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Re: [Qemu-devel] [PATCH 2/5] Add a PowerPC branch detector

From: Alexander Graf
Subject: Re: [Qemu-devel] [PATCH 2/5] Add a PowerPC branch detector
Date: Thu, 17 Jan 2008 15:40:25 +0100
User-agent: Thunderbird (X11/20070801)

Thiemo Seufer wrote:
> Johannes Schindelin wrote:
>> Hi,
>> On Thu, 17 Jan 2008, Thiemo Seufer wrote:
>>> Alexander Graf wrote:
>>> [snip]
>>>>> Is check_ops.sh not enough for debugging micro-ops?
>>>> Basically it should be. PowerPC branching can be (regex) b..rl. Honestly
>>>> I did not know about this script though and as it was not in the
>>>> makefile, it did not tell me that something wrong was going on. This
>>>> check costs near no time and has to be passed in order to build
>>>> successfully.
>>>> So either check_ops should be fixed (not only brl) and put into the
>>>> Makefile.target or a check like this is good to have.
>>> Fixing check_ops is IMO preferable, OTOH I hope the whole problem goes
>>> away with the new code generator which is in the works.
>> The code generated by that new code generator is substantially slower than 
>> what we have right now, so I am not so enthusiastic.
> I meant not qops but something Fabrice is working on. Which apparently has
> about the same speed.

Either way I wouldn't mind having a working gcc4 version for the time
being, including checks that it doesn't break too easily again.


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