Code density and smaller faster programs, Computer Engineering

Assignment Help:

Q. Code Density and Smaller Faster Programs?

Memory was very expensive in older computer. So there was a need of less memory utilization, which is it was cost effective to have smaller compact programs. So it was opined that instruction set must be more complex so that programs are smaller. But increased complexity of instruction sets had resulted ininstruction sets and addressing modes needing more bits to represent them. It is said that code compaction is significanthowever cost of 10 percent more memory is often far less than cost of reducing code by 10 percent out of CPU architecture innovations.

Smaller programs are beneficialsince they need smaller RAM space. Though today memory is very cheap and this potential benefit today isn't so compelling. More significant small programs must enhance performance. How? Fewer instructions mean fewer instruction bytes to be fetched.

Though problem with this reasoning is that it isn't certain that a CISC program will be smaller than corresponding RISC program. In several cases CISC program represented in symbolic machine language may be smaller however the number of bits of machine code program might not be noticeably smaller. This might result from reason that in RISC we employ register addressing and less instruction that require fewer bits in general. Additionally the compilers on CISCs frequently favour simpler instructions so that conciseness of complex instruction rarely comes into play.


Related Discussions:- Code density and smaller faster programs

Define the system users, Q. Define the System users? System users are d...

Q. Define the System users? System users are defined as the people who employ information systems or who are affected by information system on a regular basis i.e. validating,

Build data flow diagrams showing functional dependencies, Build data Flow d...

Build data Flow diagrams showing functional dependencies Data flow diagrams are very useful for showing functional dependencies. In data flow diagrams processes are indicated

What is a linked list, What is a linked list? Linked list: A linked l...

What is a linked list? Linked list: A linked list is a self referential structure which having a member field that point to the similar structure type. In simple term, a link

What is enctype, ENCTYPE="application/x-www-form-urlencoded" and in its pl...

ENCTYPE="application/x-www-form-urlencoded" and in its place use ENCTYPE="text/plain". The subsequent illustration displays a general form which includes some of the commo

What is jmx architecture, JMX is based on a 3-level architecture:   ?...

JMX is based on a 3-level architecture:   ? The Probe level have the probes (known as MBeans) instrumenting the resources. Also known as the Instrumentation level. ? The A

Show packing and unpacking data, Q. Show Packing and Unpacking Data? P...

Q. Show Packing and Unpacking Data? Packing and Unpacking Data  pvm_packs - Pack active message buffer with arrays of prescribed data type: int info = pvm_pac

Assembly Language, Write an assembly program to simulate a microwave

Write an assembly program to simulate a microwave

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