MOVSXDR           936 nanojit/NativeX64.cpp             MOVSXDR(r, r);
MOVSXDR           964 nanojit/NativeX64.cpp                 MOVSXDR(r, r);
MOVSXDR           983 nanojit/NativeX64.cpp             MOVSXDR(rr, ra);    // sign extend 32->64
MOVSXDR           463 nanojit/NativeX64.h         void MOVSXDR(Register l, Register r);\