ippmLoadIdentity_ma_64f_L how to use?

dhabets — Wed, 09 Feb 2005 04:11:29 GMT

I have an array of matrices and want to set all the matrices to the identity matrix. How do I do this using ippmLoadIdentity_ma_64f_L?

Ipp64f matrixa[] = {
8, 8, 8, 8,
8, 8, 8, 8,
8, 8, 8, 8,
8 ,8 ,8, 8
};
Ipp64f matrixb[] =
{
4, 4, 4, 4,
4, 4, 4, 4,
4, 4, 4, 4,
4, 4, 4, 4
};

Ipp64f matrixc[] =
{
2, 2, 2, 2,
2, 2, 2, 2,
2, 2, 2, 2,
2, 2, 2, 2
};

Ipp64f* pmatrix[] = { matrixb, matrixc, matrixa };

IppStatus status;
status = ippmLoadIdentity_ma_64f_L((const Ipp64f**)pmatrix,0, 0, 0, 4, 4, 3);

It's probably something easy, but what's wrong about the above?

Re: ippmLoadIdentity_ma_64f_L how to use?

Vladimir_Dudnik — Wed, 23 Mar 2005 18:02:21 GMT

Hi,

The right call is

status = ippmLoadIdentity_ma_64f_L(

(Ipp64f**)pmatrix, 0 , 4*sizeof(Ipp64f), sizeof(Ipp64f), 4, 4, 3);

In MX the stride meaning is address increment (difference) between sequential elements in the row (Stride2) and in the column (Stride1) really. All strides are set explicitly for contiguous array too.

Regards,
Vladimir

topic ippmLoadIdentity_ma_64f_L how to use? in Intel® Integrated Performance Primitives

ippmLoadIdentity_ma_64f_L how to use?

Re: ippmLoadIdentity_ma_64f_L how to use?