1/* Test file for mpfr_log2. 2 3Copyright 2001, 2002, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. 4Contributed by the AriC and Caramel 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_log2 29#define TEST_RANDOM_POS 8 30#include "tgeneric.c" 31 32static void 33special (void) 34{ 35 mpfr_t x; 36 int inex; 37 38 mpfr_init (x); 39 40 mpfr_set_nan (x); 41 inex = mpfr_log2 (x, x, MPFR_RNDN); 42 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 43 44 mpfr_set_inf (x, -1); 45 inex = mpfr_log2 (x, x, MPFR_RNDN); 46 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 47 48 mpfr_set_inf (x, 1); 49 inex = mpfr_log2 (x, x, MPFR_RNDN); 50 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0); 51 52 mpfr_set_ui (x, 0, MPFR_RNDN); 53 inex = mpfr_log2 (x, x, MPFR_RNDN); 54 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); 55 mpfr_set_ui (x, 0, MPFR_RNDN); 56 mpfr_neg (x, x, MPFR_RNDN); 57 inex = mpfr_log2 (x, x, MPFR_RNDN); 58 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); 59 60 mpfr_set_si (x, -1, MPFR_RNDN); 61 inex = mpfr_log2 (x, x, MPFR_RNDN); 62 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 63 64 mpfr_set_si (x, 1, MPFR_RNDN); 65 inex = mpfr_log2 (x, x, MPFR_RNDN); 66 MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x) && inex == 0); 67 68 mpfr_clear (x); 69} 70 71int 72main (int argc, char *argv[]) 73{ 74 tests_start_mpfr (); 75 76 special (); 77 78 test_generic (2, 100, 30); 79 80 data_check ("data/log2", mpfr_log2, "mpfr_log2"); 81 82 tests_end_mpfr (); 83 return 0; 84} 85