Visible to Intel only — GUID: GUID-606DF015-535C-4E1B-BCB9-AEA184BCB6F8
Visible to Intel only — GUID: GUID-606DF015-535C-4E1B-BCB9-AEA184BCB6F8
gerc
Computes a rank-1 update (conjugated) of a general complex matrix.
Description
The gerc routines compute a scalar-vector-vector product and add the result to a general matrix. The operation is defined as:
where:
alpha is a scalar
A is m x n matrix
x is a vector of length m
y is vector of length n
gerc supports the following precisions:
T |
---|
std::complex<float> |
std::complex<double> |
gerc (Buffer Version)
Syntax
namespace oneapi::mkl::blas::column_major { void gerc(sycl::queue &queue, std::int64_t m, std::int64_t n, T alpha, sycl::buffer<T,1> &x, std::int64_t incx, sycl::buffer<T,1> &y, std::int64_t incy, sycl::buffer<T,1> &a, std::int64_t lda) }
namespace oneapi::mkl::blas::row_major { void gerc(sycl::queue &queue, std::int64_t m, std::int64_t n, T alpha, sycl::buffer<T,1> &x, std::int64_t incx, sycl::buffer<T,1> &y, std::int64_t incy, sycl::buffer<T,1> &a, std::int64_t lda) }
Input Parameters
- queue
-
The queue where the routine should be executed.
- m
-
Number of rows of matrix A. Must be at least zero.
- n
-
Number of columns of matrix A. Must be at least zero.
- alpha
-
Scaling factor for the matrix-vector product.
- x
-
Buffer holding input vector x. Size of the buffer must be at least (1 + (m - 1)*abs(incx)). See Matrix Storage for more details.
- incx
-
Stride of vector x. Must not be zero.
- y
-
Buffer holding input/output vector y. Size of the buffer must be at least (1 + (n - 1)*abs(incy)). See Matrix Storage for more details.
- incy
-
Stride of vector y. Must not be zero.
- a
-
Buffer holding input matrix A. Size of the buffer must be at least lda * n if column major layout is used, or at least lda * m if row major layout is used. See Matrix Storage for more details.
- lda
-
Leading dimension of matrix A. Must be positive and at least m if column major layout is used or at least n if row major layout is used.
Output Parameters
- a
-
Buffer holding updated matrix A.
gerc (USM Version)
Syntax
namespace oneapi::mkl::blas::column_major { sycl::event gerc(sycl::queue &queue, std::int64_t m, std::int64_t n, T alpha, const T *x, std::int64_t incx, const T *y, std::int64_t incy, T *a, std::int64_t lda, const std::vector<sycl::event> &dependencies = {}) }
namespace oneapi::mkl::blas::row_major { sycl::event gerc(sycl::queue &queue, std::int64_t m, std::int64_t n, T alpha, const T *x, std::int64_t incx, const T *y, std::int64_t incy, T *a, std::int64_t lda, const std::vector<sycl::event> &dependencies = {}) }
Input Parameters
- queue
-
The queue where the routine should be executed.
- m
-
Number of rows of matrix A. Must be at least zero.
- n
-
Number of columns of matrix A. Must be at least zero.
- alpha
-
Scaling factor for the matrix-vector product.
- x
-
Pointer to input vector x. Size of the array holding input vector x must be at least (1 + (m - 1)*abs(incx)). See Matrix Storage for more details.
- incx
-
Stride of vector x.
- y
-
Pointer to input/output vector y. Size of the array holding input/output vector y must be at least (1 + (n - 1)*abs(incy)). See Matrix Storage for more details.
- incy
-
Stride of vector y.
- a
-
Pointer to input matrix A. Size of the array must be at least lda * n if column major layout is used, or at least lda * m if row major layout is used.
- lda
-
Leading dimension of matrix A. Must be positive and at least m if column major layout is used or at least n if row major layout is used.
- dependencies
-
List of events to wait for before starting computation, if any. If omitted, defaults to no dependencies.
Output Parameters
- a
-
Pointer to updated matrix A.
Return Values
Output event to wait on to ensure computation is complete.