[RFC] Type of long double on ColdFire

[Richard Henderson]

On Thu, Dec 08, 2005 at 04:05:46PM +0000, Paul Brook wrote:
> 1) Make long double == double. This is what Arm does, amongst others. This 
> pretty much just works and should reduce the amount of support code required.
> Anyone wanting more than IEEE double precision has to use a third party 
> bugnum/MP/quad library of which there are several, but no standard ABI.

This would be ok, I guess.

> 2) Choose a sensible format for long double. The obvious candidate is a 
> 128-bit PPC/MIPS stye almost-quad precision type implemented with a pair of 
> 64-bit doubles.

This is a horrible idea, I think.  It's gratuitously incompatible
with other m68k, and most other popular platforms.

> This email is a RFC to try and gauge which of the two options is most useful 
> to the ColdFire community. ie. are there significant users that would benefit 
> from (2).

I'm not a member of this community though, so I'll be quiet.


r~