Most functions operate on values passed to them as parameters, also called arguments. Many functions also return a value. Consider this function:

long sum$3($long a$,$ long b$,$ long c$)$

$\{$

return a $+$ b $+$ c;

$\}$

sum$()$ takes three long parameters and returns the sum of them as its value. The x$86-64$ passes the first six integral and pointer arguments in registers as follows:

Argument Number Register

$1\%$rdi

$2\%$rsi

$3\%$rdx

$4\%$rcx

$5\%$r$8$

$6\%$r$9$

It$$s rare for a function to have more than three or four arguments, but if there are more than six arguments, the remainder are pushed on the stack.

sum$3()$ is called as follows:

s $=$ sum$3(14,87,122)$;

What register will hold each of the input values on entry?

Drag the correct label $($value or register$)$ to complete each sentence. Not all labels will be used