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

How can we decrement and increment operations, How can we decrement and in...

How can we decrement and increment  operations We  can  implement decrement  and increment  operations  by  using  a  combinational circuit  or  binary  down/up counters.  In

What is state and state diagram, What is state and state diagram? A sta...

What is state and state diagram? A state is an abstraction of values and links of an object. Set of values and links are grouped together into a state according to the group be

Sequential logic gates - sr flip flop, Sequential Logic Gates SR flip ...

Sequential Logic Gates SR flip flop                                                                                                                    1)

What is scsi, What is SCSI? Ans: It is the acronym for small computer s...

What is SCSI? Ans: It is the acronym for small computer system interface. It refers to a standard bus explained ANSI. Devices such as disks are linked to a computer via 50-wire

Subsequent step in karnaugh map, The subsequent step in Karnaugh map is to ...

The subsequent step in Karnaugh map is to map truth table in the map. Mapping is done by putting a 1 in respective square belonging to 1 value in truth table. This mapped map is us

Disadvantages of pipeline - computer architecture, Disadvantages of pipelin...

Disadvantages of pipeline: Pipeline architecture has 2 major disadvantages.  First is its complexity and second is the inability to constantly run the pipeline at full speed,

What is meant by opening a data file, What is meant by opening a data file ...

What is meant by opening a data file A data file is a file that can be read from or written to. Data files are particularly useful when large amounts of data are involved. Each

What is the mips assembly code, Question: (a) Using an appropriate dia...

Question: (a) Using an appropriate diagram, illustrate the structure of an instruction used for branching purposes and state the purpose of each part. (b) Given the number

Assembly language programes, Program to calculate the value of the series 1...

Program to calculate the value of the series 1+x+x2+x3+.... +xn. Read the values of ''x'' and ''n'' from the keyboard.

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