p?tran

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 12/16/2022

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p?tran

Transposes a real distributed matrix.

Syntax

void pstran (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 pdtran (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 );

Include Files

mkl_pblas.h

Description

The p?tran routines transpose a real distributed matrix. The operation is defined as

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

where:

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

m

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

n

(global) Specifies the number of columns of the distributed matrix sub(C) , 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

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Developer Reference for Intel® oneAPI Math Kernel Library for C

p?tran