On i7-6700:
Predictor    ssse3 v. C
4x4          ~1.3x
4x8          ~1.9x
8x4          ~2.3x
8x8          ~3.4x
8x16         ~4.1x
16x8         ~4.6x
16x16        ~5.2x
16x32        ~5.6x
32x16        ~4.2x
32x32        ~4.7x

Change-Id: Ic12383cf9d4446361d6355eb8a480a3c7602060e