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Date: Tue, 04 Nov 2003 23:46:47 +0100
From: Fabrice Bellard <fabrice.bellard@free.fr>
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Subject: Re: [Qemu-devel] Interpreter for QEMU
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To: qemu-devel@nongnu.org

It would be interesting to find a way to generate both the dynamic 
translator and the interepreter from the same description. I see that 
you are using ML to generate the interpreter. This is an original choice!

It is true that a solution must be found to accelerate the DOS programs, 
especially when soft mmu is not in use. [When soft mmu is in use, it is 
possible to examine exactly each write access to see if the translated 
code is modified with a byte granularity].

Fabrice.

malc wrote:
> Hello,
> 
> http://www.boblycat.org/~malc/1_iqemu.patch.gz conatains patch against CVS
> version of QEMU that adds interpreted i386 target. Im hoping that someone
> more apt than me can somehow breed it together with dynamic translator, so
> that QEMU will be more viable for DOS emulation (interpreter can help some
> with self-modifying code (so loved by DOS programmers) and/or highly
> interleaved code/data, when host'spage faults take too much time)
> 
> I was able to boot FreeDOS and run some applications with this purely
> interpreted target, though apparently there are still some bugs lurking.
> 
> To apply the patch:
> $ cd cvs/version/of/qemu
> $ zcat patch/location/1_iqemu.patch.gz | patch -p1
> $ ./configure --target-list="i386-softmmu i386-interp"
> $ gmake
> 
> Note that: interpreter is currently x86 specific and there is no FPU
> support whatsoever.
> 
> Sincerely,
> malc
>