SELF_ID_ZERO_POWER_CLASS_MASK
return (quadlet & SELF_ID_ZERO_POWER_CLASS_MASK) >> SELF_ID_ZERO_POWER_CLASS_SHIFT;
*quadlet &= ~SELF_ID_ZERO_POWER_CLASS_MASK;
*quadlet |= (power_class << SELF_ID_ZERO_POWER_CLASS_SHIFT) & SELF_ID_ZERO_POWER_CLASS_MASK;
((((const u32 *)quads)[0] & SELF_ID_ZERO_POWER_CLASS_MASK) >> SELF_ID_ZERO_POWER_CLASS_SHIFT)