def writeAndRead1Instruction(instruction, pointers, fo, opcode,
assembly_failed):
top_byte = opcode
if len(instruction) < 4:
if len(instruction) < 3:
CustomError.ERR_missingArgument(instruction[-1], '1')
return False
CustomError.ERR_missingArgument(instruction[-1], '2')
return False
if instruction[1][0] != 'r':
CustomError.ERR_invalidArgumentType(instruction[-1], '1',
"register reference")
return False
elif instruction[2][0] != 'r':
CustomError.ERR_invalidArgumentType(instruction[-1], '2',
"register reference")
return False
topmid_byte_top_nibble = registers.get(instruction[1], None)
if topmid_byte_top_nibble == None:
CustomError.ERR_invalidValue(instruction[-1], '1')
return False
botmid_byte_top_nibble = registers.get(instruction[2], None)
if botmid_byte_top_nibble == None:
CustomError.ERR_invalidValue(instruction[-1], '2')
return False
if not assembly_failed:
fo.write("{}{}{} {}{}".format(top_byte, topmid_byte_top_nibble, '0',
botmid_byte_top_nibble, "000"))
return True
def instr_Int(instruction, pointers, fo, assembly_failed):
if len(instruction) < 3:
CustomError.ERR_missingArgument(instruction[-1], '1')
return False
if instruction[1][0] == 'd':
temp = int(instruction[1][1:])
if 0 > temp > 255:
CustomError.ERR_invalidValue(instruction[-1], '1')
return False
else:
if not assembly_failed:
fo.write("{}{}{}".format("14", "0e f0", "%2.2x" % temp))
return True
elif len(instruction[1]) == 3 and instruction[1][0] == 'h':
for c in instruction[1][1:]:
if '0' <= c <= '9' or 'a' <= c <= 'f':
continue
else:
CustomError.ERR_invalidValue(instruction[-1], '1')
return False
if not assembly_failed:
fo.write("{}{}{}".format("14", "0e f0", instruction[1][1:]))
return True
else:
CustomError.ERR_invalidArgumentType(instruction[-1], '2',
"d (decimal), h (hexadecimal)")
return False
def instr_Mov(instruction, pointers, fo, assembly_failed):
if len(instruction) < 4:
if len(instruction) < 3:
CustomError.ERR_missingArgument(instruction[-1], '1')
return False
CustomError.ERR_missingArgument(instruction[-1], '2')
return False
if instruction[1][0] != 'r':
CustomError.ERR_invalidArgumentType(instruction[-1], '1',
"register reference")
return False
topmid_byte_top_nibble = registers.get(instruction[1], None)
if topmid_byte_top_nibble == None:
CustomError.ERR_invalidValue(instruction[-1], '1')
return False
if instruction[2][0] == 'r':
topmid_bottom_nibble = registers.get(instruction[2], None)
if topmid_bottom_nibble == None:
CustomError.ERR_invalidArgumentType(instruction[-1], '1',
"register reference")
return False
if not assembly_failed:
fo.write("{}{}{} {}".format("00", topmid_byte_top_nibble,
topmid_byte_bottom_nibble, "0000"))
return True
elif instruction[2][0] == 'd':
if -32768 > int(instruction[2][1:]) > 32767:
CustomError.ERR_invalidValue(instruction[-1], '2')
return False
else:
if not assembly_failed:
fo.write("{}{}{} {}".format(
"00", topmid_byte_top_nibble, '0',
"%4.4x" % (int(instruction[2][1:]))))
return True
elif len(instruction[2]) == 5 and instruction[2][0] == 'h':
for c in instruction[2][1:]:
if '0' <= c <= '9' or 'a' <= c <= 'f':
continue
else:
CustomError.ERR_invalidValue(instruction[-1], '2')
return False
if not assembly_failed:
fo.write("{}{}{} {}".format("00", topmid_byte_top_nibble, '0',
instruction[2][1:]))
return True
else:
CustomError.ERR_invalidArgumentType(
instruction[-1], '2',
"d (decimal), h (hexadecimal) or r (register reference)")
return False
def writeFieldWithStackInstruction(instruction, pointers, fo, opcode,
assembly_failed):
if len(instruction) < 3:
CustomError.ERR_missingArgument(instruction[-1], '1')
return False
if instruction[1][0] != 'r':
CustomError.ERR_invalidArgumentType(instruction[-1], '1',
"register reference")
return False
topmid_byte_top_nibble = registers.get(instruction[1], None)
if topmid_byte_top_nibble == None:
CustomError.ERR_invalidValue(instruction[-1], '1')
return False
if not assembly_failed:
fo.write("{}{}{}".format(opcode, topmid_byte_top_nibble, "e f000"))
return True