Use of overlapped register windows, Computer Engineering

Assignment Help:

Q. Use of Overlapped Register Windows?

Register file comprises 138 registers. Let them be called by register number 0 - 137. 

Diagram demonstrates the use of registers: when there is call to function A(fA) that calls function B (fB) and function B calls function C (fC).

1726_Use of Overlapped Register Windows.png

Figure: Use of three Overlapped Register Windows

Please note the functioning of registers: at any instance of time global registers and only one window of registers is visible and is addressable as if it were only set of registers. So for programming purpose there can be only 32 registers. Window in the above illustration though has a total of 138 registers. This window comprises: 

  • Global registers that are shareable by all functions.
  • Parameters registers for holding parameters passed from previous function to current function. They also hold results which are to be passed back.
  • Local registers which hold the local variables as assigned by compiler.
  • Temporary registers: They are physically same as the parameter registers at subsequent level. This overlap allows parameter passing without actual movement of data.

 


Related Discussions:- Use of overlapped register windows

What is basic time division switching, What is Basic Time Division Switch...

What is Basic Time Division Switching? Basic Time Division Switching: The functional blocks of a memory based time division switching switch is demonstrated in figure and i

What is supply chain management, What is Supply Chain Management? Suppl...

What is Supply Chain Management? Supply Chain Management: Supply Chain Management includes developing the performance of an organization's supply chain from its suppliers to

Micooperation, please suggest me ,how to write microopertions,and study for...

please suggest me ,how to write microopertions,and study for computer architecture

What are the applications of edi in business, What are the applications of ...

What are the applications of EDI in business A.  Organistions that use EDI Extensive users of EDI contain: BHS- is a UK and European retailer dealing majorly in appare

Sort, quick sort working

quick sort working

What is a compiler, What is a compiler? A Compiler is a program that ac...

What is a compiler? A Compiler is a program that accepts a program written in a high level language and creates an object program.

Write a short notes on storage classes in c, Write a short notes on storage...

Write a short notes on storage classes in C. Every variable and function in C has two attributes : type and storage class. The four storage classes are automatic, external, reg

Show block diagram of sequential circuits, Q. Show block Diagram of sequent...

Q. Show block Diagram of sequential circuits? A sequential circuit is an interconnection of storage elements and combinational circuits. The storage elements known as flip-flop

Define functionality of application layer in tcp/ip protocol, Define the fu...

Define the functionality of application layer in TCP/IP protocol stack? Function of Application Layer: The top layer within the Internet reference model is the applicatio

Massively parallel system and scalability, Massively Parallel System Re...

Massively Parallel System Refers to a parallel computer system having a great number of processors. The number in a great number of keeps increasing and currently it means more

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