Question

1. If EAX was 1011 1100 0001 1010 1011 1100 1010 0011

Using shift and AND how could you change it to 0000 0000 0001 1010 1011 1100 ?
2.What are the commands to add x + y + z into eax, if X is a dword, y is a word, and z is byte What is the command to print the answer?

Answer 1

To modify EAX to the desired value, use right-shifting followed by an AND operation with a mask. Adding X, Y, and Z into EAX involves using ADD instructions. Printing the result requires an operating system service call.

Step-by-step explanation:

To change EAX from 1011 1100 0001 1010 1011 1100 1010 0011 to 0000 0000 0001 1010 1011 1100, you can use a combination of shift and AND operations. First, shift the register to the right by 16 bits to remove the upper half, then use an AND with a mask value to clear any unwanted bits.

The commands in Assembly to add X (a dword), Y (a word), and Z (a byte) into EAX would depend on the specific Assembly language used, but generally, you would move or load the values into registers and use the ADD instruction. To print the answer, there is no direct print command in Assembly; you would need to invoke an operating system service (like int 0x80 on Linux or a Windows API call) for output.