p?geadd

Developer Reference for Intel® oneAPI Math Kernel Library for C

Download PDF

ID 766684

Date 11/07/2023

Version

Public

A newer version of this document is available. Customers should click here to go to the newest version.

Visible to Intel only — GUID: GUID-52AE0608-BF9F-4943-8CA6-FF45575AA6C5

View Details

p?geadd

Performs sum operation for two distributed general matrices.

Syntax

void psgeadd (const char *trans , const MKL_INT *m , const MKL_INT *n , const float *alpha , const float *a , const MKL_INT *ia , const MKL_INT *ja , const MKL_INT *desca , const float *beta , float *c , const MKL_INT *ic , const MKL_INT *jc , const MKL_INT *descc );

void pdgeadd (const char *trans , const MKL_INT *m , const MKL_INT *n , const double *alpha , const double *a , const MKL_INT *ia , const MKL_INT *ja , const MKL_INT *desca , const double *beta , double *c , const MKL_INT *ic , const MKL_INT *jc , const MKL_INT *descc );

void pcgeadd (const char *trans , const MKL_INT *m , const MKL_INT *n , const MKL_Complex8 *alpha , const MKL_Complex8 *a , const MKL_INT *ia , const MKL_INT *ja , const MKL_INT *desca , const MKL_Complex8 *beta , MKL_Complex8 *c , const MKL_INT *ic , const MKL_INT *jc , const MKL_INT *descc );

void pzgeadd (const char *trans , const MKL_INT *m , const MKL_INT *n , const MKL_Complex16 *alpha , const MKL_Complex16 *a , const MKL_INT *ia , const MKL_INT *ja , const MKL_INT *desca , const MKL_Complex16 *beta , MKL_Complex16 *c , const MKL_INT *ic , const MKL_INT *jc , const MKL_INT *descc );

Include Files

mkl_pblas.h

Description

The p?geadd routines perform sum operation for two distributed general matrices. The operation is defined as

sub(C):=beta*sub(C) + alpha*op(sub(A)),

where:

op(x) is one of op(x) = x, or op(x) = x',

alpha and beta are scalars,

sub(C) is an m-by-n distributed matrix, sub(C)=C(ic:ic+m-1, jc:jc+n-1).

sub(A) is a distributed matrix, sub(A)=A(ia:ia+n-1, ja:ja+m-1).

Input Parameters

trans

(global) Specifies the operation:

if trans = 'N' or 'n', then op(sub(A)) := sub(A);

if trans = 'T' or 't', then op(sub(A)) := sub(A)';

if trans = 'C' or 'c', then op(sub(A)) := sub(A)'.

m

(global) Specifies the number of rows of the distributed matrix sub(C) and the number of columns of the submatrix sub(A), m≥ 0.

n

(global) Specifies the number of columns of the distributed matrix sub(C) and the number of rows of the submatrix sub(A), n≥ 0.

alpha

(global)

Specifies the scalar alpha.

a

(local)

Array, size (lld_a, LOCq(ja+m-1)). This array contains the local pieces of the distributed matrix sub(A).

ia, ja

(global) The row and column indices in the distributed matrix A indicating the first row and the first column of the submatrix sub(A), respectively.

desca

(global and local) array of dimension 9. The array descriptor of the distributed matrix A.

beta

(global)

Specifies the scalar beta.

When beta is equal to zero, then sub(C) need not be set on input.

c

(local)

Array, size (lld_c, LOCq(jc+n-1)).

This array contains the local pieces of the distributed matrix sub(C).

ic, jc

(global) The row and column indices in the distributed matrix C indicating the first row and the first column of the submatrix sub(C), respectively.

descc

(global and local) array of dimension 9. The array descriptor of the distributed matrix C.

Output Parameters

c: Overwritten by the updated submatrix.

Parent topic: PBLAS Level 3 Routines

Select Your Language

Using Intel.com Search

Quick Links

Recent Searches

Advanced Search

Only search in

Developer Reference for Intel® oneAPI Math Kernel Library for C

p?geadd

Syntax

Include Files

Description

Input Parameters

Output Parameters