Terry Lambert <[EMAIL PROTECTED]> wrote:
> Thomas David Rivers wrote:
> > Well - it's not counter-intuitive on many machines... For example,
> > on the IBM mainframe - there is an instruction to load a character
> > into a register - but not one that loads *and* sign-extends. So,
> > you can get much better code if characters are unsigned by default.
>
> Sounds like time to get out the wire wrap tools... and fix the
> hardware, not the software.
Ha! That may not be a bad idea :-)
>
> > So in our C/C++ compilers for the mainframe, the default is
> > unsigned as well.
> >
> > I wonder if the AIX people were looking for mainframe
> > compatibility in this decision, or was it motivated
> > by the PowerPC instruction set? Does anyone know what
> > the Mac default is (since they are PowerPC based as well?)
>
> RS/6000's didn't used to use PPC processors at all; so it's
> probably intentional software compatability.
I'm confused then - the one we have here seems to. There
was a version of something very RS/6000-like that didn't,
but I thought RS/6000s did...
- Dave Rivers -
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