Developer Reference

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syevd_scratchpad_size

Computes size of scratchpad memory required for
syevd
(USM Version) function. This routine belongs to the
oneapi::mkl::lapack
namespace.

Description

Computes the number of elements of type
T
the scratchpad memory to be passed to the
syevd
(buffer or USM version) function should be able to hold.

API

Syntax
namespace oneapi::mkl::lapack { template<typename T> std::int64_t syevd_scratchpad_size(cl::sycl::queue &queue, mkl::job jobz, mkl::uplo uplo, std::int64_t n, std::int64_t lda) }
Input Parameters
queue
Device queue where calculations by the syevd (buffer or USM version) function will be performed.
jobz
Must be
job::novec
or
job::vec
.
If
jobz = job::novec
, then only eigenvalues are computed.
If
jobz = job::vec
, then eigenvalues and eigenvectors are computed.
uplo
Must be
uplo::upper
or
uplo::lower
.
If
uplo = job::upper
, a stores the upper triangular part of
A
.
If
uplo = job::lower
, a stores the lower triangular part of
A
.
n
The order of the matrix
A
(
0≤n
).
lda
The leading dimension of a. Must be at least
max(1,n)
.
Exceptions
Exception
Description
mkl::lapack::exception
This exception is thrown when an incorrect argument value is supplied. You can determine the position of the incorrect argument by the info() method of the exception object.
Exceptions
The number of elements of type
T
the scratchpad memory to be passed to the
syevd
(buffer or USM version) function should be able to hold.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.