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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
Here's a Python implementation of an interpreter for the described 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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False ip = 0 # instruction pointer # Preprocess to create label map lines = program.split('\n') labels = {} clean_lines = [] for i, line in enumerate(lines): # Remove comments line = line.split('//')[0].strip() if not line: continue # Check for labels if line.endswith(':'): labels[line[:-1]] = len(clean_lines) else: clean_lines.append(line) # Helper to parse argument (register or constant) def parse_arg(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program while ip < len(clean_lines): # Parse instruction instr = clean_lines[ip].split() op = instr[0] # Execute instruction if op == 'SET': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) elif op == 'ADD': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) + parse_arg(instr[3]) elif op == 'SUB': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) - parse_arg(instr[3]) elif op == 'MUL': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) * parse_arg(instr[3]) elif op == 'DIV': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) // parse_arg(instr[3]) elif op == 'MOD': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) % parse_arg(instr[3]) elif op == 'INC': registers[int(instr[1][1]) - 1] += 1 elif op == 'DEC': registers[int(instr[1][1]) - 1] -= 1 elif op == 'EQ': flag = parse_arg(instr[1]) == parse_arg(instr[2]) elif op == 'NEQ': flag = parse_arg(instr[1]) != parse_arg(instr[2]) elif op == 'LT': flag = parse_arg(instr[1]) < parse_arg(instr[2]) elif op == 'LTE': flag = parse_arg(instr[1]) <= parse_arg(instr[2]) elif op == 'GT': flag = parse_arg(instr[1]) > parse_arg(instr[2]) elif op == 'GTE': flag = parse_arg(instr[1]) >= parse_arg(instr[2]) elif op == 'JMP': ip = labels[instr[1]] continue elif op == 'JT': if flag: ip = labels[instr[1]] continue elif op == 'JF': if not flag: ip = labels[instr[1]] continue elif op == 'LOAD': registers[int(instr[1][1]) - 1] = memory[parse_arg(instr[2])] elif op == 'STORE': memory[parse_arg(instr[2])] = parse_arg(instr[1]) elif op == 'HCF': break # Move to next instruction ip += 1 # Return the first 20 memory locations (as per the example) return memory[:20] # Test the interpreter with the squares program program = ''' SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop end: HCF ''' print(evaluate(program)) |
1 | [1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400] |
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 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False ip = 0 # instruction pointer # Preprocess to create label map lines = program.split('\n') labels = {} clean_lines = [] for i, line in enumerate(lines): # Remove comments line = line.split('//')[0].strip() if not line: continue # Check for labels if line.endswith(':'): labels[line[:-1]] = len(clean_lines) else: clean_lines.append(line) # Helper to parse argument (register or constant) def parse_arg(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program while ip < len(clean_lines): # Parse instruction instr = clean_lines[ip].split() op = instr[0] # Execute instruction if op == 'SET': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) elif op == 'ADD': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) + parse_arg(instr[3]) elif op == 'SUB': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) - parse_arg(instr[3]) elif op == 'MUL': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) * parse_arg(instr[3]) elif op == 'DIV': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) // parse_arg(instr[3]) elif op == 'MOD': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) % parse_arg(instr[3]) elif op == 'INC': registers[int(instr[1][1]) - 1] += 1 elif op == 'DEC': registers[int(instr[1][1]) - 1] -= 1 elif op == 'EQ': flag = parse_arg(instr[1]) == parse_arg(instr[2]) elif op == 'NEQ': flag = parse_arg(instr[1]) != parse_arg(instr[2]) elif op == 'LT': flag = parse_arg(instr[1]) < parse_arg(instr[2]) elif op == 'LTE': flag = parse_arg(instr[1]) <= parse_arg(instr[2]) elif op == 'GT': flag = parse_arg(instr[1]) > parse_arg(instr[2]) elif op == 'GTE': flag = parse_arg(instr[1]) >= parse_arg(instr[2]) elif op == 'JMP': ip = labels[instr[1]] continue elif op == 'JT': if flag: ip = labels[instr[1]] continue elif op == 'JF': if not flag: ip = labels[instr[1]] continue elif op == 'LOAD': registers[int(instr[1][1]) - 1] = memory[parse_arg(instr[2])] elif op == 'STORE': memory[parse_arg(instr[2])] = parse_arg(instr[1]) elif op == 'HCF': break # Move to next instruction ip += 1 # Return the first 20 memory locations (as per the example) return memory[:20] |
Running the following 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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False ip = 0 # instruction pointer # Preprocess to create label map lines = program.split('\n') labels = {} clean_lines = [] for i, line in enumerate(lines): # Remove comments line = line.split('//')[0].strip() if not line: continue # Check for labels if line.endswith(':'): labels[line[:-1]] = len(clean_lines) else: clean_lines.append(line) # Helper to parse argument (register or constant) def parse_arg(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program while ip < len(clean_lines): # Parse instruction instr = clean_lines[ip].split() op = instr[0] # Execute instruction if op == 'SET': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) elif op == 'ADD': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) + parse_arg(instr[3]) elif op == 'SUB': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) - parse_arg(instr[3]) elif op == 'MUL': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) * parse_arg(instr[3]) elif op == 'DIV': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) // parse_arg(instr[3]) elif op == 'MOD': registers[int(instr[1][1]) - 1] = parse_arg(instr[2]) % parse_arg(instr[3]) elif op == 'INC': registers[int(instr[1][1]) - 1] += 1 elif op == 'DEC': registers[int(instr[1][1]) - 1] -= 1 elif op == 'EQ': flag = parse_arg(instr[1]) == parse_arg(instr[2]) elif op == 'NEQ': flag = parse_arg(instr[1]) != parse_arg(instr[2]) elif op == 'LT': flag = parse_arg(instr[1]) < parse_arg(instr[2]) elif op == 'LTE': flag = parse_arg(instr[1]) <= parse_arg(instr[2]) elif op == 'GT': flag = parse_arg(instr[1]) > parse_arg(instr[2]) elif op == 'GTE': flag = parse_arg(instr[1]) >= parse_arg(instr[2]) elif op == 'JMP': ip = labels[instr[1]] continue elif op == 'JT': if flag: ip = labels[instr[1]] continue elif op == 'JF': if not flag: ip = labels[instr[1]] continue elif op == 'LOAD': registers[int(instr[1][1]) - 1] = memory[parse_arg(instr[2])] elif op == 'STORE': memory[parse_arg(instr[2])] = parse_arg(instr[1]) elif op == 'HCF': break # Move to next instruction ip += 1 # Return the first 20 memory locations (as per the example) return memory[:20] answer = evaluate(""" SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop """)[:10] expected = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' answer = evaluate(""" SET R1 2 // Starting number to check for prime start_find_primes: JMP is_prime // Control will return after executing is_prime with R1 as input and R2 containing the result ready_prime: SET R7 1 EQ R2 R7 // Check if R2 is 1 (prime) JF increment // If not prime, skip storing and increment the number // Store prime number in memory and increment count STORE R1 R8 // Store prime number at address pointed by R8 INC R8 // Increment prime count // Check if 100 primes are found SET R7 100 EQ R8 R7 JF increment // If not 100 primes found yet, continue finding JMP end // If 100 primes found, end program increment: INC R1 // Increment number to check for prime JMP start_find_primes // Check next number is_prime: SET R2 1 // Assume number is prime initially SET R3 2 // Start divisor from 2 start_loop: // Label to start the loop // Check if we have exceeded the square root of R1 MUL R4 R3 R3 // R4 = R3 * R3 GT R4 R1 // Set flag if R4 > R1 JT is_prime_end // If not exceeded, continue; else, end loop MOD R6 R1 R3 // R6 = R1 % R3 SET R7 0 EQ R7 R6 // Check if R6 is 0 JT not_prime // If yes, number is not prime INC R3 // Increment divisor JMP start_loop // Repeat loop not_prime: SET R2 0 // Set result to 0 (not prime) is_prime_end: JMP ready_prime end: """)[:10] expected = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' print('All tests passed') |
All tests passed
Testing if the previous output contains the string All tests passed
: True
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
Here's a Python implementation of an interpreter for the described 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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False ip = 0 # instruction pointer # Preprocess to get label positions lines = program.split('\n') labels = {} cleaned_lines = [] for line_num, line in enumerate(lines): # Remove comments and whitespace line = line.split('//')[0].strip() if not line: continue # Check for labels if line.endswith(':'): labels[line[:-1]] = len(cleaned_lines) else: cleaned_lines.append(line) # Helper to resolve argument (register or constant) def resolve_arg(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program while ip < len(cleaned_lines): # Parse instruction parts = cleaned_lines[ip].split() op = parts[0] # Instruction implementations if op == 'SET': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) elif op == 'ADD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) + resolve_arg(parts[3]) elif op == 'SUB': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) - resolve_arg(parts[3]) elif op == 'MUL': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) * resolve_arg(parts[3]) elif op == 'DIV': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) // resolve_arg(parts[3]) elif op == 'MOD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) % resolve_arg(parts[3]) elif op == 'INC': reg_index = int(parts[1][1]) - 1 registers[reg_index] += 1 elif op == 'DEC': reg_index = int(parts[1][1]) - 1 registers[reg_index] -= 1 elif op == 'EQ': flag = resolve_arg(parts[1]) == resolve_arg(parts[2]) elif op == 'NEQ': flag = resolve_arg(parts[1]) != resolve_arg(parts[2]) elif op == 'LT': flag = resolve_arg(parts[1]) < resolve_arg(parts[2]) elif op == 'LTE': flag = resolve_arg(parts[1]) <= resolve_arg(parts[2]) elif op == 'GT': flag = resolve_arg(parts[1]) > resolve_arg(parts[2]) elif op == 'GTE': flag = resolve_arg(parts[1]) >= resolve_arg(parts[2]) elif op == 'LOAD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = memory[resolve_arg(parts[2])] elif op == 'STORE': memory[resolve_arg(parts[2])] = resolve_arg(parts[1]) elif op == 'JMP': ip = labels[parts[1]] continue elif op == 'JT': if flag: ip = labels[parts[1]] continue elif op == 'JF': if not flag: ip = labels[parts[1]] continue elif op == 'HCF': break # Move to next instruction ip += 1 return memory # Test the square numbers program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' # Run and print the first 20 square numbers print(evaluate(program)[:20]) |
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 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False ip = 0 # instruction pointer # Preprocess to get label positions lines = program.split('\n') labels = {} cleaned_lines = [] for line_num, line in enumerate(lines): # Remove comments and whitespace line = line.split('//')[0].strip() if not line: continue # Check for labels if line.endswith(':'): labels[line[:-1]] = len(cleaned_lines) else: cleaned_lines.append(line) # Helper to resolve argument (register or constant) def resolve_arg(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program while ip < len(cleaned_lines): # Parse instruction parts = cleaned_lines[ip].split() op = parts[0] # Instruction implementations if op == 'SET': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) elif op == 'ADD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) + resolve_arg(parts[3]) elif op == 'SUB': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) - resolve_arg(parts[3]) elif op == 'MUL': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) * resolve_arg(parts[3]) elif op == 'DIV': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) // resolve_arg(parts[3]) elif op == 'MOD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) % resolve_arg(parts[3]) elif op == 'INC': reg_index = int(parts[1][1]) - 1 registers[reg_index] += 1 elif op == 'DEC': reg_index = int(parts[1][1]) - 1 registers[reg_index] -= 1 elif op == 'EQ': flag = resolve_arg(parts[1]) == resolve_arg(parts[2]) elif op == 'NEQ': flag = resolve_arg(parts[1]) != resolve_arg(parts[2]) elif op == 'LT': flag = resolve_arg(parts[1]) < resolve_arg(parts[2]) elif op == 'LTE': flag = resolve_arg(parts[1]) <= resolve_arg(parts[2]) elif op == 'GT': flag = resolve_arg(parts[1]) > resolve_arg(parts[2]) elif op == 'GTE': flag = resolve_arg(parts[1]) >= resolve_arg(parts[2]) elif op == 'LOAD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = memory[resolve_arg(parts[2])] elif op == 'STORE': memory[resolve_arg(parts[2])] = resolve_arg(parts[1]) elif op == 'JMP': ip = labels[parts[1]] continue elif op == 'JT': if flag: ip = labels[parts[1]] continue elif op == 'JF': if not flag: ip = labels[parts[1]] continue elif op == 'HCF': break # Move to next instruction ip += 1 return memory # Test the square numbers program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' # Run and print the first 20 square numbers print(evaluate(program)[:20]) |
Running the following 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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False ip = 0 # instruction pointer # Preprocess to get label positions lines = program.split('\n') labels = {} cleaned_lines = [] for line_num, line in enumerate(lines): # Remove comments and whitespace line = line.split('//')[0].strip() if not line: continue # Check for labels if line.endswith(':'): labels[line[:-1]] = len(cleaned_lines) else: cleaned_lines.append(line) # Helper to resolve argument (register or constant) def resolve_arg(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program while ip < len(cleaned_lines): # Parse instruction parts = cleaned_lines[ip].split() op = parts[0] # Instruction implementations if op == 'SET': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) elif op == 'ADD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) + resolve_arg(parts[3]) elif op == 'SUB': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) - resolve_arg(parts[3]) elif op == 'MUL': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) * resolve_arg(parts[3]) elif op == 'DIV': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) // resolve_arg(parts[3]) elif op == 'MOD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = resolve_arg(parts[2]) % resolve_arg(parts[3]) elif op == 'INC': reg_index = int(parts[1][1]) - 1 registers[reg_index] += 1 elif op == 'DEC': reg_index = int(parts[1][1]) - 1 registers[reg_index] -= 1 elif op == 'EQ': flag = resolve_arg(parts[1]) == resolve_arg(parts[2]) elif op == 'NEQ': flag = resolve_arg(parts[1]) != resolve_arg(parts[2]) elif op == 'LT': flag = resolve_arg(parts[1]) < resolve_arg(parts[2]) elif op == 'LTE': flag = resolve_arg(parts[1]) <= resolve_arg(parts[2]) elif op == 'GT': flag = resolve_arg(parts[1]) > resolve_arg(parts[2]) elif op == 'GTE': flag = resolve_arg(parts[1]) >= resolve_arg(parts[2]) elif op == 'LOAD': reg_index = int(parts[1][1]) - 1 registers[reg_index] = memory[resolve_arg(parts[2])] elif op == 'STORE': memory[resolve_arg(parts[2])] = resolve_arg(parts[1]) elif op == 'JMP': ip = labels[parts[1]] continue elif op == 'JT': if flag: ip = labels[parts[1]] continue elif op == 'JF': if not flag: ip = labels[parts[1]] continue elif op == 'HCF': break # Move to next instruction ip += 1 return memory # Test the square numbers program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' # Run and print the first 20 square numbers print(evaluate(program)[:20]) answer = evaluate(""" SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop """)[:10] expected = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' answer = evaluate(""" SET R1 2 // Starting number to check for prime start_find_primes: JMP is_prime // Control will return after executing is_prime with R1 as input and R2 containing the result ready_prime: SET R7 1 EQ R2 R7 // Check if R2 is 1 (prime) JF increment // If not prime, skip storing and increment the number // Store prime number in memory and increment count STORE R1 R8 // Store prime number at address pointed by R8 INC R8 // Increment prime count // Check if 100 primes are found SET R7 100 EQ R8 R7 JF increment // If not 100 primes found yet, continue finding JMP end // If 100 primes found, end program increment: INC R1 // Increment number to check for prime JMP start_find_primes // Check next number is_prime: SET R2 1 // Assume number is prime initially SET R3 2 // Start divisor from 2 start_loop: // Label to start the loop // Check if we have exceeded the square root of R1 MUL R4 R3 R3 // R4 = R3 * R3 GT R4 R1 // Set flag if R4 > R1 JT is_prime_end // If not exceeded, continue; else, end loop MOD R6 R1 R3 // R6 = R1 % R3 SET R7 0 EQ R7 R6 // Check if R6 is 0 JT not_prime // If yes, number is not prime INC R3 // Increment divisor JMP start_loop // Repeat loop not_prime: SET R2 0 // Set result to 0 (not prime) is_prime_end: JMP ready_prime end: """)[:10] expected = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' print('All tests passed') |
[1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400]
All tests passed
Testing if the previous output contains the string All tests passed
: True
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
Here's a Python implementation of an interpreter for the described 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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | def evaluate(program_str): # Parse the program into lines, removing comments and whitespace lines = [line.split('//')[0].strip() for line in program_str.split('\n') if line.strip() and not line.strip().startswith('//')] # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False # Boolean flag ip = 0 # Instruction pointer # Create label mapping labels = {} for i, line in enumerate(lines): if ':' in line: label, _ = line.split(':', 1) labels[label.strip()] = i def get_value(arg): # Helper to get actual value (either from register or constant) if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Run the program while ip < len(lines): # Parse current instruction line = lines[ip] if ':' in line: line = line.split(':', 1)[1].strip() parts = line.split() op = parts[0] # Process instruction if op == 'SET': registers[int(parts[1][1]) - 1] = get_value(parts[2]) elif op == 'ADD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) + get_value(parts[3]) elif op == 'SUB': registers[int(parts[1][1]) - 1] = get_value(parts[2]) - get_value(parts[3]) elif op == 'MUL': registers[int(parts[1][1]) - 1] = get_value(parts[2]) * get_value(parts[3]) elif op == 'DIV': registers[int(parts[1][1]) - 1] = get_value(parts[2]) // get_value(parts[3]) elif op == 'MOD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) % get_value(parts[3]) elif op == 'EQ': flag = (get_value(parts[1]) == get_value(parts[2])) elif op == 'NEQ': flag = (get_value(parts[1]) != get_value(parts[2])) elif op == 'LT': flag = (get_value(parts[1]) < get_value(parts[2])) elif op == 'LTE': flag = (get_value(parts[1]) <= get_value(parts[2])) elif op == 'GT': flag = (get_value(parts[1]) > get_value(parts[2])) elif op == 'GTE': flag = (get_value(parts[1]) >= get_value(parts[2])) elif op == 'INC': registers[int(parts[1][1]) - 1] += 1 elif op == 'DEC': registers[int(parts[1][1]) - 1] -= 1 elif op == 'JMP': ip = labels[parts[1]] - 1 elif op == 'JT': if flag: ip = labels[parts[1]] - 1 elif op == 'JF': if not flag: ip = labels[parts[1]] - 1 elif op == 'LOAD': registers[int(parts[1][1]) - 1] = memory[get_value(parts[2])] elif op == 'STORE': memory[get_value(parts[2])] = get_value(parts[1]) elif op == 'HCF': break ip += 1 return memory # Test the program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' result = evaluate(program) print(result[:20]) # First 20 square numbers |
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 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | def evaluate(program_str): # Parse the program into lines, removing comments and whitespace lines = [line.split('//')[0].strip() for line in program_str.split('\n') if line.strip() and not line.strip().startswith('//')] # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False # Boolean flag ip = 0 # Instruction pointer # Create label mapping labels = {} for i, line in enumerate(lines): if ':' in line: label, _ = line.split(':', 1) labels[label.strip()] = i def get_value(arg): # Helper to get actual value (either from register or constant) if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Run the program while ip < len(lines): # Parse current instruction line = lines[ip] if ':' in line: line = line.split(':', 1)[1].strip() parts = line.split() op = parts[0] # Process instruction if op == 'SET': registers[int(parts[1][1]) - 1] = get_value(parts[2]) elif op == 'ADD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) + get_value(parts[3]) elif op == 'SUB': registers[int(parts[1][1]) - 1] = get_value(parts[2]) - get_value(parts[3]) elif op == 'MUL': registers[int(parts[1][1]) - 1] = get_value(parts[2]) * get_value(parts[3]) elif op == 'DIV': registers[int(parts[1][1]) - 1] = get_value(parts[2]) // get_value(parts[3]) elif op == 'MOD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) % get_value(parts[3]) elif op == 'EQ': flag = (get_value(parts[1]) == get_value(parts[2])) elif op == 'NEQ': flag = (get_value(parts[1]) != get_value(parts[2])) elif op == 'LT': flag = (get_value(parts[1]) < get_value(parts[2])) elif op == 'LTE': flag = (get_value(parts[1]) <= get_value(parts[2])) elif op == 'GT': flag = (get_value(parts[1]) > get_value(parts[2])) elif op == 'GTE': flag = (get_value(parts[1]) >= get_value(parts[2])) elif op == 'INC': registers[int(parts[1][1]) - 1] += 1 elif op == 'DEC': registers[int(parts[1][1]) - 1] -= 1 elif op == 'JMP': ip = labels[parts[1]] - 1 elif op == 'JT': if flag: ip = labels[parts[1]] - 1 elif op == 'JF': if not flag: ip = labels[parts[1]] - 1 elif op == 'LOAD': registers[int(parts[1][1]) - 1] = memory[get_value(parts[2])] elif op == 'STORE': memory[get_value(parts[2])] = get_value(parts[1]) elif op == 'HCF': break ip += 1 return memory # Test the program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' result = evaluate(program) print(result[:20]) # First 20 square numbers |
Running the following 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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 | def evaluate(program_str): # Parse the program into lines, removing comments and whitespace lines = [line.split('//')[0].strip() for line in program_str.split('\n') if line.strip() and not line.strip().startswith('//')] # Initialize state registers = [0] * 8 # 8 registers initialized to 0 memory = [0] * 100 # 100 memory addresses initialized to 0 flag = False # Boolean flag ip = 0 # Instruction pointer # Create label mapping labels = {} for i, line in enumerate(lines): if ':' in line: label, _ = line.split(':', 1) labels[label.strip()] = i def get_value(arg): # Helper to get actual value (either from register or constant) if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Run the program while ip < len(lines): # Parse current instruction line = lines[ip] if ':' in line: line = line.split(':', 1)[1].strip() parts = line.split() op = parts[0] # Process instruction if op == 'SET': registers[int(parts[1][1]) - 1] = get_value(parts[2]) elif op == 'ADD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) + get_value(parts[3]) elif op == 'SUB': registers[int(parts[1][1]) - 1] = get_value(parts[2]) - get_value(parts[3]) elif op == 'MUL': registers[int(parts[1][1]) - 1] = get_value(parts[2]) * get_value(parts[3]) elif op == 'DIV': registers[int(parts[1][1]) - 1] = get_value(parts[2]) // get_value(parts[3]) elif op == 'MOD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) % get_value(parts[3]) elif op == 'EQ': flag = (get_value(parts[1]) == get_value(parts[2])) elif op == 'NEQ': flag = (get_value(parts[1]) != get_value(parts[2])) elif op == 'LT': flag = (get_value(parts[1]) < get_value(parts[2])) elif op == 'LTE': flag = (get_value(parts[1]) <= get_value(parts[2])) elif op == 'GT': flag = (get_value(parts[1]) > get_value(parts[2])) elif op == 'GTE': flag = (get_value(parts[1]) >= get_value(parts[2])) elif op == 'INC': registers[int(parts[1][1]) - 1] += 1 elif op == 'DEC': registers[int(parts[1][1]) - 1] -= 1 elif op == 'JMP': ip = labels[parts[1]] - 1 elif op == 'JT': if flag: ip = labels[parts[1]] - 1 elif op == 'JF': if not flag: ip = labels[parts[1]] - 1 elif op == 'LOAD': registers[int(parts[1][1]) - 1] = memory[get_value(parts[2])] elif op == 'STORE': memory[get_value(parts[2])] = get_value(parts[1]) elif op == 'HCF': break ip += 1 return memory # Test the program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' result = evaluate(program) print(result[:20]) # First 20 square numbers answer = evaluate(""" SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop """)[:10] expected = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' answer = evaluate(""" SET R1 2 // Starting number to check for prime start_find_primes: JMP is_prime // Control will return after executing is_prime with R1 as input and R2 containing the result ready_prime: SET R7 1 EQ R2 R7 // Check if R2 is 1 (prime) JF increment // If not prime, skip storing and increment the number // Store prime number in memory and increment count STORE R1 R8 // Store prime number at address pointed by R8 INC R8 // Increment prime count // Check if 100 primes are found SET R7 100 EQ R8 R7 JF increment // If not 100 primes found yet, continue finding JMP end // If 100 primes found, end program increment: INC R1 // Increment number to check for prime JMP start_find_primes // Check next number is_prime: SET R2 1 // Assume number is prime initially SET R3 2 // Start divisor from 2 start_loop: // Label to start the loop // Check if we have exceeded the square root of R1 MUL R4 R3 R3 // R4 = R3 * R3 GT R4 R1 // Set flag if R4 > R1 JT is_prime_end // If not exceeded, continue; else, end loop MOD R6 R1 R3 // R6 = R1 % R3 SET R7 0 EQ R7 R6 // Check if R6 is 0 JT not_prime // If yes, number is not prime INC R3 // Increment divisor JMP start_loop // Repeat loop not_prime: SET R2 0 // Set result to 0 (not prime) is_prime_end: JMP ready_prime end: """)[:10] expected = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' print('All tests passed') |
Traceback (most recent call last):
File "/usr/src/app/main.py", line 120, in <module>
result = evaluate(program)
^^^^^^^^^^^^^^^^^
File "/usr/src/app/main.py", line 33, in evaluate
op = parts[0]
~~~~~^^^
IndexError: list index out of range
Testing if the previous output contains the string All tests passed
: 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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
Here's a Python implementation of an interpreter for the described 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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers memory = [0] * 100 # 100 memory addresses flag = False # Preprocess program to create label map lines = program.strip().split('\n') lines = [line.split('//')[0].strip() for line in lines] # Remove comments label_map = {} clean_lines = [] for line in lines: if line.endswith(':'): label_map[line[:-1]] = len(clean_lines) elif line: clean_lines.append(line) # Helper function to get value (either from register or as constant) def get_value(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program ip = 0 # Instruction pointer while ip < len(clean_lines): instr = clean_lines[ip].split() op = instr[0] if op == 'SET': registers[int(instr[1][1]) - 1] = get_value(instr[2]) elif op == 'ADD': registers[int(instr[1][1]) - 1] = get_value(instr[2]) + get_value(instr[3]) elif op == 'SUB': registers[int(instr[1][1]) - 1] = get_value(instr[2]) - get_value(instr[3]) elif op == 'MUL': registers[int(instr[1][1]) - 1] = get_value(instr[2]) * get_value(instr[3]) elif op == 'DIV': registers[int(instr[1][1]) - 1] = get_value(instr[2]) // get_value(instr[3]) elif op == 'MOD': registers[int(instr[1][1]) - 1] = get_value(instr[2]) % get_value(instr[3]) elif op == 'EQ': flag = get_value(instr[1]) == get_value(instr[2]) elif op == 'NEQ': flag = get_value(instr[1]) != get_value(instr[2]) elif op == 'LT': flag = get_value(instr[1]) < get_value(instr[2]) elif op == 'LTE': flag = get_value(instr[1]) <= get_value(instr[2]) elif op == 'GT': flag = get_value(instr[1]) > get_value(instr[2]) elif op == 'GTE': flag = get_value(instr[1]) >= get_value(instr[2]) elif op == 'INC': registers[int(instr[1][1]) - 1] += 1 elif op == 'DEC': registers[int(instr[1][1]) - 1] -= 1 elif op == 'JMP': ip = label_map[instr[1]] continue elif op == 'JT': if flag: ip = label_map[instr[1]] continue elif op == 'JF': if not flag: ip = label_map[instr[1]] continue elif op == 'LOAD': registers[int(instr[1][1]) - 1] = memory[get_value(instr[2])] elif op == 'STORE': memory[get_value(instr[2])] = get_value(instr[1]) elif op == 'HCF': break ip += 1 return memory # Test the program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' result = evaluate(program) print(result[:20]) # First 20 square numbers |
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 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers memory = [0] * 100 # 100 memory addresses flag = False # Preprocess program to create label map lines = program.strip().split('\n') lines = [line.split('//')[0].strip() for line in lines] # Remove comments label_map = {} clean_lines = [] for line in lines: if line.endswith(':'): label_map[line[:-1]] = len(clean_lines) elif line: clean_lines.append(line) # Helper function to get value (either from register or as constant) def get_value(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program ip = 0 # Instruction pointer while ip < len(clean_lines): instr = clean_lines[ip].split() op = instr[0] if op == 'SET': registers[int(instr[1][1]) - 1] = get_value(instr[2]) elif op == 'ADD': registers[int(instr[1][1]) - 1] = get_value(instr[2]) + get_value(instr[3]) elif op == 'SUB': registers[int(instr[1][1]) - 1] = get_value(instr[2]) - get_value(instr[3]) elif op == 'MUL': registers[int(instr[1][1]) - 1] = get_value(instr[2]) * get_value(instr[3]) elif op == 'DIV': registers[int(instr[1][1]) - 1] = get_value(instr[2]) // get_value(instr[3]) elif op == 'MOD': registers[int(instr[1][1]) - 1] = get_value(instr[2]) % get_value(instr[3]) elif op == 'EQ': flag = get_value(instr[1]) == get_value(instr[2]) elif op == 'NEQ': flag = get_value(instr[1]) != get_value(instr[2]) elif op == 'LT': flag = get_value(instr[1]) < get_value(instr[2]) elif op == 'LTE': flag = get_value(instr[1]) <= get_value(instr[2]) elif op == 'GT': flag = get_value(instr[1]) > get_value(instr[2]) elif op == 'GTE': flag = get_value(instr[1]) >= get_value(instr[2]) elif op == 'INC': registers[int(instr[1][1]) - 1] += 1 elif op == 'DEC': registers[int(instr[1][1]) - 1] -= 1 elif op == 'JMP': ip = label_map[instr[1]] continue elif op == 'JT': if flag: ip = label_map[instr[1]] continue elif op == 'JF': if not flag: ip = label_map[instr[1]] continue elif op == 'LOAD': registers[int(instr[1][1]) - 1] = memory[get_value(instr[2])] elif op == 'STORE': memory[get_value(instr[2])] = get_value(instr[1]) elif op == 'HCF': break ip += 1 return memory # Test the program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' result = evaluate(program) print(result[:20]) # First 20 square numbers |
Running the following 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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers memory = [0] * 100 # 100 memory addresses flag = False # Preprocess program to create label map lines = program.strip().split('\n') lines = [line.split('//')[0].strip() for line in lines] # Remove comments label_map = {} clean_lines = [] for line in lines: if line.endswith(':'): label_map[line[:-1]] = len(clean_lines) elif line: clean_lines.append(line) # Helper function to get value (either from register or as constant) def get_value(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Execute program ip = 0 # Instruction pointer while ip < len(clean_lines): instr = clean_lines[ip].split() op = instr[0] if op == 'SET': registers[int(instr[1][1]) - 1] = get_value(instr[2]) elif op == 'ADD': registers[int(instr[1][1]) - 1] = get_value(instr[2]) + get_value(instr[3]) elif op == 'SUB': registers[int(instr[1][1]) - 1] = get_value(instr[2]) - get_value(instr[3]) elif op == 'MUL': registers[int(instr[1][1]) - 1] = get_value(instr[2]) * get_value(instr[3]) elif op == 'DIV': registers[int(instr[1][1]) - 1] = get_value(instr[2]) // get_value(instr[3]) elif op == 'MOD': registers[int(instr[1][1]) - 1] = get_value(instr[2]) % get_value(instr[3]) elif op == 'EQ': flag = get_value(instr[1]) == get_value(instr[2]) elif op == 'NEQ': flag = get_value(instr[1]) != get_value(instr[2]) elif op == 'LT': flag = get_value(instr[1]) < get_value(instr[2]) elif op == 'LTE': flag = get_value(instr[1]) <= get_value(instr[2]) elif op == 'GT': flag = get_value(instr[1]) > get_value(instr[2]) elif op == 'GTE': flag = get_value(instr[1]) >= get_value(instr[2]) elif op == 'INC': registers[int(instr[1][1]) - 1] += 1 elif op == 'DEC': registers[int(instr[1][1]) - 1] -= 1 elif op == 'JMP': ip = label_map[instr[1]] continue elif op == 'JT': if flag: ip = label_map[instr[1]] continue elif op == 'JF': if not flag: ip = label_map[instr[1]] continue elif op == 'LOAD': registers[int(instr[1][1]) - 1] = memory[get_value(instr[2])] elif op == 'STORE': memory[get_value(instr[2])] = get_value(instr[1]) elif op == 'HCF': break ip += 1 return memory # Test the program program = ''' SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program ''' result = evaluate(program) print(result[:20]) # First 20 square numbers answer = evaluate(""" SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop """)[:10] expected = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' answer = evaluate(""" SET R1 2 // Starting number to check for prime start_find_primes: JMP is_prime // Control will return after executing is_prime with R1 as input and R2 containing the result ready_prime: SET R7 1 EQ R2 R7 // Check if R2 is 1 (prime) JF increment // If not prime, skip storing and increment the number // Store prime number in memory and increment count STORE R1 R8 // Store prime number at address pointed by R8 INC R8 // Increment prime count // Check if 100 primes are found SET R7 100 EQ R8 R7 JF increment // If not 100 primes found yet, continue finding JMP end // If 100 primes found, end program increment: INC R1 // Increment number to check for prime JMP start_find_primes // Check next number is_prime: SET R2 1 // Assume number is prime initially SET R3 2 // Start divisor from 2 start_loop: // Label to start the loop // Check if we have exceeded the square root of R1 MUL R4 R3 R3 // R4 = R3 * R3 GT R4 R1 // Set flag if R4 > R1 JT is_prime_end // If not exceeded, continue; else, end loop MOD R6 R1 R3 // R6 = R1 % R3 SET R7 0 EQ R7 R6 // Check if R6 is 0 JT not_prime // If yes, number is not prime INC R3 // Increment divisor JMP start_loop // Repeat loop not_prime: SET R2 0 // Set result to 0 (not prime) is_prime_end: JMP ready_prime end: """)[:10] expected = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' print('All tests passed') |
[1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400]
All tests passed
Testing if the previous output contains the string All tests passed
: True
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
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) For example here is a program to compute the first 20 square numbers (1, 4, 9, 16, 25, ...): SET R1 0 // Counter for storing squares SET R2 1 // Number to square loop: MUL R3 R2 R2 // R3 = R2 * R2 STORE R3 R1 // Store R3 at address R1 INC R1 // Increment address INC R2 // Increment number SET R3 20 EQ R1 R3 // Check if 20 squares are found JF loop // If not 20 squares found yet, continue finding end: HCF // Stop program Write me a python interpreter `evaluate(str)` that returns the resulting memory state after running the program. For example, `evaluate(program)` should return `[1, 4, 9, 16, 25, ...]` for the above program.
Here's a Python implementation of an interpreter for the described 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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers memory = [0] * 100 # 100 memory addresses flag = False # Flag # Preprocess: create label map labels = {} lines = program.split('\n') for i, line in enumerate(lines): line = line.strip() if line.endswith(':'): labels[line[:-1]] = i # Helper function to get value (either from register or as constant) def get_value(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Main execution loop ip = 0 # instruction pointer while ip < len(lines): line = lines[ip].strip() # Skip empty lines and labels if not line or line.endswith(':'): ip += 1 continue # Split instruction parts = line.split('//', 1)[0].split() # Skip comments or empty lines if not parts: ip += 1 continue op = parts[0] # Instruction handling if op == 'SET': registers[int(parts[1][1]) - 1] = get_value(parts[2]) elif op == 'ADD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) + get_value(parts[3]) elif op == 'SUB': registers[int(parts[1][1]) - 1] = get_value(parts[2]) - get_value(parts[3]) elif op == 'MUL': registers[int(parts[1][1]) - 1] = get_value(parts[2]) * get_value(parts[3]) elif op == 'DIV': registers[int(parts[1][1]) - 1] = get_value(parts[2]) // get_value(parts[3]) elif op == 'MOD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) % get_value(parts[3]) elif op == 'EQ': flag = get_value(parts[1]) == get_value(parts[2]) elif op == 'NEQ': flag = get_value(parts[1]) != get_value(parts[2]) elif op == 'LT': flag = get_value(parts[1]) < get_value(parts[2]) elif op == 'LTE': flag = get_value(parts[1]) <= get_value(parts[2]) elif op == 'GT': flag = get_value(parts[1]) > get_value(parts[2]) elif op == 'GTE': flag = get_value(parts[1]) >= get_value(parts[2]) elif op == 'INC': registers[int(parts[1][1]) - 1] += 1 elif op == 'DEC': registers[int(parts[1][1]) - 1] -= 1 elif op == 'JMP': ip = labels[parts[1]] continue elif op == 'JT': if flag: ip = labels[parts[1]] continue elif op == 'JF': if not flag: ip = labels[parts[1]] continue elif op == 'LOAD': registers[int(parts[1][1]) - 1] = memory[get_value(parts[2])] elif op == 'STORE': memory[get_value(parts[2])] = get_value(parts[1]) elif op == 'HCF': break ip += 1 return memory # Test the square numbers program program = """ SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop end: HCF """ print(evaluate(program)[:20]) # Print first 20 square numbers |
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 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers memory = [0] * 100 # 100 memory addresses flag = False # Flag # Preprocess: create label map labels = {} lines = program.split('\n') for i, line in enumerate(lines): line = line.strip() if line.endswith(':'): labels[line[:-1]] = i # Helper function to get value (either from register or as constant) def get_value(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Main execution loop ip = 0 # instruction pointer while ip < len(lines): line = lines[ip].strip() # Skip empty lines and labels if not line or line.endswith(':'): ip += 1 continue # Split instruction parts = line.split('//', 1)[0].split() # Skip comments or empty lines if not parts: ip += 1 continue op = parts[0] # Instruction handling if op == 'SET': registers[int(parts[1][1]) - 1] = get_value(parts[2]) elif op == 'ADD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) + get_value(parts[3]) elif op == 'SUB': registers[int(parts[1][1]) - 1] = get_value(parts[2]) - get_value(parts[3]) elif op == 'MUL': registers[int(parts[1][1]) - 1] = get_value(parts[2]) * get_value(parts[3]) elif op == 'DIV': registers[int(parts[1][1]) - 1] = get_value(parts[2]) // get_value(parts[3]) elif op == 'MOD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) % get_value(parts[3]) elif op == 'EQ': flag = get_value(parts[1]) == get_value(parts[2]) elif op == 'NEQ': flag = get_value(parts[1]) != get_value(parts[2]) elif op == 'LT': flag = get_value(parts[1]) < get_value(parts[2]) elif op == 'LTE': flag = get_value(parts[1]) <= get_value(parts[2]) elif op == 'GT': flag = get_value(parts[1]) > get_value(parts[2]) elif op == 'GTE': flag = get_value(parts[1]) >= get_value(parts[2]) elif op == 'INC': registers[int(parts[1][1]) - 1] += 1 elif op == 'DEC': registers[int(parts[1][1]) - 1] -= 1 elif op == 'JMP': ip = labels[parts[1]] continue elif op == 'JT': if flag: ip = labels[parts[1]] continue elif op == 'JF': if not flag: ip = labels[parts[1]] continue elif op == 'LOAD': registers[int(parts[1][1]) - 1] = memory[get_value(parts[2])] elif op == 'STORE': memory[get_value(parts[2])] = get_value(parts[1]) elif op == 'HCF': break ip += 1 return memory # Test the square numbers program program = """ SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop end: HCF """ print(evaluate(program)[:20]) # Print first 20 square numbers |
Running the following 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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | def evaluate(program): # Initialize state registers = [0] * 8 # 8 registers memory = [0] * 100 # 100 memory addresses flag = False # Flag # Preprocess: create label map labels = {} lines = program.split('\n') for i, line in enumerate(lines): line = line.strip() if line.endswith(':'): labels[line[:-1]] = i # Helper function to get value (either from register or as constant) def get_value(arg): if arg.startswith('R'): return registers[int(arg[1]) - 1] return int(arg) # Main execution loop ip = 0 # instruction pointer while ip < len(lines): line = lines[ip].strip() # Skip empty lines and labels if not line or line.endswith(':'): ip += 1 continue # Split instruction parts = line.split('//', 1)[0].split() # Skip comments or empty lines if not parts: ip += 1 continue op = parts[0] # Instruction handling if op == 'SET': registers[int(parts[1][1]) - 1] = get_value(parts[2]) elif op == 'ADD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) + get_value(parts[3]) elif op == 'SUB': registers[int(parts[1][1]) - 1] = get_value(parts[2]) - get_value(parts[3]) elif op == 'MUL': registers[int(parts[1][1]) - 1] = get_value(parts[2]) * get_value(parts[3]) elif op == 'DIV': registers[int(parts[1][1]) - 1] = get_value(parts[2]) // get_value(parts[3]) elif op == 'MOD': registers[int(parts[1][1]) - 1] = get_value(parts[2]) % get_value(parts[3]) elif op == 'EQ': flag = get_value(parts[1]) == get_value(parts[2]) elif op == 'NEQ': flag = get_value(parts[1]) != get_value(parts[2]) elif op == 'LT': flag = get_value(parts[1]) < get_value(parts[2]) elif op == 'LTE': flag = get_value(parts[1]) <= get_value(parts[2]) elif op == 'GT': flag = get_value(parts[1]) > get_value(parts[2]) elif op == 'GTE': flag = get_value(parts[1]) >= get_value(parts[2]) elif op == 'INC': registers[int(parts[1][1]) - 1] += 1 elif op == 'DEC': registers[int(parts[1][1]) - 1] -= 1 elif op == 'JMP': ip = labels[parts[1]] continue elif op == 'JT': if flag: ip = labels[parts[1]] continue elif op == 'JF': if not flag: ip = labels[parts[1]] continue elif op == 'LOAD': registers[int(parts[1][1]) - 1] = memory[get_value(parts[2])] elif op == 'STORE': memory[get_value(parts[2])] = get_value(parts[1]) elif op == 'HCF': break ip += 1 return memory # Test the square numbers program program = """ SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop end: HCF """ print(evaluate(program)[:20]) # Print first 20 square numbers answer = evaluate(""" SET R1 0 SET R2 1 loop: MUL R3 R2 R2 STORE R3 R1 INC R1 INC R2 SET R3 20 EQ R1 R3 JF loop """)[:10] expected = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' answer = evaluate(""" SET R1 2 // Starting number to check for prime start_find_primes: JMP is_prime // Control will return after executing is_prime with R1 as input and R2 containing the result ready_prime: SET R7 1 EQ R2 R7 // Check if R2 is 1 (prime) JF increment // If not prime, skip storing and increment the number // Store prime number in memory and increment count STORE R1 R8 // Store prime number at address pointed by R8 INC R8 // Increment prime count // Check if 100 primes are found SET R7 100 EQ R8 R7 JF increment // If not 100 primes found yet, continue finding JMP end // If 100 primes found, end program increment: INC R1 // Increment number to check for prime JMP start_find_primes // Check next number is_prime: SET R2 1 // Assume number is prime initially SET R3 2 // Start divisor from 2 start_loop: // Label to start the loop // Check if we have exceeded the square root of R1 MUL R4 R3 R3 // R4 = R3 * R3 GT R4 R1 // Set flag if R4 > R1 JT is_prime_end // If not exceeded, continue; else, end loop MOD R6 R1 R3 // R6 = R1 % R3 SET R7 0 EQ R7 R6 // Check if R6 is 0 JT not_prime // If yes, number is not prime INC R3 // Increment divisor JMP start_loop // Repeat loop not_prime: SET R2 0 // Set result to 0 (not prime) is_prime_end: JMP ready_prime end: """)[:10] expected = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29] assert answer == expected, f'Wrong answer; got {answer} instead of {expected}' print('All tests passed') |
[1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400]
Traceback (most recent call last):
File "/usr/src/app/main.py", line 151, in <module>
answer = evaluate("""
^^^^^^^^^^^^
File "/usr/src/app/main.py", line 86, in evaluate
ip = labels[parts[1]]
~~~~~~^^^^^^^^^^
KeyError: 'start_loop'
Testing if the previous output contains the string All tests passed
: False