trmv#
Computes a sparse matrix-dense vector product over upper or lower triangular matrix parts.
Description and Assumptions
Refer to Supported Types for a
list of supported <fp> and <intType>.
The oneapi::mkl::sparse::trmv routine computes a sparse matrix-dense vector
product over a triangular part defined as
where: \(alpha\) and \(beta\) are scalars, \(x\) and \(y\) are dense vectors, A is a sparse matrix.
trmv (Buffer version)#
Syntax
namespace oneapi::mkl::sparse {
void trmv (sycl::queue &queue,
oneapi::mkl::uplo uplo_val
oneapi::mkl::transpose transpose_val,
oneapi::mkl::diag diag_val
const fp alpha,
oneapi::mkl::sparse::matrix_handle_t A_handle,
sycl::buffer<fp, 1> &x,
const fp beta,
sycl::buffer<fp, 1> &y);
}
Input Parameters
- queue
Specifies the SYCL command queue which will be used for SYCL kernels execution.
- uplo_val
Specifies which part is to be processed. The possible options are described in uplo enum class.
- transpose_val
Specifies operation
op()on input matrix. The possible options are described in transpose enum class.- diag_val
Specifies if the diagonal is unit or not. The possible options are described in diag enum class.
- alpha
Specifies the scalar \(\alpha\).
- A_handle
Handle to object containing sparse matrix \(A\). Created using the oneapi::mkl::sparse::set_csr_data routine.
- x
SYCL memory object containing an array of size at least equal to the number of columns of matrix \(\text{op}(A)\).
- beta
Specifies the scalar \(\beta\).
- y
SYCL memory object containing an array of size at least equal to the number of rows of matrix \(\text{op}(A)\).
Output Parameters
- y
Overwritten by the updated vector
y.
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.
trmv (USM version)#
Syntax
namespace oneapi::mkl::sparse {
sycl::event trmv (sycl::queue &queue,
oneapi::mkl::uplo uplo_val
oneapi::mkl::transpose transpose_val,
oneapi::mkl::diag diag_val
const fp alpha,
oneapi::mkl::sparse::matrix_handle_t A_handle,
const fp *x,
const fp beta,
fp *y
const std::vector<sycl::event> &dependencies = {});
}
Input Parameters
- queue
Specifies the SYCL command queue which will be used for SYCL kernels execution.
- uplo_val
Specifies which part is to be processed. The possible options are described in uplo enum class.
- transpose_val
Specifies operation
op()on input matrix. The possible options are described in transpose enum class.- diag_val
Specifies if the diagonal is unit or not. The possible options are described in diag enum class.
- alpha
Specifies the scalar \(\alpha\).
- A_handle
Handle to object containing sparse matrix \(A\). Created using the oneapi::mkl::sparse::set_csr_data routine.
- x
Device-accessible USM object containing an array of size at least equal to the number of columns of matrix \(\text{op}(A)\).
- beta
Specifies the scalar \(\beta\).
- y
Device-accessible USM object containing an array of size at least equal to the number of rows of matrix \(\text{op}(A)\).
- dependencies
List of events that oneapi::mkl::sparse::trmv routine depends on. If omitted, defaults to no dependencies.
Output Parameters
- y
Overwritten by the updated vector
y.
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.
Return Values
Output event that can be waited upon or added as a dependency for the completion of trmv routine.
Parent topic: Sparse BLAS