# vim: set filetype=ruby:

# Subtraction A = A - B, A >= 0 and A >= B
register.A = 10                             # register names have to be uppercase
register.B = 3

label(Sub_B)  { decrement B, Stop, Sub_A }  # labels have to be uppercase as well
label(Sub_A)  { decrement A, Stop, Sub_B }
label(Stop)   { halt }