1-before-macro-expansion.h

coroutine(something)
  LOOP(1) {
    play(quieter(i * (i >> 10 | i >> 3)));
    yield();
    play(i * (i >> 6 | i >> 4));
    yield();
  }
end

2-after-macro-expansion.h

int something (int reset) { static int first_state = 1, state = 1; if (reset) { state = first_state; }; switch(state) { case 1:;
  int _end = i + (1 * 8000); for (; i < _end; i++) {
    do { putchar(( ((( ((i * (i >> 10 | i >> 3)) & 0xFF) >> 2)) & 0xFF) >> 2)); i++; } while(0);
    do { state = 4; return 0; case 4:; } while (0);
    do { putchar(( ((i * (i >> 6 | i >> 4)) & 0xFF) >> 2)); i++; } while(0);
    do { state = 6; return 0; case 6:; } while (0);
  }
state = first_state; return 1; }; }