Question

Assembly Programming

Write a program that uses only PUSH and POP instructions to
exchange the values in the EAX and EBX registers. Store values into
the EAX and EBX registers.

Answer 1

The question requires writing an assembly program to exchange values of the EAX and EBX registers using only PUSH and POP instructions. The suggested code pushes the original values onto the stack and pops them back in the opposite order to swap them.

Step-by-step explanation:

The student is asking how to write an assembly program that exchanges the values of the EAX and EBX registers using only PUSH and POP instructions. An example solution in assembly language would look like this:

; Assume EAX and EBX have been already filled with values
PUSH EAX ; Push the value of EAX onto the stack
PUSH EBX ; Push the value of EBX onto the stack
POP EAX ; Pop the value from the stack into EAX
POP EBX ; Pop the next value from the stack into EBX

This sequence of instructions pushes the original values of EAX and EBX onto the stack and then pops them in reverse order, effectively exchanging their values.