Function rotl

3rd/lua-5.4.3/src/lmathlib.c:304–306

rotate left 'x' by 'n' bits */

/* rotate left 'x' by 'n' bits */
static Rand64 rotl (Rand64 x, int n) {
  return (x << n) | (trim64(x) >> (64 - n));
}

static Rand64 nextrand (Rand64 *state) {
  Rand64 state0 = state[0];