Pratham Kumar 08f84c19c2 Merge pull request #30080 from pratham-mcw:invert_opt_5.x ...

core: add ARMPL HAL backend for cv::invert(DECOMP_LU) - #30080

## Summary

- Follow-up to #[30035](https://github.com/opencv/opencv/pull/30035) to apply the same `cv::invert` optimization to the 5.x branch.
- Adds an ARM Performance Library (ArmPL) HAL backend for cv::invert under DECOMP_LU (cv_hal_LU32f / cv_hal_LU64f), replacing OpenCV's default LU decomposition path with ArmPL's LAPACKE_sgesv / LAPACKE_dgesv for float and double matrices on AArch64.

## Changes
**hal/armpl/include/armpl_hal_core.hpp:**
- Declare armpl_hal_LU32f / armpl_hal_LU64f and register them as cv_hal_LU32f / cv_hal_LU64f.

**hal/armpl/src/armpl_hal_core.cpp:**

- Add armpl_lu() function (works for both float and double), that does the LU decomposition of the matrix:
  - If a right-hand side b is given, then LAPACKE_sgesv/dgesv is called.
  - If no right-hand side is given, it only factorizes the matrix using LAPACKE_sgetrf/dgetrf
- Fall back to OpenCV's default (non-HAL) implementation for small matrices (m < 100).

2026-09-29 08:53:10 +03:00

..

armpl_hal_core.hpp

Merge pull request #30080 from pratham-mcw:invert_opt_5.x

2026-09-29 08:53:10 +03:00