Re: [Qemu-devel] [PATCH 2.3 0/8] Linked list for tcg ops

[Paolo Bonzini <pbonzini@redhat.com>]

On 11/11/2014 17:24, Richard Henderson wrote:
> Currently tcg ops are simply placed in a buffer in order.  Which is
> fine until we want to actually do something with the opcode stream,
> such as optimize them.  Note the horrible things like call opcodes
> needing their argument count both prefixed and postfixed so that we
> can iterate across the call either forward or backward.
> 
> While I'm changing this, I also move quite a lot of tcg-op.h out of
> line.  There is very little benefit to having most of them be inline,
> since their arguments are extracted from the guest instructions being
> translated, and thus their values are not really predictable.
> 
> I chose a cutoff of one function call.  If a tcg-op.h functionconsists
> of a single function call, inline it, otherwise move it out of line.
> 
> This also removes a bit of boilerplate from each target.
> 
> I haven't been able to measure a performance difference with this
> patch set.  I wouldn't really expect any, as the complexity level
> remains the same.  I simply find the link list significantly more
> maintainable.
> 
> Of course this isn't intended for the upcoming 2.2 release.
> 
> Comments?

Happy new year! :) Are you going to submit this now?

Paolo