Build regressions/improvements in v3.4-rc7
John David Anglin
dave.anglin at bell.net
Thu May 17 10:27:35 EST 2012
On 16-May-12, at 10:46 AM, James Bottomley wrote:
> Wow, lib/mpi/ is a complete horror: it's full of hand crafted asm
> code.
> The error in this case appears to be that umul_ppm() is implemented as
> an xmpyu instruction. That's a floating point instruction. We
> deliberately compile the kernel with floating point disabled because
> we
> don't want to save and restore the floating point register file on
> each
> context switch, hence the operand constraints are unsatisfiable.
I haven't tried this but I think the parisc implementation of umul_ppmm
can be deleted. There is a generic version in the file.
Dave
--
John David Anglin dave.anglin at bell.net
More information about the Linuxppc-dev
mailing list