[PATCH] Add LLVM support for remaining integer divide and permute instructions from ISA 2.06

[Nemanja Ivanovic]

Addressed comments from the previous review. Please note the resolution I've implemented for the comments about features that control these instructions. I felt that picking a characteristic instruction is also somewhat misleading (this patch is mostly divide instructions, but the next one will have more completely unrelated ones). So what I did instead is implement a feature that will enable all the features of a full ISA 2.06 implementation with -mattr=+isa-206 (subject to change if you would prefer a different string). The plan then is to do the same for ISA 2.07 in a later patch and if everyone agrees with this one.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D8406

Files:
  include/llvm/IR/IntrinsicsPowerPC.td
  lib/Target/PowerPC/PPC.td
  lib/Target/PowerPC/PPCInstr64Bit.td
  lib/Target/PowerPC/PPCInstrInfo.td
  lib/Target/PowerPC/PPCSubtarget.cpp
  lib/Target/PowerPC/PPCSubtarget.h
  lib/Target/PowerPC/README.txt
  test/CodeGen/PowerPC/div-e-32.ll
  test/CodeGen/PowerPC/div-e-all.ll
  test/MC/Disassembler/PowerPC/ppc64-encoding.txt
  test/MC/PowerPC/ppc64-encoding.s

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