RE: [Xen-ia64-devel] PATCH: rewrite vcpu_get_psr

To:	"Tristan Gingold" <tgingold@xxxxxxx>, "Alex Williamson" <alex.williamson@xxxxxx>
Subject:	RE: [Xen-ia64-devel] PATCH: rewrite vcpu_get_psr
From:	"Xu, Anthony" <anthony.xu@xxxxxxxxx>
Date:	Fri, 11 May 2007 13:54:28 +0800
Cc:	Xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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Thread-topic:	[Xen-ia64-devel] PATCH: rewrite vcpu_get_psr

>Tristan Gingold
>Sent: 2007年5月11日 13:23
>To: Alex Williamson
>Cc: Xen-ia64-devel
>Subject: Re: [Xen-ia64-devel] PATCH: rewrite vcpu_get_psr
>
>> Unfortunately...
>It's a little bit puzzling.  I didn't think the performace of mov =psr.l was
>to important!



+
+       if (!PSCB(vcpu, metaphysical_mode))
+               newpsr.i64 |= IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_IT;

-       if (PSCB(vcpu, metaphysical_mode))
-               newpsr.dt = 0;

Above old code would be translated to
        if (PSCB(vcpu, metaphysical_mode))
                newpsr.i64 &= ~IA64_PSR_DT;

Thanks,
Anthony

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RE: [Xen-ia64-devel] PATCH: rewrite vcpu_get_psr