[EXTERNAL] Re: [Patch 1/5] rs6000, Add 128-bit sign extension support

Segher Boessenkool segher@kernel.crashing.org
Tue Aug 18 21:50:26 GMT 2020


On Thu, Aug 13, 2020 at 06:53:56PM -0500, will schmidt wrote:
> On Thu, 2020-08-13 at 17:55 -0500, Segher Boessenkool wrote:
> > > As long as there are no issues defining the builtins for 3.0 here.
> > > AFAIK they are not documented in ISA 3.0.  This is a happy accident
> > > that these ISA 3.1 builtins can be implemented with existing
> > > support.
> > 
> > There are *no* builtins defined in the ISA!  The insns are just ISA
> > 3.0
> > instructions.
> 
> Ok. 
> 
> So then maybe just "Sign extend builtins" and leave off the ISA
> reference all together.   

Sure.  Or you can say "builtins for the instructions introduced in
Power ISA 3.1" or such.

If we ever get the builtins documentation updated quickly (and updated),
it should go on https://gcc.gnu.org/readings.html , and live will be
good.


Segher


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