Contents

hetrd_scratchpad_size

Computes size of scratchpad memory required for hetrd (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 hetrd (buffer or USM version) function should be able to hold.

API

Syntax

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

Input Parameters

queue

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

uplo

Must be uplo::upper or uplo::lower.

If uplo = uplo::upper, a stores the upper triangular part of A.

If uplo = uplo::lower, a stores the lower triangular part of A.

n

The order of the matrices A(0≤n).

lda

The leading dimension of a; 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.

Return Values

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

hetrd (USM Version) hetrf