Weirdness in disassembly
Frank Ch. Eigler
fche@redhat.com
Fri Sep 27 08:41:00 GMT 2002
Hi -
On Fri, Sep 27, 2002 at 05:19:33PM +0200, Michael Chapman wrote:
> [...]
> My mistake somewhere. Not sure when though. The opcode
> for the 32 bit instruction is the same as that for
> the 16 bit variant of it (well it was in how I had typed
> it)!
>
> Fixed that now. And I now get the correct disassembly.
Good stuff.
CGEN would benefit from improved detection of this sort of error.
If you were to generate a simulator kernel, you'd have been told of
the ambiguity.
> Now what values should I have for the instruction lengths?
> Obviously at least one of them has to be 16 bits for
> not skipping over to much when decoding junk.
Since a real program should not contain junk, a specific choice for
the other variables is not that important. Go with whatever
working numbers you prefer. The base-insn-size is the biggie.
- FChE
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