[LLVMdev] Predication on SIMD architectures and LLVM

Marcello Maggioni marcello at codeplay.com
Fri Oct 19 10:09:40 PDT 2012

On 10/19/2012 5:12 PM, 陳韋任 (Wei-Ren Chen) wrote:
> Hi Marcello,
> On Fri, Oct 19, 2012 at 04:38:29PM +0100, Marcello Maggioni wrote:
>> Hello,
>> I'm working on a compiler based on LLVM for a SIMD architecture that
>> supports instruction predication. We would like to implement branching
>> on this architecture using predication.
>> As you know the LLVM-IR doesn't support instruction predication, so I'm
>> not exactly sure on what is the best way to implement it.
>> We came up with some ways to do it in LLVM:
>    I recall Ocelot [1], a binary translator which translates PTX into LLVM
> also faces the same problem. You might want to take a look on what
> Ocelot does.
> HTH,
> chenwj
> [1] http://www.gdiamos.net/papers/ocelot-pact.pdf
Hi Wen-Ren,

thank you for your link, seems like an interesting read on the argument!


Marcello Maggioni
Codeplay Software Ltd
45 York Place, Edinburgh, EH1 3HP
Tel: 0131 466 0503
Fax: 0131 557 6600
Website: http://www.codeplay.com
Twitter: https://twitter.com/codeplaysoft

This email and any attachments may contain confidential and /or privileged information and is for use by the addressee only. If you are not the intended recipient, please notify Codeplay Software Ltd immediately and delete the message from your computer. You may not copy or forward it,or use or disclose its contents to any other person. Any views or other information in this message which do not relate to our business are not authorized by Codeplay software Ltd, nor does this message form part of any contract unless so stated.
As internet communications are capable of data corruption Codeplay Software Ltd does not accept any responsibility for any changes made to this message after it was sent. Please note that Codeplay Software Ltd does not accept any liability or responsibility for viruses and it is your responsibility to scan any attachments.
Company registered in England and Wales, number: 04567874
Registered office: 81 Linkfield Street, Redhill RH1 6BY

More information about the llvm-dev mailing list