[LLVMdev] Implementing the ARM NEON Intrinsics for PowerPC

[Stanislav Manilov]

Hello Hal,

I am not very familiar with the DSP capabilities of PowerPC, but I imagine
there will be instructions for simple vector operations like vector
addition, multiplication, etc. so for these I imagine the implementation
would consist of just outputting the correct instruction. However, for NEON
instructions like the reciprocal step (see
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0489c/CIHDIACI.html)
it
is unlikely that there is a corresponding PowerPC vector instruction, so
these will need to be emulated, yes.

 - Stan


On 2 October 2013 04:14, Hal Finkel <hfinkel at anl.gov> wrote:

> Stan,
>
> Do you mean that you want to emulate the ARM NEON intrinsics on PowerPC?
>
>  -Hal
>
> ----- Original Message -----
> >
> >
> > Hello LLVM Devs,
> >
> >
> > Thanks for helping me previously to cross-compile for ARM, I managed
> > to get a working toolchain and am currently having fun compiling
> > different toy problems and running them on a pandaboard.
> >
> > As part of my research I am trying to implement the ARM NEON
> > Intrinsics in the PowerPC LLVM backend. I am still at the beginning
> > of my efforts and am not yet familiar with either the ARM or the
> > PowerPC backends. After I started investigating the code and found
> > out that in total it is more than 100 kloc for the two backends I
> > thought it is a good idea to ask you for some hints of where I
> > should start from.
> >
> > I have written a small unrelated experimental backend for LLVM
> > before, so I have some experience with the topic.
> >
> >
> > Thanks,
> > - Stan
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >
>
> --
> Hal Finkel
> Assistant Computational Scientist
> Leadership Computing Facility
> Argonne National Laboratory
>
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