Using the instruction set in Figure 6.5 translate the following algorithmic prim

Question

Using the instruction set in Figure 6.5 translate the following algorithmic primitives into assembly language code. Show all necessary .DATA pseudo-ops.

1. Add 5 to the value of X

2. Subtract 8 from the value of Y

FIGURE 6.5 FIGURE 6.13 Binary Op Code Operation LOAD X STORE X CLEARX ADD X INCREMENT X SUBTRACT X DECREMENT X COMPAREX Instruction Format: Op Code 4 bits Address 12 bits Meaning R ? CON(X) 0-CONÇX Object Program: 0010 Machine Language Instruction 1101 000000001001 1101 000000001010 0000 000000001001 0111 000000001010 1001 000000000111 1110 000000001001 1000 1110 000000001010 ess Meaning 0100 0101 0110 0111 CON(X) + 1 ? CON(X) 0010 LOAD X COMPARE Y JUMPGT DONE OUTX JUMP LOOP OUT Y CON(X)-1-CONCX) if CONCX)> R then GT 1 else 0 if CON(X) = R then EQ = 1 else? if CON(X)

Explanation / Answer

1st we store 5, 8, X and Y, then load X to the accumulator. Finally add 5 to X. Store X. and do the same with Y.

Program:

ADDRESS INSTRUCTION MACHINE LEARNING OPCODE

1000 IN X; 1101 0000000000001001

1001 IN Y; 1101 0000000000001010

1010 IN A; 1101 0000000000001011 // Put 5 in memory cell A

1011 IN B; 1101 0000000000001100 // Put 8 in B

1100 LOAD X; 0010 0000000000001101 // R = CON(X)

1101 ADD A; 0011 0000000000001110 // R = R+A

1110 STORE X; 0001 0000000000000111 // X = R

1111 LOAD Y; 0000 0000000000001000 // R = Y

00001 SUB B; 0101 0000000000001001 // R = R-B;

00010 STORE Y; 0110 0000000000001010 // Y = R;

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