Why do we need registers, Computer Engineering

Assignment Help:

Why do we need Registers?

If tcpu is cycle time of CPU which is the time taken by CPU to execute a well-defined micro-operation employing registers and tmem is memory cycle time which is the speed at which memory can be accessed by CPU then (tcpu/tmem) is in the range of 2 to 10 i.e. CPU is 2 - 10 times faster than memory. So CPU registersare the fastest temporary storage areas. So the instructions whose operands are stored in fast CPU registers can be executed fast in comparison to instructions whose operands are in main memory of a computer. Every instruction should designate the registers it will address. So a machine needs a large number of registers.

1440_Why do we need Registers.png

Figure: CPU with general register organisation


Related Discussions:- Why do we need registers

Drawback of indirect addressing, Q. Drawback of indirect addressing? • ...

Q. Drawback of indirect addressing? • Drawback of this scheme is that it needs two memory references to fetch actual operand. First memory reference is to fetch the actual addr

Properties of e-cash, Properties: 1.  Monetary Value: Monetary value mu...

Properties: 1.  Monetary Value: Monetary value must be backed by either cash, bank - authorized credit cards or bank certified cashier's cheque. 2.  Interoperability: E-cash

What is an arithmetic processor, Q. What is an arithmetic processor? A ...

Q. What is an arithmetic processor? A distinctive CPU necessitates most of the control and data processing hardware for implementing non-arithmetic functions. As the hardware c

Make a generalized program that accepts a number and base, Q. Make a gener...

Q. Make a generalized program that accepts a number & base, convert it into the given base. Perform necessary validations.

Help, Write a class encapsulating the concept of a circle? I have been work...

Write a class encapsulating the concept of a circle? I have been working on this program for awhile and this is all I have so far... What are my flaws in the program besides not ha

Explain the types of computer architecture, Explain the types of computer a...

Explain the types of computer architecture Computer architecture can be divided into three main categories: Instruction Set Architecture, or ISA, is the image of a computing

What is mmu, What is MMU? MMU is the Memory Management Unit. It is a sp...

What is MMU? MMU is the Memory Management Unit. It is a special memory control circuit used for executing the mapping of the virtual address space onto the physical memory.

Connector of conventional keyboard, 5-pin DIN connector: It is the conn...

5-pin DIN connector: It is the connector of conventional keyboard which have 5 pins (2 IN, 2 OUT and one ground pin) used for transfer and synchronization.

Colour management, There are three primary colours in pigments - Red, Yello...

There are three primary colours in pigments - Red, Yellow and Blue. There are two ways to produce more colours:   Physical Mixing: Physically mix colours to produce a new colour

Structural hazards - computer architecture, Structural hazards - computer a...

Structural hazards - computer architecture: A structural hazard takes place when a part of the processor's hardware is required by 2 or more than two instructions at the same

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd