abs insn with QI and HI mode

[Robert Dewar]

Richard Kenner wrote:
>> Will gcc add the optimization support in the future (method 1)? 
> 
> Since GCC is a volunteer project, the answer for any sort of question
> like that is "if somebody writes it, it'll exist and if they don't, it
> won't".  There's no good way to predict what projects people will find
> interesting.

Unless of course you hire someone to do the work for you, or do it
yourself!