WORD_MASK
word_t mask = (word_t)((exp_cnt == 0) ? WORD_MASK : (word_t)((WORD(1) << exp_cnt) - WORD(1)));
set_tcb_field(sc, f->tid, W_TCB_SND_UNA_RAW, WORD_MASK,
W_TCB_SND_UNA_RAW + 1, WORD_MASK,
W_TCB_SND_UNA_RAW + 2, WORD_MASK,
W_TCB_SND_UNA_RAW + 3, WORD_MASK,
W_TCB_RX_FRAG3_LEN_RAW, WORD_MASK,
W_TCB_RX_FRAG2_PTR_RAW, WORD_MASK,
W_TCB_RX_FRAG2_PTR_RAW + 1, WORD_MASK,
W_TCB_RX_FRAG2_PTR_RAW + 2, WORD_MASK,
W_TCB_RX_FRAG2_PTR_RAW + 3, WORD_MASK,
W_TCB_RX_FRAG3_START_IDX_OFFSET_RAW, WORD_MASK,
set_tcb_field(sc, f->tid, W_TCB_PDU_HDR_LEN, WORD_MASK,