How to use _get_primary method in lisa

Best Python code snippet using lisa_python

virtualMachineLibrary.py

Source:virtualMachineLibrary.py

2class VirtualMachineLibrary:3    """4    Main class to map the Virtual Machine intermediate language to Hack machine language5    """6    def _get_primary(operation, a=None, b=None, treat_a_as_pointer=True, treat_b_as_pointer=True):7        """8        Define primary operations, which are going to be main building "blocks" of higher instructions9        """10        bytecode_dictionary = {11            "sp++": ["@SP", "M=M+1"],12            "sp--": ["@SP", "M=M-1"],13        }14        if operation == "*a=*b":15            load_b_into_d = [f"@{b}", "D=M"]16            if treat_b_as_pointer:17                load_b_into_d.insert(1, "A=M")18            load_d_into_a = [f"@{a}", "M=D"]19            if treat_a_as_pointer:20                load_d_into_a.insert(1, "A=M")21            load_b_into_a = load_b_into_d + load_d_into_a22            return load_b_into_a23        else:24            return bytecode_dictionary[operation]25    def get_arithmetic(instruction, function_block, file_name, total_instructions):26        """27        Returns bytecode for arithmetic instructions28        add | x + y29        sub | x - y30        neg | - y31        eq  | x == y32        gt  | x > y33        lt  | y < x34        and | x && y35        or  | x || y36        not | !y37        """38        direct_arithmetic_commands = {"add": "+", "sub": "-", "and": "&", "or": "|"}39        conditional_arithmetic_commands = {"eq": "JEQ", "gt": "JGT", "lt": "JLT"}  # I can just preppend "J" to the type and .upper(), because they match, but the symmetry would be ruined40        unary_commands = ["neg", "not"]41        final_bytecode = []42        if instruction in direct_arithmetic_commands:43            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp--"))  # sp--44            final_bytecode.extend(["@SP", "A=M", "D=M"])  # D=*sp45            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp--"))  # sp--46            final_bytecode.extend(47                ["@SP", "A=M", f"D=M{direct_arithmetic_commands[instruction]}D"])  # D=*sp (operand)  D48            final_bytecode.extend(["@SP", "A=M", "M=D"])  # *sp = D49            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp++"))  # sp++50        elif instruction in conditional_arithmetic_commands:51            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp--"))  # sp--52            final_bytecode.extend(["@SP", "A=M", "D=M"])  # D=*sp53            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp--"))  # sp--54            final_bytecode.extend(["@SP", "A=M", "D=M-D"])  # D=*sp -  D55            write_none_label = ":".join([file_name, function_block, str(total_instructions + 17), "WRITENONE"])56            increment_sp_label = ":".join([file_name, function_block, str(total_instructions + 20), "INCREMENTSP"])57            final_bytecode.extend([f"@{write_none_label}",58                                   f"D;{conditional_arithmetic_commands[instruction]}"])  # @WRITENONE, jump if the corresponding condition matches with D"s (x-y) value59            final_bytecode.extend(["@SP", "A=M", "M=0"])  # (WRITEZERO) block, *sp=0 (false)60            final_bytecode.extend(61                [f"@{increment_sp_label}", "0;JMP"])  # Jump instantly to sp++ part, skipping write -162            final_bytecode.extend([f"({write_none_label})", "@SP", "A=M", "M=-1"])  # (WRITENONE) block, *sp=-1 (true)63            64            final_bytecode.extend([f"({increment_sp_label})"])65            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp++"))  # sp++66        else:  # unary command67            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp--"))  # sp--68            final_bytecode.extend(["@SP", "A=M", "D=M"])  # D=*sp69            if instruction == "not":70                final_bytecode.extend(["@SP", "A=M", "M=!D"])  # *sp = !D71            else:72                final_bytecode.extend(["@SP", "A=M", "M=-D"])73            final_bytecode.extend(VirtualMachineLibrary._get_primary("sp++"))  # sp++74        return final_bytecode75    def get_memory(instruction, file_name):76        """77        Returns the full memory access bytecode, which consists of:78        1. Loading address calculation in R1379        2. Decrementing SP, if pop else saving R13"s content into current SP available location80        3. Saving SP value in R13, if pop else incrementing SP81        """82        instruction_structure = instruction.split()83        instruction_type = instruction_structure[0]84        segment = instruction_structure[1]85       86        index = instruction_structure[2]87       88        calculated_address_bytecode = VirtualMachineLibrary._get_address_calculation(segment, index, file_name)89        if instruction_type == "push":90            treat_b_as_pointer = segment != "constant"  # If we don"t have a constant segment, then b (R13 in this case) must be treated as a pointer91            save_R13_into_stack_bytecode = VirtualMachineLibrary._get_primary("*a=*b", a="SP", b="R13",92                                                                              treat_b_as_pointer=treat_b_as_pointer)93            increment_sp = VirtualMachineLibrary._get_primary("sp++")94            return calculated_address_bytecode + save_R13_into_stack_bytecode + increment_sp95        else:96            decrement_sp = VirtualMachineLibrary._get_primary("sp--")97            save_stack_into_R13 = VirtualMachineLibrary._get_primary("*a=*b", a="R13", b="SP")98            return calculated_address_bytecode + decrement_sp + save_stack_into_R1399    def _get_address_calculation(segment, index, file_name):100        """101        Returns bytecode that loads address calculation (segment base address + index) in R13102        """103        if segment == "constant":  # Temp starts at 5104            load_bytecode = [f"@{index}", "D=A"]105        elif segment == "temp":106            load_bytecode = [f"@{int(index) + 5}", "D=A"]107        elif segment == "static":108            variable_name = file_name + "." + index109            load_bytecode = [f"@{variable_name}", "D=A"]110        elif segment == "pointer":111            if index == "0":112                register = "THIS"113            else:114                register = "THAT"115            load_bytecode = [f"@{register}", "D=A"]116        else:117            load_bytecode = [f"@{VirtualMachineLibrary._get_symbolic_symbol(segment)}", "D=M", f"@{index}", "D=D+A"]118        full_address_bytecode = load_bytecode + ["@R13", "M=D"]119        return full_address_bytecode120    def _get_symbolic_symbol(segment):121        """122        Returns Hack symbolic symbol equivalents123        """124        bytecode_dictionary = {125            "local": "LCL",126            "argument": "ARG",127            "this": "THIS",128            "that": "THAT",129        }130        try:131            return bytecode_dictionary[segment]132        except:  # If the segment is not available, it is most likely a variable, so just return it133            return segment134    def get_program_flow(instruction, label, function_block):135        """136        Returns full program flow instruction bytecode137        1. goto label138        2. label139        3. if-goto label140        """141        if instruction == "label":  # Set a label142            bytecode = [f"({function_block}{'$' if function_block else ''}{label})"]143        elif instruction == "goto": # Unconditional jumping144            bytecode = [f"@{label}", "0;JMP"]145        else: # Conditional jumping146            bytecode = []147            # Pop into D148            bytecode.extend(VirtualMachineLibrary._get_primary("sp--"))149            bytecode.extend(["@SP", "A=M", "D=M"])150            # Jump if D is not 0151            bytecode.extend([f"@{function_block}{('$' if function_block else '')}{label}", "D;JNE"])152        return bytecode153    def get_function(instruction_structure, total_instructions, file_name):154        """155        Returns full function instruction bytecode156        function function_name lVars157        call function_name nArgs158        return159        """160        state = ["LCL", "ARG", "THIS", "THAT"]161        instruction = instruction_structure[0]162        if instruction == "function":163            function_name = instruction_structure[1]164            vars_count = int(instruction_structure[2])165            166            bytecode = []167            168            # Start a function block169            bytecode.extend([f"({function_name})"])170            for _ in range(vars_count):171                bytecode.extend(VirtualMachineLibrary.get_memory("push constant 0", file_name)) 172        elif instruction == "call": 173            function_name = instruction_structure[1]174            args_count = instruction_structure[2]175            176            bytecode = []177            178            return_label = ":".join([file_name, function_name, str(total_instructions), "RETURN"])179            # Push return address180            bytecode.extend([f"@{return_label}"])181            bytecode.extend(["D=A", "@SP", "A=M", "M=D"])182            bytecode.extend(VirtualMachineLibrary._get_primary("sp++"))183            # Save state184            for address in state:185                bytecode.extend([f"@{address}", "D=M", "@R13", "M=D"])186                bytecode.extend(VirtualMachineLibrary._get_primary("*a=*b", a="SP", b="R13", treat_b_as_pointer=False))187                bytecode.extend(VirtualMachineLibrary._get_primary("sp++"))188            # Set ARG to point to new base address (sp - 5 - args_count)189            bytecode.extend(["@SP", "D=M", "@5", "D=D-A", f"@{args_count}", "D=D-A", "@ARG", "M=D"])190            191            # Set LCL to point to current SP192            bytecode.extend(["@SP", "D=M", "@LCL", "M=D"])193            194            # Jump to function_name195            bytecode.extend([f"@{function_name}", "0;JMP"])196            197            # Set return label198            bytecode.extend([f"({return_label})"])199            bytecode = bytecode200        else:201            bytecode = []202            # Set R13 to point to callee"s LCL203            bytecode.extend(["@LCL", "D=M", "@R13", "M=D"])204            # Set R14 to return address205            bytecode.extend(["@R13", "D=M", "@5", "D=D-A", "A=D", "D=M", "@R14", "M=D"])206            # Set first callee"s argument to be return value207            bytecode.extend(VirtualMachineLibrary._get_primary("sp--"))208            bytecode.extend(VirtualMachineLibrary._get_primary("*a=*b", a="ARG", b="SP"))209            # Reposition SP to be after first callee"s argument210            bytecode.extend(["@ARG", "D=M+1", "@SP", "M=D"])211            212            # Restore registers213            for index, address in enumerate(reversed(state)):214                bytecode.extend(["@R13", "D=M", f"@{int(index) + 1}", "D=D-A", "A=D", "D=M", f"@{address}", "M=D"])215            216            # Return jump217            bytecode.extend(["@R14", "A=M", "0;JMP"])218        ...

screen.py

Source:screen.py

...102            'd': self.double_page,103            'f': self.justify_full,104            'e': self.hyphenation105        }106    def _get_primary(self):107        if self.dark_mode:108            return curses.color_pair(6)109        else:110            return curses.color_pair(1)111    def _get_modes_info(self):112        modes_info = '['113        for mode in self.modes.keys():114            if self.modes[mode]:115                modes_info += mode116            else:117                modes_info += '-'118        modes_info += ']'119        return modes_info120    def get_screen(self):121        return self.screen122    def _shorten(self, text, bracer='', text_after=''):123        text_end = '...' + bracer124        if len(text) >= self.max_x - self.padding * 2 - len(text_after):125            return text[:self.max_x - self.padding * 2 - len(text_end) - len(text_after)] + text_end126        else:127            return text128    def _print_info(self):129        app_text = Constant.APP + ' ' + Constant.VERSION130        title_text = '[' + self.title + ']'131        if not self.is_dict_installed:132            language_text = '[*' + self.language + ']'133        else:134            language_text = '[' + self.language + ']'135        keys =  'modes:' + self._get_modes_info() + ' quit:[q] help:[?]'136        if self.max_x <= len(keys) + len(app_text) + 4:137            app_text = Constant.SHORT_APP + ' ' + Constant.VERSION138        if self.max_x <= len(keys) + len(app_text) + 4:139            keys = self._get_modes_info() + '[?]'140        if self.max_x > len(keys) + len(app_text) + 4:141            self.screen.addstr(0, 2, self._shorten(app_text), self._get_primary())142            self.screen.addstr(143                0,144                self.max_x - len(keys) - self.padding,145                keys,146                self._get_primary()147            )148        else:149            self.screen.addstr(150                0,151                self.max_x - len(keys) - self.padding,152                keys,153                self._get_primary()154            )155        self.screen.addstr(156            self.max_y - 1,157            self.padding,158            self._shorten(title_text, ']', language_text),159            self._get_primary()160        )161        self.screen.addstr(162            self.max_y - 1,163            self.max_x - len(language_text) - self.padding,164            language_text,165            self._get_primary()166        )167    def redraw(self):168        self.screen.erase()169        self.screen.bkgd(' ', self._get_primary())170        try:171            self._print_info()172        except:173            pass...

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