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| author | Lars-Dominik Braun <lars@6xq.net> | 2015-02-09 18:04:22 +0100 |
|---|---|---|
| committer | Lars-Dominik Braun <lars@6xq.net> | 2015-05-02 21:36:44 +0200 |
| commit | e98d15d4eb88ec13a6e6ef97e915aada231855fa (patch) | |
| tree | 3e8eac4b4da2e33551e98b36995a4a9eee9f7728 /xorshift.h | |
| parent | 9cdac5c8de53244dcd19aa15d646c022a2614c24 (diff) | |
| download | pucket-e98d15d4eb88ec13a6e6ef97e915aada231855fa.tar.gz pucket-e98d15d4eb88ec13a6e6ef97e915aada231855fa.tar.bz2 pucket-e98d15d4eb88ec13a6e6ef97e915aada231855fa.zip | |
Replace isaac with xorshift
No difference in performance. rdrand instruction alone is too slow.
Diffstat (limited to 'xorshift.h')
| -rw-r--r-- | xorshift.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/xorshift.h b/xorshift.h new file mode 100644 index 0000000..64c3ea2 --- /dev/null +++ b/xorshift.h @@ -0,0 +1,14 @@ +#pragma once + +#include <stdint.h> + +#define XORSHIFT_S 16 + +typedef struct { + uint64_t s[XORSHIFT_S]; + int p; +} randctx; + +uint64_t xorshift_step (randctx * const st); +void xorshift_seed (randctx * const st); + |