Am 20.02.2011 09:42, schrieb Wolfgang Denk: > Dear Alexander Holler, > > In message<1298171532-5296-1-git-send-email-hol...@ahsoftware.de> you wrote: >> Without -msoft-float the compiler would be allowed to use certain >> floating-point instructions (VFP/NEON) e.g. for optimizations, which >> would require additional code, for example to save contexts for >> interrupts. Add a comment which describes this in short words. > > Hm... why do you see a need to explain this for ARM, but not so for > the other architectrures, say for PowerPC?
I don't know how other the compiler behaves for other architectures and if those are having the need to save fp-contexts for irqs. > > If you really want to add this, then it should probably be somewhere > in the REAME or another central place of documentation (instead of > distributed over tons of Makefiles), and to make your message I prefer comments where they are usefull. Hiding them somewhere is useless. > understood you might want to add "additional code" may mean that > additional function blocks in the respective SoC may need to be > initialized and, for example, clocked, which may for example > significantly increase the power dissipation of the system. > >> +# -msoft-float forces the compiler to not use any fp-related instructions. > > Well, now this is a commonplace that says about nothing and can be > leftout as well. # -msoft-float forces the compiler to avoid any fp-related instructions for optimizations. Would that be better? Regards, Alexander _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
