[理工] 計組 MIPS、Extime 的問題

看板Grad-ProbAsk作者qa012499 (小李子)時間10年前 (2014/02/10 21:06)推噓5(5推 0噓 12→)

留言17則, 5人參與討論串1/1

題目: Two implementations of a machine are one with and one without special floating-point hardware. Both machine have a clock rate of 1000 M HZ. Promgram mix of operations in following. floating-point multiply 10% floating-point add 20% floating-point divide 5% integer instructions 65% Machine with floating-point called A requires the following number of clock cycles for each instruction. floating-point multiply 7 floating-point add 5 floating-point divide 20 integer instructions 2 Machine without floating-point called B must the emulate the floating-point operations using integer instructions. The integer instructions all take 2 clock cycles. Other floating-point operations require the following number of integer instructions. floating-point multiply 40 floating-point add 20 floating-point divide 50 Q:If machine A needs 300 million instructions for this program , MIPS A is 250, MIPS B is 500, what is the execution time for this program run on machine A and B ? 不好意思題目有點長，可以請板上大大替我求解嗎? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 112.104.88.196

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