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Visible to Intel only — GUID: GUID-A1DF1868-DB14-40FF-BF41-F5A6836588DB
Visible to Intel only — GUID: GUID-A1DF1868-DB14-40FF-BF41-F5A6836588DB
sygvd_scratchpad_size
Computes size of scratchpad memory required for sygvd (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 sygvd (buffer or USM version) function must be able to hold.
API
Syntax
namespace oneapi::mkl::lapack { template<typename T> int64_t sygvd_scratchpad_size(sycl::queue &queue, int64_t itype, mkl::job jobz, mkl::uplo uplo, int64_t n, int64_t lda, int64_t ldb) }
Input Parameters
- queue
-
Device queue where calculations by the sygvd (buffer or USM version) function will be performed.
- itype
-
Must be 1 or 2 or 3. Specifies the problem type to be solved:
if itype= 1, the problem type is A*x = lambda*B*x;
if itype= 2, the problem type is A*B*x = lambda*x;
if itype= 3, the problem type is B*A*x = lambda*x.
- 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 = uplo::upper, a and b store the upper triangular part of A and B.
If uplo = uplo::lower, a and b stores the lower triangular part of A and B.
- n
-
The order of the matrices A and B (0 ≤ n).
- lda
-
The leading dimension of a; at least max(1,n).
- ldb
-
The leading dimension of b; 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 sygvd (buffer or USM version) function must be able to hold.