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Altera_Forum
Honored Contributor
Honored ContributorNew IP development
Hello, I am interested in developing some instructions which can do the bignum operations (like adding two operands of 1024 bit) and hence by plan to implement a simple Full Adder like this: ...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- Please correct me if I miss something here. --- Quote End --- There is no technical reason why you can't use a secondary Avalon-MM Slave port for the control activity, and that may very well be a better starting point for you, since you only have to learn one interface (Avalon-MM, but two different directions). The main reason (I see) for using custom instructions is the higher performance you should be able to achieve. (as dsl noted in post# 8 of this thread, NIOS IORD_ and IOWR_ macros [and the underlying hardware interactions] are relatively slow). In the end, for this component the control aspect is a relatively small portion of where your development time is going to be spent, so it is definitely something you can easily revisit later for performance or other reasons.
