Implement support for MMX movd instruction generation.

Based on http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20150202/257325.html
and http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20121029/154639.html

Change-Id: I098654245c06a975b8b0bc66e0feb5acea0e9c89
Reviewed-on: https://swiftshader-review.googlesource.com/4510
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
9 files changed