Description

API

namespace oneapi::mkl::lapack {
  template<typename T>
  std::int64_t gesvd_scratchpad_size(cl::sycl::queue &queue,
  mkl::jobsvd jobu,
  mkl::jobsvd jobvt,
  std::int64_t m,
  std::int64_t n,
  std::int64_t lda,
  std::int64_t ldu,
  std::int64_t ldvt)
}

queue

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

jobu

Must be

jobsvd::vectors

,

jobsvd::somevec

,

jobsvd::vectorsina

, or

jobsvd::novec

. Specifies options for computing all or part of the matrix

U

.

If

jobu = jobsvd::vectors

, all

m

columns of

U

are returned in the array u;

if

jobu = jobsvd::somevec

, the first

min(m, n)

columns of

U

(the left singular vectors) are returned in the array u;

if

jobu = jobsvd::vectorsina

, the first

min(m, n)

columns of

U

(the left singular vectors) are overwritten on the array a;

if

jobu = jobsvd::novec

, no columns of

U

(no left singular vectors) are computed.

jobvt

Must be

jobsvd::vectors, jobsvd::somevec

,

jobsvd::vectorsina

, or

jobsvd::novec

. Specifies options for computing all or part of the matrix

VT/VH

.

If

jobvt = jobsvd::vectors

, all n columns of

VT/VH

are returned in the array vt;

if

jobvt = jobsvd::somevec

, the first

min(m, n)

columns of

VT/VH

(the left singular vectors) are returned in the array vt;

if

jobvt = jobsvd::vectorsina

, the first

min(m, n)

columns of

VT/VH

(the left singular vectors) are overwritten on the array a;

if

jobvt = jobsvd::novec

, no columns of

VT/VH

(no left singular vectors) are computed.

jobvt and jobu cannot both be

job::overwritevec

.

m

The number of rows in the matrix

A

(

0≤m

).

n

The number of columns in the matrix

A

(

0≤n

).

lda

The leading dimension of a.

ldu

The leading dimension of u.

ldvt

The leading dimension of vt.