Function Ishl

third-party/lua-5.5.0/src/lmathlib.c:429–432

return i << n */

/* return i << n */
static Rand64 Ishl (Rand64 i, int n) {
  lua_assert(n > 0 && n < 32);
  return packI((i.h << n) | (trim32(i.l) >> (32 - n)), i.l << n);
}

/* i1 ^= i2 */
static void Ixor (Rand64 *i1, Rand64 i2) {