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 write a program that stores the first 20 prime numbers in memory cells 0 through 19, we need to implement a prime number generator using the given assembly language. Here's a step-by-step breakdown of the logic: 1. Initialize memory cell indices and counters. 2. Check each number for primality. 3. Store primes in memory cells. Here's the assembly code to accomplish 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 | SET R1 2 ; R1 will be the current number to check for primality SET R2 0 ; R2 will be the index in memory where the next prime should be stored SET R3 20 ; R3 is the number of primes we need to find SET R4 0 ; R4 will be used as a temporary register for counting factors SET R5 2 ; R5 will be our divisor for checking primality find_prime: SET R4 0 ; Reset factor count to 0 SET R5 2 ; Start checking divisors from 2 check_divisor: MOD R6 R1 R5 ; R6 = R1 % R5 (current number mod current divisor) EQ R7 R6 0 ; Set flag if R6 is 0 (divisor divides the number) JT factor_found ; Jump to factor_found if divisor found INC R5 ; Increment divisor MUL R8 R5 R5 ; R8 = R5 * R5 LT R7 R1 R8 ; Set flag if R1 < R8 (no need to check beyond sqrt(R1)) JT no_more_divisors ; Jump if no more divisors to check JMP check_divisor ; Repeat for next divisor factor_found: INC R4 ; Increment factor count JMP check_next_number ; Go to next number if a factor was found no_more_divisors: EQ R7 R4 0 ; Prime if no factors found (R4 is still 0) JF check_next_number ; Go to next number if it's not prime STORE R1 R2 ; Store the prime number in memory INC R2 ; Increment memory index EQ R7 R2 R3 ; Check if we've found 20 primes JT done ; If 20 primes found, jump to done check_next_number: INC R1 ; Increment the number to be checked JMP find_prime ; Check the next number done: HCF ; Halt the program with style |
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 | SET R1 2 ; R1 will be the current number to check for primality SET R2 0 ; R2 will be the index in memory where the next prime should be stored SET R3 20 ; R3 is the number of primes we need to find SET R4 0 ; R4 will be used as a temporary register for counting factors SET R5 2 ; R5 will be our divisor for checking primality find_prime: SET R4 0 ; Reset factor count to 0 SET R5 2 ; Start checking divisors from 2 check_divisor: MOD R6 R1 R5 ; R6 = R1 % R5 (current number mod current divisor) EQ R7 R6 0 ; Set flag if R6 is 0 (divisor divides the number) JT factor_found ; Jump to factor_found if divisor found INC R5 ; Increment divisor MUL R8 R5 R5 ; R8 = R5 * R5 LT R7 R1 R8 ; Set flag if R1 < R8 (no need to check beyond sqrt(R1)) JT no_more_divisors ; Jump if no more divisors to check JMP check_divisor ; Repeat for next divisor factor_found: INC R4 ; Increment factor count JMP check_next_number ; Go to next number if a factor was found no_more_divisors: EQ R7 R4 0 ; Prime if no factors found (R4 is still 0) JF check_next_number ; Go to next number if it's not prime STORE R1 R2 ; Store the prime number in memory INC R2 ; Increment memory index EQ R7 R2 R3 ; Check if we've found 20 primes JT done ; If 20 primes found, jump to done check_next_number: INC R1 ; Increment the number to be checked JMP find_prime ; Check the next number done: HCF ; Halt the program with style |
list assignment index out of range 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
Sure! Here's a program written in the described assembly language that finds and stores the first 20 prime numbers in memory cells 0 through 19.
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 | SET R1 2 ; R1 will be our current candidate number to check for primality SET R2 0 ; R2 will be our count of primes found SET R3 2 ; R3 will be our divisor to check for factors SET R4 1 ; R4 will be used to indicate if a number is prime SET R5 20 ; R5 is the number of primes we want to find SET R6 0 ; R6 is a temporary register SET R7 0 ; R7 is another temporary register SET R8 0 ; R8 will store the square root approximation find_primes: ; Check if we've found enough primes EQ R2 R5 JT done ; Reset R3 and R4 SET R3 2 SET R4 1 check_prime: ; Calculate R3 * R3 and store in R8 MUL R8 R3 R3 GT R6 R8 R1 JT no_factors_left ; Check if R1 is divisible by R3 MOD R6 R1 R3 EQ R6 0 JT not_prime ; Increment R3 INC R3 JMP check_prime no_factors_left: ; If we got here, R1 is prime STORE R1 R2 INC R2 not_prime: ; Increment R1 to test the next candidate INC R1 JMP find_primes done: 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 | SET R1 2 ; R1 will be our current candidate number to check for primality SET R2 0 ; R2 will be our count of primes found SET R3 2 ; R3 will be our divisor to check for factors SET R4 1 ; R4 will be used to indicate if a number is prime SET R5 20 ; R5 is the number of primes we want to find SET R6 0 ; R6 is a temporary register SET R7 0 ; R7 is another temporary register SET R8 0 ; R8 will store the square root approximation find_primes: ; Check if we've found enough primes EQ R2 R5 JT done ; Reset R3 and R4 SET R3 2 SET R4 1 check_prime: ; Calculate R3 * R3 and store in R8 MUL R8 R3 R3 GT R6 R8 R1 JT no_factors_left ; Check if R1 is divisible by R3 MOD R6 R1 R3 EQ R6 0 JT not_prime ; Increment R3 INC R3 JMP check_prime no_factors_left: ; If we got here, R1 is prime STORE R1 R2 INC R2 not_prime: ; Increment R1 to test the next candidate INC R1 JMP find_primes done: 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 write an assembly program that stores the first 20 prime numbers into memory cells 0 through 19, we need to implement the logic for finding prime numbers. A simple way to do this is to use trial division to check for primality. Here’s how we can achieve this with the given assembly language instructions:
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 | SET R1 2 ; R1 will hold the current number to check for primality SET R2 0 ; R2 will be used to store the count of primes found SET R3 1 ; R3 will be used as the divisor (we start checking from 2) SET R4 0 ; R4 will be used as a flag to indicate if a number is prime SET R5 20 ; R5 will hold the target count of prime numbers SET R6 0 ; R6 will be used to store the value of R1 % R3 SET R7 0 ; R7 will be used to store the square root calculation SET R8 0 ; R8 will be used as a temporary register find_next_prime: SET R4 1 ; Assume R1 is prime SET R3 2 ; Start checking divisors from 2 check_divisor: MUL R7 R3 R3 ; R7 = R3 * R3 GT R8 R7 R1 ; R8 = (R7 > R1) JT R8 store_prime ; If R7 > R1, R1 is prime MOD R6 R1 R3 ; R6 = R1 % R3 EQ R8 R6 0 ; R8 = (R6 == 0) JT R8 not_prime ; If R6 == 0, R1 is not prime INC R3 ; Increment divisor JMP check_divisor; Continue checking divisors not_prime: SET R4 0 ; R1 is not prime INC R1 ; Check the next number JMP find_next_prime; Repeat the process store_prime: EQ R8 R4 1 ; Check if R1 is prime JF R8 find_next_prime ; If not, find the next prime STORE R1 R2 ; Store the prime number in memory at address R2 INC R2 ; Increment prime count EQ R8 R2 R5 ; Check if we have stored 20 primes JT R8 end ; If so, end the program INC R1 ; Move to the next number to check JMP find_next_prime ; Repeat the process end: HCF ; Halt 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 40 41 42 43 44 | SET R1 2 ; R1 will hold the current number to check for primality SET R2 0 ; R2 will be used to store the count of primes found SET R3 1 ; R3 will be used as the divisor (we start checking from 2) SET R4 0 ; R4 will be used as a flag to indicate if a number is prime SET R5 20 ; R5 will hold the target count of prime numbers SET R6 0 ; R6 will be used to store the value of R1 % R3 SET R7 0 ; R7 will be used to store the square root calculation SET R8 0 ; R8 will be used as a temporary register find_next_prime: SET R4 1 ; Assume R1 is prime SET R3 2 ; Start checking divisors from 2 check_divisor: MUL R7 R3 R3 ; R7 = R3 * R3 GT R8 R7 R1 ; R8 = (R7 > R1) JT R8 store_prime ; If R7 > R1, R1 is prime MOD R6 R1 R3 ; R6 = R1 % R3 EQ R8 R6 0 ; R8 = (R6 == 0) JT R8 not_prime ; If R6 == 0, R1 is not prime INC R3 ; Increment divisor JMP check_divisor; Continue checking divisors not_prime: SET R4 0 ; R1 is not prime INC R1 ; Check the next number JMP find_next_prime; Repeat the process store_prime: EQ R8 R4 1 ; Check if R1 is prime JF R8 find_next_prime ; If not, find the next prime STORE R1 R2 ; Store the prime number in memory at address R2 INC R2 ; Increment prime count EQ R8 R2 R5 ; Check if we have stored 20 primes JT R8 end ; If so, end the program INC R1 ; Move to the next number to check JMP find_next_prime ; Repeat the process end: HCF ; Halt 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
Sure, let's write an assembly program that finds the first 20 prime numbers and stores them in memory cells 0 to 19. Here's a step-by-step approach: 1. We'll use a loop to check each number starting from 2 to see if it's prime. 2. For each number, we'll check divisibility by all numbers from 2 up to the square root of the number. 3. If the number is prime, we'll store it in memory. 4. We'll continue until we've found and stored 20 prime numbers. Here is the assembly program:
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 | SET R1 2 ; R1 is the current number to check for primality SET R2 0 ; R2 is the count of primes found SET R3 20 ; R3 is the target count of primes SET R4 0 ; R4 is the current memory address to store primes SET R5 2 ; R5 is the divisor for checking primality SET R6 0 ; R6 is a flag to indicate if R1 is prime (1 = prime, 0 = not prime) loop_check_prime: SET R5 2 ; Reset the divisor to 2 SET R6 1 ; Assume R1 is prime check_divisors: MUL R7 R5 R5 ; Compute R5^2 GT R8 R7 R1 ; Check if R5^2 > R1 JT R8 end_check ; If R5^2 > R1, break the loop MOD R7 R1 R5 ; Compute R1 % R5 EQ R8 R7 0 ; Check if R1 % R5 == 0 JT R8 not_prime ; If divisible, R1 is not prime INC R5 ; Increment the divisor JMP check_divisors not_prime: SET R6 0 ; Set prime flag to false end_check: EQ R8 R6 1 ; Check if R1 is still prime JF R8 increment ; If not prime, go to increment ; Store the prime number in memory STORE R1 R4 ; Store R1 in memory address R4 INC R4 ; Move to the next memory address INC R2 ; Increment the count of primes found increment: INC R1 ; Increment the current number to check EQ R8 R2 R3 ; Check if we've found 20 primes JF R8 loop_check_prime ; If not, continue the loop HCF ; Halt the program with pizzazz |
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 | SET R1 2 ; R1 is the current number to check for primality SET R2 0 ; R2 is the count of primes found SET R3 20 ; R3 is the target count of primes SET R4 0 ; R4 is the current memory address to store primes SET R5 2 ; R5 is the divisor for checking primality SET R6 0 ; R6 is a flag to indicate if R1 is prime (1 = prime, 0 = not prime) loop_check_prime: SET R5 2 ; Reset the divisor to 2 SET R6 1 ; Assume R1 is prime check_divisors: MUL R7 R5 R5 ; Compute R5^2 GT R8 R7 R1 ; Check if R5^2 > R1 JT R8 end_check ; If R5^2 > R1, break the loop MOD R7 R1 R5 ; Compute R1 % R5 EQ R8 R7 0 ; Check if R1 % R5 == 0 JT R8 not_prime ; If divisible, R1 is not prime INC R5 ; Increment the divisor JMP check_divisors not_prime: SET R6 0 ; Set prime flag to false end_check: EQ R8 R6 1 ; Check if R1 is still prime JF R8 increment ; If not prime, go to increment ; Store the prime number in memory STORE R1 R4 ; Store R1 in memory address R4 INC R4 ; Move to the next memory address INC R2 ; Increment the count of primes found increment: INC R1 ; Increment the current number to check EQ R8 R2 R3 ; Check if we've found 20 primes JF R8 loop_check_prime ; If not, continue the loop HCF ; Halt the program with pizzazz |
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
Certainly! Here's a program that calculates the first 20 prime numbers and stores them in memory addresses 0 through 19:
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 | SET R1 0 ; R1 will hold the count of primes found SET R2 2 ; R2 will hold the current number being tested for primality find_prime: SET R3 2 ; R3 will be the divisor to test for primality SET R4 1 ; R4 will be a flag to indicate if R2 is prime (1 means prime) check_divisibility: MOD R5 R2 R3 ; R5 = R2 % R3 EQ R5 0 ; Check if R2 is divisible by R3 (R2 % R3 == 0) JT not_prime ; If true, R2 is not prime, jump to not_prime INC R3 ; Increment divisor (R3) MUL R6 R3 R3 ; R6 = R3 * R3 GT R6 R2 ; Check if R3^2 > R2 JT is_prime ; If true, R2 is prime, jump to is_prime JMP check_divisibility ; Continue checking divisibility with next divisor not_prime: SET R4 0 ; R2 is not prime is_prime: EQ R4 1 ; Check if R4 is still 1 (R2 is prime) JF next_number ; If false, jump to next_number STORE R2 R1 ; Store the prime number in memory at address R1 INC R1 ; Increment the prime count (R1) EQ R1 20 ; Check if we have found 20 primes JT done ; If true, jump to done next_number: INC R2 ; Increment the number to test JMP find_prime ; Repeat the process done: HCF ; Halt and Catch Fire |
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 | SET R1 0 ; R1 will hold the count of primes found SET R2 2 ; R2 will hold the current number being tested for primality find_prime: SET R3 2 ; R3 will be the divisor to test for primality SET R4 1 ; R4 will be a flag to indicate if R2 is prime (1 means prime) check_divisibility: MOD R5 R2 R3 ; R5 = R2 % R3 EQ R5 0 ; Check if R2 is divisible by R3 (R2 % R3 == 0) JT not_prime ; If true, R2 is not prime, jump to not_prime INC R3 ; Increment divisor (R3) MUL R6 R3 R3 ; R6 = R3 * R3 GT R6 R2 ; Check if R3^2 > R2 JT is_prime ; If true, R2 is prime, jump to is_prime JMP check_divisibility ; Continue checking divisibility with next divisor not_prime: SET R4 0 ; R2 is not prime is_prime: EQ R4 1 ; Check if R4 is still 1 (R2 is prime) JF next_number ; If false, jump to next_number STORE R2 R1 ; Store the prime number in memory at address R1 INC R1 ; Increment the prime count (R1) EQ R1 20 ; Check if we have found 20 primes JT done ; If true, jump to done next_number: INC R2 ; Increment the number to test JMP find_prime ; Repeat the process done: HCF ; Halt and Catch Fire |
Resulting in output: False