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Honored Contributor
Honored ContributorNios2 Custom Instruction
Hello everybody; I made my custom logic that accepts 2 inputs each of 128 bits wide and produces 128 bits reault, is this any way to integrate my logic with Nios2 and deal with it by a custom ins...
Altera_ForumHonored Contributor
Honored ContributorIf the several clocks necessary is OK, then yes you can use a multi-cycle custom instruction that accesses the NIOS register file to read the two 128-bit inputs and then write the 128-bit output. See page 1-9 of http://www.altera.com/literature/ug/ug_nios2_custom_instruction.pdf
However, if you wish to achieve relatively high throughput, you would be better off putting your accelerator in a custom IP block with an Avalon-MM Slave interface for control and one or more Avalon-MM Master ports to read/write your data directly from memory.
