if (inOp_d_trunc==0) `drain_in1
else if (inOp_d_trunc==1) `drain_in2
else if (inOp_d_trunc==9 && both_negative) begin `drain_in1 `drain_in2 end
if (inOp_d_trunc==0) `drain_in1
else if (inOp_d_trunc==1) `drain_in2
else if (inOp_d_trunc==9 && both_negative) begin `drain_in1 `drain_in2 end