3.58

For a function with prototype

long decode2(long x, long y, long z);

ace generates the'tollowing assembly code:

1 decode2:

2 subq %rdx , %rsi

3 imulq %rsi, %rdi

4 movq %rsi, %rax

5 salq $63, %rax

6 sarq $63, %rax

7 xorq %rdi, %rax

8 ret

Parameters x, y, and z are passed in registers %rdi, %rsi, and %rdx. The code stores the return value in register %rax. Write C code for decode2 that will have an effect equivalent to the assembly code shown.

Please submit decode2.c file that includes your C code and also decode2.s file that was the assembly code generated by gcc command.