New IP development

Hello Ted,

I think when I gave a thought now, I understood what you are trying to say. The NIOS II just gives a control signal to the IP to say which operand to use (like a ADD, SUB etc).

Based on that, the logic to do the corresponding operations can be built in the IP core itself. So the macros like BIGNUM_ADD(&dst, &srcA, &srcB); will be just used to specify the addresses for the IP cores and the corresponding custom instruction essentially does nothing. It just passes those addresses to the IP core and the IP core does the processing (the corresponding operation inside the IP core can be selected with the help of a control signal from the custom instruction, like 'n').

After the processing of data, the IP core can write values to the &dst which is already provided by the custom instruction.

Is this what you were telling or am I going too much? If this is not what you were explaining, please see my above post.

Thank You,

Akhil