Could scaleFactor be negative?

[k_kun_wang]

I am wondering whether I could setscaleFactor to be negative integer in the function

IppStatus ippsMul_16s_ISfs(const Ipp16s * pSrc, Ipp16s * pSrcDst, int len, int scaleFactor);

Thanks.

[Intel_C_Intel]

Hi,

Yes. The scale factor can be negative, positive, or zero. Scaling of an integer result is done by multiplying the output vector values by 2** (-scaleFactor ) before the function returns.

if (scaleFactor > 0) pDst = output >> scaleFactor

if (scaleFactor < 0) pDst = output<< ( - scaleFactor)

Thanks