)
+    {
+      if (argc < 4 || atoi (argv[3]) != 0)
+        {
+          printf ("Pi=");
+          mpfr_out_str (stdout, 10, 0, x, rnd);
+          puts ("");
+        }
+    }
+  else if (mpfr_cmp_str1 (x, "3.141592653589793116") )
+    {
+      printf ("mpfr_const_pi failed for prec=53\n");
+      mpfr_out_str (stdout, 10, 0, x, GMP_RNDN); putchar('\n');
+      exit (1);
+    }
+
+  mpfr_set_prec (x, 32);
+  mpfr_const_pi (x, GMP_RNDN);
+  if (mpfr_cmp_str1 (x, "3.141592653468251") )
+    {
+      printf ("mpfr_const_pi failed for prec=32\n");
+      exit (1);
+    }
+
+  mpfr_clear (x);
+
+  check_large();
+
+  test_generic (2, 200, 1);
+
+  tests_end_mpfr ();
+  return 0;
+}