On Thu, May 26, 2011 at 11:00:24AM +0200, Paolo Bonzini wrote: > On 05/26/2011 10:26 AM, Gleb Natapov wrote: > >Why would c->dst.bytes != c->src.bytes for cwd/cdq/cqo if we'll set > >c->dst.bytes to op_bytes during decode? > > Duh, you're right, cwd/cdq/cqo uses SrcAcc which has > > c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; > > so in practice c->src.bytes = c->op_bytes. > > I still find it confusing that DstDX would use c->op_bytes without > honoring ByteOp unlike pretty much everything else; but yes, there > is a possible use of DstDX outside in/out. > We can make it honor ByteOp. There will be no instruction that will specify DstDX | ByteOp though. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
