[x265] [arm64] port costCoeffNxN

[Pop, Sebastian]

Hi,


please find attached a patch that ports costCoeffNxN to arm64.

The patch speeds up costCoeffNxN by 1.4x on Graviton2:



I have also attached a patch to fix the output of ./x265 -V that used to print 32bit instead of 64bit on arm64.


Sebastian


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