Hi all,
According the openrisc architecture, there are two classes
instruction set, class I and class II. The class I is essential and class II
is optional. My question is if class I is implemented in the processor.
How can I avoid the gcc compiler generate the instruction sets are not
implemented in the processor? I mean what is the option for the gcc
complier to avoid generation of the class II instruction set? Thank you
very much.

Regards,

Stephen