potrs_scratchpad_size

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

Syntax

namespace oneapi::mkl::lapack {
   template<typename T>
   std::int64_t potrs_scratchpad_size(
   cl::sycl::queue &queue,
   mkl::uplo uplo,
   std::int64_t n,
   std::int64_t nrhs,
   std::int64_t lda,
   std::int64_t ldb)
}

.. rubric:: Description
   :class: sectiontitle

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

.. rubric:: Input Parameters
   :class: sectiontitle

queue
   Device queue where calculations by the potrs (buffer or USM
   version) function will be performed.


uplo
   Indicates how the input matrix has been factored:


   If uplo=\ ``mkl::uplo::upper``, the upper triangle ``U`` of
   ``A`` is stored, where ``A`` = ``U``\ :sup:`T`\ \*\ ``U`` for
   real data, ``A`` = ``U``\ :sup:`H`\ \*\ ``U`` for complex data.


   If uplo=\ ``mkl::uplo::lower``, the upper triangle ``L`` of
   ``A`` is stored, where ``A`` = ``L``\ \*\ ``L``\ :sup:`T` for
   real data, ``A`` = ``L``\ \*\ ``L``\ :sup:`H` for complex data.


n
   The order of matrix ``A`` (0≤n).


nrhs
   The number of right-hand sides (0≤nrhs).


lda
   The leading dimension of A.


ldb
   The leading dimension of B.


Exceptions


.. list-table::

   * -     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.

Return Values

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