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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.     // Define CPU registers
  5.     int registers[4] = {0}; // Four general-purpose registers
  6.  
  7.     // Program memory (instructions)
  8.     int program[] = {0x1001, 0x2002, 0x3003, 0x4000}; // Sample instructions
  9.  
  10.     // Instruction pointer
  11.     int ip = 0;
  12.  
  13.     // Emulation loop
  14.     while (program[ip] != 0) {
  15.         int instruction = program[ip];
  16.         int opcode = (instruction >> 12) & 0xF;
  17.         int operand1 = (instruction >> 8) & 0xF;
  18.         int operand2 = instruction & 0xFF;
  19.  
  20.         switch (opcode) {
  21.             case 0x1: // Add
  22.                 registers[operand1] += operand2;
  23.                 break;
  24.             case 0x2: // Subtract
  25.                 registers[operand1] -= operand2;
  26.                 break;
  27.             case 0x3: // Jump if zero
  28.                 if (registers[operand1] == 0) {
  29.                     ip = operand2;
  30.                     continue; // Skip incrementing instruction pointer
  31.                 }
  32.                 break;
  33.             case 0x4: // Halt
  34.                 return 0;
  35.         }
  36.         ip++;
  37.     }
  38.  
  39.     for (int i=0; i<4; i++){
  40.         printf("registers[%d] = %d\n", i, registers[i]);
  41.     }
  42.     return 0;
  43. }
Success #stdin #stdout 0s 5308KB
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https://ideone.com/t7cqKD
language:
C (gcc 8.3)
created:
17 days ago
visibility:
public

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