TNE - MIPS instruction reference

tneTrap if not equal 
Raises a trap exception if $t1 does not equal $t2, which halts execution in this simulator.
Forms  tne ,   
Operands $t1 Any general-purpose register, $0 to $31, using its numeric or named spelling, such as $8 or $t0 ($zero is $0; $ra is $31). 
$t2 A general-purpose register. It may be the same register as $t1. 
In MARS this halts execution. Opposite of 'teq'.
 # tne stops with a trap when its initialized predicate is true; $t2=99 is never reached.
li $t0, 5
li $t1, 6
tne $t0, $t1
li $t2, 99 # not reached