[FFmpeg-devel] lurking bugs in the mmx-related assembler code (?)

u-h8zb at aetey.se u-h8zb at aetey.se
Sat Oct 1 18:56:29 EEST 2016

On Sat, Oct 01, 2016 at 05:44:13PM +0200, wm4 wrote:
> AFAIK most MMX code in FFmpeg does not run emms (i.e. keeps the FPU
> state trashed) until returning to the API user.

This means when malloc()/free()/... happens to be called internally,
it corrupts the malloc structures, in a non-straightforward ways.


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