RE: [Xen-ia64-devel] PATCH: more instructions handled in mmio.c

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

>From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
>[mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Tristan
>Gingold
>Sent: 2006?4?13? 20:39
>To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx; Alex Williamson
>Subject: [Xen-ia64-devel] PATCH: more instructions handled in mmio.c
>
>Hi,
>
>this patch adds a few instructions decoded in mmio.c
>
Yes, this is a great patch.
Maybe we also need to implement ldfp8 :-)

One concern is we can not use getfpreg directly.
Because f32~f127 are not saved into current->arch._thread.fph,
and f2~f5 and f12~f31 are not saved into pt_regs or switch_stack.
Only f6~f11 are guaranteed to be saved into pt_regs.
f2~f5 and f12~f31 are saved into switch_stack only when domain switch happens.
Structure pt_regs and switch_stack are different with those in linux kernel.
Maybe we need to implement getfpreg and setfpreg ourselves.


Thanks,
Anthony





>Tristan.

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