def whileLoop(condition, code):
labels, jumps = addJumpPoints(1)
return "" + labels[0] + \
condition[0] + \
code + \
"JUMP " + jumps[0] + "\n" + \
condition[1] + ""
def greater(value1, value2, lineno):
to, jump = addJumpPoints(1)
return loadVar(value2, "b", lineno) + \
loadVar(value1, "c", lineno) + \
"RESET d\n" + \
"ADD d c\n" + \
"SUB d b\n" + \
"JZERO d " + jump[0] + "\n" + \
"", to[0]
def greaterOrEqual(value1, value2, lineno):
to, jump = addJumpPoints(2)
return loadVar(value1, "b", lineno) + \
loadVar(value2, "c", lineno) + \
"RESET d\n" + \
"ADD d c\n" + \
"SUB d b\n" + \
"JZERO d " + jump[0] + "\n" + \
"JUMP " + jump[1] + "\n" + \
to[0], to[1]
def p_command_if_else(p):
'''command : IF condition THEN commands ELSE commands ENDIF'''
condition, ifCommand, elseCommand, lineno = p[2], p[4], p[6], p.lineno(1)
labels, jumps = addJumpPoints(1)
p[0] = condition[0] + \
ifCommand + \
"JUMP " + jumps[0] + "\n" + \
condition[1] + \
elseCommand + \
"" + labels[0]
def forDecLoop(iterator, begin, end, code, lineno):
to, jump = addJumpPoints(3)
temp = compiler.addVariableTempo()
valTemp = ("id", temp)
it = ("id", iterator)
return loadVar(end, "e", lineno) + \
varAddress(valTemp, lineno) + \
"STORE e a\n" + \
loadVar(begin, "f", lineno) + \
varAddress(it, lineno) + \
"STORE f a\n" + to[2] +\
loadVar(valTemp, "e", lineno) + \
loadVar(it, "f", lineno) + \
"SUB e f\n" + \
"JZERO e " + jump[0] + "\n" + \
"JUMP " + jump[1] + "\n" + \
to[0] + code + \
loadVar(it, "f", lineno) + \
varAddress(it, lineno) + \
"JZERO f " + jump[1] + "\n" + \
"DEC f\n" + \
"STORE f a\n" + \
"JUMP " + jump[2] + "\n" + to[1]
def p_condition_repeat_greatereq(p):
'''command : REPEAT commands UNTIL value GREATEREQ value SEMICOLON'''
code, value1, value2, lineno = p[2], p[4], p[6], str(p.lineno(1))
condition = less(value1, value2, lineno)
labels, jumps = addJumpPoints(1)
p[0] = "" + labels[0] + code + condition[0] + "JUMP " + jumps[0] + "\n" + condition[1]
def p_condition_repeat_nequal(p):
'''command : REPEAT commands UNTIL value NEQUALS value SEMICOLON'''
code, value1, value2, lineno = p[2], p[4], p[6], str(p.lineno(1))
condition = equal(value1, value2, lineno)
labels, jumps = addJumpPoints(1)
p[0] = "" + labels[0] + code + condition[0] + "JUMP " + jumps[0] + "\n" + condition[1]
