Implement several compressed instructions for RISCV (#290) #112

Job	Run time
build-test-on-armt2	2m 51s
build-test-on-arm32	2m 49s
build-test-on-aarch64	1m 27s
build-test-on-loongarch64	2m 35s
build-test-on-riscv32	3m 24s
build-test-on-riscv32-extensions	2m 24s
build-test-on-riscv64	2m 22s
build-test-on-riscv64-extensions	2m 10s
build-test-on-s390x	2m 50s
build-test-on-x86	23s
build-test-on-x64	17s
	23m 32s

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