?trbr2d

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

?trbr2d

Receives and participates in a broadcast along a scope for a trapezoidal matrix.

Syntax

void itrbr2d(const MKL_INT *contxt, const char *scope, const char *top, const char *uplo,
  const char *diag, const MKL_INT *m, const MKL_INT *n, MKL_INT *a, const MKL_INT *lda,
  const MKL_INT *rsrc, const MKL_INT *csrc);

void strbr2d(const MKL_INT *contxt, const char *scope, const char *top, const char *uplo,
  const char *diag, const MKL_INT *m, const MKL_INT *n, float *a, const MKL_INT *lda,
  const MKL_INT *rsrc, const MKL_INT *csrc);

void dtrbr2d(const MKL_INT *contxt, const char *scope, const char *top, const char *uplo,
  const char *diag, const MKL_INT *m, const MKL_INT *n, double *a, const MKL_INT *lda,
  const MKL_INT *rsrc, const MKL_INT *csrc);

void ctrbr2d(const MKL_INT *contxt, const char *scope, const char *top, const char *uplo,
  const char *diag, const MKL_INT *m, const MKL_INT *n, float *a, const MKL_INT *lda,
  const MKL_INT *rsrc, const MKL_INT *csrc);

void ztrbr2d(const MKL_INT *contxt, const char *scope, const char *top, const char *uplo,
  const char *diag, const MKL_INT *m, const MKL_INT *n, double *a, const MKL_INT *lda,
  const MKL_INT *rsrc, const MKL_INT *csrc);

Input Parameters

icontxt

Integer handle that indicates the context.

scope

Indicates what scope the broadcast should proceed on. Limited to ‘Row’, ‘Column’, or ‘All’.

top

Indicates the communication pattern to use for the broadcast.

uplo , diag , m , n , lda: Describe the matrix to be sent. See Matrix Shapes for details.

rsrc

The process row coordinate of the process that called broadcast/send.

csrc

The process column coordinate of the process that called broadcast/send.

Output Parameters

a: An array of dimension (lda,n) to receive the incoming message into.

Description

This routine receives and participates in a broadcast along a scope. At the end of a broadcast, all processes within the scope will possess the data in the trapezoidal matrix A . Broadcasts may be globally-blocking. This means no process is guaranteed to return from a broadcast until all processes in the scope have called the appropriate routine (broadcast/send or broadcast/receive).

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Developer Reference for Intel® oneAPI Math Kernel Library for C

?trbr2d

Syntax

Input Parameters

Output Parameters

Description