Arithmetic and RISC pipeline
- 1. Course : BCA Year: 2nd year Session :2018-2019 Section : A Presented By : Manvi Gautam Presented To: Mr . Asheesh Pandey Sir
- 2. The term ”pipeline” means the flow of information. Pipeline is a technique to divide a sequential process into sub-process which are executed in a special dedicated segments that operates concurrently with all other segments .The next segment in pipeline then , uses the result obtained from the computation in previous segments, when data have passed through all segments , find result is obtained. Note : overlapping of computation is made possible by associating a register with each segment in the pipeline.
- 3. Arithmetic pipelines are usually found in most of the computers. They are used for floating point operations, multiplication of fixed point numbers etc. For example: The input to the Floating Point Adder pipeline : X = A*2^a Y = B*2^b Here A and B are mantissas , while a and b are exponents and 2 is radix. The floating point addition and subtraction is done in 4 parts: 1. Compare the exponents. 2.Align the mantissas. 3.Add or subtract mantissas 4 .Produce the result. Registers are used for storing the intermediate results between the above operations.
- 4. Arithmetic pipeline for floating point add/subtract operations
- 5. Reduced Instruction Set Computer(RISC) . The main characteristics of RISC pipeline is to use an efficient instruction pipeline . In case of RISC pipeline, the instruction pipeline can be implemented with only two or three segments where segments 1 fetches the instruction from the memory . Segment 2 executes the instruction in the ALU. And segment 3 may be used to store the results of the ALU operation in a particular register.