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CCSTUDIO: CCS12.6.0 IQMath使用时,转换的时间比较长

Part Number: CCSTUDIO

在使用IQmath库时,对一个变量进行IQ格式转换,CCS显示警告: 3195-D(performance)EABI double precision is 64-bits for coff. Consider changing doubles to floats for improved performance in FPU32-mode.

以下为测试函数,对常数进行IQ格式转换需要2个时钟周期,对变量进行IQ格式转换需要283个时钟周期,并显示上述警告,请问该警告应该如何消除

_iq i,j;
float n = 0.5;
i = _IQ(0.5); //2
j = _IQ(n); //283