Re: [PATCH] powerpc: remove fpscr use from [kvm_]cvt_{fd,df}
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2010-08-25 01:30:56
On Tue, 2010-08-24 at 15:15 +1000, Michael Neuling wrote:
quoted
quoted
Do some 32 bit processors need this? In 32 bit before the merge, we use to have code that did: #if defined(CONFIG_4xx) || defined(CONFIG_E500) #define cvt_fd without save/restore fpscr #else #define cvt_fd with save/restore fpscr #end if Kumar; does this ring any bells?I don't see anything in the various 440 docs I have at hand that would hint at lfd/stfs adffecting FPSCR.The way the ifdefs are, it's the other way around. 4xx procs don't need to save/restore fpscr and others do.
Right, my bad. In any case, Paulus reckons it's all his mistake and we really never need to save/restore fpscr. Cheers, Ben.