ungqr_batch_scratchpad_size (Group Version)¶
Computes size of scratchpad memory required for ungqr_batch (Group
Version) function. This routine belongs to the
oneapi::mkl::lapack
namespace.
Syntax
namespace oneapi::mkl::lapack {
std::int64_t ungqr_batch_scratchpad_size(cl::sycl::queue &queue, std::int64_t *m, std::int64_t *n, std::int64_t *k, std::int64_t *lda, std::int64_t group_count, std::int64_t *group_sizes)
}
Function supports the following precisions and devices.
T |
Devices supported |
---|---|
|
Host, CPU, and GPU |
|
Host, CPU, and GPU |
Description
Computes the number of elements of type T the scratchpad memory to be passed to the ungqr_batch (Group Version) function should be able to hold.
Input Parameters
- queue
Device queue where calculations will be performed.
- m
Array of
group_count
parametersm
g as previously supplied to ungqr_batch (Group Version).- n
Array of
group_count
parametersn
g as previously supplied to ungqr_batch (Group Version).- k
Array of
group_count
parametersk
g as previously supplied to ungqr_batch (Group Version).The number of elementary reflectors whose product defines the matrices
Q
i (0 ≤k
g≤n
g).- lda
The leading dimension of
A
i as previously supplied to ungqr_batch (Group Version).- group_count
Specifies the number of groups of parameters. Must be at least 0.
- group_sizes
Array of
group_count
integers. Array element with indexg
specifies the number of problems to solve for each of the groups of parametersg
. So the total number of problems to solve,batch_size
, is a sum of all parameter group sizes.
Exceptions
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 ungqr_batch (Group Version) function should be able to hold.