### tests the extra instructions

      .text

main:
      addi  $3,$0, 0x7FF0
      addi  $2,$0, 4
      lw    $4, 0($2)       # mem contents = FFFFFFFF (-1)
      add   $5,$2,$4        # $5 = 4 + -1 = 3
      beq   $0,$5,skip      # branch not taken
skip:
      addi  $6,$0,3         #  $6  = 3
      beq   $5,$6,skip2     # branch taken
      addi  $7, $0, 1       # should not be executed
skip2:
      addi  $8, $0, 2       # last instruction
      sw    $8, 0($2)       # store out to memory
      lw    $9, 0($2)       # read into register 9 = 2
      sub   $8,$8,$4        # $8 = 2 - (-1) = 3
loop:
      add   $6,$6,$4        # decrement 6
      bne   $0,$6,loop      # loop until zero
      andi  $3,$4,0x0F02    # $3 = 0x0F02
      or    $5,$3,$2        # $6 = 0x0F06
      slt   $2, $4, $3      # $4 < $3, so $2 = 1

# register contents at end:
#  $r0 = 0
#  $r1 = 0
#  $r2 = 1
#  $r3 = 0x00000F02
#  $r4 = 0xFFFFFFF
#  $r5 = 0x0000F06
#  $r6 = 0
#  $r7 = 0  (if = 1, then branch not working)
#  $r8 = 3
#  $r9 = 2


      
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