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 {
void getri_batch(sycl::queue &queue,
int64_t n,
sycl::buffer<T> &a,
int64_t lda,
int64_t stride_a,
sycl::buffer<int64_t> &ipiv,
int64_t stride_ipiv,
sycl::buffer<T> &ainv,
int64_t ldainv,
int64_t stride_ainv,
int64_t batch_size,
sycl::buffer<T> &scratchpad,
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
Ai (n≥ 0).- a
Result of the getrf_batch (Buffer Strided Version) function
- lda
The leading dimension of
Ai (lda≥max(1, n)).- stride_a
The stride between the beginnings of matrices
Ai 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
ipivi inside the arrayipiv(stride_ipiv≥max(1, n)).- ldainv
The leading dimension of
Ainvi (ldainv≥max(1, n)).- stride_ainv
The stride between the beginnings of matrices
Ainvi 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
Ai-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 |