RISC Flashcards
(13 cards)
What is RISC?
Reduced instruction Set computer. by comparison, all others are called CISC processors. Most CISC processors are extinct
Why RISC?
CISC was getting too complicated. A microprogramming language had to be used to implement the assembly language. it was the only way to implement the complex instructions.
Why RISC?
While a simple instruction didn’t take a long time to execute, a complex instruction took a very long time to execute
What are the catalysts that allowed RISC processors to come about?
better compiler technology, faster and cheaper memory, ASIC technology
What are some RISC properties?
All instructions can be fetched in a single fetch
Usually 32 bit to allow enough bits in the instruction for complete addressing.
Current RISC Designs
Most have dual primary cache (fetch both branches of a branched instruction)
What is DSP
Digital Signal Processors
It’s an essential building block.
It refers to various techniques for improving the accuracy and reliability of digital communications.
What does DSP do?
Involves reading information from the physical world. Produce output that goes back into the physical world
What does DSP do?
Involves looking at how hardware design is specialised so an efficient way of solving a particular computing problem can be solved. how the hardware can be specialised to solve problems
What does RISC do?
what architectural features speed and slow things down. want to move slower things to faster things.
What does RISC do?
what architectural features speed and slow things down. want to move slower things to faster things.
single Cycle MAC
DSP directly supports it.
Multiple access memory architecture
Normally Harvard architecture
Used for high performance numerically intensive algorithms
