The completed program follows.
Here
is the complete program,
suitable to copy to a file and to run with SPIM.
When you run it, set the PC to 0x400000 (as usual)
and also use the set value menu to set $2 to
a temperature.
Run the program with different temperatures
and check that $3 is set correctly.
## tempRange.asm ## ## Check that 30 <= temp <= 55 ## Set flag to 1 if in range, to 0 if out of range ## ## Registers: ## $2 --- temperature ## $3 --- in/out range indicator flag ## $8 --- scratch.text .globl main # Set range indicator to 1 main: 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 flag to 0 cont: sll $0,$0,0 # target for the jump
Could the no-op instructions
( the sll)
be removed without affecting the program?