Don't let the upper bits of %dr6/%dr7 get set.
Don't let the upper bits of %dr6/%dr7 get set.

Submitted by:  Nate Eldredge <neldredge@math.ucsd.edu>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase