[granularity]

Thanks for the links! Seems like we don't need to mask prior to the first compare, since the low order bits only matter if the high order bits are equal (in which case, we can also safely compare lower bits). Or am I missing something?

  bool IsEveryComponentGreaterThanOrEqual(uint16_t x, uint16_t y) {
    int rv = x >= y;
    auto xg = x & 0x07E0; auto yg = y & 0x07E0; rv &= xg >= yg;
    auto xb = x & 0x001F; auto yb = y & 0x001F; rv &= xb >= yb;
    return rv != 0;
  }