aarch64: v4.4s [ ............./ ............./ .........../ .......... ] v4.2d [ ............................/ ........................] arm7/neon: s0..s64 d0..d32 q0..q16 q0: [ s0 / s1 / s2 / s3 ] : [ d0 / d1 ] q1: [ s4 / s5 / s6 / s7 ]