How many times does the processor need to refer to memory when it fetches and executes an indirect- address-mode instruction if the instruction is (a) a computation requiring a single operand; (b) a branch? Need to provide explanation for the provided answers.
How many times does the processor need to refer to memory when it fetches and executes an indirect- address-mode instruction if the instruction is (a) a computation requiring a single operand; (b) a branch? Need to provide explanation for the provided answers.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Topic Video
Question
No ChatGPT please
![**Transcription for Educational Website**
**Question:**
How many times does the processor need to refer to memory when it fetches and executes an indirect-address-mode instruction if the instruction is:
(a) A computation requiring a **single operand**;
(b) A **branch**?
Need to provide explanation for the provided answers.
---
**Explanation:**
In the context of indirect addressing mode, when a processor executes an instruction, it involves specific steps to access the required data:
1. **Indirect Addressing:**
- The memory address of the data is not given directly; instead, a reference to the address is provided. This reference resides in another memory location.
2. **Computation Requiring a Single Operand:**
- **Memory Access #1:** Retrieve the address from where the actual operand's address can be found.
- **Memory Access #2:** Access the memory location using the obtained address to get the single operand required for the computation.
- Hence, two memory accesses are required.
3. **Branching Instruction:**
- **Memory Access #1:** The address of the target location needed for the branch instruction is obtained indirectly.
- Typically, branch instructions use the address to change the flow of the program. No further operand needs to be fetched for the branching to occur.
- Thus, only one memory access is required.
Understanding these steps helps in analyzing processor efficiency and optimizing instruction execution by minimizing memory accesses wherever possible.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faf1ef7c6-a145-4dbc-a50b-84dc7d2e578d%2Fc7e2d508-28fa-4342-a843-0da4fa016590%2Fw2n5xkj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Transcription for Educational Website**
**Question:**
How many times does the processor need to refer to memory when it fetches and executes an indirect-address-mode instruction if the instruction is:
(a) A computation requiring a **single operand**;
(b) A **branch**?
Need to provide explanation for the provided answers.
---
**Explanation:**
In the context of indirect addressing mode, when a processor executes an instruction, it involves specific steps to access the required data:
1. **Indirect Addressing:**
- The memory address of the data is not given directly; instead, a reference to the address is provided. This reference resides in another memory location.
2. **Computation Requiring a Single Operand:**
- **Memory Access #1:** Retrieve the address from where the actual operand's address can be found.
- **Memory Access #2:** Access the memory location using the obtained address to get the single operand required for the computation.
- Hence, two memory accesses are required.
3. **Branching Instruction:**
- **Memory Access #1:** The address of the target location needed for the branch instruction is obtained indirectly.
- Typically, branch instructions use the address to change the flow of the program. No further operand needs to be fetched for the branching to occur.
- Thus, only one memory access is required.
Understanding these steps helps in analyzing processor efficiency and optimizing instruction execution by minimizing memory accesses wherever possible.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Recommended textbooks for you
![Database System Concepts](https://www.bartleby.com/isbn_cover_images/9780078022159/9780078022159_smallCoverImage.jpg)
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
![Starting Out with Python (4th Edition)](https://www.bartleby.com/isbn_cover_images/9780134444321/9780134444321_smallCoverImage.gif)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
![Digital Fundamentals (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780132737968/9780132737968_smallCoverImage.gif)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
![Database System Concepts](https://www.bartleby.com/isbn_cover_images/9780078022159/9780078022159_smallCoverImage.jpg)
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
![Starting Out with Python (4th Edition)](https://www.bartleby.com/isbn_cover_images/9780134444321/9780134444321_smallCoverImage.gif)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
![Digital Fundamentals (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780132737968/9780132737968_smallCoverImage.gif)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
![C How to Program (8th Edition)](https://www.bartleby.com/isbn_cover_images/9780133976892/9780133976892_smallCoverImage.gif)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
![Database Systems: Design, Implementation, & Manag…](https://www.bartleby.com/isbn_cover_images/9781337627900/9781337627900_smallCoverImage.gif)
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
![Programmable Logic Controllers](https://www.bartleby.com/isbn_cover_images/9780073373843/9780073373843_smallCoverImage.gif)
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education