imatcopy

oneMKL - Data Parallel C++ Developer Reference

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ID 772045

Date 11/07/2023

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imatcopy

Computes an in-place scaled matrix transpose or copy operation using a general matrix.

Description

The imatcopy routine performs an in-place scaled matrix copy or transposition. The operation is defined as:

where:

op(X) is one of op(X) = X, or op(X) = X^T, or op(X) = X^H
alpha is a scalar
AB is a matrix
AB is m x n on input.

imatcopy supports the following precisions:

T
`float`
`double`
`std::complex<float>`
`std::complex<double>`

imatcopy (Buffer Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    void imatcopy(sycl::queue &queue,
                  oneapi::mkl::transpose trans,
                  std::int64_t m,
                  std::int64_t n,
                  T alpha,
                  sycl::buffer<T, 1> &ab,
                  std::int64_t lda,
                  std::int64_t ldb);
}

namespace oneapi::mkl::blas::row_major {
    void imatcopy(sycl::queue &queue,
                  oneapi::mkl::transpose trans,
                  std::int64_t m,
                  std::int64_t n,
                  T alpha,
                  sycl::buffer<T, 1> &ab,
                  std::int64_t lda,
                  std::int64_t ldb);
}

Input Parameters

queue

The queue where the routine will be executed.

trans

Specifies op(AB), the transposition operation applied to the matrix AB. See Data Types for more details.

m

Number of rows for the matrix AB on input. Must be at least zero.

n

Number of columns for the matrix AB on input. Must be at least zero.

alpha

Scaling factor for the matrix transposition or copy.

ab

Buffer holding the input/output matrix AB. Must have size as follows:

	`trans` = `transpose::nontrans`	`trans` = `transpose::trans` or `trans` = `transpose::conjtrans`
Column major	Size of array `ab` must be at least max(`lda`, `ldb`) * `n`	Size of array `ab` must be at least max(`lda`, `ldb`) * max(`m`, `n`)
Row major	Size of array `ab` must be at least max(`lda`, `ldb`) * `m`	Size of array `ab` must be at least max(`lda`, `ldb`) * max(`m`, `n`)

lda

Leading dimension of the matrix AB on input. If matrices are stored using column major layout, lda must be at least m. If matrices are stored using row major layout, lda must be at least n. Must be positive.

ldb

Leading dimension of the matrix AB on output. Must be positive.

	`trans` = `transpose::nontrans`	`trans` = `transpose::trans` or `trans` = `transpose::conjtrans`
Column major	Must be at least `m`	Must be at least `n`
Row major	Must be at least `n`	Must be at least `m`

Output Parameters

ab: Output buffer, overwritten by alpha * op(AB).

imatcopy (USM Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    sycl::event imatcopy(sycl::queue &queue,
                         oneapi::mkl::transpose trans,
                         std::int64_t m,
                         std::int64_t n,
                         oneapi::mkl::value_or_pointer<T> alpha,
                         T *ab,
                         std::int64_t lda,
                         std::int64_t ldb,
                         const std::vector<sycl::event> &dependencies = {});
}

namespace oneapi::mkl::blas::row_major {
    sycl::event imatcopy(sycl::queue &queue,
                         oneapi::mkl::transpose trans,
                         std::int64_t m,
                         std::int64_t n,
                         oneapi::mkl::value_or_pointer<T> alpha,
                         T *ab,
                         std::int64_t lda,
                         std::int64_t ldb,
                         const std::vector<sycl::event> &dependencies = {});
}

Input Parameters

queue

The queue where the routine will be executed.

trans

Specifies op(AB), the transposition operation applied to the matrix AB. See Data Types for more details.

m

Number of rows for the matrix AB on input. Must be at least zero.

n

Number of columns for the matrix AB on input. Must be at least zero.

alpha

Scaling factor for the matrix transposition or copy. See Scalar Arguments for more information on the value_or_pointer data type.

ab

Pointer to input/output matrix AB. Must have size as follows:

	`trans` = `transpose::nontrans`	`trans` = `transpose::trans` or `trans` = `transpose::conjtrans`
Column major	Size of array `ab` must be at least max(`lda`, `ldb`) * `n`	Size of array `ab` must be at least max(`lda`, `ldb`) * max(`m`, `n`)
Row major	Size of array `ab` must be at least max(`lda`, `ldb`) * `m`	Size of array `ab` must be at least max(`lda`, `ldb`) * max(`m`, `n`)

lda

ldb

Leading dimension of the matrix AB on output. Must be positive.

	`trans` = `transpose::nontrans`	`trans` = `transpose::trans` or `trans` = `transpose::conjtrans`
Column major	Must be at least `m`	Must be at least `n`
Row major	Must be at least `n`	Must be at least `m`

dependencies

List of events to wait for before starting computation, if any. If omitted, defaults to no dependencies.

Output Parameters

ab: Pointer to output matrix AB overwritten by alpha * op(AB).

Return Values

Output event to wait for to ensure computation is complete.

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oneMKL - Data Parallel C++ Developer Reference

imatcopy

Description

imatcopy (Buffer Version)

imatcopy (USM Version)