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Author SHA1 Message Date
Zi Xuan Wu
ec17c4f075 [CSKY 3/n] Add bare-bones C-SKY MCTargetDesc 
Add basis of CSKY MCTargetDesc and it's enough to compile and link but doesn't yet do anything particularly useful.
Once an ASM parser and printer are added in the next two patches, the whole thing can be usefully tested.

Differential Revision: https://reviews.llvm.org/D93372
 2020-12-22 11:32:39 +08:00
Zi Xuan Wu
365c405411 [CSKY 2/n] Add basic tablegen infra for CSKY 
This introduce basic tablegen infra such as CSKY{InstrFormats,InstrInfo,RegisterInfo,}.td.
For now, only add instruction definitions for basic CSKY ISA operations, and the instruction format and register info are almost complete.

Our initial target is a working MC layer rather than codegen, so appropriate SelectionDAG patterns will come later.

Differential Revision: https://reviews.llvm.org/D89180
 2020-12-07 11:56:09 +08:00