Intermediate
Assembly Language
Q78 / 100
What is the Direction Flag (DF) used for?
Correct! Well done.
Incorrect.
The correct answer is B) Controlling whether string instructions auto-increment (DF=0, CLD) or auto-decrement (DF=1, STD) the ESI/EDI pointers
B
Correct Answer
Controlling whether string instructions auto-increment (DF=0, CLD) or auto-decrement (DF=1, STD) the ESI/EDI pointers
Explanation
CLD clears DF (forward direction, increment). STD sets DF (backward direction, decrement). The ABI requires DF to be 0 at function calls.
Progress
78/100