Rpn procedure, Computer Engineering

Apply this algorithm to your MASM program

1) Declare the following variables in your data segment:

.data

;

; These are the values of the variables

;

Variables               DWORD         17                                            ; A

DWORD         12                                            ; B

DWORD         4                                              ; C

DWORD         10                                            ; D

DWORD         5                                              ; E

;

; This is the expression to evaluate . . .

;

Expression BYTE              "AB-C*DE-/"                                      ; expression to evaluate

2) Create two procedures.  The first procedure should be the RPN calculator and is called from your main program procedure.  The parameters you pass to the RPN procedure from the main program are:

a) The address of the source RPN string.

b) The address of your variables list.

c) The length of our source RPN string.

You may choose any registers to use for passing parameters. The RPN procedure returns the calculated result in the EAX register. The RPN procedure must use the stack as discussed in Chapter 5 to compute the result.

3) The second procedure is called from your RPN procedure.  It determines if the character the RPN procedure is looking at is a variable or operator.  The parameters you pass to the second procedure are:

a) The character being examined.

b) Return code in EAX.  Zero if a variable, one if an operator.

4) Both procedures should be called using the CALL instruction ONLY.

5) When processing the RPN expression, your variable references should map to the variables array.  In other words, your program logic should locate the first DWORD value in the variables list from the letter "A", the second DWORD value from the variable "B", and so on.  You CANNOT hardcode numeric values in the RPN string!

6) Create a second set of variables and an associated RPN string of your choosing.  The second set must consist of AT LEAST four variables.  I can provide examples if you need them.

7) Run your program ONCE with both sets of variables and RPN strings.  Your main program should call the RPN procedure once with the first string, then a second time immediately thereafter with the second string.  Save both results in your data segment.

8) Your main program and all procedures should be in the same .asm file.

9) Submit the following for grading:

a) Your source code (softcopy).

b) A listing of your source code and a memory dump showing the results of both calls to the RPN procedure.

Posted Date: 2/25/2013 1:58:02 AM | Location : United States







Related Discussions:- Rpn procedure, Assignment Help, Ask Question on Rpn procedure, Get Answer, Expert's Help, Rpn procedure Discussions

Write discussion on Rpn procedure
Your posts are moderated
Related Questions
DNS cache snooping is not a term the author just made up, it is called and discussed by some notable DNS execution developers, and a few interested DNS administrators have prob

Q. FORALL Statement in fortran? The FORALL statement permits for more common assignments to sections of an array. A FORALL statement has general form.   FORALL ( triplet, ..

Q. Structure of Input - Output Interface? Due to complexity and number of external devices that I/O interface control, there is not any standard structure of I/O interface. Let

What are coupling and cohesion and why are they important concepts in software design?

Define clock rate? The clock rate is given by, R=1/P, where P is the length of single clock cycle.

program to find area under the curve y=f(x) between x=a and y=b , integrate y=f(x)between limits of a and b

Q. Show typical microprocessor system architecture? A microprocessor system bus consists of three physical buses: the address bus, the data bus, and the control bus. The types

Explain 100 line exchange with selector finder. Design: In place of 100 two-motion selectors as in the case of Design 3, suppose we consider only 24 two-motion selectors. Whe

What are the features of Client/Server Computing? Although there are several different configurations, different hardware and software platforms and even dissimilar network pro

Optimality - Heuristic search strategies: The path cost of a solution is considered as the sum of the costs of the actions that led to which solution is given. This is only on