[llvm-dev] TableGen - Help to implement a form of gather/scatter operations for Mips MSA

[Alex Susu via llvm-dev]

   Hello.
     I read on page 4 of http://www.cs.fsu.edu/~whalley/cda5155/chap4.pdf that gather and 
scatter operations exist for Mips, named LVI and SVI, respectively.

     Did anyone think of implementing in the LLVM Mips back end (part of the MSA vector 
instructions) gather and scatter operations?
     If so, can you share with me the TableGen spec? (I tried to start from LD_DESC_BASE, 
but it doesn't seem to be trivial. Also, LLVM seems to have implemented scatter/gather 
instructions only for the x86 processor - there, they defined new SDNodes called 
GatherNode and ScatterNode.)

   Thank you,
     Alex