libgade-codegen

This is code generation helper tool for my libgade emulator side project.

It takes a list of instructions for a Sharp LR35902 CPU opcodes.lst and generates an Ada method for each of them based on the patterns defined in mktables.spec. It should be easy to adapt to generate code for other languages and/or architecture, the similar Zilog Z80 comes to mind.

How to run:

Assuming you have Python 2.7 installed simply:

python codegen.py

The generated files are the following:

• Gade-Instructions.ads Instruction definitions, one procedure per opcode.
• Gade-Instructions.adb Instruction implementations, one procedure per opcode.
• Gade-Instruction_Table.ads Tables of pointers to the generated methods, for instruction decoding/lookup.

TODO:

• Explain the simple pattern replacement syntax in here
• Generate replaceable operand labels