How to add new instructions support to gcc?

[Ming Ouyang]

Hi everyone,

I need to add new instrctions support to gcc, but I knew little things
about gcc internals, where should I start from?

Our current chips use mipsx instruction set and will support several new
instructions like ori, addhi. What should I do to make gcc use the new 
instructions? I don't have any idea about that, thanks for any idea!

Ming

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