superscalar and VLIW

Question

I want to ask some questions related to ILP.

• A superscalar processor is sort of a mixture of the scalar and vector processor. So can I say that architectures of vector processor follows super-scalar ?

• Processing multiple instructions concurrently does not make an architecture superscalar, since pipelined, multiprocessor or multi-core architectures also achieve that. What does this means?

• I have read ' A superscalar CPU architecture implements a form of parallelism called instruction level parallelism within a single processor', superscalar cant use more than one processor ? Can anyone provide me example where superscalar are used?

• VLIW , I have go through this article there is figure 4 on page 9.It shows a generic VLIW implementation, without the complex reorder buffer and decoding and dispatching logic. The term without decoding is confusing me.

Regards, anas anjaria

Answer 1

Check this article.

Basic difference can be seen in these pictures:

Simple processor:

Superscalar processor:

Answer 2

A superscalar processor is sort of a mixture of the scalar and vector processor.

LOL, no. A superscalar core is a core that can execute more than one instruction per clock cycle.