Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine)

[malc]

On Sun, 18 Sep 2011, Blue Swirl wrote:

> On Sun, Sep 18, 2011 at 10:49 AM, malc <address@hidden> wrote:
> > On Sun, 18 Sep 2011, Blue Swirl wrote:
> >
> >> On Sat, Sep 17, 2011 at 7:59 PM, Stefan Weil <address@hidden> wrote:
> >> > Hello,
> >> >
> >> > these patches add a new code generator (TCG target) to qemu.
> >> >
> >> > Unlike other tcg target code generators, this one does not generate
> >> > machine code for some cpu. It generates machine independent bytecode
> >> > which is interpreted later. That's why I called it TCI (tiny code
> >> > interpreter).
> >> >
> >> > I wrote most of the code two years ago and included feedback and
> >> > contributions from several QEMU developers, notably TeleMan,
> >> > Stuart Brady, Blue Swirl and Malc. See the history here:
> >> > http://lists.nongnu.org/archive/html/qemu-devel/2009-09/msg01710.html
> >> >
> >> > Since that time, I used TCI regularly, added small fixes and improvements
> >> > and rebased it to latest QEMU. Some versions were tested using
> >> > ARM (emulated and real), PowerPC (emulated) and MIPS (emulated) hosts,
> >> > but normally I run it on i386 and x86_64 hosts.
> >> >
> >> > I'd appreciate to see TCI in QEMU 1.0.
> >> >
> >> > Regards,
> >> > Stefan Weil
> >> >
> >> > The patches 2 and 4 are optional, patch 8 is only needed for running
> >> > TCI on a PowerPC host.
> >>
> >> I think patches 1 to 4 and 8 could be applied soon as they are now,
> >> they should benefit plain TCG too. I had some comments to other
> >> patches, but otherwise everything looks great.
> >
> > Hold the horses untill Stefan settles the licensing issues.
> 
> Which issues? For which patches?
> 

Read tcg/LICENSE.

> >>
> >> Comparisons to other bytecode interpreters (for example Python) would
> >> be interesting, maybe there are also tricks that can be reused.
> >>
> >> > [PATCH 1/8] tcg: Declare TCG_TARGET_REG_BITS in tcg.h
> >> > [PATCH 2/8] tcg: Don't declare TCG_TARGET_REG_BITS in tcg-target.h
> >> > [PATCH 3/8] tcg: Add forward declarations for local functions
> >> > [PATCH 4/8] tcg: Add some assertions
> >> > [PATCH 5/8] tcg: Add interpreter for bytecode
> >> > [PATCH 6/8] tcg: Add bytecode generator for tcg interpreter
> >> > [PATCH 7/8] tcg: Add tcg interpreter to configure / make
> >> > [PATCH 8/8] ppc: Support tcg interpreter on ppc hosts
> >> >
> >> >
> >>
> >
> > --
> > mailto:address@hidden
> >
> 

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