Re: [B2-devel] JIT improvements and future directions?

[Christian B. <cb...@th...>]

Hi!

On Wed, Oct 02, 2002 at 06:36:13PM +0200, Gwenole Beauchesne wrote:
> 001: e9c5     565147 BFEXTU

Interesting that this gets used so much. It's probably just a benchmark thing,
not worth bothering about.

> 011: a829     147549 ILLEGAL

LayerDispatch() (I have no clear idea what this does...)

> 013: a030     134593 ILLEGAL

OSEventAvail() (this was to be expected)

> 014: a0dd     131286 ILLEGAL

PPCDispatch() ("PPC" as in Program-To-Program-Communications)

> 015: abf7     131264 ILLEGAL

SynchIdleTime() (also to be expected)

> 018: a873      62307 ILLEGAL

SetPort()...

> For those, I don't remember whether the OS is supposed to save registers 
> itself or not.

According to my notes, traps >=A800 save all registers. Traps A000..A7FF
save at least d3-d7/a3-a6, sometimes more (I don't remember whether there
are any clear API conventions here; e.g. there is code that expects
A0BD (vCacheFlush) to save all registers).

Bye,
Christian

-- 
  / Coding on PowerPC and proud of it
\/ http://www.uni-mainz.de/~bauec002/