if ( !( a < 0 ) ) { ... } 

if ( a >= 0  ) { ... }

Set on Less Than

The set instructions are used to implement relational operators. However, they do not in themselves alter the flow of control. They set a register to 1 or 0 to show the relation between two values. The slt instruction is used with two's complement integers:

                   #  $s and $t contain
                   #  two's comp. integers
                   #
slt   d,s,t        #  if ( $s < $t )
                   #    d <-- 1
                   #  else
                   #    d <-- 0

The sltu instruction is used with unsigned integers:

                   #  $s and $t contain
                   #  unsigned integers
                   #
sltu  d,s,t        #  if ( $s < $t )
                   #    d <-- 1
                   #  else
                   #    d <-- 0