Chapter 3.6, Problem 3.30PP

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:

1. A.    What were the values of the case labels in the switch statement?
2. B. What cases had multiple labels in the C code?