Change-Id: I07f77a63aa98087626e45c4e87aa5dcafc0b0b07 (cherry picked from commit d0f237702745c4bfc0297d24f9465f960fb988ed)
This is based on the 64-bit ssse3 quantizer. 1.1x speedup for screen content at speed 7. Change-Id: I57d15415ef97c49165954bbe3daaaf9318e37448