title: SIMD Registers in ARM processor
body: <p>My question is about ARM NEON.</p>
  <p>First question is about the register's size.
  I'd like to know Apple A6's and Cortex A15's actual SIMD register size.</p>
  <p>Second question is about the SIMD instruction's cycle.
  I assume that lot of ARM processor's NEON register is 64bit.</p>
  <p>The manual states: &quot;As dual view, it's 128 bit wide&quot;.
  Does this mean that even if I use 4 x 32bit value at 2 of 64 bit NEON registers, It'll be processed at one cycle?</p>
  <p>I'd also like to know cycle count differences between 128 bit NEON and 64 bit NEON.</p>