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xen-devel
Re: [Xen-devel] hvm_decode() questions
On 24/11/06 14:03, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
> 1) single-byte opcode 0x87 (xchg): What is this strange conditional
>
> if ( ((*(opcode+1)) & 0xc7) == 5 )
>
> supposed to address? xchg has absolutely symmetric operands.
>
> 2) two-byte opcode 0xB7 (movzx): What is this dependency on rex
> bit 3 doing here? Apparently this was based on Intel's (broken)
> documentation - the source operand is always 16 bits.
>
> Unless someone can explain these, I'll send a patch to remove them.
Yes, these can both be removed.
-- Keir
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