Use the single cycle model to answer the following questions. The following inst
ID: 3886142 • Letter: U
Question
Use the single cycle model to answer the following questions. The following instruction is to be executed: sw $t1, 4($t2). The instruction is located at 0 times 00401000. Assume that $t1 holds a - 1 and $t2 holds 0 times 10010010 Give the values of the following i. output of sign-extend ii. output of shift left 2 iii. inputs to ALU control iv. output from MUX before registers v. output from MUX before ALU vi. output from ALU vii. output from adder at top left viii. output from adder at top rightExplanation / Answer
Consider the following data:
Address of instruction=0×00401000
Value of $t1=-1
Value of $t2=0×10010010
The instruction to execute: sw $t1, 4($t2).
The instruction means store the value t1 at address given by value of t2 + offset (4)
The address where the value must be stored will be: - t2+offset (4)
=0×10010010 + 00000100
=0×10010110
Address to store the value -1 = 0×10010110
i. Output of sign extension:-
Ans:- To store the value of 8 bits, bits required = 0×10010110
Now, sign extended will be 8+8=16 bits,
then the answer will be: -
0×0000000010010110
ii. Output of shift left 2
Ans: - Output of shift left 2 is equal to multiplication by 4 i.e
multiply 0×10010110 by 0×00000100=0×1001011000
iii. Inputs to ALU control
Ans: -Since the input to ALU control is Input values and function to be performed
Hence, instruction is sw $t1, 4($t2).
Thus, input will be: -
Values: -
$t1
4($t2)
Function:-
Sw
iv. Output from MUX before registers
The output to the MUX before registers are:-
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