No.
The
program can be made slightly shorter by
removing the no-op instruction filling the
first delay slot.
The instruction following it
(the sltiu)
will always execute, sometimes uselessly,
but never will do damage.
The second no-op, however, is essential.
If it is missing, the next instruction, the
ori
sets the flag to zero regardless of the branch instruction.
This is a common bug, and can be very frustrating because
sometimes the result is correct.
# Set range indicator to 1
ori $3,$0,1 # set to 1
# Test 30 <= temp <= 55
sltiu $8,$2,56 # $8=1 if temp <= 55
beq $8,$0,out # 0? out of range
sll $0,$0,0 # delay
sltiu $8,$2,30 # $8=1 if temp < 30
beq $8,$0,cont # 0? in range
sll $0,$0,0 # delay
# Out of Range: clear range indicator to 0
out:
ori $3,$0,0 # clear to 0
cont: sll $0,$0,0 # target for the jump
## End of file
(Review:) What other type of instruction is followed by a delay slot?