proj4.mem (Project 4 Memory)
Michael Leonhard (mleonhar)
CS366 Fall 2005, Professor Khokhar
TA Mani Radhakrishnan
2005-11-15

Program Pseudocode
r2 <- address of parameters
r0 <- Mem[r2] multiplicand
r1 <- Mem[r2+1] multiplier
r3 <- 0 initialize counter
r2 <- 0 initialize result
LOOP
  if r1 == r3 goto DONE
  r3 <- r3 + 1 (increment counter)
  r2 <- r2 + r0 (add multiplicand to result)
  goto LOOP

DONE
r0 <- r2 (move result)
r2 <- address of parameters
Mem[r2+3] <- r0 (save result to memory)
halt

%

// initialize r2 to the address of the parameters
// LI r2 <- const8
0: 26
1: 000001 10

// load the multiplicand into r0
// LDM r0 <- Mem[r2 + 0]
2: 10 00 0000
3: 000111 00

// load the multiplier into r1
// LDM r1 <- Mem[r2 + 1]
4: 10 00 0001
5: 000111 01

// initialize counter r3 to 0
// LI r3 <- const8
6: 0
7: 000001 11

// initialize result r2 to 0
// LI r2 <- const8
8: 0
9: 000001 10

///////////////////////////////////////////////////////////////////////////////
// LOOP
///////////////////////////////////////////////////////////////////////////////

// check if counter has reached multiplier, jump out of loop
// BE if r1 == r3 then r7 <- r7 + 6
10: 01 11 0110
11: 000100 00

// increment counter
// ADDI r3 <- r3 + 1
12: 11 00 0001
13: 001011 11

// add the multiplicand to the result
// ADD r2 <- r2 + r0
14: 10 00 0000
15: 000011 10

// goto LOOP
// JI -8
16: 11111000
17: 000101 00

///////////////////////////////////////////////////////////////////////////////
// DONE
///////////////////////////////////////////////////////////////////////////////

// move result to r0
// MOVE r0 <- r2
18: 10 00 0000
19: 001100 00

// set r2 to the address of the parameters
// LI r2 <- const8
20: 26
21: 000001 10

// store the result from r0 to memory
// SWM r0 -> Mem[r2 + 2]
22: 10 00 0010
23: 001000 00

// HALT
24: 0
25: 000000 00

///////////////////////////////////////////////////////////////////////////////
// Data
///////////////////////////////////////////////////////////////////////////////

// Parameters
26: 11		// Multiplicand
27: 10		// Multiplier
28: 0		// Result

// end of proj4.mem