I want to do right shift of 33 on a 32 variable and store the result into a float variable.
For suppose, the value is 1717986812. When we right shift by 33, we expect the value to be 0.2.
But when I do 1717986812 / (1<<33), I am getting some other huge integer value. I know that the result of 1<<33 can't be stored in a 32-bit value. So, I tried 17917986812 / (1UL<<33), but didn't get the correct results. I believe, something needs to be done regarding format conversions. But, couldn't figure it out.
For suppose, the value is 1717986812. When we right shift by 33, we expect the value to be 0.2.
Wait wait? No? Bit shifting is an integer activity, so a floating-point result to appear would be very magical. Shifting an integer right by more bits that the entire integer consists of, would "logically" result in 0, but in C it happens to be undefined.
If you want to divide a floating point value, just do so:
float x = 1717986812;
x /= powf(2, 33);
printf("got %g\n", x);
This printed 0.2 when I tested it online.