Remember the Boolean expressions for the flags. Use them to solve this problem. • negative = out[31] • zero = (out[31] + out[30] + .. + out[1] + out[0])' • overflow = c_out[31] XOR c_out[30] Also remember that control[0] controls the adder_subtractor in the ALU. Overflow Zero Negative control out= 32 A 000 undefined 001 undefined 010 A + B 32 out 011 А - В 100 A AND B 32 101 A OR B control 110 A NOR B 3 111 A XOR B
Remember the Boolean expressions for the flags. Use them to solve this problem. • negative = out[31] • zero = (out[31] + out[30] + .. + out[1] + out[0])' • overflow = c_out[31] XOR c_out[30] Also remember that control[0] controls the adder_subtractor in the ALU. Overflow Zero Negative control out= 32 A 000 undefined 001 undefined 010 A + B 32 out 011 А - В 100 A AND B 32 101 A OR B control 110 A NOR B 3 111 A XOR B
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
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Question
7
![Remember the Boolean expressions for the flags. Use them to solve this problem.
• negative = out[31]
• zero = (out[31] + out[30] +
• overflow = c_out[31] XOR c_out[30]
... + out[1] + out[0])'
Also remember that control[0] controls the adder_subtractor in the ALU.
control
out=
Overflow
+ Zero
- Negative
32
000
undefined
001
undefined
010
A + B
32
out
011
А — В
100
A AND B
101
A OR B
32
110
A NOR B
control
111
А ХOR B
For the ALU defined above, determine the values of the overflow, negative, and zero flags for the following
values of A, B, and control.
control = 011
A = Oxa999c26f
B = Oxd01ea86e
Overflow =
Negative =
Zero =
3.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F14b79da1-57d0-4cb1-b671-07965b9199d7%2Fdca5312c-8e23-4a0c-9f53-d47f4e7b5b78%2Fhlhmzjr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Remember the Boolean expressions for the flags. Use them to solve this problem.
• negative = out[31]
• zero = (out[31] + out[30] +
• overflow = c_out[31] XOR c_out[30]
... + out[1] + out[0])'
Also remember that control[0] controls the adder_subtractor in the ALU.
control
out=
Overflow
+ Zero
- Negative
32
000
undefined
001
undefined
010
A + B
32
out
011
А — В
100
A AND B
101
A OR B
32
110
A NOR B
control
111
А ХOR B
For the ALU defined above, determine the values of the overflow, negative, and zero flags for the following
values of A, B, and control.
control = 011
A = Oxa999c26f
B = Oxd01ea86e
Overflow =
Negative =
Zero =
3.
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