1a. Consider the following assembly code for two C functions. double f1 (double a, double b, double c, double d); f1: addsd8xmm3, %xmm1 movapd %xmm1, %xmm9 ret double f2 (double a, double b, double c, double d); F2: addsd %xmm1, %xmm2 Ret Which of the above function can do faster? A. f1 is faster when the target processor has more than 1 FP Add unit. B. f2 is faster when the target processor has more than 1 FP Add unit. C. Neither, both are equally fast. D. f1 always faster regardless of the target processor E. f2 always faster regardless of the target processor