#78 bne Machinecode incorrect

[Thomas P.]

Given Program

Address Machinecode	Machinecode in Binary	Assembler Instruction
0x00400000 0x20080000	001000 00000 01000 0000000000000000	addi $t0, $0, 0
0x00400004 0x20090001	001000 00000 01001 0000000000000001	addi $t1, $0, 1
0x00400008 0x0089502A	000000 00100 01001 01010 00000 101010	slt $t2, $a0, $t1
0x0040000C 0x15400003	000101 01010 00000 0000000000000011	bne $t2, $0, 0x3
0x00400010 0x01094020	000000 01000 01001 01000 00000 100000	add $t0, $t0, $t1
0x00400014 0x21290002	001000 01001 01001 0000000000000010	addi $t1, $t1, 2
0x00400018 0x08100002	000010 00000100000000000000000010	j 0x4000008
0x0040001C 0x01001020	000000 01000 00000 00010 00000 100000	add $v0, $t0, $0
------------------------	---------------------------------------	----------------------

ASM-Code which would create the same Machinecode in QTSpim as the given one

addi  $t0, $0, 0        # $t0 = 0
addi  $t1, $0, 1        # $t1 = 1
label_1:
slt   $t2, $a0, $t1     # $t2 = $a0 < $t1 ? 1 : 0
bne   $t2, $0, label_2  # if $t2 == 0 then <label_2>
add   $t0, $t0, $t1     # $t0 = $t0 + $t1
addi  $t1, $t1, 2       # $t1 = $t1 + 2
label_2:                # <<<< This label should be after the jump
j     label_1           # jump <label_1>
add   $v0, $t0, $0      # $v0 = $t0

ASM-Code which actually represents the Machinecode

addi  $t0, $0, 0        # $t0 = 0
addi  $t1, $0, 1        # $t1 = 1
label_1:
slt   $t2, $a0, $t1     # $t2 = $a0 < $t1 ? 1 : 0
bne   $t2, $0, label_2  # if $t2 == 0 then <label_2>
add   $t0, $t0, $t1     # $t0 = $t0 + $t1
addi  $t1, $t1, 2       # $t1 = $t1 + 2
j     label_1           # jump <label_1>
label_2:
add   $v0, $t0, $0      # $v0 = $t0

[James Larus]

Please provide a valid spim program that demonstrate this error. The "Given Program" is not valid input to spim and I cannot reproduce your problem. Also indicate which mode of spim you are using (bare/delayed branches/etc).