title: why blt instruction don't work? Mars mips assembly
body: <p>I'm tryng to open a file with a list of contacts, and when i verify if are with the correctly format (name ',' number), i use a bgt and a blt instruction to see if the chars are bigger than z or lower than a, so rejected. but when i do this, my blt instruction doesn't work. when its executed jump do the label, and if before i have a beq with a value bigger than the blt, he jumps to. </p>
  
  <pre><code>Maiuscula:
  lb $t0,0($a0)       #carrega a0 em t0
  #slt $t1, $zero,$t0 #carater de t0 com zero
  beq $t0,$zero,END
  nop #se t1=0 entao, t0 tem o carater nulo, logo END
  li $t3,0x41     # A maiusculo em ascii
  li $t4,0x5a     # Z maiusculo em ascii
  slt $t5,$t0,$t4
  bgt $t0,$t4,Erro    #tinha bgt
  nop
  
  blt $t0,$t3,zero    #here is the error
  nop
  
  j minuscula
  nop
  </code></pre>