CLRLDI            778 nanojit/NativePPC.cpp                 CLRLDI(r, r, 32);
CLRLDI           1009 nanojit/NativePPC.cpp         CLRLDI(v, v, 32); // zero-extend destructively
CLRLDI           1031 nanojit/NativePPC.cpp             CLRLDI(r, v, 32); // clears the top 32 bits