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Altera_Forum
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14 years ago

Using custom instruction from uCLinux user app on nios2mmu

Hello, Is it possible to use a custom instruction from an user application running on NIOS2MMU - uCLinux. I'm trying to run the CRC design example on uCLinux. When I try to compile the ...
Altera_Forum's avatar
Altera_Forum
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14 years ago

The 'Fetch' cycle reads the opcode word from memory, the register values must be read in the following cycle - the 'Decode' cycle - in order to be available during 'Execute'.

This read will be unconditional, the only question is the actual condition(s) for a 'D' phase stall (ie a re-execute for the same opcode word).