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labri
2011 Jun 23
0
[LLVMdev] Instr Description Problem of MCore Backend
Hello
> Finally, I don't know how to describe following instructions in
> MCoreInstrInfo.td, because of its variable ins/outs. Or what other files
> should I use to finish this description?
Do you need the isel support for them? If yes, then you should custom
isel them. iirc ARM and SystemZ backends have similar instructions,
while only the first one supports full isel for them. In
2011 Jun 23
2
[LLVMdev] Instr Description Problem of MCore Backend
Hi, all:
Now I'm working on writing a backend for Moto MCore, but I don't know how to
describe some instructions.
First, I've already written MCoreRegisterInfo.td like these:
class MCoreReg<bits<4> num, string name> : Register<name> {
let Namespace = "MCore";
field bits<4> Num = num;
}
def R0 : MCoreReg< 0, "R0">,