R0                 97 nanojit/NativeARM.h R0  = 0,
R0                129 nanojit/NativeARM.h FirstReg = R0,
R0                 89 nanojit/NativePPC.h R0  = 0, // scratch or the value 0, excluded from regalloc
R0                163 nanojit/NativePPC.h FirstReg = R0,