ref: e543475d593ebc2f27c05ff8ff467e19b66c11ae
parent: 16778617b8af13ed9b54bcbeeb311ec94552ad02
author: lieff <lieff@users.noreply.github.com>
date: Sat Jan 27 11:40:25 EST 2018
use 32bit for coverage (no generic code stripped) and 64bit for PSNR test