On Friday, February 26, 2021 12:23 PM, Alexander Sverdlin wrote: > On Fri, 2021-02-26 at 17:43 +0100, Arnd Bergmann wrote: >> Randconfig builds with ep93xx fail with the clang integrated assembler >> that does not understand the maverick crunch extensions: >> >> arch/arm/mach-ep93xx/crunch-bits.S:94:2: error: invalid instruction >> Â cfstr64 mvdx0, [r1, #0] @ save 64b registers >> >> It is unclear if anyone is still using support for crunch: gcc-4.8 >> dropped it in 2012 when it was already too broken to be used >> reliabled. glibc support existed as an external patch but was never merged >> upstream. >> We could consider removing the last bits of the kernel support as well. > > This was my impression already in 2006, that Cirrus is not going to work on > Crunch support. From my PoV it's OK to remove the support in the kernel > completely.
Martin Guy did a lot of work trying to get the maverick crunch working but I was never able to successfully use it for anything. It "kind" of works but depending on the EP93xx silicon revision there are still a number of hardware bugs that either give imprecise or garbage results. I have no problem with removing the kernel support for the maverick crunch. Hartley
