See https://github.com/riscv/riscv-bitmanip/pull/89

See https://github.com/riscv/riscv-bitmanip/pull/88

https://github.com/riscv/riscv-v-spec/commit/cf03f382ab2e5cfa24874ebc7a190fb0311e3f9a

https://github.com/riscv/riscv-v-spec/commit/aa6032ce9ea4ef8c9f15e7dcb1fa6c7d7ac2d463

https://github.com/riscv/riscv-v-spec/commit/5a0911c56394cc9ae2b5ade60a019cc82b2f926a

https://github.com/riscv/riscv-v-spec/commit/b6c85cdad7c120780c2b6241b316567740c9affe#diff-34bccafef6cfe01367796362310416df

https://github.com/riscv/riscv-v-spec/commit/159124d3da6d1fe693bffc6080ff69876aa66c43#diff-34bccafef6cfe01367796362310416df

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

about two parts
   1. hypervisor related
   2. missing high part for rv32

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

- Prevent got different result in different python env.

See https://github.com/riscv/riscv-v-spec/pull/403/

See https://github.com/riscv/riscv-v-spec/pull/402/

See https://github.com/riscv/riscv-v-spec/pull/351

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

1. vleb is read-only CSR to keep vector implementation lenght in byte
2. mstatus.vs is similar to mstatus.fs and designed to keep vector extension
   state

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>

See https://github.com/riscv/riscv-v-spec/commit/063b128bd91390c64796fe1e1546a8855fdbaf35

See https://github.com/riscv/riscv-v-spec/commit/da9ae36997183141521d3f850a935c99535ae73b

See https://github.com/riscv/riscv-v-spec/commit/c2f3157e34d3a0f77ccbbc502bdf1530da17aba8

See https://github.com/riscv/riscv-v-spec/pull/317

https://github.com/riscv/riscv-v-spec/pull/295

Closes #33

* (Partially) fix #30

With this change (and a renamed parse-opcodes) it's possible to as a
Python module without having to patch the repo.  Example:

  from parse_opcodes import parse_inputs

  if __name__ == "__main__":
      (namelist, pseudos, mask, match, arguments) = parse_inputs(["opcodes", "opcodes-rvc"])

* Fix #30: Rename parse-opcode to parse_opcode to enable module use