IQmath的_IQ26rsmpy()函数参数传递问题

您可以看一下C2000ware安装文件夹内的文档

C2000Ware_2_00_00_02/libraries/math/IQmath/c28/docs/IQmath_Quickstart.pdf

This function multiplies two IQ number with rounding and saturation. In cases where the calculation may possibly exceed the range of the IQ variable, then this operation will round and then saturate the result to the maximum IQ value range before storing.

四舍五入的饱和处理乘法，该函数的input是两个IQ类型的数据

Let us assume that we use IQ26 are GLOBAL_Q format. This means that the range of the numbers is approximately [-32.0, 32.0]

Example :

Compute Y = M*X in IQ26 format with rounding and saturation. _iq26 Y, M, X;

M=_IQ26(-10.9); // M=-10.9

X=_IQ26(4.5); // X=4.5

Y = _IQ26rmpy(M,X); // Y= -32.0, saturated to MIN

在IQmathLib.h中的定义如下

extern    long _IQ26rsmpy(long A, long B);