Question
Suppose we want to generate assembly code for the following C function: int shift_left2_rightn(int x, int n){ x < >= n; return x; } The
Suppose we want to generate assembly code for the following C function:
int shift_left2_rightn(int x, int n){
x<<= 2;
x>>= n;
return x;
}
The code that follows is a portion of the assembly code that performs the actual shifts and leaves the final value in register %eax. Two key instructions have been omitted. Parameters x and n are stored at memory location with offsets 8 and 12, respectively, relative to the adress in register %eb
1. movl 8(%ebp), %eax Get x
2. _____ x <<=2
3. movl 12(%ebp), %ecx Get n
4. _____ x>>=n
Fill in the missing instructions, following the annotations on the right. The right shift should be performed arithmetically.
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A First Course In Probability
Authors: Sheldon Ross
9th Edition
978-9332519077, 9332519072
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