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在2812下使用IQmath定点数运算与浮点数运算的速度差别



IQmath定点数运算与浮点数运算的速度差别????比如:

float a,b,c;

c=a*b;

若将此运算转换为定点数运算为:

float a,b,c;

_iq    x;

x=_IQmpy(_IQ(a),_IQ(b));

这样子是上面的那个快些还是下面的那个快些?