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Re: [Qemu-devel] [PATCH v2 for-1.1 4/4] tcg/ppc: Fix CONFIG_TCG_PASS_ARE

From: Andreas Färber
Subject: Re: [Qemu-devel] [PATCH v2 for-1.1 4/4] tcg/ppc: Fix CONFIG_TCG_PASS_AREG0 mode
Date: Wed, 09 May 2012 03:03:25 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120421 Thunderbird/12.0

Am 09.05.2012 02:43, schrieb malc:
> On Wed, 9 May 2012, Andreas F?rber wrote:
>> Adjust the tcg_out_qemu_{ld,st}() slow paths to pass AREG0 in r3,
>> based on patches by malc.
>> Also adjust the registers clobbered, based on patch by Alex.
> Alexander, my head is splitting now, so i can not calculate things inside
> it, aren't we reserving skipped registers in some circumstances?

Yes, we are. The original code did, and Alex found it too complicated
for the immediate build fix when I suggested it. As you can see, I've
already split up into AREG0 and non #ifdef paths because it got too
unreadable when having one line with multiple or'ed #if conditions.

Optimizations we can still do when the build is restored.


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