RE: [Xen-ia64-devel] [PATCH] emulate ldfp8 in mmio

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

>From: Tristan Gingold 
>Sent: 2006年4月26日 16:32
>To: Xu, Anthony; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-ia64-devel] [PATCH] emulate ldfp8 in mmio
>
>Le Mardi 25 Avril 2006 07:30, Xu, Anthony a écrit :
>> 1. emulate ldpf8 in mmio
>> 2. handle floating point register rotation in functions setfpreg and
>> getfpreg
>Just a late comment:
>
>writes to f0/f1 are not correctly handled.  A fault must be reflected to user.
>
>From intuition, it's a bug,

After studying ldfp instruction further, this maybe not a bug,
Before reading memory, processor will check target fp register, if the target 
fp register is f0 or f1, a fault happens.

Thanks,
Anthony


>Tristan.

_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel