The instruction of MMX that is essential when a floating-point routine calls an MMX routine or viceversa is
A. MOV
B. PADD
C. EMMS
D. none of the mentioned
Answer:A
The instruction of MMX that is essential when a floating-point routine calls an MMX routine or viceversa is
A. MOV B. PADD C. EMMS D. none of the mentioned
Explanation: The EMMS instruction is imperative when a floating point routine calls an MMX routine or vice-versa. If we do not use EMMS at the end of MMX routine, subsequent floating-point instructions will produce erratic results.