[Mageia-dev] Clanlib2 and SSE2 on i586

Tue Dec 4 19:00:17 CET 2012

Le 04/12/2012 13:21, Pascal Terjan a écrit :
+> On Tue, Dec 4, 2012 at 12:10 PM, AL13N<alien at rmail.be>  wrote:
+>>> The code should really be complied but only enabled at runtime if it's
+>>> available. PulseAudio does this. It's more of a pain to code for but
+>>> does make like easier for distributions.
+>>>
+>>> But yeah, short term fix, nuke the test, and as a meme says, keep calm
+>>> and carry on.
+
+It is not only a test, it is a crash.
+
+
+>>
+>> but, do ALL recent i586 CPU's have SSE2? what about the embedded and VIA
+>> cpu's and the likes?
+
+http://en.wikipedia.org/wiki/SSE2#CPUs_supporting_SSE2
+
+>
+> The test is that it refuses to run if the lib is not using sse2 while
+> it could (slowly).
+>
+> The clanSWRender lib needs to be fixed to have sse2 support on sse2
+> system and not on non sse2 systems so that we can enable it but that's
+> something unrelated to dropping this test.
+
+No, the clanSWRender has only a SSE2 implementation because no one wants 
+to write a SW render which is too slow.
+http://lists.debian.org/debian-devel-games/2012/03/msg00076.html
+
+
+I wonder if we could enable for now SSE2, till upstream/somebody has a 
+better fix : for now, all SSE2 cpus crash. Enabling SSE2 it will only 
+crash on non-SSE2 cpus (older than 10 years)
+