[gbdk-users] INT32 not supported?

[Babak A. <ba...@ho...>]

Hi all,

I'm having major problems with INT32 vars. It all started when I realized I 
wasn't getting accurate results with division of INT32 vars. So I wrote the 
following snippet to try and isolate the problem and found the following 
results so far:

This function, div, divides nNumA by nNumB by bit-shifting:

INT32 div(INT32 nNumA, INT32 nNumB)
{
   INT32 nTemp;
   /* No division by zero! */
   if (nNumB != 0)
     nTemp = nNumA >> nNumB;

   return nTemp;
}

void main()
{
  INT32 x;  /*The if statement only works when x is declared INT16 */

  x = div(10, 2);
  if (x == (INT32)(10 >> 2) )
     gprintf("equal.");
  else
       gprintf("not equal.");
}

In main() I just use the function to divide 10 by 2 and store the result in 
x. Then I do a comparison with the result and the equivilent shift in the IF 
statement.

In the above code it'll always result in "not equal" but if I use INT16 
it'll be okay. Furthermore various combinations of INT16 and INT32 in 
function div and main work fine as long as x is ALWAYS declared as INT16, 
BUT if I ever declare x in main() as INT32 the comparison in the IF 
statement fails.

Sorry if this all sounds confusing but anyone have any insight?

Tnx,
Babak.

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