[llvm-dev] FIXED POINT NOTATION

[Chris Lattner via llvm-dev]

> On Nov 10, 2015, at 1:54 PM, Fabio Gritti via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> Hi, we are trying to implement in the LLVM framework the fixed point notation as specified in the ISO/IEC TR 18037 (http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf <http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf> ).
>  
> We've read some old discussions on the mailing list ( f.i. http://lists.cs.uiuc.edu/pipermail/llvmdev/2010-November/036674.html <http://lists.cs.uiuc.edu/pipermail/llvmdev/2010-November/036674.html> , http://lists.llvm.org/pipermail/llvm-dev/2013-December/068473.html <http://lists.llvm.org/pipermail/llvm-dev/2013-December/068473.html> ), and it seems that some people don't agree on their implementation as a completely new type. 
> Do you think that today it is worth to implement them or not? Are there anybody working on this? 
> 
> If nobody is already working on this,  and the dev community think that it can be a good idea we have a couple of questions: 
> 
> 1- we are following this main guidelines ( http://llvm.org/docs/ExtendingLLVM.html <http://llvm.org/docs/ExtendingLLVM.html> ) in order to add a new type, do you think that it's better a fundamental type or a derived one? 
> 
> 2- Do you have any advice or additional tutorial to suggest in order to implement a new data type?

Hi Fabio,

I’d suggest bringing this up on the cfe-dev mailing list, since this is likely to be a pure clang extension and have little impact on LLVM itself (at least in the short term, it is possible that LLVM extensions will eventually be interesting to improve the implementation).

-Chris


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