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author | Mitya Selivanov <automainint@guattari.tech> | 2024-11-17 05:24:04 +0100 |
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committer | Mitya Selivanov <automainint@guattari.tech> | 2024-11-17 05:24:04 +0100 |
commit | d5a727a062e4d727491f4e7f047269d60a93a8cf (patch) | |
tree | 565aec155ab056f1bef8ddc7dc78d52e65aa76b7 /kit/mersenne_twister_64.c | |
parent | 4ba961dcbf60f7c12f53f46baa261757e15d5931 (diff) | |
download | saw-d5a727a062e4d727491f4e7f047269d60a93a8cf.zip |
Remove lots of dependencies
Diffstat (limited to 'kit/mersenne_twister_64.c')
-rw-r--r-- | kit/mersenne_twister_64.c | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/kit/mersenne_twister_64.c b/kit/mersenne_twister_64.c deleted file mode 100644 index 4032dc9..0000000 --- a/kit/mersenne_twister_64.c +++ /dev/null @@ -1,66 +0,0 @@ -#include "mersenne_twister_64.h" - -#define MM 156 -#define MATRIX_A 0xb5026f5aa96619e9ull -#define UM 0xffffffff80000000ull -#define LM 0x7fffffffull - -void kit_mt64_init_array(kit_mt64_state_t *state, i64 size, - u64 *seed) { - i64 i; - for (i = 0; i < size && i < KIT_MT64_N; i++) state->mt[i] = seed[i]; - for (state->index = size; state->index < KIT_MT64_N; state->index++) - state->mt[state->index] = (6364136223846793005ull * - (state->mt[state->index - 1] ^ - (state->mt[state->index - 1] >> - 62u)) + - state->index); -} - -void kit_mt64_init(kit_mt64_state_t *state, u64 seed) { - kit_mt64_init_array(state, 1, &seed); -} - -void kit_mt64_rotate(kit_mt64_state_t *state) { - static u64 mag01[2] = { 0ull, MATRIX_A }; - - u64 x; - i32 i; - - for (i = 0; i < KIT_MT64_N - MM; i++) { - x = (state->mt[i] & UM) | (state->mt[i + 1] & LM); - state->mt[i] = state->mt[i + MM] ^ (x >> 1u) ^ - mag01[(i32) (x & 1ull)]; - } - - for (; i < KIT_MT64_N - 1; i++) { - x = (state->mt[i] & UM) | (state->mt[i + 1] & LM); - state->mt[i] = state->mt[i + (MM - KIT_MT64_N)] ^ (x >> 1u) ^ - mag01[(i32) (x & 1ull)]; - } - - x = (state->mt[KIT_MT64_N - 1] & UM) | (state->mt[0] & LM); - state->mt[KIT_MT64_N - 1] = state->mt[MM - 1] ^ (x >> 1u) ^ - mag01[(i32) (x & 1ull)]; - - state->index = 0; -} - -u64 kit_mt64_generate(kit_mt64_state_t *state) { - if (state->index >= KIT_MT64_N) - kit_mt64_rotate(state); - - u64 x = state->mt[state->index++]; - - x ^= (x >> 29u) & 0x5555555555555555ull; - x ^= (x << 17u) & 0x71d67fffeda60000ull; - x ^= (x << 37u) & 0xfff7eee000000000ull; - x ^= (x >> 43u); - - return x; -} - -#undef MM -#undef MATRIX_A -#undef UM -#undef LM |