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[RVC] Implement all "C" instructions #130

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[RVC] Implement all "C" instructions#130
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@mortbopet
mortbopet
opened on Oct 2, 2021

Currently, only a subset of the compressed instructions are implemented:

Ripes/src/assembler/rv_c_ext.h

Lines 30 to 35 in 957eb95

instructions.push_back(CAType(Token("c.and"), 0b11, 0b100011));
instructions.push_back(CAType(Token("c.subw"), 0b00, 0b100111));
instructions.push_back(CAType(Token("c.addw"), 0b01, 0b100111));
instructions.push_back(CAType(Token("c.or"), 0b10, 0b100011));
instructions.push_back(CAType(Token("c.xor"), 0b01, 0b100011));
instructions.push_back(CAType(Token("c.sub"), 0b00, 0b100011));

The remainder of the ISA extension should also be implemented. Refer to page 82 of https://riscv.org/wp-content/uploads/2017/05/riscv-spec-v2.2.pdf for the full list.

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