What does VLIW mean?
What does VLIW mean?
Very long instruction word (VLIW) refers to instruction set architectures designed to exploit instruction level parallelism (ILP).
What are the differences between superscalar and VLIW?
A superscalar processor is invented to produce an execution cost of higher than one instruction per clock cycle for an individual sequential program….Superscalar Processor.
| VLIW Architecture | Superscalar Processor |
|---|---|
| VLIW is used for static scheduling. | Superscalar is used for dynamic scheduling. |
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.
Which of the parallelism is used by VLIW?
Instruction Level Parallelism
VLIW uses Instruction Level Parallelism, i.e. it has programs to control the parallel execution of the instructions.
What are VLIW instructions and how do they work?
For example, if a VLIW device has five execution units, then a VLIW instruction for the device has five operation fields, each field specifying what operation should be done on that corresponding execution unit. To accommodate these operation fields, VLIW instructions are usually at least 64 bits wide, and far wider on some architectures.
What is the difference between VLIW instruction and superscalar instruction?
Each instruction encodes one operation only. For most superscalar designs, the instruction width is 32 bits or fewer. In contrast, one VLIW instruction encodes multiple operations, at least one operation for each execution unit of a device.
What is very long instruction word (VLIW)?
Very long instruction word (VLIW) refers to instruction set architectures designed to exploit instruction level parallelism (ILP).
What is the VLIW mode of the i860?
In the early 1990s, Intel introduced the i860 RISC microprocessor. This simple chip had two modes of operation: a scalar mode and a VLIW mode. In the VLIW mode, the processor always fetched two instructions and assumed that one was an integer instruction and the other floating-point.
