Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
To solve this problem, we can write an assembly language program based on the provided instruction set that calculates and stores the first 20 prime numbers in memory locations 0 to 19. The algorithm to find prime numbers that we will use is simple: 1. Start with the first prime number, 2. 2. For each number, check if it is prime by dividing it with all numbers less than itself and greater than 1. 3. If the number is prime, store it in the next available memory location. 4. Repeat until we have stored 20 prime numbers. Here's how such a program might look:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | SET R1 2 ; R1 will hold our current number to check if it is prime SET R2 0 ; R2 will hold the count of prime numbers found SET R3 1 ; R3 is used as a constant to increment numbers SET R4 2 ; R4 holds the divisor for prime checking check_prime: EQ R5 R4 R1 ; Check if divisor (R4) equals the current number (R1) JT R5 is_prime ; If so, the number is prime MOD R6 R1 R4 ; R6 = R1 % R4, check if R1 divisible by R4 EQ R7 R6 0 ; Check if R6 equals 0 (not a prime if true) JF R7 continue_div_check ; If R6 is not 0, continue checking INC R4 ; Increment divisor for next check JMP check_prime ; Repeat prime check process continue_div_check: INC R4 ; Increment divisor LT R8 R4 R1 ; Check if divisor is less than the number JT R8 check_prime ; If so, continue checking is_prime: STORE R1 R2 ; Store the prime number in memory at location R2 INC R2 ; Increment the memory location for the next prime EQ R9 R2 20 ; Check if we've found 20 primes JT R9 end ; If so, end the program SET R4 2 ; Reset divisor to 2 for next number INC R1 ; Increment the number to check next JMP check_prime ; Go back to check if the new number is prime end: HCF ; Halts the program |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | SET R1 2 ; R1 will hold our current number to check if it is prime SET R2 0 ; R2 will hold the count of prime numbers found SET R3 1 ; R3 is used as a constant to increment numbers SET R4 2 ; R4 holds the divisor for prime checking check_prime: EQ R5 R4 R1 ; Check if divisor (R4) equals the current number (R1) JT R5 is_prime ; If so, the number is prime MOD R6 R1 R4 ; R6 = R1 % R4, check if R1 divisible by R4 EQ R7 R6 0 ; Check if R6 equals 0 (not a prime if true) JF R7 continue_div_check ; If R6 is not 0, continue checking INC R4 ; Increment divisor for next check JMP check_prime ; Repeat prime check process continue_div_check: INC R4 ; Increment divisor LT R8 R4 R1 ; Check if divisor is less than the number JT R8 check_prime ; If so, continue checking is_prime: STORE R1 R2 ; Store the prime number in memory at location R2 INC R2 ; Increment the memory location for the next prime EQ R9 R2 20 ; Check if we've found 20 primes JT R9 end ; If so, end the program SET R4 2 ; Reset divisor to 2 for next number INC R1 ; Increment the number to check next JMP check_prime ; Go back to check if the new number is prime end: HCF ; Halts the program |
Resulting in output: False
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
To solve this task, we will write an assembly program that calculates prime numbers and stores the first 20 of them into memory cells 0 to 19. This program will use a combination of loops and conditionals to find prime numbers and will rely on basic arithmetic and comparison operations available in the described assembly language. Here's a high-level overview of the algorithm before diving into the assembly code: 1. Initialize a counter for prime numbers found (starting at 0). 2. Start with the first number to check for primality (2, the smallest prime number). 3. For each number, check if it is prime by attempting to divide it by all smaller numbers (starting from 2 up to the number itself minus one). 4. If a number is found to be prime (no divisors found), store it in the next available memory cell and increment the prime counter. 5. If the prime counter reaches 20, terminate the program. Otherwise, increment the number to check for primality and repeat the process. Now, let's implement this algorithm in our assembly language:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | SET R1 0 ; R1 will hold the counter for primes found, starting at 0. SET R2 2 ; R2 will hold the current number to check for primality, starting at 2 (the first prime). check_prime: ; Label to start checking if the current number (R2) is prime. SET R3 2 ; R3 will be the divisor, starting at 2. loop_divisor: ; Label to loop over potential divisors for the current number (R2). EQ R3 R2 ; Check if the divisor (R3) equals the current number (R2). JT store_prime ; If yes, the number is prime, jump to store it. MOD R4 R2 R3 ; R4 = R2 % R3, check if there is a remainder. EQ R4 0 ; Check if the remainder is 0 (meaning R2 is divisible by R3). JT not_prime ; If yes, the number is not prime, jump to increment. INC R3 ; Increment the divisor (R3) by 1. JMP loop_divisor ; Repeat the division check with the next divisor. store_prime: ; Label to store the prime number in memory. STORE R2 R1 ; Store the current prime number (R2) in memory at address R1. INC R1 ; Increment the prime counter/address (R1). EQ R1 20 ; Check if we have found 20 primes. JT end ; If yes, terminate the program. INC R2 ; Increment the current number to check for primality (R2). JMP check_prime ; Go back to check if the new number is prime. not_prime: ; Label for when we find a number is not prime. INC R2 ; Increment the number to check for primality (R2). JMP check_prime ; Go back to check if the new number (R2) is prime. end: ; Label to terminate the program. HCF ; Halt and catch fire, stopping the program. |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | SET R1 0 ; R1 will hold the counter for primes found, starting at 0. SET R2 2 ; R2 will hold the current number to check for primality, starting at 2 (the first prime). check_prime: ; Label to start checking if the current number (R2) is prime. SET R3 2 ; R3 will be the divisor, starting at 2. loop_divisor: ; Label to loop over potential divisors for the current number (R2). EQ R3 R2 ; Check if the divisor (R3) equals the current number (R2). JT store_prime ; If yes, the number is prime, jump to store it. MOD R4 R2 R3 ; R4 = R2 % R3, check if there is a remainder. EQ R4 0 ; Check if the remainder is 0 (meaning R2 is divisible by R3). JT not_prime ; If yes, the number is not prime, jump to increment. INC R3 ; Increment the divisor (R3) by 1. JMP loop_divisor ; Repeat the division check with the next divisor. store_prime: ; Label to store the prime number in memory. STORE R2 R1 ; Store the current prime number (R2) in memory at address R1. INC R1 ; Increment the prime counter/address (R1). EQ R1 20 ; Check if we have found 20 primes. JT end ; If yes, terminate the program. INC R2 ; Increment the current number to check for primality (R2). JMP check_prime ; Go back to check if the new number is prime. not_prime: ; Label for when we find a number is not prime. INC R2 ; Increment the number to check for primality (R2). JMP check_prime ; Go back to check if the new number (R2) is prime. end: ; Label to terminate the program. HCF ; Halt and catch fire, stopping the program. |
Resulting in output: False
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
To solve this problem, we will write an assembly program that generates the first 20 prime numbers and stores them in memory locations 0 through 19. The approach involves iterating numbers from 2 upwards, checking for primality, and storing them if they are prime until we have 20 prime numbers. Here is the assembly code to achieve this:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | ; Initialize SET R1 2 ; Starting number to check for primality SET R2 0 ; Memory index where the prime number will be stored SET R3 20 ; Total prime numbers we want to find ; Main loop start start: ; Check if we have found 20 primes EQ R2 R3 ; Compare the number of found primes with 20 JT end ; If we have found 20 primes, jump to end ; Reset R4 (prime flag) to True for each new number SET R4 1 ; Check primality of R1 SET R5 2 ; Divider starts at 2 check_prime: ; If R5 >= R1, we have checked all numbers, R1 is prime GTE R6 R5 R1 JT is_prime ; Divide R1 by R5, check remainder MOD R7 R1 R5 EQ R8 R7 0 ; If R8 is True (remainder is 0), R1 is not prime JT not_prime ; Increment R5 and continue checking INC R5 JMP check_prime ; Mark the number as not prime not_prime: SET R4 0 JMP next_number ; If the number is prime, store it is_prime: STORE R1 R2 INC R2 ; Move to the next number next_number: INC R1 JMP start ; End of program end: HCF |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | ; Initialize SET R1 2 ; Starting number to check for primality SET R2 0 ; Memory index where the prime number will be stored SET R3 20 ; Total prime numbers we want to find ; Main loop start start: ; Check if we have found 20 primes EQ R2 R3 ; Compare the number of found primes with 20 JT end ; If we have found 20 primes, jump to end ; Reset R4 (prime flag) to True for each new number SET R4 1 ; Check primality of R1 SET R5 2 ; Divider starts at 2 check_prime: ; If R5 >= R1, we have checked all numbers, R1 is prime GTE R6 R5 R1 JT is_prime ; Divide R1 by R5, check remainder MOD R7 R1 R5 EQ R8 R7 0 ; If R8 is True (remainder is 0), R1 is not prime JT not_prime ; Increment R5 and continue checking INC R5 JMP check_prime ; Mark the number as not prime not_prime: SET R4 0 JMP next_number ; If the number is prime, store it is_prime: STORE R1 R2 INC R2 ; Move to the next number next_number: INC R1 JMP start ; End of program end: HCF |
Infinite loop detected Resulting in output: False
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
To create a program that puts the first 20 prime numbers into memory cells 0..19 using the described assembly language, we need to implement a prime-checking algorithm and a loop to continue finding primes until we have stored 20 of them. The basic approach to check if a number is prime is to try dividing it by all numbers less than itself (starting from 2) and see if any division results in a remainder of 0. If we find such a case, the number is not prime. For efficiency, we only need to check up to the square root of the number, but for simplicity, we'll check up to the number itself, as optimizing for square root check is not straightforward in this basic assembly language. Here is how such a program could look:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | SET R1 2 ; R1 will hold the current number to check for primality SET R2 0 ; R2 will hold the index for memory where prime will be stored SET R3 20 ; R3 holds the target count of prime numbers :find_prime SET R4 2 ; R4 will be the divisor, start with 2 SET R5 0 ; R5 will be our flag to mark non-primes, 0 means prime until proven otherwise SET R6 1 ; R6 helps in comparison, as we don't have a direct way to do R4 <= R1 :check_divisibility MOD R7 R1 R4 ; Divide R1 by R4, remainder in R7 EQ R7 R6 ; Compare remainder to 1, flag true if R7 != 1 (i.e., divisible) JF :increment_divisor ; If not divisible, continue SET R5 1 ; Mark as non-prime JMP :not_prime :increment_divisor INC R4 LT R8 R4 R1 ; Check if R4 < R1 for the loop JT :check_divisibility ; If it gets here, it's prime EQ R5 R6 ; Check if R5 is still 0 (prime) JF :store_prime :not_prime INC R1 ; Next number JMP :find_prime :store_prime STORE R1 R2 ; Store the prime number in memory INC R2 ; Move to the next memory position INC R1 ; Next number to check LT R9 R2 R3 ; Check if we've stored 20 primes JT :find_prime ; If not, find the next prime HCF ; End of the program |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | SET R1 2 ; R1 will hold the current number to check for primality SET R2 0 ; R2 will hold the index for memory where prime will be stored SET R3 20 ; R3 holds the target count of prime numbers :find_prime SET R4 2 ; R4 will be the divisor, start with 2 SET R5 0 ; R5 will be our flag to mark non-primes, 0 means prime until proven otherwise SET R6 1 ; R6 helps in comparison, as we don't have a direct way to do R4 <= R1 :check_divisibility MOD R7 R1 R4 ; Divide R1 by R4, remainder in R7 EQ R7 R6 ; Compare remainder to 1, flag true if R7 != 1 (i.e., divisible) JF :increment_divisor ; If not divisible, continue SET R5 1 ; Mark as non-prime JMP :not_prime :increment_divisor INC R4 LT R8 R4 R1 ; Check if R4 < R1 for the loop JT :check_divisibility ; If it gets here, it's prime EQ R5 R6 ; Check if R5 is still 0 (prime) JF :store_prime :not_prime INC R1 ; Next number JMP :find_prime :store_prime STORE R1 R2 ; Store the prime number in memory INC R2 ; Move to the next memory position INC R1 ; Next number to check LT R9 R2 R3 ; Check if we've stored 20 primes JT :find_prime ; If not, find the next prime HCF ; End of the program |
Resulting in output: False
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
Here is the description of a new assembly language: * 8 registers (R1, R2, R3, R4, R5, R6, R7, R8) that can hold integers. * 1 flag that can hold a boolean value (True or False). * 100 memory addresses (0-99) that can hold integers. * 1 instruction pointer that points to the current instruction being executed. Each instruction is of the form OP ARG1 ARG2 ... where ARGn can be either a register (e.g., R1) or a constant (e.g., 10). Labels are written with a lowercase word followed by colon. The assembly language supports the following instructions: * SET Rx C: Assigns the value C to register Rx. * ADD Rx Ry Rz: Adds the values of Ry and Rz and stores the result in Rx. * (similarly for SUB, MUL, DIV, MOD) * EQ Rx Ry: Sets the flag to True if Rx and Ry are equal, False otherwise. * (similarly for NEQ, LT (Rx < Ry), LTE, GT, GTE) * INC/DEC Rx: Increments/Decrements the value of Rx by one. * JMP L: Jumps to label L unconditionally. * JT/JF (jump if true / jump if false) L: Jumps to label L if the is set or not set. * LOAD Rx M: Loads the value at memory address M into register Rx. * STORE Rx M: Stores the value of register Rx into memory address M. * HCF: Stops the program (with pizzazz) Given this assembly language, write a program that puts the first 20 prime numbers in memory cells 0..19
Creating a program to find and store the first 20 prime numbers in memory addresses 0 to 19 in the described assembly language involves utilizing loops, conditionals, and arithmetic operations. The basic idea is to iterate through numbers, starting from 2, check if each number is prime, and if so, store it in the next memory location until we have stored 20 prime numbers. Here's a simplified breakdown before we dive into the code: 1. Initialize a counter for how many primes we've found. 2. Start with the first candidate (2). 3. Check if the current candidate is prime. 4. If it is prime, store it in the next memory location and increment the prime counter. 5. If we've stored 20 primes, halt. Otherwise, move to the next number and repeat from step 3.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | SET R1 2 ; R1 holds the current number to check for primality. SET R2 0 ; R2 holds the count of prime numbers found. SET R3 2 ; R3 is used for division checks in the loop (starting divisor). SET R4 0 ; Temporary storage during checks. SET R5 1 ; Constant value 1, used for incrementing. SET R6 20 ; Total prime numbers to find. check_prime: EQ R4 R3 ; Compare divisor (R3) with the current number (R1) for equality. JT prime ; If R3 == R1, it's prime (no divisors found). MOD R7 R1 R3 ; R7 = R1 % R3, check remainder. EQ R4 R7 ; Compare remainder with 0. JF not_zero ; If remainder is not zero, not divisible, continue. INC R3 ; Increment divisor. SET R7 R1 ; Set R7 to R1 for division. DIV R7 R7 R3; R7 = R7 / R3, check if division results in termination. JT check_prime; If division is valid, loop. not_zero: EQ R7 R3 ; Check if divisor equals the number itself. JF check_prime ; If not, continue loop. INC R3 ; Increment divisor. JMP check_prime ; Continue loop. prime: STORE R1 R2 ; Store the prime number in memory at address in R2. INC R2 ; Increment the address/memory index. EQ R4 R2 ; Compare found primes with 20. JF next_number ; If less than 20, continue finding primes. HCF ; Halt when 20 primes found. next_number: INC R1 ; Increment number to check. SET R3 2 ; Reset divisor to 2. JMP check_prime ; Check new number for primality. |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | SET R1 2 ; R1 holds the current number to check for primality. SET R2 0 ; R2 holds the count of prime numbers found. SET R3 2 ; R3 is used for division checks in the loop (starting divisor). SET R4 0 ; Temporary storage during checks. SET R5 1 ; Constant value 1, used for incrementing. SET R6 20 ; Total prime numbers to find. check_prime: EQ R4 R3 ; Compare divisor (R3) with the current number (R1) for equality. JT prime ; If R3 == R1, it's prime (no divisors found). MOD R7 R1 R3 ; R7 = R1 % R3, check remainder. EQ R4 R7 ; Compare remainder with 0. JF not_zero ; If remainder is not zero, not divisible, continue. INC R3 ; Increment divisor. SET R7 R1 ; Set R7 to R1 for division. DIV R7 R7 R3; R7 = R7 / R3, check if division results in termination. JT check_prime; If division is valid, loop. not_zero: EQ R7 R3 ; Check if divisor equals the number itself. JF check_prime ; If not, continue loop. INC R3 ; Increment divisor. JMP check_prime ; Continue loop. prime: STORE R1 R2 ; Store the prime number in memory at address in R2. INC R2 ; Increment the address/memory index. EQ R4 R2 ; Compare found primes with 20. JF next_number ; If less than 20, continue finding primes. HCF ; Halt when 20 primes found. next_number: INC R1 ; Increment number to check. SET R3 2 ; Reset divisor to 2. JMP check_prime ; Check new number for primality. |
'R3;' Resulting in output: False