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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 ContributorA (non-combinatorial) custom instruction can read/write internal fpga memory just the same as any other logic.
What you could do is dual port some internal memory to the custom instruction logic and a tightly coupled data port. You custom instruction would then take memory addresses as it's inputs and perform the operation on the shared memory block. The cpu reads/writes of the memory would be as fast any other way of getting the data into your logic.
