Table of Contents
- 1 What is the advantage to choose VLIW machine instead of superscalar architecture How does this affect hardware and software?
- 2 What is difference between Epic and VLIW?
- 3 What is the advantage of using VLIW instruction?
- 4 How VLIW is different to other processing unit?
- 5 What is a low power version multiplier?
- 6 How to prevent inputs from rippling through the multiplier?
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 difference between Epic and VLIW?
The EPIC architecture is based on VLIW, but was designed to overcome the key limitations of VLIW (in particular, hardware dependence) while simultaneously giving more flexibility to compiler writers.
What is the limitation of VLIW?
VLIW has been perceived as suffering from important limitations, such as the need for a powerful compiler, increased code size arising from aggresive scheduling policies, larger memory bandwidth and register-file bandwidth, limitations due to the lock-step operation, binary compatibility across implementations with …
Why is VLIW beneficial?
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. This means that much more hardware can be devoted to useful computation, bigger on-chip caches etc., meaning faster processors.
What is the advantage of using VLIW instruction?
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.
How VLIW is different to other processing unit?
Whereas conventional central processing units (CPU, processor) mostly allow programs to specify instructions to execute in sequence only, a VLIW processor allows programs to explicitly specify instructions to execute in parallel.
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 )
What are the applications of VLIW architecture?
Applications o VLIW architecture is suitable for Digital Signal Processing applications. o Processing of media data like compression/decompression of Image and speech data. 20.
What is a low power version multiplier?
– Multiplier whose inputs change every cycle, whose output conditionally feeds an ALU •Low Power Version – Inputs are prevented from rippling through multiplier if multiplier output is not selected X X Data Gating Insertion • Two insertion methods
How to prevent inputs from rippling through the multiplier?
– Inputs are prevented from rippling through multiplier if multiplier output is not selected X X Data Gating Insertion • Two insertion methods – Logic synthesizer finds and implements data gating opportunities – RTL code explicitly specifies data gating