Problem 4 (25 points) Following is the code for a mysterious function. The input

Question

Problem 4 (25 points) Following is the code for a mysterious function. The input au p is a pointer to the apicore class and the external input of the GPl core is connected to slide switches. The function can be called repeatedly in the main progran uint32 t mysterious (Gpicore sw p) static uint 32t -0 uint32 t t, E2: tl -sw p-read) if (s1) else f t2-t1 is bitwise xor operation s-tli return(t2) Provide a short description on the purpose of this function (maximal three sentences). No point will be given for "just stating the obvious," such as "if s is equal to tl, the function returns 0." .GPI -For slide suitoheJ' ond we ave domg bitwise SW-P- address retun ualue as :pit Uns,gm@ in Gpi core :read) return (io read (base addryA return Io-Yea

Explanation / Answer

sw_p is pointer to GpiCore class and we are calling GpiCore class funtion read from it.
If there is not place to read then it return 0 and initialze t1 as zero and t2 is also zero.
If there is place to read then it initiaze t1 with some value and go to else loop where it assign t2 as same as t1, As xor with zero(s) is that number only.

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