Re: [Qemu-devel] [PATCH v2 12/12] disas/mips: Disassemble R5900 DIV[U]1, M{F, T}{LO, HI}1 and MULT[U]1

[Fredrik Noring]

Hi Aleksandar,

> I am glad that you want to include QEMU disas support for R5900 - this
> area usually gets forgotten.
> 
> But, as you can see, this MIPS feature is partially broken - it doesn't
> handle well overlapping opcodes, and the field "membership" is not taken
> into account at all. I think the feature should be fixed first, and then
> R5900 support added. In fact, the disassembler support in QEMU is almost
> independent on the emulation support (for the corresponding instructions)
> - so, we could add disassembler support for all R5900 instructions in one
> clean sweep, instead dividing that in "million" pieces.
> 
> The key to the successful solution would be detecting what CPU is
> currently being emulated, and making disassembling decision based on that.
> 
> Let's talk about that later.

Yes, the current disassembly table needs to be reworked, so let's postpone
the opcodes for the R5900.

> P.S. Sorry for misspelling your name on several occasions.

No problem!

Fredrik