[LLVMdev] Bi-Endian Compiler (original) (raw)

Herbie Robinson HerbieRobinson at verizon.net
Thu Jul 30 10:15:22 PDT 2015

I have been quietly working on a port of LLVM to Stratus VOS. The OS is always big endian (because customers need to migrate data to new hardware quickly and can't afford to convert). This entails presenting a big endian programming model no matter what the hardware does. We did this about 15 years ago with the Stratus compilers and GCC. We offered the GCC changes back to the community, but the GCC folks declined to take them...

In my copious spare time, I've already written (but not debugged) an LLVM pass that reverses the endianess of the underlying processor. The LLVM IR is actually quite good for this. Believe it or not, the hard part is actually dealing with initialization!

I am leaving on vacation as soon as my GPS maps get updated; so, I don't have time to read your paper, now. I will look at it when I get back.
Perhaps we can collaborate. If nothing else, I participated peripherally in the Stratus implementation. I would like to say a lot more, but I need to hit the road...

On 7/30/15 4:36 AM, Umesh Kalappa wrote:

Hi Guys,

We are trying to come up with Bi-Endian(neutral endiness) compiler using the LLVM. For a introduction . http://www.drdobbs.com/architecture-and-design/writing-a-bi-endian-compiler/240003090 Did someone from the group ,aware of such project .

Thank you ~Umesh

LLVM Developers mailing list LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

More information about the llvm-dev mailing list