topic How to implement the symmetric matrix product which only stored in Intel® oneAPI Math Kernel Library

How to implement the symmetric matrix product which only stored the upper or lower triangle matrix

rockydut — Fri, 10 Aug 2012 09:07:55 GMT

For example, matrix A and B are symmetric matrix, which only stored the upper or lower triangle matrix. There isnt blas function to implement the product of A and B, because the symm function need to store the matrix A and B fully.
So, who can tell me how to implement the symmetric matrix product which only stored the upper or lower triangle matrix.

How to implement the symmetric matrix product which only stored

TimP — Fri, 10 Aug 2012 13:07:45 GMT

Do you mean kernlib TRSMUL/TRSMLU ? Those apparently calculate the product of a symmetric packed matrix with its transpose.

How to implement the symmetric matrix product which only stored

rockydut — Sat, 11 Aug 2012 07:18:08 GMT

I dont know the kernlib.

I means that there are two symmetric matrix A and B, and are stored the Upper or Lower triangle matrix.

For example
1 2 3 4 2 7
A=2 4 5 B= 2 9 3
3 5 6 7 3 2
and A is sotred the Upper triangle matrix as A=[1 2 3 4 5 6]
B is sotred the Upper triangle matrix as B=[4 2 7 9 3 2]
So, which function is used to implement the A*B?

How to implement the symmetric matrix product which only stored

mecej4 — Sun, 12 Aug 2012 01:52:52 GMT

See here:

CernLib writeups