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OMAP-L138: 代码的执行时间不正常

Part Number: OMAP-L138


我用omap138的dsp核测试了一个函数,发现执行时间过长;

于是,我做了如下验证,只执行了一个float乘法,为什么花费了172个机器周期,请问这正常吗?为什么耗时这么长?

PS: 计时器已做了清零