What is the advantage of VLIW CPU over superscalar?

What is the advantage of VLIW CPU over superscalar?

The big advantage of VLIW, then, is that a highly concurrent (parallel) implementation is much simpler and cheaper to build than equivalently concurrent RISC or CISC chips. VLIW is a simpler way to build a superscalar microprocessor .

Is VLIW superscalar?

Superscalar and Very Long Instruction Word (VLIW) are parallel architectural models based on Flynn’s Taxonomy. Both superscalar and VLIW architectures are capable of executing multiple instructions at one cycle. Each uses a different method for instruction scheduling.

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 processor?

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 are the advantages and disadvantages of VLIW?

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 a superscalar processor characteristics?

A superscalar processor is a mixture of the two. Each instruction processes one data item, but there are multiple execution units within each CPU thus multiple instructions can be processing separate data items concurrently.

What are superscalar processors explain the structure of a typical superscalar processor?

Superscalar architecture is a method of parallel computing used in many processors. In a superscalar computer, the central processing unit (CPU) manages multiple instruction pipelines to execute several instructions concurrently during a clock cycle.

What is meant by superscalar processor?

A superscalar processor is a CPU that implements a form of parallelism called instruction-level parallelism within a single processor. Each execution unit is not a separate processor (or a core if the processor is a multi-core processor), but an execution resource within a single CPU such as an arithmetic logic unit.

What is a superscalar machine?

A superscalar processor is a specific type of microprocessor that uses instruction-level parallelism to help to facilitate more than one instruction executed during a clock cycle. This depends on analysis of the instructions to be carried out and the use of multiple execution units to triage these instructions.

What is the difference between superscalar and VLIW architecture?

Both superscalar and VLIW architectures are capable of executing multiple instructions at one cycle. Each uses a different method for instruction scheduling. While superscalar processors execute instructions dynamically, VLIW uses static scheduling of program instructions.

What are the limitations of the superscalar processor?

The limitations of the Superscalar processor are prominent as the difficulty of scheduling instruction becomes complex. The intrinsic parallelism in the instruction stream, complexity, cost, and the branch instruction issue get resolved by a higher instruction set architecture called the Very Long Instruction Word (VLIW) or VLIW Machines.

What is the difference between VLIW and central processing unit processors?

Central processing unit processors enable programs to designate instructions to execute in order only whereas a VLIW processor enables programs to explicitly determine instructions to implement in parallel. This design is designed to enable higher implementation without the complexity inherent in some different designs.

What is the difference between RISC and VLIW?

VLIW has a similar philosophy as RISC (Reduced Instruction Set Computer) because of its simple hardware and instructions, but the hard work in VLIW design is done by the compiler, unlike RISC and superscalar architectures.