jump-table.py

#!/usr/bin/env python3
from sys import exit

TAB=" "*4

#Read in instruction macro steps from csv
OP_INFO={}
with open("op-codes.csv") as f:
    #Assume first line is headers
    line=f.readline()
    line=f.readline()
    while(line):
        #Strip off \n at end
        line_symbols=line[:-1].split(",")
        if line_symbols[1]!="":
            OP_INFO[int(line_symbols[0],16)]=tuple(line_symbols[1:])
        line=f.readline() 

OP_FULL_NAMES={}      
with open("instructions.s","wt") as f:
    f.write(TAB+"#Instruction routines\n")
    f.write(TAB+"instructions_begin:\n\n")
    for i in range(256):
        if i in OP_INFO:
            op_name=OP_INFO[i][0]
            op_mode=OP_INFO[i][1]
            op_full=op_name+"_"+op_mode
            f.write(TAB+f"#0x{hex(i)[2:].upper()} - {op_name} {op_mode}\n")
            f.write(TAB+f"{op_full}:\n")
            f.write(TAB*2+f'OP_MACRO {i}, {op_name}, {op_mode}, {op_full}, ')
            for j in range(2,6):
                f.write(str(OP_INFO[i][j])+", ")
            f.write("\n")
            f.write(TAB*2+f"NEXT_MACRO\n")
            f.write("\n")
        else:
            op_full="NOP_0x"+hex(i)[2:].upper()
            f.write(TAB+f"#0x{hex(i)[2:].upper()} - NOP\n")
            f.write(TAB+f"{op_full}:\n")
            f.write(TAB*2+f'OP_MACRO {i}, NOP, IMP, {op_full}, , , , , \n')
            f.write(TAB*2+f"NEXT_MACRO\n")
            f.write("\n")
        OP_FULL_NAMES[i]=op_full
    f.write(TAB+"instructions_end:\n")
    f.write(TAB+".set instructions_size, instructions_end-instructions_begin\n")

with open("jump-table.s","wt") as f:
    f.write(TAB+"#Jump table\n")
    f.write(TAB+"jump_table_begin:\n\n")

    f.write(TAB+"jump_table_raw:\n")
    for i in range(256):
        f.write(TAB+f".word {OP_FULL_NAMES[i]}\n")
    f.write("\n");
        
    f.write(TAB+"jump_table_end:\n")   
    f.write(TAB+".set jump_table_size, jump_table_end-jump_table_begin\n")