int instruction_or(struct s_cpu *cpu, struct s_process *proc) {
  uint8_t pcb;
  uint8_t uvar1;
  int ivar2;
  int type;
  int uvar3;
  int uvar4;
  int uvar5;
  int local_40;
  int local_34;

  pcb = read_mem_1(cpu->program, proc->pc + 1);
  uvar4 = check_pcb(pcb, 7);
  if (uvar4 != 0) {
    type = type_from_pcb(pcb, 0);
    ivar2 = size_from_pt(type, 7);
    if (type == T_REG) {
      uvar1 = read_mem_1(cpu->program, proc->pc + 2);
      type = validate_register(uvar1);
      if (type == 0) {
        type = proc->pc;
        uvar3 = size_from_pcb(pcb, 7);
        if (f_verbose & OPT_PCMOVE) {
          print_adv(cpu, proc, type + 2 + uvar3);
        }
        return type + 2 + uvar3;
      }
      uvar4 = read_reg(proc, uvar1);
      local_34 = uvar4;
    } else {
      if (type == T_IND) {
        local_34 =
            read_indirect(cpu, proc, read_mem_2(cpu->program, proc->pc + 2));
      } else {
        local_34 = (int)read_mem_4(cpu->program, proc->pc + 2);
      }
    }
    type = type_from_pcb(pcb, 1);
    uvar4 = size_from_pt(type, 7);
    if (type == T_REG) {
      uvar1 = read_mem_1(cpu->program, proc->pc + 2 + ivar2);
      type = validate_register(uvar1);
      if (type == 0) {
        type = proc->pc;
        uvar3 = size_from_pcb(pcb, 7);
        if (f_verbose & OPT_PCMOVE) {
          print_adv(cpu, proc, type + 2 + uvar3);
        }
        return type + 2 + uvar3;
      }
      uvar5 = read_reg(proc, uvar1);
      local_40 = uvar5;
    } else {
      if (type == T_IND) {
        local_40 = read_indirect(
            cpu, proc, read_mem_2(cpu->program, proc->pc + 2 + ivar2));
      } else {
        local_40 = (int)read_mem_4(cpu->program, proc->pc + 2 + ivar2);
      }
    }
    uvar1 = read_mem_1(cpu->program, proc->pc + 2 + ivar2 + uvar4);
    type = validate_register(uvar1);
    if (type == 0) {
      type = proc->pc;
      uvar3 = size_from_pcb(pcb, 7);
      if (f_verbose & OPT_PCMOVE) {
        print_adv(cpu, proc, type + 2 + uvar3);
      }
      return type + 2 + uvar3;
    }
    if (f_verbose & OPT_INSTR)
      printf("P% 5d | or %d %d r%d\n", proc->pid, local_34, local_40, uvar1);
    mod_carry(proc, (local_34 | local_40) == 0);
    write_reg(proc, uvar1, (local_34 | local_40));
  }
  type = proc->pc;
  uvar3 = size_from_pcb(pcb, 6);
  if (f_verbose & OPT_PCMOVE)
    print_adv(cpu, proc, type + 2 + uvar3);
  return type + 2 + uvar3;
}