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algorithm for 32bit division in c

damodar naidu

I got below code form forum For multiplication of 24bit*8bit,the result which is a 32bit value has to be divided by 32bit constant,but i don't know algorithm used here for 32bit division so pls help me with algoritm
unsigned long s, e, w, k;

s = 0x000F4240;
k = 0;
e = read_val1;
e = (e << 8) | read_val2;
e = (e << 8) | read_val3;
e *= 0x10;

do {

w = e - s;

if (w < 0)

goto endit;

s >>= 1; : :
} while ((s & 0x80000000) == 0);
: :
endit:

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