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Superscalar architecture was designed to increase the speed of the scalar processor. But it has been realized it's not easy to apply. Subsequent are a number of problems faced in the superscalar architecture:
• It is needed that extra hardware should be given for hardware parallelism like decoder and arithmetic units, instruction registers etc.
• Scheduling of instructions dynamically to diminish the pipeline delays and to keep all processing units busy is very hard.
Another option to increase speed of processor is to use a series of instructions having no dependency and might need various resources so avoiding resource conflicts. The concept is to unite these independent instructions in a compact long word integrating many operations to be executed concurrently. So this architecture is known as "very long instruction word (VLIW) architecture". Actually long instruction expressions carry the opcode of various instructions that are dispatched to several functional units of the processor. In this manner all the operations to be implemented concurrently by the functional units are synchronized in a VLIW instruction. The size of VLIW instruction word may be in hundreds of bits. VLIW instructions should be formed by compacting small instruction words of conventional program. The job of compaction in VLIW is completed by compiler. The processor should have the enough resources to implement all the operations in VLIW word concurrently.
All digital devices are made from circuits whichcan be switched between two possible states.These two states are represented by a voltagelevel at the output of the circuit e.g. 0V
Which of the memories stores the most number of bits ? Ans. most number of bits stores in 32M x 8 As 2 5 x 2 20 = 2 25 Therefore 1M = 2 20 = 1K x 1K = 2 10 x 2 10
Syntax and Semantics: Propositional logic is prohibited in its expressiveness: so just to represent true and false facts for the world. By a type of extending propositional lo
What are the requirements to design Combinational Logic ? Ans . Design Requirements of Combinational Logic:- (i) By the specifications of circuit, we find out the
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Define miss penalty? The extra time required to bring the desired information into the cache is known as miss penalty.
Suppose that the working register W contains the value 0x4F, the register FSR contains the value 0x2B; the register with address 0x2B contains 0x2F and the instruction ADDWF INDF,
A program is backward compatible if it can use files from an older version of itself. For a file saved in the program to be backward compatible, it must be possible to open the fil
Write a BASH/C shell script which takes name of one or more files as a command line argument, and prints the following information for each file: owner, number of words in the file
What is the difference between Synchronous and Asynchronous updates? A program asks the system to perform a particular task, and then either waits or doesn't wait for the task
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