[LLVMdev] [LLVMDev] Add not instruction to PTX backend

[Justin Holewinski]

On Sun, May 8, 2011 at 2:41 AM, 陳韋任 <chenwj at iis.sinica.edu.tw> wrote:

> Hi, all
>
>  I am trying to add "not" instruction support to PTX backend.
> I add the line below in PTXInstrInfo.td,
>
> defm NOT : PTX_LOGIC<"not", not>;
>
>  But I get errors below,
>
>
> -------------------------------------------------------------------------------
> Included from PTX.td:75:
> PTXInstrInfo.td:732:10: error: Value 'PTX_LOGIC::opnode' of type 'SDNode'
> is incompatible with initializer 'not'
> defm NOT : PTX_LOGIC<"not", not>;
>         ^
> llvm[3]: Building PTX.td subtarget information with tblgen
> Included from PTX.td:75:
> PTXInstrInfo.td:732:10: error: Value 'PTX_LOGIC::opnode' of type 'SDNode'
> is incompatible with initializer 'not'
> defm NOT : PTX_LOGIC<"not", not>;
>         ^
> llvm[3]: Building PTX.td assembly writer with tblgen
> Included from PTX.td:75:
> PTXInstrInfo.td:732:10: error: Value 'PTX_LOGIC::opnode' of type 'SDNode'
> is incompatible with initializer 'not'
> defm NOT : PTX_LOGIC<"not", not>;
>         ^
>
> -------------------------------------------------------------------------------
>
>  How do I fix those errors?
>
>  I also see that multiclass PTX_LOGIC only handles 3 operand form,
> i.e., xor.pred d, a, b;. Should I add something to make PTX_LOGIC
> support 2 operand form?
>

We're been writing multiclasses for each unique type of instruction.  The
current PTX_LOGIC version is for 3-operand instructions.  A new multiclass
needs to be created for 2-operand logic instructions.


>
>  Thanks.
>
> Regards,
> chenwj
>
> --
> Wei-Ren Chen (陳韋任)
> Computer Systems Lab, Institute of Information Science,
> Academia Sinica, Taiwan (R.O.C.)
> Tel:886-2-2788-3799 #1667
>
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>



-- 

Thanks,

Justin Holewinski
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