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The purpose of this assignment is to become familiar with the add and sub instructions. Addin' 'n Subtractin' 1. Assume the following values are stored at the indicated memory addresses and register Address Value Register Zeax Value ex5e0 OXED exsee ex504 ex78 Xebx 8X93FA1C9C exse8 Вx79 Xecx ex7 exsec OXF1 Xedx exA Fill in the following table, showing the effects of the indicated instructions, and showing wi register (state the smallest unit that is affected) or memory location that would be change its new value. Also, show the OF and CF values AFTER the instruction executes. Assume ea instruction is independent of the others. In other words, the initial conditions specified o hold for each of the instructions shown below. SHOW ALL VALUES IN HEXADECIMAI What Changed? list address or register) Instruction New Value (in hex) 1. subb $0xA, 12(%eax) 2. subb 8(%eax), %dl 3. addl %ebx, %ebx 4. addl %ecx, (Хеах) 5. addb %dl, 8(%eax) 6. subl %edx, 4(%eax) 7. subl %edx, %ecx 8. subb %bl, %bh

The purpose of this assignment is to become familiar with the add and sub instructions. Addin' 'n Subtractin' 1. Assume the following values are stored at the indicated memory addresses and register Address Value Register Zeax Value ex5e0 OXED exsee ex504 ex78 Xebx 8X93FA1C9C exse8 Вx79 Xecx ex7 exsec OXF1 Xedx exA Fill in the following table, showing the effects of the indicated instructions, and showing wi register (state the smallest unit that is affected) or memory location that would be change its new value. Also, show the OF and CF values AFTER the instruction executes. Assume ea instruction is independent of the others. In other words, the initial conditions specified o hold for each of the instructions shown below. SHOW ALL VALUES IN HEXADECIMAI What Changed? list address or register) Instruction New Value (in hex) 1. subb $0xA, 12(%eax) 2. subb 8(%eax), %dl 3. addl %ebx, %ebx 4. addl %ecx, (Хеах) 5. addb %dl, 8(%eax) 6. subl %edx, 4(%eax) 7. subl %edx, %ecx 8. subb %bl, %bh

Computer Networking: A Top-Down Approach (7th Edition)
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
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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ADDING AND SUBTRACTING The purpose of this assignment is to become familiar with the add and sub instructions. Addin' 'n Subtractin' 1. Assume the following values are stored at the indicated memory addresses and registers: Register %eax Address Value Value Ox500 ØX93FA1C9C Ox500 OXED Ox504 Ox7B %ebx Ox508 Ox79 %ecx Ox7 Ox50C OXF1 %edx OxA Fill in the following table, showing the effects of the indicated instructions, and showing what register (state the smallest unit that is affected) or memory location that would be changed and its new value. Also, show the OF and CF values AFTER the instruction executes. Assume each instruction is independent of the others. In other words, the initial conditions specified above hold for each of the instructions shown below. SHOW ALL VALUES IN HEXADECIMAL. What Changed? (list address or register) Instruction New Value (in hex) OF CF 1. subb $0xA, 12(%eax) 2. subb 8(%eax), %dl 3. addl %ebx, %ebx 4. addl %eсx, (%еаx) 5. addb %d1, 8(%eax) 6. subl %edx, 4(%eax) 7. subl %edx, Жесх 8. subb %bl, %bh 9. subb %bh, %bl 10. addb %bl, %bh 11. addb %bh, %bl 12. subl %eax, %eax
Transcribed Image Text:ADDING AND SUBTRACTING The purpose of this assignment is to become familiar with the add and sub instructions. Addin' 'n Subtractin' 1. Assume the following values are stored at the indicated memory addresses and registers: Register %eax Address Value Value Ox500 ØX93FA1C9C Ox500 OXED Ox504 Ox7B %ebx Ox508 Ox79 %ecx Ox7 Ox50C OXF1 %edx OxA Fill in the following table, showing the effects of the indicated instructions, and showing what register (state the smallest unit that is affected) or memory location that would be changed and its new value. Also, show the OF and CF values AFTER the instruction executes. Assume each instruction is independent of the others. In other words, the initial conditions specified above hold for each of the instructions shown below. SHOW ALL VALUES IN HEXADECIMAL. What Changed? (list address or register) Instruction New Value (in hex) OF CF 1. subb $0xA, 12(%eax) 2. subb 8(%eax), %dl 3. addl %ebx, %ebx 4. addl %eсx, (%еаx) 5. addb %d1, 8(%eax) 6. subl %edx, 4(%eax) 7. subl %edx, Жесх 8. subb %bl, %bh 9. subb %bh, %bl 10. addb %bl, %bh 11. addb %bh, %bl 12. subl %eax, %eax
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