[OpenBIOS] Back at it again( PCI Passthrough )

[Segher Boessenkool]

On Wed, May 09, 2018 at 07:51:43PM +0100, Mark Cave-Ayland wrote:
> On 09/05/18 15:07, Segher Boessenkool wrote:
> 
> >On Wed, May 09, 2018 at 08:27:14AM -0400, Jd Lyons wrote:
> >>Bear with me, while I try to understand this, but it looks like b?branch 
> >>sets up some type of temporary buffer, and b(>resolve) try to “flush” 
> >>that buffer.
> >
> >Yes; and that is incorrect.  b?branch in interpret mode is only allowed
> >for forward branches (which you have here), and it should simply skip that
> >much forward (in the fcode stream) if the top of stack was 0.  Not compile
> >anything.
> 
> I'm not sure that's strictly true; certainly this is a difference in how 
> the FCode part of the IEEE-1275 specification is implemented in OpenBIOS 
> compared to others, but I wouldn't classify it outright as wrong.

It can be used for example to conditionally use the 64-bit extensions.
This won't work if you try to compile things that are supposed to be
stepped over ;-)

Not that I see what is exactly going wrong here...


Segher