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  1.  Home
  2. MI400
  3. November 2001

Re: opcode encoding

----- Original Message -----
From: "Leif Svalgaard" <leif@leif.org>


> What are the rules for the opcode encoding?  The opcode for branch is
> X'1011', but also appears as X'3011'. CALLI is X'0293' but sometimes
appears
> as X'2293'.
>
> ===> If an instruction is the target of a branch is has the X'0200' bit
set
> to one.
> This is one way to ensure that you only can branch to designated branch
> points.
>
>

Thank you Leif. I would have never gotten that answer on my own.

-Steve

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