I have two graphics cards R9 290 (XFX and Sapphire)
But they don't want to work with the mining SPR, although perfectly produce any X11, n-scrypt.
Spread-GPU-miner and spreadcoinx11-sgminer-girino behave exactly the same. The Assembly is the kernel (*.bin) and all. Stop.
All other video cards work fine with both miners. (HD7970, R9 270X, R9 280X)
I run an AMD r9 290 sapphire.
update to latest AMD drivers. Then try again.
can't help with xfx. never touched that flavour.
Follow the links to the youtube video for some help. There is also a link to AMD's auto driver check and download.
http://spreadcoin.info/downloads.php