[reference model] Função para detectar overflow
Merge branch 'master' of https://github.com/tec499-20142/t02-core-musa
Merge branch 'master' of https://github.com/tec499-20142/t02-core-musa
[reference model] Pilha e instruções tipo j
Merge branch 'master' of https://github.com/tec499-20142/t02-core-musa