[pulseaudio-discuss] [PATCH] Make pulse build with clang again

[Colin Guthrie]

'Twas brillig, and Maarten Bosmans at 28/09/11 20:54 did gyre and gimble:
> 2011/9/28 Maarten Bosmans <mkbosmans at gmail.com>:
>> 2011/9/28 Arun Raghavan <arun.raghavan at collabora.co.uk>:
>>> On Wed, 2011-09-28 at 09:50 +0200, Maarten Bosmans wrote:
>>>> This patch was sent to the list before, but was deemend to riscy pre-1.0.
>>>> So now I'll resend. It does touch de same code as David fixed with 42bcb418aed SSE/MMX: Fix problem with highpitched
>>>> noise on i386, but I leaves his solution intact, so it should be safe.
>>>>
>>>> The problem this patch is trying to solve is that the (pa_reg_x86) is not meaningfull with the "m" modifier. GCC ignores
>>>> this, but clang (correctly) whines about it.
>>>
>>> Do we have an easy way to make sure the problem David fixed continues to
>>> not be there with this patch?
>>
>> There's no regression test for this. I have some tests here locally
>> and will try it.
> 
> OK, so I have verified it, the patch is safe.
> 
> This is tested with a new test: svolume-test, which I added in order
> to be able to verify the further orcification of the svolume functions
> I did. Basically it is just the testing code that was already present
> in the svolume_{arm,mmx,sse,orc}.c files beefed up a bit.:
> https://github.com/mkbosmans/pulseaudio/commit/cf0c5c9ad47ba0434b0518ca79ca802d0e62153a
> 
> Running svolume-test with David's patch reversed exits with an error
> status and both with current git master and with my patch on top of
> that succeeds.

Interesting. The problem we had was 32-bit only before when adjusting
channel volumes separately - this introduced artefacts into the sound
produced... dunno if your test covers this case or not, but it's nice to
see that the test actually errors out with David's patch reverted.

Am just testing now (along with all the other pending patches), so will
likely push this in a couple hours.

Col

-- 

Colin Guthrie
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http://colin.guthr.ie/

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