SymmRowSmallVec_8u32s [1, 2, 1]
NEON speedup: 4.1
Auto-vect speedup: 2.25
SymmRowSmallVec_8u32s 1x3 general
NEON speedup: 2.56x
Auto-vect speedup: 1.26x

Test kernel: [1, 3, 1]
SymmRowSmallVec_8u32s 1x5 general
NEON speedup: 3.86x
Auto-vect speedup: 1.67x

Test kernel: [0.0708, 0.2445, 0.3694, 0.2445, 0.0708]
SymmRowSmallVec_8u32s [-1, 0, 1]
NEON speedup: 1.84x
Auto-vect speedup: 1.2x
SymmRowSmallVec_8u32s 1x3 asymmetric
NEON speedup: 1.95x
Auto-vect speedup: 1.17x

Test kernel: [-2, 0, 2]
SymmRowSmallVec_8u32s 1x5 asymm
NEON speedup: 3.14x
Auto-vect speedup: 1.6x

Test kernel: [-5, -2, 0, 2, 5]
SymmColumnVec_32s8u
NEON speedup: 1.96x
Auto-vect speedup: 1x

Test kernel: [0.0708, 0.2445, 0.3694, 0.2445, 0.0708]
SymmColumnVec_32s8u asymm
NEON speedup: 2.95x
Auto-vect speedup: 1x

Test kernel: [-0.9432, -1.1528, 0, 1.1528, 0.9432]
SymmColumnSmallVec_32s16s [1, 2, 1]
NEON speedup: 2.66x
Auto-vect speedup: 1x
SymmColumnSmallVec_32s16s [1, -2, 1]
NEON speedup: 2.75x
Auto-vect speedup: 1.01x
SymmColumnSmallVec_32s16s [3, 10, 3] Scharr
NEON speedup: 2.04x
Auto-vect speedup: 1x
SymmColumnSmallVec_32s16s 3x1
NEON speedup: 1.75x
Auto-vect speedup: 1x
SymmColumnSmallVec_32s16s [-1, 0, 1]
NEON speedup: 3.27x
Auto-vect speedup: 1.01x
SymmColumnSmallVec_32s16s 3x1 asymm
NEON speedup: 2.12x
Auto-vect speedup: 1.01x

Test kernel: [-2, 0, 2]
SymmColumnVec_32f16s
NEON speedup: 8.64x
Auto-vect speedup: 1x

Test kernel: [0.1, 0.2408, 0.3184, 0.2408, 0.1]
SymmColumnVec_32f16s asymm
NEON speedup: 9.46x
Auto-vect speedup: 1x

Test kernel: [-0.9432, -1.1528, 0, 1.1528, 0.9432]
SymmRowSmallVec_32f 1x5 
NEON speedup: 2.36x
Auto-vect speedup: 2.36x

Test kernel: [0.1, 0.2408, 0.3184, 0.2408, 0.1]
SymmRowSmallVec_32f 1x5 asymm
NEON speedup: 2.31x
Auto-vect speedup: 2.26x

Test kernel: [-0.9432, -1.1528, 0, 1.1528, 0.9432]
Change gaussianBlur5x5 perf test epsilon
Set it 1 instead of 0.001, as is already done in gaussianBlur3x3. That
will allow integer destination matrices that are not exactly the same,
but very close to the expected result, to pass the test.
Change DescriptorExtractor_ORB regression test
to compensate for neon ieee754 non-compliancy.
Also changed the comparison between max valid and calculated distance to
make the error message more accurate (in case curMaxDist == maxDist)