BIT_MASK_RXGCK_CCK_FIFOTHR
(((x) & BIT_MASK_RXGCK_CCK_FIFOTHR) << BIT_SHIFT_RXGCK_CCK_FIFOTHR)
(BIT_MASK_RXGCK_CCK_FIFOTHR << BIT_SHIFT_RXGCK_CCK_FIFOTHR)