Re: [hatari-devel] Debugger FPU bug ?

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 10/02/2020 à 00:02, Eero Tamminen a écrit :
> Hi,
>
> Ok, so it's the external disassembler which is
> buggy.

Hi

it's possible some FPU opcodes are not correctly handled. There're quite 
a lot of combination and this can make the disasm code more complex to 
handle them all. At least I don't feel like trying to fix it :)

> Nicolas, where we are with removing the external
> one, once the UAE core one gets features that
> were missing from it?

I don't remember if it was decided to drop it completely, but at least 
we can make internal WinUAE cpu core disassembler the default now, as it 
was much improved lately (MMU and FPU opcodes) and should now be more 
accurate than external disassembler in all cases.

Note that external disassembler can still be useful in the sense that 
its output can be more or less recompiled with devpac for example. On 
the opposite WinUAE's internal debugger add many useful infos (memory 
content, effective address display), but this can make each disasm line 
not directly assemblable without editing it first.

For now, maybe it's just enough to change this line in configuration.c

ConfigureParams.Debugger.bDisasmUAE = false

and to use 'true' instead of 'false'

Nicolas




>      - Eero
>
> On 2/9/20 9:20 PM, Laurent wrote:
> > And the trace :
> >
> >  > c 1
> > Returning to emulation for 1 CPU instructions...
> > cpu video_cyc= 66756 196@ 65 : 00025ADE f202 7080 FMOVE.W FP1,D2
> >
> > Laurent
> >
> >
> > It seems to be wrong with both disasm and debug.
> >
> > Laurent
> >
> >
> > Le 09/02/2020 à 20:13, Laurent a écrit :
> > > With uae debugger, I get :
> > >
> > > 00025AFE f202 7080                FMOVE.W FP1,D2
> > >
> > >
> > > Laurent
> > >
> > >
> > > Le 09/02/2020 à 20:03, Eero Tamminen a écrit :
> > > > Hi,
> > > >
> > > > On 2/9/20 8:41 PM, Laurent wrote:
> > > > > Maybe a little bug in the debugger :
> > > > >
> > > > > My code is :
> > > > >
> > > > >              fmove.w        fp1,d2
> > > > >
> > > > > The debugger says :
> > > > >
> > > > > CPU=$25ade, VBL=1021, FrameCycles=67068, HBL=65, LineCycles=508, 
> > > > > DSP=$1b0
> > > > > $00025ade : f202 7080                          fmove.w d2,fp1
> > > > >  > c 1
> > > > > Returning to emulation for 1 CPU instructions...
> > > > >
> > > > > It seems the instruction is displayed the wrong way.
> > > >
> > > > Does internal disassembler [1] show it correctly?
> > > >
> > > > [1] "setopt --disasm uae" in debugger, or
> > > > "--disasm uae" option on Hatari command line.
> > > >
> > > >
> > > >     - Eero