Re: [Qemu-devel] [PATCH qom-cpu 0/5] TCG code generation performance fix

["Andreas Färber" <afaerber@suse.de>]

Am 02.07.2013 21:59, schrieb Richard Henderson:
> On 07/02/2013 12:31 PM, Andreas Färber wrote:
>> Hello,
>>
>> As Richard explained, the purpose of having separate gen_intermediate_code()
>> and gen_intermediate_code_pc() functions per target is to compile-optimize
>> gen_intermediate_code_internal() for the non-_pc case.
>>
>> Multiple targets were using static rather than static inline though, fix this.
>>
>> I've split these off from my refactorings so that we can backport them to stable,
>> and I'm rebasing my argument refactoring patches on top.
>>
>> No actual performance changes have been benchmarked, these changes serve more
>> to align our targets as clear examples for new targets such as rl78 and bfin.
> 
> All:
> Reviewed-by: Richard Henderson <rth@twiddle.net>
> 
> Although we should probably do some benchmarking at some point to see if
> the duplicated code paths really do improve things over, say, unlikely().

I did wonder about unlikely() last night, but I thought that's just a
branch optimization whereas inline might avoid some branches in the
first place.

> But failing that we should at least have conformity of implementation.

Thanks, applied to qom-cpu (moving log_cpu_state to qom-cpu-next):
https://github.com/afaerber/qemu-cpu/commits/qom-cpu
(If maintainers want to ack/nack, please do.)

Andreas

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