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Practice Problem 3.30 (solution page 338)
In the C function that follows, we have omitted the body of the switch statement. In the C code, the case labels 'did not span a contiguous range, and some cases had multiple labels.
void switch2(long x, long *dest) {
long val = 0;
switch (x)t {
.
. Body of switch statement omitted
.
}
*dest = val;
}
In compiling the function, GCC generates the assembly code that follows for the initial part of the procedure, with variable x in %rdi:
It generates the following code for the jump table:
Based on this information, answer the following questions:
- A. What were the values of the case labels in the switch statement?
- B. What cases had multiple labels in the C code?
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EBK COMPUTER SYSTEMS
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