2 * Test case for xoshiro256** implementation.
3 * Copyright © 2022-2023 Nick Bowler
5 * Directly compare the game RNG against the reference implementation.
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
25 #include "game-notime.h"
31 unsigned long long seed_state = 0xdeadbeeff00dcafe;
32 unsigned long long test_result, ref_result;
33 unsigned long long ref_state[4], test_state[4];
37 for (i = 0; i < 100; i++) {
38 s[0] = ref_state[0] = test_state[0] = splitmix64(&seed_state);
39 s[1] = ref_state[1] = test_state[1] = splitmix64(&seed_state);
40 s[2] = ref_state[2] = test_state[2] = splitmix64(&seed_state);
41 s[3] = ref_state[3] = test_state[3] = splitmix64(&seed_state);
44 test_result = xoshiro256ss(test_state);
46 if (ref_result != test_result) {
47 printf("not ok %d rng output\n", 2*i+1);
48 printf("# Failed, unexpected result\n");
49 printf("# with initial state %llx %llx %llx %llx\n",
50 ref_state[0], ref_state[1],
51 ref_state[2], ref_state[3]);
52 printf("# received: %llx\n", test_result);
53 printf("# expected: %llx\n", ref_result);
56 printf("ok %d rng output\n", 2*i+1);
59 if (s[0] != test_state[0] || s[1] != test_state[1]
60 || s[2] != test_state[2] || s[3] != test_state[3])
62 printf("not ok %d rng state update\n", 2*i+2);
63 printf("# Failed, state update differed\n");
64 printf("# with initial state %llx %llx %llx %llx\n",
65 ref_state[0], ref_state[1],
66 ref_state[2], ref_state[3]);
67 printf("# received: %llx %llx %llx %llx\n",
68 test_state[0], test_state[1],
69 test_state[2], test_state[3]);
70 printf("# expected: %llx %llx %llx %llx\n",
71 (unsigned long long)s[0],
72 (unsigned long long)s[1],
73 (unsigned long long)s[2],
74 (unsigned long long)s[3]);
77 printf("ok %d rng state update\n", 2*i+2);