vadik wrote: > I have implementation of Virtex4 with hw FPU trough APU . > >Is there any Real Time OS that directly supports this implementation without >relying on sw floating point emulation.
This is a matter of tool chain and setup of your kernel? >Xilinx Relesed GCC build of their own that is patched to support the apu fpu >implementation , but this helps me on the application level but if the >kernel doesn't support this implemntation i have a problem . Indeed, the kernel has to save and restore FPU registers upon task switch. You should look for CONFIG_PPC_FPU in the Kconfig of Linux. I can't help you more, because I'm not used to the ppc in Virtex4. However, there must be some appropriate forums on Xilinx site. >linux is not RT enough , does the linuxwoks supports this kind of >implementation ? Have you considered Xenomai[1], the F/OSS hard real-time extension to Linux? It works great on all range of powerpc's, and it is rock solid. [1] http://xenomai.org Regards -- Stephane _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded