Write a machine language program

Question

Write a machine language program which takes integers as input and computes the product of integers entered. Your program should continue reading integers until user enters 0 (zero). 0 will act as a sentinel to indicate the end of input and it should not be included in the product computation.

Answer 1

Hey Irata! Here's a simple machine language program that computes the product of integers until the user enters 0 as a sentinel value. The program assumes a basic assembly-like pseudocode that can be translated into machine language for a hypothetical architecture.

Pseudocode Representation

assembly

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START:

SET product = 1 ; Initialize product to 1

SET input = 0 ; Initialize input

READ_INPUT:

INPUT input ; Read an integer from the user

IF input == 0 THEN ; Check for sentinel value

GOTO END ; If input is 0, go to end

product = product * input ; Multiply input with the product

GOTO READ_INPUT ; Repeat the input process

END:

OUTPUT product ; Output the final product

HALT ; End of the program

Explanation of the Program

1. Initialization: Set the initial product to 1 and prepare to read input.
2. Input Loop: Continuously read integers from the user until a 0 is entered.
3. Sentinel Check: If the input is 0, exit the loop and go to the end of the program.
4. Product Calculation: Multiply the current input with the running product.
5. Output: At the end, print the final product.

Example in Assembly-like Code

Here's a hypothetical assembly-like syntax for a specific architecture:

assembly

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ORG 0x00 ; Origin address

START:

MOV R1, #1 ; Initialize product in R1

MOV R2, #0 ; Initialize input in R2

READ_INPUT:

IN R2 ; Read integer from input

CMP R2, #0 ; Compare input with 0

BEQ END ; If input is 0, branch to END

MUL R1, R1, R2 ; Multiply product (R1) by input (R2)

JMP READ_INPUT ; Jump back to READ_INPUT

END:

OUT R1 ; Output the final product

HLT ; Halt the program

Explanation of the Assembly Code

1. ORG 0x00: Set the starting address for the program.
2. MOV R1, #1: Initialize register R1 to 1 (the product).
3. MOV R2, #0: Initialize register R2 to hold input values.
4. IN R2: Read an integer from input into R2.
5. CMP R2, #0: Compare the input with 0.
6. BEQ END: Branch to END if the input is 0.
7. MUL R1, R1, R2: Multiply the current product by the input value.
8. JMP READ_INPUT: Loop back to read the next input.
9. OUT R1: Output the final product.
10. HLT: End the program.

Let me know if you need further help with understanding it!

Best,

Andrew