--- /dev/null
+/* Test file for mpfr_cosh.
+
+Copyright 2001, 2002, 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"
+
+#define TEST_FUNCTION mpfr_cosh
+#define TEST_RANDOM_EMIN -36
+#define TEST_RANDOM_EMAX 36
+#include "tgeneric.c"
+
+static void
+special (void)
+{
+ mpfr_t x, y;
+ int i;
+
+ mpfr_init (x);
+ mpfr_init (y);
+
+ mpfr_set_nan (x);
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (!mpfr_nan_p (y))
+ {
+ printf ("Error: cosh(NaN) != NaN\n");
+ exit (1);
+ }
+
+ mpfr_set_inf (x, 1);
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (!mpfr_inf_p (y) || mpfr_sgn (y) < 0)
+ {
+ printf ("Error: cosh(+Inf) != +Inf\n");
+ exit (1);
+ }
+
+ mpfr_set_inf (x, -1);
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (!mpfr_inf_p (y) || mpfr_sgn (y) < 0)
+ {
+ printf ("Error: cosh(-Inf) != +Inf\n");
+ exit (1);
+ }
+
+ /* cosh(+/-0) = 1 */
+ mpfr_set_ui (x, 0, GMP_RNDN);
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (mpfr_cmp_ui (y, 1))
+ {
+ printf ("Error: cosh(+0) != 1\n");
+ exit (1);
+ }
+ mpfr_neg (x, x, GMP_RNDN);
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (mpfr_cmp_ui (y, 1))
+ {
+ printf ("Error: cosh(-0) != 1\n");
+ exit (1);
+ }
+
+ mpfr_set_prec (x, 32);
+ mpfr_set_prec (y, 32);
+
+ mpfr_set_str_binary (x, "0.1101110111111111001011101000101");
+ mpfr_set_str_binary (y, "1.0110011001110000101100011001001");
+ mpfr_cosh (x, x, GMP_RNDN);
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error: mpfr_cosh for prec=32 (1)\n");
+ exit (1);
+ }
+
+ mpfr_set_str_binary (x, "-0.1110111000011101010111100000101E-1");
+ mpfr_set_str_binary (y, "1.0001110000101111111111100110101");
+ mpfr_cosh (x, x, GMP_RNDN);
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error: mpfr_cosh for prec=32 (2)\n");
+ exit (1);
+ }
+
+ mpfr_set_prec (x, 2);
+ mpfr_clear_flags ();
+ mpfr_set_str_binary (x, "1E1000000000");
+ i = mpfr_cosh (x, x, GMP_RNDN);
+ MPFR_ASSERTN (MPFR_IS_INF (x) && MPFR_SIGN (x) > 0);
+ MPFR_ASSERTN (mpfr_overflow_p ());
+ MPFR_ASSERTN (i == 1);
+
+ mpfr_clear_flags ();
+ mpfr_set_str_binary (x, "-1E1000000000");
+ i = mpfr_cosh (x, x, GMP_RNDN);
+ MPFR_ASSERTN (MPFR_IS_INF (x) && MPFR_SIGN (x) > 0);
+ MPFR_ASSERTN (mpfr_overflow_p () && !mpfr_underflow_p ());
+ MPFR_ASSERTN (i == 1);
+
+ mpfr_clear_flags ();
+ mpfr_set_str_binary (x, "-1E1000000000");
+ i = mpfr_cosh (x, x, GMP_RNDD);
+ MPFR_ASSERTN (!MPFR_IS_INF (x) && MPFR_SIGN (x) > 0);
+ MPFR_ASSERTN (mpfr_overflow_p () && !mpfr_underflow_p ());
+ MPFR_ASSERTN (i == -1);
+
+ mpfr_clear_flags ();
+ mpfr_set_str_binary (x, "-1E1000000000");
+ i = mpfr_cosh (x, x, GMP_RNDU);
+ MPFR_ASSERTN (MPFR_IS_INF (x) && MPFR_SIGN (x) > 0);
+ MPFR_ASSERTN (mpfr_overflow_p () && !mpfr_underflow_p ());
+ MPFR_ASSERTN (i == 1);
+
+ mpfr_clear (x);
+ mpfr_clear (y);
+}
+
+static void
+special_overflow (void)
+{
+ /* Check for overflow in 3 cases:
+ 1. cosh(x) is representable, but not exp(x)
+ 2. cosh(x) is not representable in the selected range of exp.
+ 3. cosh(x) exp overflow even with the largest range of exp */
+ mpfr_t x, y;
+ mp_exp_t emin, emax;
+
+ emin = mpfr_get_emin ();
+ emax = mpfr_get_emax ();
+
+ set_emin (-125);
+ set_emax (128);
+
+ mpfr_init2 (x, 24);
+ mpfr_init2 (y, 24);
+
+ mpfr_set_str_binary (x, "0.101100100000000000110100E7");
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (mpfr_cmp_str (y, "0.101010001111001010001110E128", 2, GMP_RNDN))
+ {
+ printf("Special overflow error 1.\n");
+ mpfr_dump (y);
+ exit (1);
+ }
+
+ mpfr_set_str_binary (x, "0.101100100000000000110100E8");
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (!mpfr_inf_p(y))
+ {
+ printf("Special overflow error 2.\n");
+ mpfr_dump (y);
+ exit (1);
+ }
+
+ set_emin (emin);
+ set_emax (emax);
+
+ mpfr_set_str_binary (x, "0.101100100000000000110100E1000000");
+ mpfr_cosh (y, x, GMP_RNDN);
+ if (!mpfr_inf_p(y))
+ {
+ printf("Special overflow error 3.\n");
+ mpfr_dump (y);
+ exit (1);
+ }
+
+ mpfr_clear (y);
+ mpfr_clear (x);
+}
+
+int
+main (int argc, char *argv[])
+{
+ tests_start_mpfr ();
+
+ special_overflow ();
+ special ();
+
+ test_generic (2, 100, 100);
+
+ data_check ("data/cosh", mpfr_cosh, "mpfr_cosh");
+ bad_cases (mpfr_cosh, mpfr_acosh, "mpfr_cosh", 0, 1, 255, 4, 128, 800, 100);
+
+ tests_end_mpfr ();
+ return 0;
+}
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