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16bits
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...