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Visible to Intel only — GUID: GUID-D68B62C5-7E30-4039-BB5B-FF54CF27452F
Visible to Intel only — GUID: GUID-D68B62C5-7E30-4039-BB5B-FF54CF27452F
ungbr_scratchpad_size
Computes size of scratchpad memory required for ungbr (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 ungbr (buffer or USM version) function must be able to hold.
API
Syntax
namespace oneapi::mkl::lapack { template<typename T> std::int64_t ungbr_scratchpad_size(sycl::queue &queue, mkl::generate gen, std::int64_t m, std::int64_t n, std::int64_t k, std::int64_t lda) }
Input Parameters
- queue
-
Device queue where calculations by the ungbr (buffer or USM version) function will be performed.
- gen
-
Must be generate::q or generate::p.
If gen= generate::q, the routine generates the matrix Q.
If gen= generate::p, the routine generates the matrix PT.
- m
-
The number of rows in the matrix Q or PT to be returned (0 ≤ m).
If gen= generate::q, m ≥ n ≥ min(m, k).
If gen= generate::p, n ≥ m ≥ min(n, k).
- n
-
The number of rows in the matrix Q or PT to be returned (0 ≤ n). See m for constraints.
- k
-
If gen= generate::q, the number of columns in the original m-by-k matrix reduced by gebrd (USM Version).
If gen= generate::p, the number of rows in the original k-by-n matrix reduced by gebrd (USM Version).
- lda
-
The leading dimension of a.
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 ungbr (buffer or USM version) function must be able to hold.