1/* ty0 -- test file for the Bessel function of second kind (order 0) 2 3Copyright 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4Contributed by the Arenaire and Cacao projects, INRIA. 5 6This file is part of the GNU MPFR Library. 7 8The GNU MPFR Library is free software; you can redistribute it and/or modify 9it under the terms of the GNU Lesser General Public License as published by 10the Free Software Foundation; either version 3 of the License, or (at your 11option) any later version. 12 13The GNU MPFR Library is distributed in the hope that it will be useful, but 14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16License for more details. 17 18You should have received a copy of the GNU Lesser General Public License 19along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23#include <stdio.h> 24#include <stdlib.h> 25 26#include "mpfr-test.h" 27 28#define TEST_FUNCTION mpfr_y0 29#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 8, RANDS) 30#include "tgeneric.c" 31 32int 33main (int argc, char *argv[]) 34{ 35 mpfr_t x, y; 36 37 tests_start_mpfr (); 38 39 mpfr_init (x); 40 mpfr_init (y); 41 42 /* special values */ 43 mpfr_set_nan (x); 44 mpfr_y0 (y, x, MPFR_RNDN); 45 MPFR_ASSERTN(mpfr_nan_p (y)); 46 47 mpfr_set_inf (x, 1); /* +Inf */ 48 mpfr_y0 (y, x, MPFR_RNDN); 49 MPFR_ASSERTN(mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y)); 50 51 mpfr_set_inf (x, -1); /* -Inf */ 52 mpfr_y0 (y, x, MPFR_RNDN); 53 MPFR_ASSERTN(mpfr_nan_p (y)); 54 55 mpfr_set_ui (x, 0, MPFR_RNDN); /* +0 */ 56 mpfr_y0 (y, x, MPFR_RNDN); 57 MPFR_ASSERTN(mpfr_inf_p (y) && MPFR_IS_NEG (y)); /* y0(+0)=-Inf */ 58 59 mpfr_set_ui (x, 0, MPFR_RNDN); 60 mpfr_neg (x, x, MPFR_RNDN); /* -0 */ 61 mpfr_y0 (y, x, MPFR_RNDN); 62 MPFR_ASSERTN(mpfr_inf_p (y) && MPFR_IS_NEG (y)); /* y0(-0)=-Inf */ 63 64 mpfr_set_prec (x, 53); 65 mpfr_set_prec (y, 53); 66 67 mpfr_set_ui (x, 1, MPFR_RNDN); 68 mpfr_y0 (y, x, MPFR_RNDN); 69 mpfr_set_str_binary (x, "0.00010110100110000000001000100110111100110101100011011111"); 70 if (mpfr_cmp (x, y)) 71 { 72 printf ("Error in mpfr_y0 for x=1, rnd=MPFR_RNDN\n"); 73 printf ("Expected "); mpfr_dump (x); 74 printf ("Got "); mpfr_dump (y); 75 exit (1); 76 } 77 78 mpfr_set_si (x, -1, MPFR_RNDN); 79 mpfr_y0 (y, x, MPFR_RNDN); 80 if (!mpfr_nan_p (y)) 81 { 82 printf ("Error in mpfr_y0 for x=-1, rnd=MPFR_RNDN\n"); 83 printf ("Expected NaN\n"); 84 printf ("Got "); mpfr_dump (y); 85 exit (1); 86 } 87 88 mpfr_clear (x); 89 mpfr_clear (y); 90 91 test_generic (2, 100, 1); 92 93 data_check ("data/y0", mpfr_y0, "mpfr_y0"); 94 95 tests_end_mpfr (); 96 97 return 0; 98} 99