chunchiu(存儲(chǔ)版)
【正文】 Advantage of RISC 1. RISC is that they can execute their instructions very fast because the instructions are so simple. The instructions usually finish in 4 or 5 processor cycle. 2. Because instruction operand has to store in the register, thus the operation time is unified. 3. RISC are used pipelining, cache memory, less or do not use microcode. 4. More important advantage is that RISC chips require fewer transistors, which makes them cheaper to design and produce. Disadvantage of RISC ? RISC architectures put a greater burden on the software. – Is this worth the trouble because conventional microprocessors are being increasingly fast and cheap anyway? Example of CISC/RISC ? The PowerPC microprocessor(old Mac) , used in IBM39。s Research Division in 1980 the result of a project that began in the 197039。s Pentium microprocessors are CISC microprocessors. Combine RISC and CISC ? RISC takes each of the longer, more plex instructions from a CISC design and reduces it to multiple instructions that are shorter and faster to process. LLH ?Java ?C ?Python ?Scheme ?Prolog ?C++ ?C ?Java script ?Lisp ?Ruby History ? The original RISC prototype puter, called the 801 Miniputer, was built at IBM39。Chun Chiu Overview ? What is RISC? ? Chara
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1