EE 3755 MIPS 1 Due: TBA
Problem 1: Answer the questions without looking anything.(this is practice, so do not
use the simulator program although you may check the correctness of your answer)
LOOP:
0x400000 add $t1, $t2, $t4
addi $t1, $t2,0x20
nop
beq $s0, $s1, LOOP
(For the problem 1.1)
1.1)Write Machine code for the above 4 instructions.
(Hexadecimal format)
Hint :
opcode for add is 0 and func field is 0x20.
opcode for addi is 8 and think about rt and rs fields.
opcode for beq is 4
register number for $t0 is 8
register number for $s0 is 16
What will be the offset value for LOOP when we are using delayed branch?
What will be the offset value for Loop when we are using non delayed branch?
##############################################
START:
0x400000 J LINE1
Nop
Nop
LINE1 beq $s0,$s1,LINE2
add $s1,$s2,$s3
LINE2 nop
(For the problem 1.2)
1.2)Write Machine code for the above 5 instructions.
(Hexadecimal format)
Hint :
opcode for j is 2 .
What will be the offset value for LINE1 and LINE2.
1.3)Compute this branch target address:
0x400000 bne r1, r2, 3
1.4)compute this branch target address
0x40000c bne r1,r2,-3
