1 /* Test file for mpfr_sqr. 2 3 Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4 Contributed by the Arenaire and Cacao projects, INRIA. 5 6 This file is part of the GNU MPFR Library. 7 8 The GNU MPFR Library is free software; you can redistribute it and/or modify 9 it under the terms of the GNU Lesser General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or (at your 11 option) any later version. 12 13 The GNU MPFR Library is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16 License for more details. 17 18 You should have received a copy of the GNU Lesser General Public License 19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 21 51 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_sqr 29 #include "tgeneric.c" 30 31 static int 32 inexact_sign (int x) 33 { 34 return (x < 0) ? -1 : (x > 0); 35 } 36 37 static void 38 error1 (mpfr_rnd_t rnd, mpfr_prec_t prec, 39 mpfr_t in, mpfr_t outmul, mpfr_t outsqr) 40 { 41 printf("ERROR: for %s and prec=%lu\nINPUT=", mpfr_print_rnd_mode(rnd), prec); 42 mpfr_dump(in); 43 printf("OutputMul="); mpfr_dump(outmul); 44 printf("OutputSqr="); mpfr_dump(outsqr); 45 exit(1); 46 } 47 48 static void 49 error2 (mpfr_rnd_t rnd, mpfr_prec_t prec, mpfr_t in, mpfr_t out, 50 int inexactmul, int inexactsqr) 51 { 52 printf("ERROR: for %s and prec=%lu\nINPUT=", mpfr_print_rnd_mode(rnd), prec); 53 mpfr_dump(in); 54 printf("Output="); mpfr_dump(out); 55 printf("InexactMul= %d InexactSqr= %d\n", inexactmul, inexactsqr); 56 exit(1); 57 } 58 59 static void 60 check_random (mpfr_prec_t p) 61 { 62 mpfr_t x,y,z; 63 int r; 64 int i, inexact1, inexact2; 65 66 mpfr_inits2 (p, x, y, z, (mpfr_ptr) 0); 67 for(i = 0 ; i < 500 ; i++) 68 { 69 mpfr_urandomb (x, RANDS); 70 if (MPFR_IS_PURE_FP(x)) 71 for (r = 0 ; r < MPFR_RND_MAX ; r++) 72 { 73 inexact1 = mpfr_mul (y, x, x, (mpfr_rnd_t) r); 74 inexact2 = mpfr_sqr (z, x, (mpfr_rnd_t) r); 75 if (mpfr_cmp (y, z)) 76 error1 ((mpfr_rnd_t) r,p,x,y,z); 77 if (inexact_sign (inexact1) != inexact_sign (inexact2)) 78 error2 ((mpfr_rnd_t) r,p,x,y,inexact1,inexact2); 79 } 80 } 81 mpfr_clears (x, y, z, (mpfr_ptr) 0); 82 } 83 84 static void 85 check_special (void) 86 { 87 mpfr_t x, y; 88 mpfr_exp_t emin; 89 90 mpfr_init (x); 91 mpfr_init (y); 92 93 mpfr_set_nan (x); 94 mpfr_sqr (y, x, MPFR_RNDN); 95 MPFR_ASSERTN (mpfr_nan_p (y)); 96 97 mpfr_set_inf (x, 1); 98 mpfr_sqr (y, x, MPFR_RNDN); 99 MPFR_ASSERTN (mpfr_inf_p (y) && mpfr_sgn (y) > 0); 100 101 mpfr_set_inf (x, -1); 102 mpfr_sqr (y, x, MPFR_RNDN); 103 MPFR_ASSERTN (mpfr_inf_p (y) && mpfr_sgn (y) > 0); 104 105 mpfr_set_ui (x, 0, MPFR_RNDN); 106 mpfr_sqr (y, x, MPFR_RNDN); 107 MPFR_ASSERTN (mpfr_zero_p (y)); 108 109 emin = mpfr_get_emin (); 110 mpfr_set_emin (0); 111 mpfr_set_ui (x, 1, MPFR_RNDN); 112 mpfr_div_2ui (x, x, 1, MPFR_RNDN); 113 MPFR_ASSERTN (!mpfr_zero_p (x)); 114 mpfr_sqr (y, x, MPFR_RNDN); 115 MPFR_ASSERTN (mpfr_zero_p (y)); 116 mpfr_set_emin (emin); 117 118 mpfr_clear (y); 119 mpfr_clear (x); 120 } 121 122 int 123 main (void) 124 { 125 mpfr_prec_t p; 126 127 tests_start_mpfr (); 128 129 check_special (); 130 for (p = 2; p < 200; p++) 131 check_random (p); 132 133 test_generic (2, 200, 15); 134 data_check ("data/sqr", mpfr_sqr, "mpfr_sqr"); 135 bad_cases (mpfr_sqr, mpfr_sqrt, "mpfr_sqr", 8, -256, 255, 4, 128, 800, 50); 136 137 tests_end_mpfr (); 138 return 0; 139 } 140