let a and b be the two numbers
int temp,result;
temp=a-b;
//if temp is -ve,then its MSB will be 1..else it ll be 0..so
temp=temp & (1<<31);
//now temp either holds 0(if temp is +ve) or a -ve no(if temp is -ve)
result=a - temp(a-b);
//now result contains the required value since a-(a-b)=b
printf("%d",result);
On Sat, Sep 17, 2011 at 7:03 PM, sivaviknesh s <[email protected]>wrote:
> Two registers A and B. Initial Contents of the registers are unknown.
> Write a program to find MAXINT - The maximum positive unsigned integer
> The instructions available are:
> SHR reg1, op1
> ADD reg1, op1
> AND reg1, op1
> NOT reg1.
> Op1 may represent any number or register.
> (Hint: The Shift operation is a logical shift, not arithmetic shift.)
>
> ..solution plz .. i tried but unable to arrive
>
> --
> Regards,
> $iva
>
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