--- /dev/null
+/* tj1 -- test file for the Bessel function of first kind (order 1)
+
+Copyright 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_j1
+#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 8)
+#define REDUCE_EMAX 262143 /* otherwise arg. reduction is too expensive */
+#include "tgeneric.c"
+
+int
+main (int argc, char *argv[])
+{
+ mpfr_t x, y;
+
+ tests_start_mpfr ();
+
+ mpfr_init (x);
+ mpfr_init (y);
+
+ /* special values */
+ mpfr_set_nan (x);
+ mpfr_j1 (y, x, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_nan_p (y));
+
+ mpfr_set_inf (x, 1); /* +Inf */
+ mpfr_j1 (y, x, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y));
+
+ mpfr_set_inf (x, -1); /* -Inf */
+ mpfr_j1 (y, x, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y));
+
+ mpfr_set_ui (x, 0, GMP_RNDN); /* +0 */
+ mpfr_j1 (y, x, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y)); /* j1(+0)=+0 */
+
+ mpfr_set_ui (x, 0, GMP_RNDN);
+ mpfr_neg (x, x, GMP_RNDN); /* -0 */
+ mpfr_j1 (y, x, GMP_RNDN);
+ MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_NEG (y)); /* j1(-0)=-0 */
+
+ mpfr_set_prec (x, 53);
+ mpfr_set_prec (y, 53);
+
+ mpfr_set_ui (x, 1, GMP_RNDN);
+ mpfr_j1 (y, x, GMP_RNDN);
+ mpfr_set_str_binary (x, "0.0111000010100111001001111011101001011100001100011011");
+ if (mpfr_cmp (x, y))
+ {
+ printf ("Error in mpfr_j1 for x=1, rnd=GMP_RNDN\n");
+ printf ("Expected "); mpfr_dump (x);
+ printf ("Got "); mpfr_dump (y);
+ exit (1);
+ }
+ mpfr_clear (x);
+ mpfr_clear (y);
+
+ test_generic (2, 100, 10);
+
+ data_check ("data/j1", mpfr_j1, "mpfr_j1");
+
+ tests_end_mpfr ();
+
+ return 0;
+}