[LLVMdev] TargetDescription string documentation

[John Criswell]

Paulo J. Matos wrote:
> Hello,
>
> I am trying to find out where the complete documentation for the
> TargetDescription string documentation is.
> I am reading the tutorial and looking at the sparc backend at the same
> time and there are some discrepancies. Therefore the documentation
> would be extremely valuable but I can't seem to find it.
>
> In the tutorial it shows the string "E-p:32:32-f128:128:128",
> but the real sparc backend has
> "E-p:32:32:32-i16:16:16-f32:32:32-f128:64:64-n32".
>
> The tutorial doesn't explain what the 'n' stands for, or why 'f' shows
> up twice (I can guess the first might be for floats and the second for
> doubles, but the tutorial has a different story about doubles.
>
> Here's where I am reading it from:
> http://llvm.org/docs/WritingAnLLVMBackend.html
>
> I would be grateful for any explanation or pointers to documentation.
>
> Cheers,
>   

I believe what you want is documented here:

http://llvm.org/docs/LangRef.html#datalayout

-- John T.