cblas_?gemm_compute

Syntax

void cblas_hgemm_compute (const CBLAS_LAYOUT Layout, const MKL_INT transa, const MKL_INT transb, const MKL_INT m, const MKL_INT n, const MKL_INT k, const MKL_F16 *a, const MKL_INT lda, const MKL_F16 *b, const MKL_INT ldb, const MKL_F16 beta, MKL_F16 *c, const MKL_INT ldc);

void cblas_sgemm_compute (const CBLAS_LAYOUT Layout, const MKL_INT transa, const MKL_INT transb, const MKL_INT m, const MKL_INT n, const MKL_INT k, const float *a, const MKL_INT lda, const float *b, const MKL_INT ldb, const float beta, float *c, const MKL_INT ldc);

void cblas_dgemm_compute (const CBLAS_LAYOUT Layout, const MKL_INT transa, const MKL_INT transb, const MKL_INT m, const MKL_INT n, const MKL_INT k, const double *a, const MKL_INT lda, const double *b, const MKL_INT ldb, const double beta, double *c, const MKL_INT ldc);

Include Files

• mkl.h

Description

The cblas_?gemm_compute routine is one of a set of related routines that enable use of an internal packed storage. After calling cblas_?gemm_pack call cblas_?gemm_compute to compute

C := op(A)*op(B) + beta*C,

where:

• op(X) is one of the operations op(X) = X, op(X) = X^T, or op(X) = X^H,
• beta is a scalar,
• A , B, and C are matrices:
• op(A) is an m-by-k matrix,
• op(B) is a k-by-n matrix,
• C is an m-by-n matrix.

Input Parameters

Layout

Specifies whether two-dimensional array storage is row-major (CblasRowMajor) or column-major (CblasColMajor).

transa

Specifies the form of op(A) used in the matrix multiplication, one of the CBLAS_TRANSPOSE or CBLAS_STORAGE enumerated types:

If transa = CblasNoTrans  op(A) = A.

If transa = CblasTrans  op(A) = A^T.

If transa = CblasConjTrans  op(A) = A^H.

If transa = CblasPacked the matrix in array a is packed and lda is ignored.

transb

Specifies the form of op(B) used in the matrix multiplication, one of the CBLAS_TRANSPOSE or CBLAS_STORAGE enumerated types:

If transb = CblasNoTrans  op(B) = B.

If transb = CblasTrans op(B) = B^T.

If transb = CblasConjTrans op(B) = B^H.

If transb = CblasPacked the matrix in array b is packed and ldb is ignored.

m

Specifies the number of rows of the matrix op(A) and of the matrix C. The value of m must be at least zero.

n

Specifies the number of columns of the matrix op(B) and the number of columns of the matrix C. The value of n must be at least zero.

k

Specifies the number of columns of the matrix op(A) and the number of rows of the matrix op(B). The value of k must be at least zero.

a

Array:

	transa = CblasNoTrans	transa = CblasTrans or transa = CblasConjTrans	transa = CblasPacked
Layout = CblasColMajor	Size lda*k. Before entry, the leading m-by-k part of the array a must contain the matrix A.	Size lda*m. Before entry, the leading k-by-m part of the array a must contain the matrix A.	Stored in internal packed format.
Layout = CblasRowMajor	Size lda*m. Before entry, the leading k-by-m part of the array a must contain the matrix A.	Size lda*k. Before entry, the leading m-by-k part of the array a must contain the matrix A.	Stored in internal packed format.

lda

Specifies the leading dimension of a as declared in the calling (sub)program.

	transa = CblasNoTrans	transa = CblasTrans or transa = CblasConjTrans	transa = CblasPacked
Layout = CblasColMajor	lda must be at least max(1, m).	lda must be at least max(1, k).	lda is ignored.
Layout = CblasRowMajor	lda must be at least max(1, k).	lda must be at least max(1, m).	lda is ignored.

b

Array:

	transb = CblasNoTrans	transb = CblasTrans or transb = CblasConjTrans	transb = CblasPacked
Layout = CblasColMajor	Size ldb*n. Before entry, the leading k-by-n part of the array b must contain the matrix B.	Size ldb*k. Before entry, the leading n-by-k part of the array b must contain the matrix B.	Stored in internal packed format.
Layout = CblasRowMajor	Size ldb*k. Before entry, the leading n-by-k part of the array b must contain the matrix B.	Size ldb*n. Before entry, the leading k-by-n part of the array b must contain the matrix B.	Stored in internal packed format.

ldb

Specifies the leading dimension of b as declared in the calling (sub)program.

	transb = CblasNoTrans	transb = CblasTransor transb = CblasConjTrans	transb = CblasPacked
Layout = CblasColMajor	ldb must be at least max(1, k).	ldb must be at least max(1, n).	ldb is ignored.
Layout = CblasRowMajor	ldb must be at least max(1, n).	ldb must be at least max(1, k).	ldb is ignored.

beta

Specifies the scalar beta. When beta is equal to zero, then c need not be set on input.

c

Array:

Layout = CblasColMajor	Size ldc*n. Before entry, the leading m-by-n part of the array c must contain the matrix C, except when beta is equal to zero, in which case c need not be set on entry.
Layout = CblasRowMajor	Size ldc*m. Before entry, the leading n-by-m part of the array c must contain the matrix C, except when beta is equal to zero, in which case c need not be set on entry.

ldc

Specifies the leading dimension of c as declared in the calling (sub)program.

Layout = CblasColMajor	ldc must be at least max(1, m).
Layout = CblasRowMajor	ldc must be at least max(1, n).

Output Parameters