[GEM-dev] various pix_objects crashing

[Peter Plessas]

> i was no able to reproduce the crash when running Gem compiled with 
> sse2-support on an athlon-XP (which has NO sse2-support).
>
> this is bad.
>
> it shakes my believes that gcc produces code suitable for several flavours of 
> cpu, like intels icc is able to do.
> (it is also good, since gcc optimizes generic code)
>
> i guess i will have to add some flags to configure which allows you to set 
> the level of simd-optimization (like stopping at mmx).
> even better would be to autodetect the cpu at configure time and use 
> appropriate flags (which could be overruled via cmdline options)
>
> in the meantime, just remove the "-msse2" flag (and make sure that the 
> "-mmmx" flag stays, so you have at least _some_ benefit) from the Make.config 
> (_after_ configure)

Ah, so this means that the ./configure --disable-SIMD stays valid and the 
-msse2 is to be removed in addition?

thanks
P

>
> mfa.dr.
> IOhannes
>