src/lj_prng.h

   1 /*
   2 ** Pseudo-random number generation.
   3 ** Copyright (C) 2005-2023 Mike Pall. See Copyright Notice in luajit.h
   4 */
   5
   6 #ifndef _LJ_PRNG_H
   7 #define _LJ_PRNG_H
   8
   9 #include "lj_def.h"
  10
  11 LJ_FUNC int LJ_FASTCALL lj_prng_seed_secure(PRNGState *rs);
  12 LJ_FUNC uint64_t LJ_FASTCALL lj_prng_u64(PRNGState *rs);
  13 LJ_FUNC uint64_t LJ_FASTCALL lj_prng_u64d(PRNGState *rs);
  14
  15 /* This is just the precomputed result of lib_math.c:random_seed(rs, 0.0). */
  16 static LJ_AINLINE void lj_prng_seed_fixed(PRNGState *rs)
  17 {
  18   rs->u[0] = U64x(a0d27757,0a345b8c);
  19   rs->u[1] = U64x(764a296c,5d4aa64f);
  20   rs->u[2] = U64x(51220704,070adeaa);
  21   rs->u[3] = U64x(2a2717b5,a7b7b927);
  22 }
  23
  24 #endif