| Austin Schuh | dace2a6 | 2020-08-18 10:56:48 -0700 | [diff] [blame] | 1 | /* |
| 2 | |
| 3 | Copyright 2012, 2014, 2016, 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 <assert.h> |
| 21 | #include <limits.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <stdio.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | #include "testutils.h" |
| 27 | |
| 28 | #define MAXBITS 400 |
| 29 | #define COUNT 100 |
| 30 | |
| 31 | void |
| 32 | my_mpz_mul (mpz_t r, mpz_srcptr a, mpz_srcptr b) |
| 33 | { |
| 34 | mp_limb_t *tp; |
| 35 | mp_size_t tn, an, bn; |
| 36 | |
| 37 | an = mpz_size (a); |
| 38 | bn = mpz_size (b); |
| 39 | |
| 40 | assert (an > 0); |
| 41 | assert (bn > 0); |
| 42 | |
| 43 | tn = an + bn; |
| 44 | tp = mpz_limbs_write (r, tn); |
| 45 | if (an > bn) |
| 46 | mpn_mul (tp, mpz_limbs_read (a), an, mpz_limbs_read (b), bn); |
| 47 | else |
| 48 | mpn_mul (tp, mpz_limbs_read (b), bn, mpz_limbs_read (a), an); |
| 49 | |
| 50 | if (mpz_sgn (a) != mpz_sgn(b)) |
| 51 | tn = - tn; |
| 52 | |
| 53 | mpz_limbs_finish (r, tn); |
| 54 | } |
| 55 | |
| 56 | void |
| 57 | testmain (int argc, char **argv) |
| 58 | { |
| 59 | unsigned i; |
| 60 | mpz_t a, b, res, ref; |
| 61 | |
| 62 | mpz_init (a); |
| 63 | mpz_init (b); |
| 64 | mpz_init (res); |
| 65 | mpz_init (ref); |
| 66 | |
| 67 | for (i = 0; i < COUNT; i++) |
| 68 | { |
| 69 | mini_random_op3 (OP_MUL, MAXBITS, a, b, ref); |
| 70 | if (mpz_sgn(ref) == 0) |
| 71 | /* my_mpz_mul requires a != 0, b != 0 */ |
| 72 | continue; |
| 73 | my_mpz_mul (res, a, b); |
| 74 | if (mpz_cmp (res, ref)) |
| 75 | { |
| 76 | fprintf (stderr, "my_mpz_mul failed:\n"); |
| 77 | dump ("a", a); |
| 78 | dump ("b", b); |
| 79 | dump ("r", res); |
| 80 | dump ("ref", ref); |
| 81 | abort (); |
| 82 | } |
| 83 | /* The following test exploits a side-effect of my_mpz_mul: res |
| 84 | points to a buffer with at least an+bn limbs, and the limbs |
| 85 | above the result are zeroed. */ |
| 86 | if (mpz_size (b) > 0 && mpz_getlimbn (res, mpz_size(a)) != mpz_limbs_read (res) [mpz_size(a)]) |
| 87 | { |
| 88 | fprintf (stderr, "getlimbn - limbs_read differ.\n"); |
| 89 | abort (); |
| 90 | } |
| 91 | if ((i % 4 == 0) && mpz_size (res) > 1) |
| 92 | { |
| 93 | mpz_realloc2 (res, 1); |
| 94 | if (mpz_cmp_ui (res, 0)) |
| 95 | { |
| 96 | fprintf (stderr, "mpz_realloc2 did not clear res.\n"); |
| 97 | abort (); |
| 98 | } |
| 99 | mpz_limbs_finish (ref, 0); |
| 100 | if (mpz_cmp_d (ref, 0)) |
| 101 | { |
| 102 | fprintf (stderr, "mpz_limbs_finish did not clear res.\n"); |
| 103 | abort (); |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | mpz_clear (a); |
| 108 | mpz_clear (b); |
| 109 | mpz_clear (res); |
| 110 | mpz_clear (ref); |
| 111 | } |