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3 Commits

Author SHA1 Message Date
Zi Xuan Wu
4fb282fec5 [CSKY] Add CSKY 16-bit instruction format and encoding 
CSKY is a ARCH which supports mixture of 16-bit and 32-bit instructions natively,
and there is not an indivual predictor or feature to enable/disable 16-bit instruction.
So I think it's better to add 16-bit instruction early, and naturally to use 16-bit and 32-bit instructions.

Differential Revision: https://reviews.llvm.org/D112919
 2021-11-08 10:02:15 +08:00
Zi Xuan Wu
cf78715cae [CSKY] First patch to construct codegen infra and generate first add instruction 
Ooops. It constructs codegen infra and provide only basic code to generate first add instruction successfully.

Differential Revision: https://reviews.llvm.org/D112206
 2021-11-01 10:06:56 +08:00
Zi Xuan Wu
e1c38dd55d [CSKY 1/n] Add basic stub or infra of csky backend 
This patch introduce files that just enough for lib/Target/CSKY to compile.
Notably a basic CSKYTargetMachine and CSKYTargetInfo.

Differential Revision: https://reviews.llvm.org/D88466
 2020-10-10 10:44:08 +08:00