Feature #8: Divide in Power Save Mode

Description

When people want to use mobile devices for a long duration and require basic functionality like audio calls and text messages, then the power-save mode is of great help. A drawback of power-save mode is that it disables power-hungry features, which the user may sometimes need. Therefore, we want our compiler to generate an adaptive code that behaves differently under different battery conditions. When the device is in power-save mode, it generates code that will adapt to conditions. An example of an operation that is disabled in power-save mode is integer division.

Let’s see the following illustration to get an idea of the divide function:

Solution

We will implement the divide() function, which takes two inputs: the dividend and the divisor. Over here, we will assume the constraint that the divisor will not be 0.

Let’s discuss how we will implement this method:

1. First, the function will check if the given dividend equals the minimum possible number and that the divisor equals -1. Then, it will return the maximum possible number, the max_int variable.

2. If either value (dividend or divisor) is positive, we’ll convert it to negative by multiplying it with -1. This will help us avoid negative number overflow. In the end, we can adjust the sign of the result.

3. Now, we can pick increasing multiples of the divisor until we get the smallest integer that is greater than the dividend. However, this is a slow process. Instead of this, ...