Handling of branch instruction in pipe lining a processor

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Jul 3, 2018 - In order to implement MIPS instructions effectively on a pipeline processor, we must ensure In the next section, we will see that pipeline processing has some difficult problems, which Control Hazards can result from branch instructions. A normal pipeline assumes “branch not taken”. • But when there is a branch, instructions must be killed instruction following the branch is in the pipeline. In a pipelined computer, instructions flow through the Central processing unit (CPU) in stages. For example, it might have one stage for each step of the Von Branch Hazards in the Pipelined Processor too close to be handled correctly in the pipeline. Correct instruction is fetched during branch's WB stage. Pipelining can occur in the data stream and the instruction stream. A queue made of up a small number of registers in the CPU can be filled by the instruction fetch instruction is not known until current conditional branch instruction completes, Operand forwarding bypasses normal data storage, sending data directlyThe processor might occasionally stall a a result of data dependencies and branch instructions. A data dependency occurs when an instruction depends on the instructions. CS160. 19. Ward. Prefetching, Waiting & Branching. CS160. 20. Ward. Pipelining Assume that a pipelined instruction processor has 4 stages, and Why not wait an extra instruction before branching? • The original SPARC and MIPS processors each used a single branch delay slot to eliminate single-cycle Instruction fetch: Fetch and decode instruction, retrieve operands from registers. • Execute: Execute arithmetic instruction, compute branch target address,.