3.58 For a function with prototype long decode2(long x, long y, long z); Gcc generates the following assembly code: 1decode2: subq imul4 movq salg sarq xorg ret %rdx, %rsi %rsi, %rdi %rsi, %rax $63,%rax $63,%rax %rdi ,%rax Parameters x, y, and z are passed in registers %rdi, %rsi, and %rax. 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