flac dev - Mar 2015 - ensure that stack is aligned for SSE functions if using mingw32

On 03/09/15 03:59 PM, lvqcl wrote:
> Tristan Matthews wrote:
>
>> >Unable to test on win32 at the moment, please give this a try.
Feedback welcome.
>
> I wonder why misaligned stack is a problem only for the FLAC library.
> There are many other libraries inside VLC...
>
> BTW: FLAC 1.3.1 uses -msse2 option by default. Do you remove it?
> Otherwise libFLAC may crash anywhere else (if its stack is not aligned).
One workaround is to use -mstackrealign where ever -msse2 is used
Dave

On Mon, Mar 9, 2015 at 7:57 PM, Dave Yeo <dave.r.yeo at gmail.com>
wrote:
> On 03/09/15 03:59 PM, lvqcl wrote:
>> Tristan Matthews wrote:
>>
>>> >Unable to test on win32 at the moment, please give this a try.
Feedback welcome.
>>
>> I wonder why misaligned stack is a problem only for the FLAC library.
>> There are many other libraries inside VLC...
>>
>> BTW: FLAC 1.3.1 uses -msse2 option by default. Do you remove it?
>> Otherwise libFLAC may crash anywhere else (if its stack is not
aligned).
>
> One workaround is to use -mstackrealign where ever -msse2 is used
Yes, that was one of the options mentioned in the article I linked
(http://www.peterstock.co.uk/games/mingw_sse)

Tristan Matthews wrote:
> > One workaround is to use -mstackrealign where ever -msse2 is used
> 
> Yes, that was one of the options mentioned in the article I linked
> (http://www.peterstock.co.uk/games/mingw_sse)
Can someone confirm that -mstackrealign fixes this issue? If it works,
that seems like the sanest solution.

Erik
-- 
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/