UNIT 1 - INSTRUCTION SET OF MIPS

1. INSTRUCTIONS
Mr. C.KARTHIKEYAN,
ASSISTANT PROFESSOR,
ECE , RMKCET

2. COMPILER, ASSEMBLER, LINKER, LOADER

3. REGISTERS
MIPS ARCHITECTURE
PC

4. INSTRUCTIONS
ARITHMETIC INSTRCTIONS
DATA TRANSFER INSTRCTIONS
LOGICAL INSTRCTIONS
CONDITIONAL BRANCH INSTRCTIONS
UNCONDITIONAL JUMP INSTRCTIONS

5. ARITHMETIC INSTRUCTIONS
ADD
SUBTRACT
ADD IMMEDIATE
add $s1,$s2,$s3
sub $s1,$s2,$s3
addi $s1,$s2,20
$s1 = $s2 + $s3
$s1 = $s2 - $s3
$s1 = $s2 + 20

6. EXAMPLE
f = (g + h) – (i + j)
(g + h) add $s1,$t0,$t1
(i + j) add $s2,$t2,$t3
sub $s0,$s1,$s2

7. DATA TRANSFER INSTRUCTIONS
LOAD WORD
STORE WORD
lw $s1,20($s2)
sw $s1,20($s2)
$s1 = Memory[$s2 +20]
Memory[$s2 +20] = $s1

8. EXAMPLE
f = (g + h) – (i + j)
(g + h) add $s1,$t0,$t1
(i + j) add $s2,$t2,$t3
sub $s0,$s1,$s2
sw $s0,16($s4)
g lw $t0,20($s4)
h lw $t1,24($s4)
i lw $t2,28($s4)
J lw $t3,32($s4)

9. LOGICAL INSTRUCTIONS
AND
SHIFT LEFT LOGICAL
SHIFT RIGHT LOGICAL
AND IMMEDIATE
and $s1,$s2,$s3
sll $s1,$s2,10
srl $s1,$s2,10
andi $s1,$s2,20
$s1 = $s2 & $s3
$s1 = $s2 << 10
$s1 = $s2 >> 10
$s1 = $s2 & 20

10. CONDITIONAL BRANCH INSTRUCTIONS
Branch on Equal
Branch on Not Equal
beq $s1,$s2,25
bne $s1,$s2,25
if($s1==$s2) goto PC+4+100
if($s1!=$s2) goto PC+4+100

11. UNCONDITIONAL JUMP INSTRUCTIONS
Jump J 2500 Goto 10000

12. EXAMPLE
if (i==j)
f = g + h;
else
f = g – h;
lw $t0,28($s4)
lw $t1,32($s4)
lw $t2,20($s4)
lw $t3,24($s4)
bne $t0,$t2,Else
add $s0,$t2,$t3
j Exit
Else sub $s0,$t2,$t3
Exit sw $s0,16($s4)