assembler: refactor and start tests
This commit is contained in:
parent
5084bb7771
commit
96e8eb95b0
|
|
@ -0,0 +1,17 @@
|
|||
from creole_asm import *
|
||||
import unittest
|
||||
|
||||
class ProgramTest(unittest.TestCase):
|
||||
def test_oneline(self):
|
||||
p = Program()
|
||||
p.parse_asm_line("PUSH r0")
|
||||
b = p()
|
||||
self.assertEqual(b, b'\x01\xC2\x80\x00')
|
||||
def test_large_reg(self):
|
||||
p = Program(regnum=0x8000000)
|
||||
p.parse_asm_line("PUSH r134217727")
|
||||
b = p()
|
||||
self.assertEqual(b, b'\x01\xFC\x87\xbf\xbf\xbf\xbf\x00')
|
||||
|
||||
if __name__ == "__main__":
|
||||
unittest.main()
|
||||
110
creole_asm.py
110
creole_asm.py
|
|
@ -2,56 +2,66 @@
|
|||
|
||||
from enum import Enum
|
||||
|
||||
class MalformedArgument(Exception):
|
||||
pass
|
||||
|
||||
class ArgType(Enum):
|
||||
TYPE_IMM = 1
|
||||
TYPE_REG = 2
|
||||
TYPE_VAL = 3
|
||||
TYPE_LAB = 4
|
||||
IMM = 1
|
||||
REG = 2
|
||||
VAL = 3
|
||||
LAB = 4
|
||||
|
||||
def gettype(s):
|
||||
if s.isnumeric():
|
||||
return (TYPE_IMM, int(s))
|
||||
return (ArgType.IMM, int(s))
|
||||
elif s[0] == 'r' and s[1:].isnumeric():
|
||||
return (TYPE_REG, int(s[1:]))
|
||||
return (ArgType.REG, int(s[1:]))
|
||||
elif s[0] == 'l' and s[1:].isnumeric():
|
||||
return (TYPE_LAB, int(s[1:]))
|
||||
return (ArgType.LAB, int(s[1:]))
|
||||
else:
|
||||
return None
|
||||
raise MalformedArgument(s)
|
||||
|
||||
def typecheck(self, s):
|
||||
t = ArgType.gettype(s)
|
||||
if t is None:
|
||||
return None
|
||||
if self == TYPE_VAL:
|
||||
return t[0] == TYPE_REG or t[0] == TYPE_IMM
|
||||
if self == ArgType.VAL:
|
||||
return t[0] == ArgType.REG or t[0] == ArgType.IMM
|
||||
else:
|
||||
return t[0] == self
|
||||
|
||||
class OpcodeException(Exception):
|
||||
pass
|
||||
class TypecheckLenException(Exception):
|
||||
pass
|
||||
class TypecheckException(Exception):
|
||||
pass
|
||||
class Instruction:
|
||||
def __init__(self, opcode, argtypes):
|
||||
if opcode > 0x7F or opcode < 0:
|
||||
raise OpcodeException(opcode)
|
||||
|
||||
self.opcode = opcode
|
||||
assert self.opcode < 0x80 and self.opcode >= 0
|
||||
self.argtypes = argtypes
|
||||
def typecheck(self, sargs):
|
||||
rargs = []
|
||||
if len(sargs) != len(self.argtypes):
|
||||
return None
|
||||
raise TypecheckLenException(sargs, self.argtypes)
|
||||
for i in range(0, len(sargs)):
|
||||
if not self.argtypes[i].typecheck(sargs[i]):
|
||||
return None
|
||||
raise TypecheckException(self.argtypes[i],
|
||||
sargs[i])
|
||||
rargs.append(ArgType.gettype(sargs[i]))
|
||||
return rargs
|
||||
|
||||
instructions = {
|
||||
"NOP" : Instruction(0, []),
|
||||
"PUSH" : Instruction(1, [ArgType.TYPE_REG]),
|
||||
"POP" : Instruction(2, [ArgType.TYPE_REG]),
|
||||
"ADD" : Instruction(3, [ArgType.TYPE_VAL, ArgType.TYPE_VAL, ArgType.TYPE_VAL]),
|
||||
"MUL" : Instruction(4, [ArgType.TYPE_VAL, ArgType.TYPE_VAL, ArgType.TYPE_VAL]),
|
||||
"DIV" : Instruction(5, [ArgType.TYPE_VAL, ArgType.TYPE_VAL, ArgType.TYPE_VAL]),
|
||||
"JL" : Instruction(6, [ArgType.TYPE_LAB, ArgType.TYPE_VAL, ArgType.TYPE_VAL]),
|
||||
"CLB" : Instruction(7, [ArgType.TYPE_LAB]),
|
||||
"SYS" : Instruction(8, [ArgType.TYPE_VAL])
|
||||
"nop" : Instruction(0, []),
|
||||
"push" : Instruction(1, [ArgType.REG]),
|
||||
"pop" : Instruction(2, [ArgType.REG]),
|
||||
"add" : Instruction(3, [ArgType.VAL, ArgType.VAL, ArgType.VAL]),
|
||||
"mul" : Instruction(4, [ArgType.VAL, ArgType.VAL, ArgType.VAL]),
|
||||
"div" : Instruction(5, [ArgType.VAL, ArgType.VAL, ArgType.VAL]),
|
||||
"jl" : Instruction(6, [ArgType.LAB, ArgType.VAL, ArgType.VAL]),
|
||||
"clb" : Instruction(7, [ArgType.LAB]),
|
||||
"sys" : Instruction(8, [ArgType.VAL])
|
||||
}
|
||||
|
||||
encoding_types = {
|
||||
|
|
@ -66,18 +76,31 @@ encoding_types = {
|
|||
# B : Total number of bits excluding high bits
|
||||
}
|
||||
|
||||
class InvalidNumberException(Exception):
|
||||
pass
|
||||
class InvalidLengthException(Exception):
|
||||
pass
|
||||
def encode_pseudo_utf8(n, high_bits, to):
|
||||
if n < 0:
|
||||
raise InvalidNumberException(n)
|
||||
if to is None or to < 0:
|
||||
for k in sorted(encoding_types):
|
||||
if n <= encoding_types[k][0]:
|
||||
to = k
|
||||
break
|
||||
if to is None:
|
||||
raise InvalidNumberException(n)
|
||||
if to > 8 or to < 0:
|
||||
return None
|
||||
raise InvalidLengthException(to)
|
||||
elif to == 1:
|
||||
if n < 0x80:
|
||||
return bytes([n])
|
||||
else:
|
||||
return None
|
||||
raise InvalidNumberException(n,to)
|
||||
|
||||
(maxval, start_byte, n_tot) = encoding_types[to]
|
||||
if n > maxval or high_bits > 15:
|
||||
return None
|
||||
raise InvalidNumberException(n, high_bits)
|
||||
n = n | (high_bits << n_tot)
|
||||
all_bytes = []
|
||||
for i in range(0, to - 1):
|
||||
|
|
@ -86,32 +109,47 @@ def encode_pseudo_utf8(n, high_bits, to):
|
|||
all_bytes.append(start_byte | n)
|
||||
return bytes(reversed(all_bytes))
|
||||
|
||||
class RangeCheckException(Exception):
|
||||
pass
|
||||
class Line:
|
||||
def __init__(self, opcode, args):
|
||||
def __init__(self, opcode, args, labnum, regnum):
|
||||
self.opcode = opcode
|
||||
self.args = args
|
||||
for a in args:
|
||||
if a[0] == ArgType.REG:
|
||||
if a[1] < 0 or a[1] >= regnum:
|
||||
raise RangeCheckException(a[0],
|
||||
a[1],
|
||||
regnum)
|
||||
elif a[0] == ArgType.LAB:
|
||||
if a[1] < 0 or a[1] >= labnum:
|
||||
raise RangeCheckException(a[0],
|
||||
a[1],
|
||||
regnum)
|
||||
|
||||
def __call__(self):
|
||||
b = bytes([self.opcode])
|
||||
for a in args:
|
||||
if a[0] == TYPE_REG:
|
||||
for a in self.args:
|
||||
if a[0] == ArgType.REG:
|
||||
b = b + encode_pseudo_utf8(a[1],1,None)
|
||||
else:
|
||||
b = b + encode_pseudo_utf8(a[1],0,None)
|
||||
return b + bytes([0])
|
||||
|
||||
class InstructionNotFoundException(Exception):
|
||||
pass
|
||||
class Program:
|
||||
def asm_push_line(self, ins, args):
|
||||
self.asm.append(Line(ins, args))
|
||||
self.asm.append(Line(ins, args, self.labnum, self.regnum))
|
||||
|
||||
def parse_asm_line(self, line):
|
||||
line = line.split()
|
||||
line[0] = line[0].casefold()
|
||||
if line[0] not in instructions:
|
||||
raise Exception
|
||||
raise InstructionNotFoundException(line[0])
|
||||
else:
|
||||
ins = instructions[line[0]]
|
||||
args_w_type = ins.typecheck(line[1:])
|
||||
if r is None:
|
||||
raise Exception
|
||||
self.asm_push_line(ins.opcode, args_w_type)
|
||||
|
||||
def __call__(self):
|
||||
|
|
@ -120,5 +158,7 @@ class Program:
|
|||
b = b + line()
|
||||
return b
|
||||
|
||||
def __init__(self):
|
||||
def __init__(self, labnum=16, regnum=16):
|
||||
self.asm = []
|
||||
self.labnum = labnum
|
||||
self.regnum = regnum
|
||||
|
|
|
|||
Loading…
Reference in New Issue