omatadd

Computes a sum of two general dense matrices, with optional transposes.

Description

The omatadd routine performs an out-of-place scaled matrix addition with optional transposes in the arguments. The operation is defined as:

\[C \leftarrow \alpha * op(A) + \beta * op(B)\]

where:

op(X) is one of op(X) = X, or op(X) = X^T, or op(X) = X^H

alpha and beta are scalars,

A and B are input matrices while C is an output matrix,

C is m x n,

A is m x n if the op(A) is not transposed or n by m if it is,

and B is m x n if the op(B) is not transposed or n by m if it is.

In general, A, B, and C should not overlap in memory, with the exception of the following in-place operations:

• A and C may point to the same memory if op(A) is non-transpose and lda = ldc;

• B and C may point to the same memory if op(B) is non-transpose and ldb = ldc.

omatadd supports the following precisions:

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

omatadd (Buffer Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    void omatadd(sycl::queue &queue,
                 oneapi::mkl::transpose transa,
                 oneapi::mkl::transpose transb,
                 std::int64_t m,
                 std::int64_t n,
                 T alpha,
                 sycl::buffer<T, 1> &a,
                 std::int64_t lda,
                 T beta,
                 sycl::buffer<T, 1> &b,
                 std::int64_t ldb,
                 sycl::buffer<T, 1> &c,
                 std::int64_t ldc)
}

namespace oneapi::mkl::blas::row_major {
    void omatadd(sycl::queue &queue,
                 oneapi::mkl::transpose transa,
                 oneapi::mkl::transpose transb,
                 std::int64_t m,
                 std::int64_t n,
                 T alpha,
                 sycl::buffer<T, 1> &a,
                 std::int64_t lda,
                 T beta,
                 sycl::buffer<T, 1> &b,
                 std::int64_t ldb,
                 sycl::buffer<T, 1> &c,
                 std::int64_t ldc)
}

Input Parameters

queue

The queue where the routine should be executed.

transa

Specifies op(A), the transposition operation applied to the matrix A. See oneMKL defined datatypes for more details.

transb

Specifies op(B), the transposition operation applied to the matrix B. See oneMKL defined datatypes for more details.

m

Number of rows for the result matrix C. Must be at least zero.

n

Number of columns for the result matrix C. Must be at least zero.

alpha

Scaling factor for the matrix A.

a

Buffer holding the input matrix A.

	transa = transpose::nontrans	transa = transpose::trans or transa = transpose::conjtrans
Column major	A is m x n matrix. Size of array a must be at least lda * n	A is n x m matrix. Size of array a must be at least lda * m
Row major	A is m x n matrix. Size of array a must be at least lda * m	A is n x m matrix. Size of array a must be at least lda * n

lda

The leading dimension of the matrix A. It must be positive.

	transa = transpose::nontrans	transa = transpose::trans or transa = transpose::conjtrans
Column major	lda must be at least m.	lda must be at least n.
Row major	lda must be at least n.	lda must be at least m.

beta

Scaling factor for the matrix B.

b

Buffer holding the input matrix B. Must have size at least:

	transb = transpose::nontrans	transb = transpose::trans or transb = transpose::conjtrans
Column major	B is m x n matrix. Size of array b must be at least ldb * n	B is n x m matrix. Size of array b must be at least ldb * m
Row major	B is m x n matrix. Size of array b must be at least ldb * m	B is n x m matrix. Size of array b must be at least ldb * n

ldb

The leading dimension of the B matrix. It must be positive.

	transb = transpose::nontrans	transb = transpose::trans or transb = transpose::conjtrans
Column major	ldb must be at least m.	ldb must be at least n.
Row major	ldb must be at least n.	ldb must be at least m.

c

Buffer holding the output matrix C.

Column major	C is m x n matrix. Size of array c must be at least ldc * n
Row major	C is m x n matrix. Size of array c must be at least ldc * m

ldc

Leading dimension of the C matrices. If matrices are stored using column major layout, ldc must be at least m. If matrices are stored using row major layout, ldc must be at least n. Must be positive.

Output Parameters

c

Output buffer overwritten by alpha * op(A) + beta * op(B).

Throws

This routine shall throw the following exceptions if the associated condition is detected. An implementation may throw additional implementation-specific exception(s) in case of error conditions not covered here.

oneapi::mkl::invalid_argument

oneapi::mkl::unsupported_device

oneapi::mkl::host_bad_alloc

oneapi::mkl::device_bad_alloc

oneapi::mkl::unimplemented

omatadd (USM Version)

Syntax

namespace oneapi::mkl::blas::column_major {
    sycl::event omatadd(sycl::queue &queue,
                        oneapi::mkl::transpose transa,
                        oneapi::mkl::transpose transb,
                        std::int64_t m,
                        std::int64_t n,
                        T alpha,
                        const T *a,
                        std::int64_t lda,
                        T beta,
                        const T *b,
                        std::int64_t ldb,
                        T *c,
                        std::int64_t ldc,
                        const std::vector<sycl::event> &dependencies = {});
}

namespace oneapi::mkl::blas::row_major {
    sycl::event omatadd(sycl::queue &queue,
                        oneapi::mkl::transpose transa,
                        oneapi::mkl::transpose transb,
                        std::int64_t m,
                        std::int64_t n,
                        T alpha,
                        const T *a,
                        std::int64_t lda,
                        T beta,
                        const T *b,
                        std::int64_t ldb,
                        T *c,
                        std::int64_t ldc,
                        const std::vector<sycl::event> &dependencies = {});
}

Input Parameters

queue

The queue where the routine should be executed.

transa

Specifies op(A), the transposition operation applied to the matrix A. See oneMKL defined datatypes for more details.

transb

Specifies op(B), the transposition operation applied to the matrix B. See oneMKL defined datatypes for more details.

m

Number of rows for the result matrix C. Must be at least zero.

n

Number of columns for the result matrix C. Must be at least zero.

alpha

Scaling factor for the matrix A.

a

Array holding the input matrix A.

	transa = transpose::nontrans	transa = transpose::trans or transa = transpose::conjtrans
Column major	A is m x n matrix. Size of array a must be at least lda * n	A is n x m matrix. Size of array a must be at least lda * m
Row major	A is m x n matrix. Size of array a must be at least lda * m	A is n x m matrix. Size of array a must be at least lda * n

lda

The leading dimension of the matrix A. It must be positive.

	transa = transpose::nontrans	transa = transpose::trans or transa = transpose::conjtrans
Column major	lda must be at least m.	lda must be at least n.
Row major	lda must be at least n.	lda must be at least m.

beta

Scaling factor for the matrices B.

b

Array holding the input matrices B.

	transb = transpose::nontrans	transb = transpose::trans or transb = transpose::conjtrans
Column major	B is m x n matrix. Size of array b must be at least ldb * n	B is n x m matrix. Size of array b must be at least ldb * m
Row major	B is m x n matrix. Size of array b must be at least ldb * m	B is n x m matrix. Size of array b must be at least ldb * n

ldb

The leading dimension of the B matrix. It must be positive.

	transb = transpose::nontrans	transb = transpose::trans or transb = transpose::conjtrans
Column major	ldb must be at least m.	ldb must be at least n.
Row major	ldb must be at least n.	ldb must be at least m.

c

Array holding the output matrix C.

Column major	C is m x n matrix. Size of array c must be at least ldc * n
Row major	C is m x n matrix. Size of array c must be at least ldc * m

ldc

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

dependencies

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

Output Parameters

c

Output array, overwritten by alpha * op(A) + beta * op(B).

Return Values

Output event to wait on to ensure computation is complete.

Throws

This routine shall throw the following exceptions if the associated condition is detected. An implementation may throw additional implementation-specific exception(s) in case of error conditions not covered here.

oneapi::mkl::invalid_argument

oneapi::mkl::unsupported_device

oneapi::mkl::host_bad_alloc

oneapi::mkl::device_bad_alloc

oneapi::mkl::unimplemented

Parent topic: BLAS-like Extensions