1 /* Test mpz_set_f. 2 3 Copyright 2001 Free Software Foundation, Inc. 4 5 This file is part of the GNU MP Library test suite. 6 7 The GNU MP Library test suite is free software; you can redistribute it 8 and/or modify it under the terms of the GNU General Public License as 9 published by the Free Software Foundation; either version 3 of the License, 10 or (at your option) any later version. 11 12 The GNU MP Library test suite is distributed in the hope that it will be 13 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 15 Public License for more details. 16 17 You should have received a copy of the GNU General Public License along with 18 the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include "gmp.h" 23 #include "gmp-impl.h" 24 #include "tests.h" 25 26 27 void 28 check_one (mpz_srcptr z) 29 { 30 static const int shift[] = { 31 0, 1, GMP_LIMB_BITS, 2*GMP_LIMB_BITS, 5*GMP_LIMB_BITS 32 }; 33 34 int sh, shneg, neg; 35 mpf_t f; 36 mpz_t got, want; 37 38 mpf_init2 (f, mpz_sizeinbase(z,2)); 39 mpz_init (got); 40 mpz_init (want); 41 42 for (sh = 0; sh < numberof(shift); sh++) 43 { 44 for (shneg = 0; shneg <= 1; shneg++) 45 { 46 for (neg = 0; neg <= 1; neg++) 47 { 48 mpf_set_z (f, z); 49 mpz_set (want, z); 50 51 if (neg) 52 { 53 mpf_neg (f, f); 54 mpz_neg (want, want); 55 } 56 57 if (shneg) 58 { 59 mpz_tdiv_q_2exp (want, want, shift[sh]); 60 mpf_div_2exp (f, f, shift[sh]); 61 } 62 else 63 { 64 mpz_mul_2exp (want, want, shift[sh]); 65 mpf_mul_2exp (f, f, shift[sh]); 66 } 67 68 mpz_set_f (got, f); 69 MPZ_CHECK_FORMAT (got); 70 71 if (mpz_cmp (got, want) != 0) 72 { 73 printf ("wrong result\n"); 74 printf (" shift %d\n", shneg ? -shift[sh] : shift[sh]); 75 printf (" neg %d\n", neg); 76 mpf_trace (" f", f); 77 mpz_trace (" got", got); 78 mpz_trace (" want", want); 79 abort (); 80 } 81 } 82 } 83 } 84 85 mpf_clear (f); 86 mpz_clear (got); 87 mpz_clear (want); 88 } 89 90 91 void 92 check_various (void) 93 { 94 mpz_t z; 95 96 mpz_init (z); 97 98 mpz_set_ui (z, 0L); 99 check_one (z); 100 101 mpz_set_si (z, 123L); 102 check_one (z); 103 104 mpz_rrandomb (z, RANDS, 2*GMP_LIMB_BITS); 105 check_one (z); 106 107 mpz_rrandomb (z, RANDS, 5*GMP_LIMB_BITS); 108 check_one (z); 109 110 mpz_clear (z); 111 } 112 113 114 int 115 main (int argc, char *argv[]) 116 { 117 #if GMP_NAIL_BITS == 0 118 tests_start (); 119 mp_trace_base = 16; 120 121 check_various (); 122 123 tests_end (); 124 #endif 125 exit (0); 126 } 127