SELF_ID_ZERO_CONTENDER_MASK
return (quadlet & SELF_ID_ZERO_CONTENDER_MASK) >> SELF_ID_ZERO_CONTENDER_SHIFT;
*quadlet &= ~SELF_ID_ZERO_CONTENDER_MASK;
*quadlet |= (is_contender << SELF_ID_ZERO_CONTENDER_SHIFT) & SELF_ID_ZERO_CONTENDER_MASK;
((((const u32 *)quads)[0] & SELF_ID_ZERO_CONTENDER_MASK) >> SELF_ID_ZERO_CONTENDER_SHIFT)