Imported gcc-4.4.3

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

diff --git a/mpfr/tests/tabs.c b/mpfr/tests/tabs.c
new file mode 100644 (file)
index 0000000..379cd48
--- /dev/null
+++ b/mpfr/tests/tabs.c
@@ -0,0 +1,176 @@
+/* Test file for mpfr_abs.
+
+Copyright 2000, 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 <float.h>
+
+#include "mpfr-test.h"
+
+static void
+check_inexact (void)
+{
+  mp_prec_t p, q;
+  mpfr_t x, y, absx;
+  int rnd;
+  int inexact, cmp;
+
+  mpfr_init (x);
+  mpfr_init (y);
+  mpfr_init (absx);
+
+  for (p=2; p<500; p++)
+    {
+      mpfr_set_prec (x, p);
+      mpfr_set_prec (absx, p);
+      mpfr_urandomb (x, RANDS);
+      if (randlimb () % 2)
+        {
+          mpfr_set (absx, x, GMP_RNDN);
+          mpfr_neg (x, x, GMP_RNDN);
+        }
+      else
+        mpfr_set (absx, x, GMP_RNDN);
+      for (q=2; q<2*p; q++)
+        {
+          mpfr_set_prec (y, q);
+          RND_LOOP (rnd)
+            {
+              inexact = mpfr_abs (y, x, (mp_rnd_t) rnd);
+              cmp = mpfr_cmp (y, absx);
+              if (((inexact == 0) && (cmp != 0)) ||
+                  ((inexact > 0) && (cmp <= 0)) ||
+                  ((inexact < 0) && (cmp >= 0)))
+                {
+                  printf ("Wrong inexact flag: expected %d, got %d\n",
+                          cmp, inexact);
+                  printf ("x="); mpfr_print_binary (x); puts ("");
+                  printf ("absx="); mpfr_print_binary (absx); puts ("");
+                  printf ("y="); mpfr_print_binary (y); puts ("");
+                  exit (1);
+                }
+            }
+        }
+    }
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+  mpfr_clear (absx);
+}
+
+static void
+check_cmp (int argc, char *argv[])
+{
+  mpfr_t x, y;
+  int n, k;
+
+  mpfr_inits2 (53, x, y, (mpfr_ptr) 0);
+
+  mpfr_set_ui(x, 1, GMP_RNDN);
+  (mpfr_abs) (x, x, GMP_RNDN);
+  if (mpfr_cmp_ui (x, 1))
+    {
+      printf ("Error in mpfr_abs(1.0)\n");
+      exit (1);
+    }
+
+  mpfr_set_si(x, -1, GMP_RNDN);
+  mpfr_abs(x, x, GMP_RNDN);
+  if (mpfr_cmp_ui (x, 1))
+    {
+      printf ("Error in mpfr_abs(1.0)\n");
+      exit (1);
+    }
+
+  mpfr_set_si(x, -1, GMP_RNDN);
+  mpfr_abs(x, x, GMP_RNDN);
+  if (mpfr_cmp_ui (x, 1))
+    {
+      printf ("Error in mpfr_abs(-1.0)\n");
+      exit (1);
+    }
+
+  mpfr_set_inf (x, 1);
+  mpfr_abs (x, x, GMP_RNDN);
+  if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0))
+    {
+      printf ("Error in mpfr_abs(Inf).\n");
+      exit (1);
+    }
+  mpfr_set_inf (x, -1);
+  mpfr_abs (x, x, GMP_RNDN);
+  if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0))
+    {
+      printf ("Error in mpfr_abs(-Inf).\n");
+      exit (1);
+    }
+
+  MPFR_SET_NAN(x);
+  mpfr_abs (x, x, GMP_RNDN);
+  if (!MPFR_IS_NAN(x))
+    {
+      printf ("Error in mpfr_abs(NAN).\n");
+      exit (1);
+    }
+
+  n = (argc==1) ? 25000 : atoi(argv[1]);
+  for (k = 1; k <= n; k++)
+    {
+      mp_rnd_t rnd;
+      int sign = SIGN_RAND ();
+
+      mpfr_urandomb (x, RANDS);
+      MPFR_SET_SIGN (x, sign);
+      rnd = RND_RAND ();
+      mpfr_abs (y, x, rnd);
+      MPFR_SET_POS (x);
+      if (mpfr_cmp (x, y))
+        {
+          printf ("Mismatch for sign=%d and x=", sign);
+          mpfr_print_binary (x);
+          printf ("\nResults=");
+          mpfr_print_binary (y);
+          putchar ('\n');
+          exit (1);
+        }
+    }
+
+  mpfr_clears (x, y, (mpfr_ptr) 0);
+}
+
+#define TEST_FUNCTION mpfr_abs
+#include "tgeneric.c"
+
+int
+main (int argc, char *argv[])
+{
+  mpfr_test_init ();
+  tests_start_mpfr ();
+
+  check_inexact ();
+  check_cmp (argc, argv);
+
+  test_generic (2, 1000, 10);
+
+  tests_end_mpfr ();
+  return 0;
+}