Re: [B2-devel] Basilisk II FPU problem with Speedometer 3.23

[Tomek J. <to...@je...>]

Gwenole Beauchesne napisa=C5=82(a):

> Hi,
>
> On fast machines, or with JIT enabled, Speedometer 3.23 can crash at=20
> the exit of FPU tests. With a Quadra 630 ROM, the relevant code=20
> snippet is:
> pc 0200db76 | 0838 0000 1efc btst #$00,MMFlags
> pc 0200db7c | 660e bne.s $0200db8c
> pc 0200db8c | 2008 move.l a0,d0
> pc 0200db8e | 2240 movea.l d0,a1
> pc 0200db90 | 6702 beq.s $0200db94
> pc 0200db92 | 2051 movea.l (a1),a0
> The crash occurs once you validate the "Tests are done" dialog.
>
> A1 is somehow corrupted and always has 0xffff00ff when a crash occurs=
=2E=20
> I could reproduce the problem in 32-bit or 64-bit x86 mode. In any=20
> addressing mode. In 68030+FPU or 68040, which are the same. With any=20
> FPU emulation (UAE, IEEE).
>
> Of course, it's easier (faster) to get a crash with JIT enabled. This=
=20
> yielded the question of possible problems with nested EMUL_OP=20
> processing or Execute68k()? I am not quite sure.
>
> Workarounding the faulting 68k instruction will simply make B2 crash=20
> later. The OS is 8.1 with 32 MB.
>
> Anobody got similar problems?
>
I have identical problem with Speedometer 4.0 both with the Linux and=20
Windows version of Sheepshaver. Tests are finished, the results are=20
about to be displayed and poof! Sheepshaver crashes. It happens every=20
time. The OS is 8.6 and the fost PC is AMD64 3200.

Tomek