What is VLIW Processor architecture?

What is VLIW Processor 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 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.

What type of architecture is used for DSP processor?

DSPs are usually optimized for streaming data and use special memory architectures that are able to fetch multiple data or instructions at the same time, such as the Harvard architecture or Modified von Neumann architecture, which use separate program and data memories (sometimes even concurrent access on multiple data …

In which of the DSP processor family VLIW architecture is introduced?

Along with the above systems, during the same time (1989–1990), Intel implemented VLIW in the Intel i860, their first 64-bit microprocessor, and the first processor to implement VLIW on one chip.

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 the advantage 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.

What are the advantages of VLIW processor?

Advantages of VLIW are:

• Performance similar to CISC and RISC.
• Reduced hardware complexity over a superscalar implementation.
• Uses instruction level parallelism to the fullest.
• VLIW is a simpler way to build a superscalar microprocessor.

What are the features of DSP processor?

They provide high-speed data processing by implementing single instruction, multiple data (SIMD) operations, special instructions for superscalar architectures cores, single-cycle MAC or fused multiply–add (FMA) computation, parallel computation in several MAC units, fast data streaming using DMA, circular buffering …

What is Harvard architecture in DSP?

Harvard architecture refers to a memory structure in which the processor is connected to two independent memory banks via two independent sets of buses. This type of memory architecture is used in many DSP families including the Analog Devices ADSP21xx.

What are the advantages and disadvantages of VLIW architecture?

VLIW has both advantages and disadvantages. The main advantage is the saving in hardware — the compiler now decides what can be executed in parallel, and the hardware just does it. There is no need to check for dependencies or decide on scheduling — the compiler has already resolved these issues.

What is the advantage to choose VLIW machine instead of superscalar architecture How does this affect hardware and software?

How does this affect hardware and compiler complexity? VLIW can issue multiple operations per cycle with simple hardware. Out-of-order superscalar need complex control logic. Independent operations are scheduled statically by the compiler into the same VLIW instruction.

What is VLIW architecture in P DSP?

Explain VLIW architecture in details. Explain VLIW architecture in details. Very Long Instruction Word (VLIW) architecture in P-DSPs (programmable DSP) increases the number of instructions that are processed per cycle.

What are the features of the VLIW architecture?

Features : The processors in this architecture have multiple functional units, fetch from the Instruction cache that have the Very Long Instruction Word. Multiple independent operations are grouped together in a single VLIW Instruction. They are initialized in the same clock cycle.

What is an example of a VLIW processor?

20. Examples of VLIW processor o VLIW Mini supercomputers: Multiflow TRACE 7/300, 14/300, 28/300 Multiflow TRACE /500 Cydrome Cydra 5 IBM Yorktown VLIW Computer o Single-Chip VLIW Processors: Intel iWarp, Philip’s LIFE Chips o Single-Chip VLIW Media (through-put) Processors: Trimedia, Chromatic, Micro-Unity o DSP Processors (TI TMS320C6x )

How does visualvliw architecture deal with parallelism?

VLIW Architecture deals with it by depending on the compiler. The programs decide the parallel flow of the instructions and to resolve conflicts. This increases compiler complexity but decreases hardware complexity by a lot.