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Disassembler.py
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Disassembler.py
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class MipsInstruction:
def __init__(self):
self.source_code = ''
self.name = ''
self.addr = -1
self.rs = -1
self.rt = -1
self.rd = -1
self.sa = 0
self.offset = 0
self.imm = 0
self.index = 0
self.base = 0
self.type = 0
self.format = ''
class Date:
def __init__(self):
self.source_code = ''
self.addr = -1
self.value = 0
def add(mips_ins, line):
mips_ins.name = "add"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 21], 2)
mips_ins.type = 2
mips_ins.format = "ADD R" + str(mips_ins.rd) + ", R" + str(mips_ins.rs) + ", R" + str(mips_ins.rt)
def sub(mips_ins, line):
mips_ins.name = "sub"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 21], 2)
mips_ins.type = 2
mips_ins.format = "SUB R" + str(mips_ins.rd) + ", R" + str(mips_ins.rs) + ", R" + str(mips_ins.rt)
def mul(mips_ins, line):
mips_ins.name = "mul"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 21], 2)
mips_ins.type = 2
mips_ins.format = "MUL R" + str(mips_ins.rd) + ", R" + str(mips_ins.rs) + ", R" + str(mips_ins.rt)
def _and(mips_ins, line):
mips_ins.name = "and"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 21], 2)
mips_ins.type = 2
mips_ins.format = "AND R" + str(mips_ins.rd) + ", R" + str(mips_ins.rs) + ", R" + str(mips_ins.rt)
def nor(mips_ins, line):
mips_ins.name = "nor"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 21], 2)
mips_ins.type = 2
mips_ins.format = "NOR R" + str(mips_ins.rd) + ", R" + str(mips_ins.rs) + ", R" + str(mips_ins.rt)
def slt(mips_ins, line):
mips_ins.name = "slt"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 21], 2)
mips_ins.type = 2
mips_ins.format = "SLT R" + str(mips_ins.rd) + ", R" + str(mips_ins.rs) + ", R" + str(mips_ins.rt)
def beq(mips_ins, line):
mips_ins.name = "beq"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.offset = int(line[16: 32], 2) * 4
# print(mips_ins.offset)
# print(line[16:32])
mips_ins.type = 3
mips_ins.format = "BEQ R" + str(mips_ins.rs) + ", R" + str(mips_ins.rt) + ", #" + str(mips_ins.offset)
def bgtz(mips_ins, line):
mips_ins.name = "bgtz"
mips_ins.rs = int(line[6: 11], 2)
# mips_ins.rt = bin2dec(line[11: 16])
mips_ins.offset = int(line[16: 32], 2) * 4
mips_ins.type = 4
mips_ins.format = "BGTZ R" + str(mips_ins.rs) + ", #" + str(mips_ins.offset)
def bltz(mips_ins, line):
mips_ins.name = "bltz"
mips_ins.rs = int(line[6: 11], 2)
# mips_ins.rt = bin2dec(line[11: 16])
mips_ins.offset = int(line[16: 32], 2) * 4
mips_ins.type = 4
mips_ins.format = "BLTZ R" + str(mips_ins.rs) + ", #" + str(mips_ins.offset)
def sw(mips_ins, line):
mips_ins.name = "sw"
mips_ins.base = int(line[6: 11], 2)
#print(line[6:11])
mips_ins.rt = int(line[11: 16], 2)
mips_ins.offset = int(line[16: 32], 2)
mips_ins.type = 5
mips_ins.format = "SW R" + str(mips_ins.rt) + ", " + str(mips_ins.offset) + "(R" + str(mips_ins.base) + ")"
def lw(mips_ins, line):
mips_ins.name = "lw"
mips_ins.base = int(line[6: 11], 2)
mips_ins.rt = int(line[11: 16], 2)
mips_ins.offset = int(line[16: 32], 2)
mips_ins.type = 5
mips_ins.format = "LW R" + str(mips_ins.rt) + ", " + str(mips_ins.offset) + "(R" + str(mips_ins.base) + ")"
def sll(mips_ins, line):
mips_ins.name = "sll"
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 21], 2)
mips_ins.sa = int(line[21: 26], 2)
mips_ins.type = 6
mips_ins.format = "SLL R" + str(mips_ins.rd) + ", R" + str(mips_ins.rt) + ", #" + str(mips_ins.sa)
def srl(mips_ins, line):
mips_ins.name = "srl"
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 22], 2)
mips_ins.sa = int(line[22: 28], 2)
mips_ins.type = 6
mips_ins.format = "SRL R" + str(mips_ins.rd) + ", R" + str(mips_ins.rt) + ", #" + str(mips_ins.sa)
def sra(mips_ins, line):
mips_ins.name = "sra"
mips_ins.rt = int(line[11: 16], 2)
mips_ins.rd = int(line[16: 22], 2)
mips_ins.sa = int(line[22: 28], 2)
mips_ins.type = 6
mips_ins.format = "SRA R" + str(mips_ins.rd) + ", R" + str(mips_ins.rt) + ", #" + str(mips_ins.sa)
def j(mips_ins, line):
mips_ins.name = "j"
mips_ins.index = int(line[6: 32], 2) * 4
mips_ins.type = 7
mips_ins.format = "J " + " #" + str(mips_ins.index)
def jr(mips_ins, line):
mips_ins.name = "jr"
mips_ins.rs = int(line[6: 11], 2)
mips_ins.type = 8
mips_ins.format = "JR R" + str(mips_ins.rs)
def _break(mips_ins, line):
mips_ins.name = "_break"
mips_ins.type = 9
mips_ins.format = "BREAK"
def parse(mips_instruction, line):
category1 = {"000100": "beq", "000111": "bgtz", "000001": "bltz", "000010": "j", "101011": "sw",
"100011": "lw", "011100": "mul"} # 前6位不全为零的opcode
category1_1 = {"110010": "AND", "100001": "MUL", "110001": "SUB", "110000": "ADD", "110011": "NOR",
"110101": "SLT"} # 前6位不全为零的opcode 且是OP rt, rs, imm形式的指令
category2 = {"100000": "add", "001101": "_break", "001000": "jr", "100100": "_and", "100111": "nor",
"000000": "sll", "100010": "sub", "000011": "sra","101010": "slt",
"000010": "srl"} # 前6位全为零的opcode 除去NOP
mips_instruction.source_code = line
if line[0:] == "00000000000000000000000000000000":
mips_instruction.name = 'nop'
mips_instruction.format = "NOP"
elif line[0: 6] in category1_1:
mips_instruction.name = category1_1.get(line[0: 6])
mips_instruction.rs = int(line[6: 11], 2)
mips_instruction.rt = int(line[11: 16], 2)
mips_instruction.imm = int(line[16: 32], 2)
mips_instruction.type = 1
mips_instruction.format = mips_instruction.name + " R" + str(mips_instruction.rt) +\
", R" + str(mips_instruction.rs) + ", #" + str(mips_instruction.imm)
elif line[0: 6] == '000000':
eval(category2[line[26:32]])(mips_instruction, line)
elif line[0: 6] in category1:
eval(category1[line[0:6]])(mips_instruction, line)