How Can I Do fixed point all matrix functions supported to 4X4square Matrix with real and imaginary part

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How Can I Do fixed point all matrix functions supported to 4X4square Matrix with real and imaginary part.
fixed point addition 32 bit (qformat 32).
fixed point subtraction 32 bit (qformat 32).
fixed point multiplication 32 bit (qformat 32).
fixed point division 32 bit (qformat 32).
struct matrix
{
int real;
int imag;
};

please share code