RSP              1346 nanojit/NativeX64.cpp         MR(RSP,FP);
RSP              1515 nanojit/NativeX64.cpp                         (GpRegs & ~(1<<RSP | 1<<RBP | 1<<RSI | 1<<RDI)) :
RSP              1691 nanojit/NativeX64.cpp                 SUBQR8(RSP, amt);
RSP              1693 nanojit/NativeX64.cpp                 SUBQRI(RSP, amt);
RSP              1698 nanojit/NativeX64.cpp         MR(FP, RSP);    // Establish our own FP.
RSP              1718 nanojit/NativeX64.cpp         a.free = 0xffffffff & ~(1<<RSP | 1<<RBP);
RSP              1790 nanojit/NativeX64.cpp         MR(RSP, RBP);