When a branch is taken in beq or bne instructions, an offset is added to the PC instead of overwriting PC with a new address. What is a disadvantage of this branching method? Since the branch offset specification is limited to 16 bits of the machine-coded instruction, any branch taken will have a restricted jump distance The resulting machine code cannot be loaded anywhere in instruction memory Adding an offset to the PC may overflow that register More clock cycles are required to update the PC when adding an offset
When a branch is taken in beq or bne instructions, an offset is added to the PC instead of overwriting PC with a new address. What is a disadvantage of this branching method? Since the branch offset specification is limited to 16 bits of the machine-coded instruction, any branch taken will have a restricted jump distance The resulting machine code cannot be loaded anywhere in instruction memory Adding an offset to the PC may overflow that register More clock cycles are required to update the PC when adding an offset
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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When a branch is taken in beq or bne instructions, an offset is added to the PC instead of overwriting PC with a new address. What is a disadvantage of this branching method?
Since the branch offset specification is limited to 16 bits of the machine-coded instruction, any branch taken will have a restricted jump distance |
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The resulting machine code cannot be loaded anywhere in instruction memory |
||
Adding an offset to the PC may overflow that register |
||
More clock cycles are required to update the PC when adding an offset |
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