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Use 4x FMA chains to sum on SIMD 128 FP64 targets. On x86 this showed about 1.4x improvement. For PPC, do a full multiply (32x32->64b), convert to DP then accumulate. This may be slightly less precise for some inputs. But is 1.5x faster than the above which is about 1.5x than the FMA above for ~2.5x speedup.
* removed private flann documentation * common tutorial images moved to doc/images * grouping issues
* Convert ImgWarp from SSE SIMD to HAL - 2.8x faster on Power (VSX) and 15% speedup on x86 * Change compile flag from CV_SIMD128 to CV_SIMD128_64F for use of v_float64x2 type * Changing WarpPerspectiveLine from class functions and dispatching to static functions. * Re-add dynamic runtime and dispatch execution. * RRestore SSE4_1 optimizations inside opt_SSE4_1 namespace
- error: variables in the local address space can only be declared in the outermost scope of a kernel function
* Wrap unsupported by IE layers as custom layers * Replace pointers to layers blobs to their shapes * Enable Faster R-CNN with IE backend on CPU
* fix 'chmod' is not recognized as an internal or external command in Windows opencv#14939 * cmake: update PCH command handling
* Adding all possible data type interactions to the perf tests since some use SIMD acceleration and others do not. * Disabling full tests by default. * Giving proper names, removing magic numbers and sanity checks of new performance tests for the integral function. * Giving proper names, making array static.
* Added mechanism to set/toggle NORMAL window to TOPMOST window. * highgui: remove unnecessary/legacy code
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#14872 from AhiyaHiya:feature/topmost_window
#15063 from dkurt:dnn_ie_ocv_layers
#15170 from sturkmen72:update_samples
#15339 from pmur:dotprod-32s-vsx
#15358 from ChipKerchner:imgwarpToHal
#15402 from ChipKerchner:normUnroll
#15424 from mshabunin:add-cmake-docs
#15433 from huihut:master
#15435 from alalek:update_version_3.4.8-pre
#15437 from devnexen:fbsd_opencl_build_fix
#15440 from everton1984:new_integral_tests
#15444 from alalek:ocl_fix_fft_kernel
Previous "Merge 3.4": #15423