RING_OP1_IBI_DEQ_PTR
op1_val &= ~RING_OP1_IBI_DEQ_PTR;
op1_val |= FIELD_PREP(RING_OP1_IBI_DEQ_PTR, deq_ptr);
deq_ptr = FIELD_GET(RING_OP1_IBI_DEQ_PTR, op1_val);