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2007 Mar 13
0
[LLVMdev] Writing a backend basic information
...ad the writing a backend information and am currently modifying a copy of a SPARC backend to prototype.I have defined the register set OK, and am working on defining the basic instructions. I'm not sure where/how best to cope with the immediate value printing and immediate value limiting to 17bits in instruction selection/code generation. I had thought of using a multiclass definition for each instruction that has an immediate present/omitted. Would I need to define a new 17bit type Imm17 in CodeGen/ValueTypes.td/h, or can I cope with the 17 bit immediate elsewhere by perhaps using an...