6 void initArchitecture(int stackSize, int regsCount);
16 /* The stack **WHILE IN A USER PROCEDURE**:
18 | fp | - the old fp (before this application)
19 | ret | - return address
20 | env | - points to the enviroment vector
21 | n | - number of arguments
25 ST_FRMEND -> | An-1 | - argument n-1
27 Note: ST_FRMEND points to the end of the current actvation frame (in fact,
28 to the last element: An-1). Note that ST_FRMEND does not have to be
29 equal to [the old fp + 1] (in case we are in the middle of an
30 application and already pushed some arguments onto the stack).
32 Note: sp does NOT have to be equal to fp - for example if we are in the
33 middle of applying a procedure and already pushed some arguments
34 on to the stack (then sp has changed, but fp has not).
36 Macros for user procedures:
38 #define ST_ARG(n) (stack[fp-5-(n)])
39 #define ST_ARG_COUNT() (stack[fp-4])
40 #define ST_OLDFP() (stack[fp-1])
41 #define ST_RET() (stack[fp-2])
42 #define ST_ENV() (stack[fp-3])
43 #define ST_FRMEND() (fp-4-stack[fp-4])
44 #define RETURN() goto *pop()
46 /* General Purpose Registers */