[Power9]Legalize and emit code for quad-precision convert from double-precision

Legalize and emit code for quad-precision floating point operation xscvdpqp
and add option to guard the quad precision operation support.

Differential Revision: https://reviews.llvm.org/D44746

llvm-svn: 328558
3 files changed
tree: 43d5ba79352586311784f2754397652923654b31
  1. clang/
  2. clang-tools-extra/
  3. compiler-rt/
  4. debuginfo-tests/
  5. libclc/
  6. libcxx/
  7. libcxxabi/
  8. libunwind/
  9. lld/
  10. lldb/
  11. llgo/
  12. llvm/
  13. openmp/
  14. parallel-libs/
  15. polly/
  16. README.md
README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.