Re: [Qemu-devel] [PATCH] tcg, tci: Add TCG and interpreter for bytecode (virtual machine)

[Stuart Brady <sdbrady@ntlworld.com>]

On Sun, Oct 11, 2009 at 06:33:57PM +0200, Stefan Weil wrote:
> Stuart Brady schrieb:
> > exec-all.h defines 'USE_DIRECT_JUMP' based on the host architecture,
> > which is not relevant under TCI. Also, a tb_set_jmp_target1()
> > implementation is needed for TCI.

> Done. Tested with mips / mipsel host.

I think the #ifdef CONFIG_TCG_INTERPRETER sections belong before
the arch-specific sections. :-)

> Alignment is still to be done (my test platforms don't need it).

I will do this at some point if nobody beats me to it. :-)

BTW, I'm wondering about certain places that require host-specific
code... for example:

 * qemu-lock.h, which is used by cpu_exec() for the tb lock and by
   cpu_unlink_tb() for non-NPTL hosts.

 * The generic cpu_get_real_ticks() doesn't seem great... I suppose
   the MIPS version using clock() might be more appropriate?

Apart from this, I suppose user mode emulation simply has to depend
on host-specific code for signal handling... :-(

I gather INDEX_op_call handling could be improved?  Presumably that's
really just a matter of casting to the right type of function pointer
when making each call?

Cheers,
-- 
Stuart Brady