What is VLIW in computer architecture?
Very long instruction word (VLIW) describes a computer processing architecture in which a language compiler or pre-processor breaks program instruction down into basic operations that can be performed by the processor in parallel (that is, at the same time).
What is the basic working principle of VLIW processor?
VLIW Architecture – Basic Principles These processors contain multiple functional units, fetch from the instruction cache a Very-Long Instruction Word containing several primitive instructions, and dispatch the entire VLIW for parallel execution.
What are the advantages of VLIW architecture?
Advantages : Reduces hardware complexity. Reduces power consumption because of reduction of hardware complexity. Since compiler takes care of data dependency check, decoding, instruction issues, it becomes a lot simpler.
Is VLIW CISC or RISC?
VLIW instructions are like RISC instructions except that they are longer to allow them to specify multiple, independent simple operations. A VLIW instruction can be thought of as several RISC instructions joined together. The implementation of this function in CISC, RISC, and VLIW code is also shown.
What does VLIW mean?
Very long instruction word
Very long instruction word (VLIW) refers to instruction set architectures designed to exploit instruction level parallelism (ILP).
What are the characteristics of VLIW?
A VLIW has multiple functional units, each handling one instruction from the pack. Every single instruction in a pack gets executed in lockstep. The instructions contained in a pack are statically aligned. They are directly fed into the functional units at run time.
What is VLIW SIMD?
Very Long Instruction Word (VLIW) architectures have multiple functional units to take advantage of vastly available Instruction Level Parallelism (ILP) in such applications. Single Instruction Multiple Data (SIMD) techniques operate on multiple data in a single instruction (exploiting data parallelism).
Where is VLIW architecture used?
Outside embedded processing markets, Intel’s Itanium IA-64 explicitly parallel instruction computing (EPIC) and Elbrus 2000 appear as the only examples of a widely used VLIW CPU architectures.
Who invented VLIW?
Josh Fisher
The concept of VLIW architecture, and the term VLIW, were invented by Josh Fisher in his research group at Yale University in the early 1980s. His original development of trace scheduling as a compiling method for VLIW was developed when he was a graduate student at New York University.
Where is VLIW used?
Is VLIW a MIMD?
VLIW stands for? Explanation: It is the architecture designed to perform multiple operations in parallel. Explanation: ILP stands for Instruction Level Parallelism. Explanation: The MIMD stands for Multiple Instructions Multiple Data.
What is VLIW in DSP?
Very Long Instruction Word (VLIW) architecture in P-DSPs (programmable DSP) increases the number of instructions that are processed per cycle. It is a concatenation of several short instructions and requires multiple execution units running in parallel, to carry out the instructions in a single cycle.