參數(shù)資料
型號(hào): PowerPC 603
廠商: Motorola, Inc.
英文描述: 32-Bit Microprocessor(32位微處理器)
中文描述: 32位微處理器(32位微處理器)
文件頁(yè)數(shù): 17/54頁(yè)
文件大小: 325K
代理商: POWERPC 603
RISC Microprocessor Division
Page 17
When the fetcher fetches instructions into the instruction queue (IQ), it also forwards them to the
branch processing unit (BPU), which scans these instructions for branches. The BPU immediately
begins address calculation for branches found and attempts to fold certain branches out of the
instruction queue (discussed later).
Because branch instructions can change the instruction flow, they can potentially cause stalls in the
instruction pipeline when new instructions must be fetched from the target address. The 603e includes
two mechanisms for reducing the impact of branch instructions: branch folding and branch prediction.
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