Paul E. Murphy 33fb253a66 core: vectorize dotProd_32s ... 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.		2019-08-20 15:28:36 -05:00
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opencv2	core: vectorize dotProd_32s	2019-08-20 15:28:36 -05:00