Question

What value is written to the stack during the MEM stage for a call instruction?

a)valE
b)valB
c)valP
d)valM
e)valA
f)valC

Answer 1

The value written to the stack during the MEM stage for a call instruction is the value of the program counter (valP).

Step-by-step explanation:

The value written to the stack during the MEM stage for a call instruction is the value of the program counter (valP). During the execution of a call instruction, the program counter (PC) is pushed onto the stack. This allows the processor to later return to the correct location in the program after executing the called subroutine.

For example, if the program counter is 0x1000 and a call instruction is encountered at that address, the value 0x1000 would be written to the stack in the MEM stage of the pipeline.