[Xen-ia64-devel]Question about priv_ptc_e

To:	"Magenheimer, Dan \(HP Labs Fort Collins\)" <dan.magenheimer@xxxxxx>
Subject:	[Xen-ia64-devel]Question about priv_ptc_e
From:	"Xu, Anthony" <anthony.xu@xxxxxxxxx>
Date:	Fri, 10 Mar 2006 14:06:07 +0800
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Thread-topic:	[Xen-ia64-devel]Question about priv_ptc_e

Dan,
Why is ptc_e emulated as fc when gr is larger than 63?

IA64FAULT priv_ptc_e(VCPU *vcpu, INST64 inst)
{
        UINT src = inst.M28.r3;

        // NOTE: ptc_e with source gr > 63 is emulated as a fc r(y-64)
        if (src > 63) return(vcpu_fc(vcpu,vcpu_get_gr(vcpu,src - 64)));
        return vcpu_ptc_e(vcpu,vcpu_get_gr(vcpu,src));
}
Thanks,
-Anthony 


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[Xen-ia64-devel]Question about priv_ptc_e