Reduced instruction set computer - risc, Computer Engineering

Assignment Help:

Reduced Instruction Set Computer (RISC):

As we discussed before most of the modern CPUs are of the GPR (General Purpose Register) type. A few instances of such type of CPUs are the, IBM 360, Intel 80x86 ,Motorola 68xxx and DEC VAX But as these CPUS were obviously better than previous accumulator and stack based CPUs they were yet lacking in various areas:

1. The instructions were of varying length from 1 byte to 6-8 bytes. It is reason of problems with the pre- fetching and pipelining of instructions.

2. ALU (Arithmetic Logical Unit) instructions could have operands that were memory locations. Since the number of cycles it takes to access memory varies so does the all instruction. It isn't good for pipelining, compiler writers and several multiple issues.

3. Most of the ALU instruction had only 2 operands where 1 of the operands is also the destination. It means this operand is cracked in the time operation or it ought to be saved before somewhere.

Therefore in the early 80's the idea of RISC was come. The SPARC project was begun at Berkeley and the MIPS project at Stanford. RISC means Reduced Instruction Set Computer. The ISA is composed of instructions that all have accurately the similar size, typically 32 bits. so they can be pipelined  and pre-fetched and successfully. All of the ALU instructions have 3 operands which are just registers. Only memory access is throughout explicit LOAD/STORE instructions. Therefore A = B + C can be assembled as:

LOAD   R1, A

LOAD   R2, B

ADD     R3, R1, R2

STORE C, R3


Related Discussions:- Reduced instruction set computer - risc

Explain parameter passing in procedures, Q. Explain Parameter Passing in Pr...

Q. Explain Parameter Passing in Procedures? Parameter passing is a very vital concept in assembly language. It makes assembly procedures more general. Parameter can be passed t

States briefly the generic framework for e-commerce, States briefly the gen...

States briefly the generic framework for e-commerce. Generic framework of e-commerce comprises the Applications of e-commerce (as like banking, shopping within online stores an

Smart card & e-cash, Smart Card & E-Cash E-cash storable smart cards ca...

Smart Card & E-Cash E-cash storable smart cards can kept and dispense cash electronically, making bills and coins lesser essential. It transfers funds over phone lines, making

How blocking and non blocking statements get executed, How blocking and non...

How blocking and non blocking statements get executed? Execution of blocking assignments can be viewed just like a one-step process: 1. Evaluate RHS (right-hand side equatio

Define memory read and write operation, Define Memory read and write operat...

Define Memory read and write operation The transfer of information from a memory word to outside environment is known as read operation. The transfer of new information to be k

Explain the quantization error of an ADC, Explain the Quantization error...

Explain the Quantization error of an ADC. Ans. Quantization error- An analog voltage is within the range of 0 to 1V and for 3 bit output, the size of all intervals are

Explain functions introduction, Common used functions are placed within lib...

Common used functions are placed within libraries in the SQABasic directory. Files ending with ".SBH" have the public interface they give to other libraries and scripts. Files endi

How to load dos from hard disk, Q. How to Load DOS from Hard Disk? To L...

Q. How to Load DOS from Hard Disk? To Load DOS from the Hard Disk of your computer, follow these steps: 1. Turn on the power ON/OFF switch of the CPU unit of your PC the pow

Reference table and a reference field, A field containing currency amounts ...

A field containing currency amounts (data type CURR) must be assigned to a reference table and a reference field. Explain. As a reference table, a system having all the valid

Define the boolean algebra, Define The Boolean algebra? A set of rules in...

Define The Boolean algebra? A set of rules invented by the English mathematician George Boole describe certain propositions whose outcome would be either true or false with regar

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