getri_batch (Out-of-place, Buffer Strided Version)¶
Computes the batch of inverses of an LU-factored general matrices
determined by getrf_batch
(Buffer stride version) function. This routine
belongs to the oneapi::mkl::lapack
namespace.
Description¶
The routine computes the inverses A
i-1 of a general
matrices A
i. Before calling this routine, call
getrf_batch (Buffer Strided Version) function
to factorize A
i.
API¶
Syntax¶
namespace oneapi::mkl::lapack {
sycl::event getri_batch(sycl::queue &queue,
std::int64_t n,
sycl::buffer<T> &a,
std::int64_t lda,
std::int64_t stride_a,
sycl::buffer<std::int64_t> &ipiv,
std::int64_t stride_ipiv,
sycl::buffer<T> &ainv,
std::int64_t ldainv,
std::int64_t stride_ainv,
std::int64_t batch_size,
sycl::buffer<T> &scratchpad,
std::int64_t scratchpad_size)
}
This function supports the following precisions and devices:
T |
Devices supported |
---|---|
|
CPU and GPU |
|
CPU and GPU |
|
CPU and GPU |
|
CPU and GPU |
Input Parameters¶
- queue
Device queue where calculations will be performed.
- n
The order of the matrices
A
i (n
≥ 0).- a
Result of the getrf_batch (Buffer Strided Version) function
- lda
The leading dimension of
A
i (lda
≥max(1, n)
).- stride_a
The stride between the beginnings of matrices
A
i inside the batch arraya
(stride_a
≥max(1, lda * n)
).- ipiv
The array as returned by getrf_batch (Buffer Strided Version).
- stride_ipiv
The stride between the beginnings of arrays
ipiv
i inside the arrayipiv
(stride_ipiv
≥max(1, n)
).- ldainv
The leading dimension of
Ainv
i (ldainv
≥max(1, n)
).- stride_ainv
The stride between the beginnings of matrices
Ainv
i inside the batch arrayainv
(stride_ainv
≥max(1, ldainv * n)
).- batch_size
The number of problems in a batch (
batch_size
≥ 0).- scratchpad
Scratchpad memory to be used by routine for storing intermediate results.
- scratchpad_size
Size of scratchpad memory as a number of floating point elements of type
T
. Size should not be less than the value returned by the out-of-place, stride version of getri_batch_scratchpad_size (Strided Version) function.
Output Parameters¶
- ainv
Overwritten by the n-by-n matrices
A
i-1.
Exceptions¶
Exception |
Description |
---|---|
|
This exception is thrown when problems occur during calculations. You can obtain the info code of the problem using the info() method of the exception object: If If |