JSRR instruction
时间: 2023-08-06 10:05:46 浏览: 107
The JSRR (Jump to Subroutine Register) instruction is a type of instruction in the LC-3 (Little Computer 3) assembly language. It is used to call a subroutine that is located at an address stored in a register.
The format of the JSRR instruction is:
```
JSRR BaseR
```
where `BaseR` is the register containing the address of the subroutine.
When the JSRR instruction is executed, the address of the next instruction (the return address) is pushed onto the stack, and the program counter (PC) is set to the address contained in `BaseR`.
The subroutine can then be executed, and when it is finished, it can return to the main program by using the `RET` (return from subroutine) instruction, which pops the return address off the stack and sets the PC to that address.
The JSRR instruction is useful for modularizing code and reducing code duplication by allowing the same code to be reused in multiple places.