1/* Test file for mpfr_copysign, mpfr_setsign and mpfr_signbit. 2 3Copyright 2004, 2006, 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 28static void 29copysign_variant (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, 30 mpfr_rnd_t rnd_mode, int k) 31{ 32 mpfr_clear_flags (); 33 switch (k) 34 { 35 case 0: 36 mpfr_copysign (z, x, y, MPFR_RNDN); 37 return; 38 case 1: 39 (mpfr_copysign) (z, x, y, MPFR_RNDN); 40 return; 41 case 2: 42 mpfr_setsign (z, x, mpfr_signbit (y), MPFR_RNDN); 43 return; 44 case 3: 45 mpfr_setsign (z, x, (mpfr_signbit) (y), MPFR_RNDN); 46 return; 47 case 4: 48 (mpfr_setsign) (z, x, mpfr_signbit (y), MPFR_RNDN); 49 return; 50 case 5: 51 (mpfr_setsign) (z, x, (mpfr_signbit) (y), MPFR_RNDN); 52 return; 53 } 54} 55 56int 57main (void) 58{ 59 mpfr_t x, y, z; 60 int i, j, k; 61 62 tests_start_mpfr (); 63 64 mpfr_init (x); 65 mpfr_init (y); 66 mpfr_init (z); 67 68 for (i = 0; i <= 1; i++) 69 for (j = 0; j <= 1; j++) 70 for (k = 0; k <= 5; k++) 71 { 72 mpfr_set_nan (x); 73 i ? MPFR_SET_NEG (x) : MPFR_SET_POS (x); 74 mpfr_set_nan (y); 75 j ? MPFR_SET_NEG (y) : MPFR_SET_POS (y); 76 copysign_variant (z, x, y, MPFR_RNDN, k); 77 if (MPFR_SIGN (z) != MPFR_SIGN (y) || !mpfr_nanflag_p ()) 78 { 79 printf ("Error in mpfr_copysign (%cNaN, %cNaN)\n", 80 i ? '-' : '+', j ? '-' : '+'); 81 exit (1); 82 } 83 84 mpfr_set_si (x, i ? -1250 : 1250, MPFR_RNDN); 85 mpfr_set_nan (y); 86 j ? MPFR_SET_NEG (y) : MPFR_SET_POS (y); 87 copysign_variant (z, x, y, MPFR_RNDN, k); 88 if (i != j) 89 mpfr_neg (x, x, MPFR_RNDN); 90 if (! mpfr_equal_p (z, x) || mpfr_nanflag_p ()) 91 { 92 printf ("Error in mpfr_copysign (%c1250, %cNaN)\n", 93 i ? '-' : '+', j ? '-' : '+'); 94 exit (1); 95 } 96 97 mpfr_set_si (x, i ? -1250 : 1250, MPFR_RNDN); 98 mpfr_set_si (y, j ? -1717 : 1717, MPFR_RNDN); 99 copysign_variant (z, x, y, MPFR_RNDN, k); 100 if (i != j) 101 mpfr_neg (x, x, MPFR_RNDN); 102 if (! mpfr_equal_p (z, x) || mpfr_nanflag_p ()) 103 { 104 printf ("Error in mpfr_copysign (%c1250, %c1717)\n", 105 i ? '-' : '+', j ? '-' : '+'); 106 exit (1); 107 } 108 } 109 110 mpfr_clear (x); 111 mpfr_clear (y); 112 mpfr_clear (z); 113 114 tests_end_mpfr (); 115 return 0; 116} 117