Saturating integer arithmetic

[Ola Fosheim Grøstad via Digitalmars-d]

On Monday, 27 June 2016 at 04:23:10 UTC, Ola Fosheim Grøstad 
wrote:
> https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=adds_epi

Or in the context of 8 bit colour vectors:

https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=adds_epu8