Function reverse_string

compute/example/fizz_buzz.cpp:68–77

reverse the string [start, end).

    // reverse the string [start, end).
    inline void reverse_string(__global char *start, __global char *end)
    {
        while(start < end){
          char tmp = *end;
          *end = *start;
          *start = tmp;
          start++;
          end--;
        }
    }

    // second-pass kernel which copies the fizz-buzz string for each number to
    // buffer using the previously calculated offsets.