ARM Cortex M architecture

Q5 Calculations Write a C function to calculate the equation y = 1000/x - (3*x+1)/4 assuming x and y are 32-bit numbers. Return y = 0X7FFFFFF (21-1) if the input value is zero, otherwise you can ignore overflow. The input parameter, x, is passed as a value in R0, and the return parameter, y, is returned in RO