[x265] [arm64] port count_nonzero, blkfill, and copy_{ss,sp,ps}

[Pop, Sebastian]

Hi,

the attached patch ports to arm64 the following kernels:

count_nonzero[4x4]      19.23x   2.95            56.77
count_nonzero[8x8]      32.07x   7.11            228.15
count_nonzero[16x16]    35.16x   26.09           917.23
count_nonzero[32x32]    37.31x   98.07           3658.49

          blkfill[4x4]  31.39x   3.72            116.84
          blkfill[8x8]  85.97x   5.78            497.26
        blkfill[16x16]  102.63x 16.28           1670.56
        blkfill[32x32]  100.07x 62.89           6293.62

        copy_ss[  4x4]  16.87x   6.21            104.78
        copy_sp[  4x4]  16.21x   6.34            102.69
        copy_ps[  4x4]  18.06x   5.91            106.69
        copy_ss[  8x8]  51.50x   8.30            427.52
        copy_sp[  8x8]  43.34x   9.32            403.79
        copy_ps[  8x8]  49.00x   8.50            416.36
[i420] copy_ss[  4x4]  15.40x   6.62            101.98
[i420] copy_ps[  4x4]  16.50x   6.26            103.28
[i420] copy_sp[  4x4]  14.14x   6.82            96.48
[i422] copy_ss[  4x8]  25.79x   8.28            213.57
[i422] copy_ps[  4x8]  24.74x   8.62            213.35
[i422] copy_sp[  4x8]  22.01x   9.27            204.03
        copy_ss[16x16]  82.20x   19.79           1626.69
        copy_sp[16x16]  85.13x   18.78           1599.19
        copy_ps[16x16]  72.51x   22.28           1615.58
[i420] copy_ss[  8x8]  49.16x   8.49            417.24
[i420] copy_ps[  8x8]  46.52x   8.71            405.34
[i420] copy_sp[  8x8]  42.68x   9.47            404.13
[i422] copy_ss[ 8x16]  56.55x   14.98           847.42
[i422] copy_ps[ 8x16]  57.71x   15.12           872.39
[i422] copy_sp[ 8x16]  49.76x   16.83           837.44
        copy_ss[32x32]  98.60x   67.47           6652.77
        copy_sp[32x32]  96.31x   65.07           6266.88
        copy_ps[32x32]  77.71x   81.02           6295.59
[i420] copy_ss[16x16]  83.93x   20.52           1722.55
[i420] copy_ps[16x16]  72.66x   22.13           1608.30
[i420] copy_sp[16x16]  85.67x   18.73           1604.77
[i422] copy_ss[16x32]  91.45x   36.56           3343.09
[i422] copy_ps[16x32]  75.73x   42.40           3211.16
[i422] copy_sp[16x32]  91.93x   34.32           3154.89
        copy_ss[64x64]  104.11x          254.52          26498.82
        copy_sp[64x64]  98.81x   252.38          24937.40
        copy_ps[64x64]  80.97x   308.55          24983.04
[i420] copy_ss[32x32]  99.49x   67.40           6706.31
[i420] copy_ps[32x32]  76.50x   81.51           6235.63
[i420] copy_sp[32x32]  97.43x   65.84           6414.64
[i422] copy_ss[32x64]  102.57x          129.82          13315.36
[i422] copy_ps[32x64]  78.95x   159.47          12590.31
[i422] copy_sp[32x64]  99.54x   128.29          12769.10
         copy_cnt[4x4]  13.91x   7.48            104.10
         copy_cnt[8x8]  31.01x   12.69           393.40
       copy_cnt[16x16]  42.88x   36.23           1553.66
       copy_cnt[32x32]  47.43x   129.19          6127.58

Ok to commit?

Thanks,
Sebastian

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