Francesco Petrogalli 6ee23c9b85 Merge pull request #19486 from fpetrogalli:dotprod_fast-3.4 ... * [hal][neon] Optimize the v_dotprod_fast intrinsics for aarch64. On Armv8 in AArch64 execution mode, we can skip the sequence v<op>_<ty>(vget_high_<ty>(x), vget_high_<ty>(y)) in favour of v<op>_high_<ty>(x, y) This has better changes for recent compilers to use less data movement operations and better register allocation. See for example: https://godbolt.org/z/bPq7vd * [hal][neon] Fix build failure on armv7. * [hal][neon] Address review comments in PR. PR: https://github.com/opencv/opencv/pull/19486 * [hal][neon] Define macro to check for the AArch64 execution state of Armv8. * [hal][neon] Fix macro definition for AArch64. The fix is needed to prevent warnings when building for Armv7.		2021-02-11 13:24:09 +00:00
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opencv2	Merge pull request #19486 from fpetrogalli:dotprod_fast-3.4	2021-02-11 13:24:09 +00:00