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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 complete custom instruction is "ignored" by the NIOS CPU core. Your hardware just is supplied with the rA, rB and rC information. As well the three number as the values of 2 of the appropriate registers, and it is (optionally) supposed to output the value, the NIOS implementation is supposed to write into the third register.

-Michael