ASSIGNMENT FOR SPIM LEVEL 2 AND 3
			    ---------------------------------
	
4. Level 2 :: Run the following code for the given spim machine descriptions.
		int i=2,k=3;
		int main()
			{
			int a=7;			 
			return (i+k*a);
			} 

	      Why does the compilation fail?How do you rectify this?

5. Level 2 :: Modify pattern addsi to use define_expand. 
              Also try to use define_split.Justify your observations.

6. Level 3 :: Manipulate the stack layout information by changing the values of the required macros. 
              Try all the possible combinations for the following information :
			a. Stack grows downward
			b. Frame grows downward
	      Observe the changes in the generated spim file and try to justify.
	      (Hint :: Modification is in spim3.h file)

7. Level 3 :: This level supports function calls for integer as return type. 
              Support floating point return type.