2 ms·

How so?

• ncmncm 5y ago
  It means that, at the ISA level, only one status can be considered live at any instruction address. If you will need it later, but need to generate another status result, you have to copy the old value somewhere. This is much like in x32, where you had only one visible named AX register, and had to spill its value if you needed it for something else.