Homework #4 Solutions

1. Encode each of the following MIPS assembly language instructions and indicate the corresponding MIPS machine code instruction given as a hexadecimal value.

(a) and $t3, $s1, $s2

0x02325824

(b) srlv $a0, $t2, $t3

0x014B2006

0x29224ECA

2. Consider the following MIPS assembly language code segment and provide the MIPS machine code for the branch instruction (bleq).

while:
blez $t0, endwhile
addi $t0, $t0, 1
srl $t3, $t3, 1
mul $t2, $t2, $t0
# This is a count controlled loop.
endwhile:
sw $t2, y

0x19000003

3. Decode each of the following MIPS machine code instructions and indicate the corresponding MIPS assembly language instruction.

(a) 0x02538821

addu $s1, $s2, $s3

(b) 0x0441FF04

bgez $v0, -252