rz-hexagon/import

LLVM does not define all instructions and registers. That's why we have to import them from the manual. import_instructions.py parses a .txt version of the SYSTEM chapter, parses the encoding, asm string and name into an LLVM style and stores it as .json file.

gen_registers.py does the same for a given list of registers. The list of system registers can be retrieved by compiling assembly instructions which use all system registers once. Afterwards it can be decompiled with the SDKs objdump.

The .json files are than used by LLVMImporter.py to update the LLVM definitions.

It is important to keep in mind, that the instruction and register templates only set those values to a correct value, which are currrently used by LLVMImport.py.