Imported gcc-4.4.3

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

diff --git a/mpfr/tests/tsech.c b/mpfr/tests/tsech.c
new file mode 100644 (file)
index 0000000..1ba9e7a
--- /dev/null
+++ b/mpfr/tests/tsech.c
@@ -0,0 +1,190 @@
+/* Test file for mpfr_sech.
+
+Copyright 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"
+
+#define TEST_FUNCTION mpfr_sech
+#define TEST_RANDOM_EMIN -64
+#define TEST_RANDOM_EMAX 36
+#include "tgeneric.c"
+
+static void
+check_specials (void)
+{
+  mpfr_t  x, y;
+
+  mpfr_init2 (x, 123L);
+  mpfr_init2 (y, 123L);
+
+  mpfr_set_nan (x);
+  mpfr_sech (y, x, GMP_RNDN);
+  if (! mpfr_nan_p (y))
+    {
+      printf ("Error: sech(NaN) != NaN\n");
+      exit (1);
+    }
+
+  mpfr_set_inf (x, 1);
+  mpfr_sech (y, x, GMP_RNDN);
+  if (! (MPFR_IS_ZERO (y) && MPFR_SIGN (y) > 0))
+    {
+      printf ("Error: sech(+Inf) != +0\n");
+      exit (1);
+    }
+
+  mpfr_set_inf (x, -1);
+  mpfr_sech (y, x, GMP_RNDN);
+  if (! (MPFR_IS_ZERO (y) && MPFR_SIGN (y) > 0))
+    {
+      printf ("Error: sech(-Inf) != +0\n");
+      exit (1);
+    }
+
+  /* sec(+/-0) = 1 */
+  mpfr_set_ui (x, 0, GMP_RNDN);
+  mpfr_sech (y, x, GMP_RNDN);
+  if (mpfr_cmp_ui (y, 1))
+    {
+      printf ("Error: sech(+0) != 1\n");
+      exit (1);
+    }
+  mpfr_neg (x, x, GMP_RNDN);
+  mpfr_sech (y, x, GMP_RNDN);
+  if (mpfr_cmp_ui (y, 1))
+    {
+      printf ("Error: sech(-0) != 1\n");
+      exit (1);
+    }
+
+  /* check huge x */
+  mpfr_set_str (x, "8e8", 10, GMP_RNDN);
+  mpfr_sech (y, x, GMP_RNDN);
+  if (! (mpfr_zero_p (y) && MPFR_SIGN (y) > 0))
+    {
+      printf ("Error: sech(8e8) != +0\n");
+      exit (1);
+    }
+  mpfr_set_str (x, "-8e8", 10, GMP_RNDN);
+  mpfr_sech (y, x, GMP_RNDN);
+  if (! (mpfr_zero_p (y) && MPFR_SIGN (y) > 0))
+    {
+      printf ("Error: sech(-8e8) != +0\n");
+      exit (1);
+    }
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+static void
+overflowed_sech0 (void)
+{
+  mpfr_t x, y;
+  int emax, i, inex, rnd, err = 0;
+  mp_exp_t old_emax;
+
+  old_emax = mpfr_get_emax ();
+
+  mpfr_init2 (x, 8);
+  mpfr_init2 (y, 8);
+
+  for (emax = -1; emax <= 0; emax++)
+    {
+      mpfr_set_ui_2exp (y, 1, emax, GMP_RNDN);
+      mpfr_nextbelow (y);
+      set_emax (emax);  /* 1 is not representable. */
+      /* and if emax < 0, 1 - eps is not representable either. */
+      for (i = -1; i <= 1; i++)
+        RND_LOOP (rnd)
+          {
+            mpfr_set_si_2exp (x, i, -512 * ABS (i), GMP_RNDN);
+            mpfr_clear_flags ();
+            inex = mpfr_sech (x, x, (mp_rnd_t) rnd);
+            if ((i == 0 || emax < 0 || rnd == GMP_RNDN || rnd == GMP_RNDU) &&
+                ! mpfr_overflow_p ())
+              {
+                printf ("Error in overflowed_sech0 (i = %d, rnd = %s):\n"
+                        "  The overflow flag is not set.\n",
+                        i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                err = 1;
+              }
+            if (rnd == GMP_RNDZ || rnd == GMP_RNDD)
+              {
+                if (inex >= 0)
+                  {
+                    printf ("Error in overflowed_sech0 (i = %d, rnd = %s):\n"
+                            "  The inexact value must be negative.\n",
+                            i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    err = 1;
+                  }
+                if (! mpfr_equal_p (x, y))
+                  {
+                    printf ("Error in overflowed_sech0 (i = %d, rnd = %s):\n"
+                            "  Got ", i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    mpfr_print_binary (x);
+                    printf (" instead of 0.11111111E%d.\n", emax);
+                    err = 1;
+                  }
+              }
+            else
+              {
+                if (inex <= 0)
+                  {
+                    printf ("Error in overflowed_sech0 (i = %d, rnd = %s):\n"
+                            "  The inexact value must be positive.\n",
+                            i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    err = 1;
+                  }
+                if (! (mpfr_inf_p (x) && MPFR_SIGN (x) > 0))
+                  {
+                    printf ("Error in overflowed_sech0 (i = %d, rnd = %s):\n"
+                            "  Got ", i, mpfr_print_rnd_mode ((mp_rnd_t) rnd));
+                    mpfr_print_binary (x);
+                    printf (" instead of +Inf.\n");
+                    err = 1;
+                  }
+              }
+          }
+      set_emax (old_emax);
+    }
+
+  if (err)
+    exit (1);
+  mpfr_clear (x);
+  mpfr_clear (y);
+}
+
+int
+main (int argc, char *argv[])
+{
+  tests_start_mpfr ();
+
+  check_specials ();
+  test_generic (2, 200, 10);
+  overflowed_sech0 ();
+
+  tests_end_mpfr ();
+  return 0;
+}