Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

custom instruction not working in 13.1.3

I have a simple combinatorial custom instruction that works fine under quartos 9.1. However (qsys in) quartos 13.1.3 doesn't generate the right logic. I've not tried quartos 14.x because I'm usi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

I don't think adding datab makes any difference.

Using 'b' also generates a lot less logic than having multiple instructions.

Last time I was 'playing around' with custom instructions I also used 'readrb' to mux between 'b' and 'datab'.