"""
Created by Yann N. Dauphin on 2008-11-11.
Copyright (c) 2008 Lambda Tree Media. All rights reserved.
You only need to modify this file to add or remove instructions.
This file defines:
- The Assembly Language that is supported
- The machine code that is generated
So the compiler is easily retargetable.
"""
# Decompopes an instructions into multiple named sections
# Format: ('name', size)
INSTRUCTION_FORMAT = (
('OP', 4),
('OP1', 4),
('OP2', 4),
('OP3', 4),
)
# List of available registers
REGISTERS = {
'R0': 0x0,
'R1': 0x1,
'R2': 0x2,
'R3': 0x3,
'R4': 0x4,
'R5': 0x5,
'R6': 0x6,
'R7': 0x7,
'R8': 0x8,
'R9': 0x9,
'R10': 0xA,
'R11': 0xB,
'R12': 0xC,
'R13': 0xD,
'R14': 0xE,
'R15': 0xF,
}
# List and Format of available instructions
INSTRUCTIONS = {
('ADD', 'REG', 'REG', 'REG') : (('OP', 0x0), 'OP1', 'OP2', 'OP3'),
('SUB', 'REG', 'REG', 'REG') : (('OP', 0x1), 'OP1', 'OP2', 'OP3'),
('SHR', 'REG', 'REG', 'REG') : (('OP', 0x2), 'OP1', 'OP2', 'OP3'),
('SHL', 'REG', 'REG', 'REG') : (('OP', 0x3), 'OP1', 'OP2', 'OP3'),
('NOT', 'REG', 'REG') : (('OP', 0x4), 'OP1', 'OP2'),
('AND', 'REG', 'REG', 'REG') : (('OP', 0x5), 'OP1', 'OP2', 'OP3'),
('OR', 'REG', 'REG', 'REG') : (('OP', 0x6), 'OP1', 'OP2', 'OP3'),
('MOV', 'REG', 'REG') : (('OP', 0x7), 'OP1', 'OP2'),
('MOV', 'REG', 'ADR') : (('OP', 0x8), 'OP1', ('OP2', 'OP3')),
('MOV', 'ADR', 'REG') : (('OP', 0x9), ('OP2', 'OP3'), 'OP1'),
('MOV', 'REG', 'NUM') : (('OP', 0xA), 'OP1', ('NEXT', ('OP','OP1', 'OP2', 'OP3'))),
('JMP', 'ADR') : ((('OP', 'OP1'), 0xC0), ('OP2', 'OP3')),
('JZ', 'ADR') : ((('OP', 'OP1'), 0xC1), ('OP2', 'OP3')),
('JNZ', 'ADR') : ((('OP', 'OP1'), 0xC2), ('OP2', 'OP3')),
('JNEG', 'ADR') : ((('OP', 'OP1'), 0xC3), ('OP2', 'OP3')),
('JPOS', 'ADR') : ((('OP', 'OP1'), 0xC4), ('OP2', 'OP3')),
('LDX', 'REG') : (('OP', 0xB), 'OP1'),
('STX', 'REG') : (('OP', 0xD), 'OP1'),
('STOP',) : (('OP', 0xF),),
}
