llvm dev - Sep 2011 - [LLVMdev] PTX backend do not support sitofp instruction?

Hi all,

Does PTX backend support llvm sitofp instruction?

I failed to compile my llvm source when use llc -march=ptx32.
The reason is that the source has a sitofp instruction.
After i changed the instruction into uitofp manually, it passed.


Thanks in advance,

best,
Yabin
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20110926/be6406e1/attachment.html>

> Does PTX backend support llvm sitofp instruction?
  Seems it doesn't support sitofp, search "Conversion
to f32" in PTXInstrInfo.td.

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

On 09/26/11 12:11, 陳韋任 wrote:
>> Does PTX backend support llvm sitofp instruction?
>
>    Seems it doesn't support sitofp, search "Conversion
> to f32" in PTXInstrInfo.td.
IIRC, LegalizeDAG has some code to implement sitofp in terms of
uitofp (or maybe uitofp in terms of sitofp, I don't recall).

Ciao, Duncan.

On Sun, Sep 25, 2011 at 11:39 PM, Yabin Hu <yabin.hwu at gmail.com> wrote:
> Hi all,
>
> Does PTX backend support llvm sitofp instruction?
>
Type conversion has not received much love yet.  If you send me a test case,
I'll try to create a fix.

>
> I failed to compile my llvm source when use llc -march=ptx32.
> The reason is that the source has a sitofp instruction.
> After i changed the instruction into uitofp manually, it passed.
>
>
> Thanks in advance,
>
> best,
> Yabin
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>

-- 

Thanks,

Justin Holewinski
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20110926/fe4b0d5d/attachment.html>