divide two integers

//from fish in water, similar to codeganker

 int divide(int dividend, int divisor) {      
       unsigned long dvd = dividend < 0 ? -dividend : dividend; 
       unsigned long dvs = divisor < 0 ? -divisor : divisor; 
       if (dvd < dvs) return 0; 
       int sign = 1; 
       if (dividend < 0) sign *= -1; 
       if (divisor <0) sign *= -1; 
       unsigned long absDivisor = dvs; 
       int step = 0; 
       while (dvs < dvd) 
       { 
            dvs = dvs << 1; 
            step++; 
       } 
       int result = 0; 
       while (dvd >= absDivisor) 
       { 
            if (dvd >= dvs) 
            { 
                 dvd -= dvs; 
                 result += 1 << step; 
            } 
            dvs = dvs >> 1; 
            step--; 
       } 
       return result * sign; 
  }