topic Re: vector direct product in Intel® Integrated Performance Primitives

vector direct product

hagai_sela — Wed, 11 Mar 2009 23:13:22 GMT

Hi,
Is there any function I can use in IPP or MKL to calculate the vector direct product of two vector arrays? I am currently using ippmMul_vca in a loop but it's really slow.

Hagai.

Re: vector direct product

Gennady_F_Intel — Sat, 14 Mar 2009 17:33:21 GMT

Hi,

regardingIPP:
Please see ippmDotProduct( ..... ) functions compute dot product of two vectors or Vector-vector arrays operations: Case 1: Vector - vector operation. Case 2: Vector array - vector operation Case 3: Vector array - vector array operation

MKL:
There are no such operations with arrays in MKL, but there are some functions of vector-vector multiplication for dense and sparse formats:
?dot( ... ) for computing a vector-vector dot product
?doti( .... ) for computing the dot product of a compressed sparse real vector by a full-storage real vector.

Re: vector direct product

hagai_sela — Sat, 14 Mar 2009 21:43:12 GMT

Hi,
Thanks for your answer.
I don't need to dot product - I need the "vector direct product" (multiply each item in the first vector by each item in the second vector).

http://mathworld.wolfram.com/VectorDirectProduct.html

Re: vector direct product

Gennady_F_Intel — Sun, 15 Mar 2009 15:57:14 GMT

Upps, I am sorry -:). There are no such functions in both our libraries. I'd recommend you submit this Feature Request at http://premier.intel.com