MIPS Reference Sheet
Branch Instructions
Instruction Operation
beq $s, $t, label if ($s == $t) pc += i << 2
bgtz $s, label if($s>0)pc+=i<<2
blez $s, label if ($s <= 0) pc += i << 2
bne $s, $t, label if ($s != $t) pc += i << 2
Arithmetic and Logical Instructions
Jump Instructions
Instruction Operation
add $d, $s, $t $d=$s+$t
addu $d, $s, $t $d=$s+$t
addi $t, $s, i $t = $s + SE(i)
addiu $t, $s, i $t = $s + SE(i)
and $d, $s, $t $d=$s&$t
andi $t, $s, i $t = $s & ZE(i)
div $s, $t lo=$s/$t;hi=$s%$t
divu $s, $t lo=$s/$t;hi=$s%$t
mult $s, $t hi:lo = $s * $t
multu $s, $t hi:lo = $s * $t
nor $d, $s, $t $d = ~($s | $t)
or $d, $s, $t $d=$s|$t
ori $t, $s, i $t = $s | ZE(i)
sll$d,$t,a $d=$t<<a
sllv $d, $t, $s $d=$t<<$s
sra $d, $t, a $d=$t>>a
srav $d, $t, $s $d=$t>>$s
srl$d,$t,a $d = $t >>> a
srlv $d, $t, $s $d = $t >>> $s
sub $d, $s, $t $d=$s-$t
subu $d, $s, $t $d=$s-$t
xor $d, $s, $t $d=$s^$t
xori $d, $s, i $d = $s ^ ZE(i)
Instruction Operation
jlabel pc += i << 2
jal label $31=pc;pc+=i<<2
jalr $s $31=pc;pc=$s
jr $s pc=$s
Load Instructions
Instruction Operation
lb $t, i($s) $t = SE (MEM [$s + i]:1)
lbu $t, i($s) $t = ZE (MEM [$s + i]:1)
lh $t, i($s) $t = SE (MEM [$s + i]:2)
lhu $t, i($s) $t = ZE (MEM [$s + i]:2)
lw $t, i($s) $t = MEM [$s + i]:4
Store Instructions
Instruction Operation
sb $t, i($s) MEM [$s + i]:1 = LB ($t)
sh $t, i($s) MEM [$s + i]:2 = LH ($t)
sw $t, i($s) MEM [$s + i]:4 = $t
Data M oveme nt Inst ruc tions
Constant-Manipulating Instructions Instruction Operation
mfhi $d $d=hi
mflo $d $d=lo
mthi $s hi=$s
mtlo $s lo=$s
Instruction Operation
lhi $t, i HH($t) = i
llo $t, i LH($t) = i
Comparison Instructions
Exception and Interrupt Instructions
Instruction Operation
slt $d, $s, $t $d = ($s < $t)
sltu $d, $s, $t $d = ($s < $t)
slti $t, $s, i $t = ($s < SE(i))
sltiu $t, $s, i $t = ($s < SE(i))
Instruction Operation
trap 1 Print integer value in $4
trap 5 Read integer value into $2
trap 10 Terminate program execution
trap 101 Print ASCII character in $4
trap 102 Read ASCII character into $2
Note: Detailed encoding reference on reverse.
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