trtri_scratchpad_size#

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

Description#

This routine computes the number of elements of type T the scratchpad memory to be passed to the trtri (USM version) function must be able to hold.

API#

Syntax#

 namespace oneapi::mkl::lapack {
   template<typename T>
   int64_t trtri_scratchpad_size(sycl::queue &queue,
   mkl::uplo uplo,
   mkl::diag diag,
   int64_t n,
   int64_t lda)
}

Input Parameters#

queue

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

uplo

Indicates whether A is upper or lower triangular:

If uplo = uplo::upper, then A is upper triangular.

If uplo = uplo::lower, then A is lower triangular.

diag

If diag = diag::nonunit, then A is not a unit triangular matrix.

If diag = diag::unit, then A is unit triangular: diagonal elements of A are assumed to be 1 and not referenced in the array a.

n

The order of the matrix A (n 0).

lda

The leading dimension of a; lda 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.

Return Values#

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