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.
Paolo
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