2023.02.14
C extension
VC was designed under the constraint that each RVC instruction expands into a single 32-bit instruction in either the base ISA (RV32I/E, RV64I, or RV128I) or the F and D standard extensions where present. Adopting this constraint has two main benefits:
设计宗旨：可以轻松扩展成32位指令
设计优势
- 位架构改动小
- 编译器可以不用关系（若要考虑代码膨胀率更好），可以完全交给汇编器和连接器