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Irmen de Jong
761
python-prototype/tinyvm/vm.py
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761
python-prototype/tinyvm/vm.py
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@@ -0,0 +1,761 @@
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"""
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Simplistic 8/16 bit Virtual Machine to execute a stack based instruction language.
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This is the VM itself (execution engine)
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Written by Irmen de Jong (irmen@razorvine.net) - license: GNU GPL 3.0
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"""
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# 8/16 bit virtual machine
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# machine specs:
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# MEMORY: 64K bytes, treated as one single array, indexed per byte, ONLY DATA - NO CODE
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# elements addressable as one of three elementary data types:
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# 8-bit byte (singed and unsigned),
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# 16-bit words (two 8-bit bytes, signed and unsigned) (stored in LSB order),
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# 5-byte MFLPT floating point
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# addressing is possible via byte index (for the $0000-$00ff range) or via an unsigned word.
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# there is NO memory management at all; all of the mem is globally shared and always available in full.
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# certain blocks of memory can be marked as read-only (write attempts will then crash the vm)
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#
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# MEMORY ACCESS: via explicit load and store instructions,
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# to put a value onto the stack or store the value on the top of the stack,
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# or in one of the dynamic variables.
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#
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# I/O: either via programmed I/O routines:
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# write [byte/bytearray to text output/screen] : syscall_printstr / syscall_printchr,
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# read [byte/bytearray from keyboard] : syscall_input / syscall_getchr (both blocking)
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# or via memory-mapped I/O (text screen matrix, keyboard scan register)
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#
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# CPU: single threaded, stack based execution,
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# no registers, but unlimited dynamic variables (v0, v1, ...) that have a value and a type.
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# types:
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# 1-bit boolean,
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# 8-bit byte (singed and unsigned),
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# 16-bit words (two 8-bit bytes, signed and unsigned),
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# floating point,
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# array of bytes (signed and unsigned),
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# array of words (signed and unsigned),
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# matrix (2-dimensional array) of bytes (signed and unsigned).
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# all of these can have the flag CONST as well which means they cannot be modified.
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#
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# CPU INSTRUCTIONS:
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# stack manipulation mainly:
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# nop
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# push var / push2 var1, var2
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# pop var / pop2 var1, var2
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# various arithmetic operations, logical operations, boolean test and comparison operations
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# jump label
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# jump_if_true label, jump_if_false label
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# jump_if_status_XX label special system dependent status register conditional check such as carry bit or overflow bit)
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# call function (arguments are on stack)
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# return (return values on stack)
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# syscall function (special system dependent implementation)
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#
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# TIMER 'INTERRUPT': triggered around each 1/60th of a second.
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# executes on a DIFFERENT stack and with a different PROGRAM LIST,
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# but with access to ALL THE SAME DYNAMIC VARIABLES.
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# This suspends the main program until the timer program RETURNs!
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#
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import time
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import itertools
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import collections
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import array
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import threading
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import pprint
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import tkinter
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import tkinter.font
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from typing import Dict, List, Tuple, Union, no_type_check
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from .program import Instruction, Variable, Block, Program, Opcode, Value
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from .core import Memory, DataType, TerminateExecution, ExecutionError
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class CallFrameMarker:
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__slots__ = ["returninstruction"]
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def __init__(self, instruction: Instruction) -> None:
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self.returninstruction = instruction
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def __str__(self) -> str:
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return repr(self)
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def __repr__(self) -> str:
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return "<CallFrameMarker returninstruction={:s}>".format(str(self.returninstruction))
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StackValueType = Union[Value, CallFrameMarker]
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class Stack:
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def __init__(self):
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self.stack = []
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self.pop_history = collections.deque(maxlen=10)
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def debug_peek(self, size: int) -> List[StackValueType]:
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return self.stack[-size:]
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def size(self) -> int:
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return len(self.stack)
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def pop(self) -> StackValueType:
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x = self.stack.pop()
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self.pop_history.append(x)
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return x
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def pop2(self) -> Tuple[StackValueType, StackValueType]:
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x, y = self.stack.pop(), self.stack.pop()
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self.pop_history.append(x)
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self.pop_history.append(y)
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return x, y
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def pop3(self) -> Tuple[StackValueType, StackValueType, StackValueType]:
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x, y, z = self.stack.pop(), self.stack.pop(), self.stack.pop()
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self.pop_history.append(x)
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self.pop_history.append(y)
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self.pop_history.append(z)
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return x, y, z
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def pop_under(self, number: int) -> StackValueType:
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return self.stack.pop(-1-number)
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def push(self, item: StackValueType) -> None:
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self._typecheck(item)
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self.stack.append(item)
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def push2(self, first: StackValueType, second: StackValueType) -> None:
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self._typecheck(first)
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self._typecheck(second)
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self.stack.append(first)
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self.stack.append(second)
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def push3(self, first: StackValueType, second: StackValueType, third: StackValueType) -> None:
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self._typecheck(first)
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self._typecheck(second)
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self._typecheck(third)
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self.stack.extend([first, second, third])
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def push_under(self, number: int, value: StackValueType) -> None:
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self.stack.insert(-number, value)
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def peek(self) -> StackValueType:
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return self.stack[-1] if self.stack else None
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def swap(self) -> None:
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x = self.stack[-1]
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self.stack[-1] = self.stack[-2]
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self.stack[-2] = x
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def _typecheck(self, value: StackValueType):
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if not isinstance(value, (Value, CallFrameMarker)):
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raise TypeError("invalid item type pushed", value)
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# noinspection PyPep8Naming,PyUnusedLocal,PyMethodMayBeStatic
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class VM:
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str_encoding = "iso-8859-15"
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str_alt_encoding = "iso-8859-15"
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readonly_mem_ranges = [] # type: List[Tuple[int, int]]
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timer_irq_resolution = 1/30
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charout_address = 0xd000
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charin_address = 0xd001
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def __init__(self, program: Program, timerprogram: Program=None) -> None:
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for opcode in Opcode:
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if opcode not in self.dispatch_table:
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raise NotImplementedError("missing opcode dispatch for " + opcode.name)
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for oc in Opcode:
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if oc not in self.dispatch_table:
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raise NotImplementedError("no dispatch entry in table for " + oc.name)
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self.memory = Memory()
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self.memory.memmapped_io_charout(self.charout_address, self.memmapped_charout)
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self.memory.memmapped_io_charin(self.charin_address, self.memmapped_charin)
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for start, end in self.readonly_mem_ranges:
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self.memory.mark_readonly(start, end)
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self.main_stack = Stack()
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self.timer_stack = Stack()
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self.main_program, self.timer_program, self.variables, self.labels = self.flatten_programs(program, timerprogram or Program([]))
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self.connect_instruction_pointers(self.main_program)
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self.connect_instruction_pointers(self.timer_program)
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self.program = self.main_program
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self.stack = self.main_stack
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self.pc = None # type: Instruction
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self.charscreen_address = 0
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self.charscreen_width = 0
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self.charscreen_height = 0
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self.keyboard_scancode = 0
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self.system = System(self)
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assert all(i.next for i in self.main_program
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if i.opcode != Opcode.TERMINATE), "main: all instrs next must be set"
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assert all(i.next for i in self.timer_program
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if i.opcode not in (Opcode.TERMINATE, Opcode.RETURN)), "timer: all instrs next must be set"
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assert all(i.alt_next for i in self.main_program
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if i.opcode in (Opcode.CALL, Opcode.JUMP_IF_FALSE, Opcode.JUMP_IF_TRUE)), "main: alt_nexts must be set"
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assert all(i.alt_next for i in self.timer_program
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if i.opcode in (Opcode.CALL, Opcode.JUMP_IF_FALSE, Opcode.JUMP_IF_TRUE)), "timer: alt_nexts must be set"
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print("[TinyVM starting up.]")
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def enable_charscreen(self, screen_address: int, width: int, height: int) -> None:
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self.charscreen_address = screen_address
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self.charscreen_width, self.charscreen_height = width, height
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def flatten_programs(self, main: Program, timer: Program) \
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-> Tuple[List[Instruction], List[Instruction], Dict[str, Variable], Dict[str, Instruction]]:
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variables = {} # type: Dict[str, Variable]
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labels = {} # type: Dict[str, Instruction]
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instructions_main = [] # type: List[Instruction]
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instructions_timer = [] # type: List[Instruction]
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for block in main.blocks:
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flat = self.flatten(block, variables, labels)
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instructions_main.extend(flat)
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instructions_main.append(Instruction(Opcode.TERMINATE, [], None, None))
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for block in timer.blocks:
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flat = self.flatten(block, variables, labels)
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instructions_timer.extend(flat)
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return instructions_main, instructions_timer, variables, labels
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def flatten(self, block: Block, variables: Dict[str, Variable], labels: Dict[str, Instruction]) -> List[Instruction]:
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def block_prefix(b: Block) -> str:
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if b.parent:
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return block_prefix(b.parent) + "." + b.name
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else:
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return b.name
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prefix = block_prefix(block)
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instructions = block.instructions
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for ins in instructions:
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if ins.opcode == Opcode.SYSCALL:
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continue
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if ins.args:
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newargs = [] # type: List[Union[str, int, Value]]
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for a in ins.args:
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if isinstance(a, str):
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newargs.append(prefix + "." + a)
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else:
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newargs.append(a) # type: ignore
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ins.args = newargs
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for vardef in block.variables:
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vname = prefix + "." + vardef.name
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assert vname not in variables
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variables[vname] = vardef
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for name, instr in block.labels.items():
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name = prefix + "." + name
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assert name not in labels
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labels[name] = instr
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for subblock in block.blocks:
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instructions.extend(self.flatten(subblock, variables, labels))
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del block.instructions
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del block.variables
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del block.labels
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return instructions
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def connect_instruction_pointers(self, instructions: List[Instruction]) -> None:
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i1, i2 = itertools.tee(instructions)
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next(i2, None)
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for i, nexti in itertools.zip_longest(i1, i2):
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if i.opcode in (Opcode.JUMP_IF_TRUE, Opcode.JUMP_IF_FALSE):
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i.next = nexti # normal flow target
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i.alt_next = self.labels[i.args[0]] # conditional jump target
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elif i.opcode == Opcode.JUMP:
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i.next = self.labels[i.args[0]] # jump target
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elif i.opcode == Opcode.CALL:
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i.next = self.labels[i.args[1]] # call target
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i.alt_next = nexti # return instruction
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else:
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i.next = nexti
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def run(self) -> None:
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if self.charscreen_address:
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threading.Thread(target=ScreenViewer.create,
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args=(self, self.charscreen_address, self.charscreen_width, self.charscreen_height),
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name="screenviewer", daemon=True).start()
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time.sleep(0.05)
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self.pc = self.program[0] # first instruction of the main program
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self.stack.push(CallFrameMarker(None)) # enter the call frame so the timer program can end with a RETURN
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try:
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counter = 0
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previous_timer_irq = time.perf_counter()
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while self.pc is not None:
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next_pc = self.dispatch_table[self.pc.opcode](self, self.pc)
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if next_pc:
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self.pc = self.pc.next
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counter += 1
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if self.charscreen_address and counter % 1000 == 0:
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time.sleep(0.001) # allow the tkinter window to update
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time_since_irq = time.perf_counter() - previous_timer_irq
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if time_since_irq > 1/60:
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self.timer_irq()
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previous_timer_irq = time.perf_counter()
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except TerminateExecution as x:
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why = str(x)
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print("[TinyVM execution terminated{:s}]\n".format(": "+why if why else "."))
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return
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except Exception as x:
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print("EXECUTION ERROR")
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self.debug_stack(5)
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raise
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else:
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print("[TinyVM execution ended.]")
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def timer_irq(self) -> None:
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# This is the timer 'irq' handler. It is called to run the timer program at a certain interval.
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# During the execution the main program is halted
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if self.timer_program:
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previous_pc = self.pc
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previous_program = self.program
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previous_stack = self.stack
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self.stack = self.timer_stack
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self.program = self.timer_program
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self.pc = self.program[0]
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self.stack.push(CallFrameMarker(None)) # enter the call frame so the timer program can end with a RETURN
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while self.pc is not None:
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next_pc = self.dispatch_table[self.pc.opcode](self, self.pc)
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if next_pc:
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self.pc = self.pc.next
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self.pc = previous_pc
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self.program = previous_program
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self.stack = previous_stack
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def debug_stack(self, size: int=5) -> None:
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stack = self.stack.debug_peek(size)
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if len(stack) > 0:
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print("** stack (top {:d}):".format(size))
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for i, value in enumerate(reversed(stack), start=1):
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print(" {:d}. {:s} {:s}".format(i, type(value).__name__, str(value)))
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else:
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print("** stack is empty.")
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if self.stack.pop_history:
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print("** last {:d} values popped from stack (most recent on top):".format(self.stack.pop_history.maxlen))
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pprint.pprint(list(reversed(self.stack.pop_history)), indent=2, compact=True, width=20) # type: ignore
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if self.pc is not None:
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print("* instruction:", self.pc)
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||||
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||||
def memmapped_charout(self, value: int) -> None:
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string = self.system.decodestr(bytearray([value]))
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print(string, end="")
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||||
def memmapped_charin(self) -> int:
|
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return self.keyboard_scancode
|
||||
|
||||
def assign_variable(self, variable: Variable, value: Value) -> None:
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assert not variable.const, "cannot modify a const"
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assert isinstance(value, Value)
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variable.value = value
|
||||
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def opcode_NOP(self, instruction: Instruction) -> bool:
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# do nothing
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return True
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def opcode_TERMINATE(self, instruction: Instruction) -> bool:
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raise TerminateExecution()
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||||
def opcode_PUSH(self, instruction: Instruction) -> bool:
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value = self.variables[instruction.args[0]].value # type: ignore
|
||||
self.stack.push(value)
|
||||
return True
|
||||
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||||
def opcode_DUP(self, instruction: Instruction) -> bool:
|
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self.stack.push(self.stack.peek())
|
||||
return True
|
||||
|
||||
def opcode_DUP2(self, instruction: Instruction) -> bool:
|
||||
x = self.stack.peek()
|
||||
self.stack.push(x)
|
||||
self.stack.push(x)
|
||||
return True
|
||||
|
||||
def opcode_SWAP(self, instruction: Instruction) -> bool:
|
||||
value2, value1 = self.stack.pop2()
|
||||
self.stack.push2(value2, value1)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_PUSH2(self, instruction: Instruction) -> bool:
|
||||
value1 = self.variables[instruction.args[0]].value
|
||||
value2 = self.variables[instruction.args[1]].value
|
||||
self.stack.push2(value1, value2)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_PUSH3(self, instruction: Instruction) -> bool:
|
||||
value1 = self.variables[instruction.args[0]].value
|
||||
value2 = self.variables[instruction.args[1]].value
|
||||
value3 = self.variables[instruction.args[2]].value
|
||||
self.stack.push3(value1, value2, value3)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_POP(self, instruction: Instruction) -> bool:
|
||||
value = self.stack.pop()
|
||||
variable = self.variables[instruction.args[0]]
|
||||
self.assign_variable(variable, value)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_POP2(self, instruction: Instruction) -> bool:
|
||||
value1, value2 = self.stack.pop2()
|
||||
variable = self.variables[instruction.args[0]]
|
||||
self.assign_variable(variable, value1)
|
||||
variable = self.variables[instruction.args[1]]
|
||||
self.assign_variable(variable, value2)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_POP3(self, instruction: Instruction) -> bool:
|
||||
value1, value2, value3 = self.stack.pop3()
|
||||
variable = self.variables[instruction.args[0]]
|
||||
self.assign_variable(variable, value1)
|
||||
variable = self.variables[instruction.args[1]]
|
||||
self.assign_variable(variable, value2)
|
||||
variable = self.variables[instruction.args[2]]
|
||||
self.assign_variable(variable, value3)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_ADD(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(first + second)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_SUB(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(first - second)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_MUL(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(first * second)
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_DIV(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(first / second)
|
||||
return True
|
||||
|
||||
def opcode_AND(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(first and second)
|
||||
return True
|
||||
|
||||
def opcode_OR(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(first or second)
|
||||
return True
|
||||
|
||||
def opcode_XOR(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
ifirst = 1 if first else 0
|
||||
isecond = 1 if second else 0
|
||||
self.stack.push(Value(DataType.BOOL, bool(ifirst ^ isecond)))
|
||||
return True
|
||||
|
||||
def opcode_NOT(self, instruction: Instruction) -> bool:
|
||||
self.stack.push(Value(DataType.BOOL, not self.stack.pop()))
|
||||
return True
|
||||
|
||||
def opcode_TEST(self, instruction: Instruction) -> bool:
|
||||
self.stack.push(Value(DataType.BOOL, bool(self.stack.pop())))
|
||||
return True
|
||||
|
||||
def opcode_CMP_EQ(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(Value(DataType.BOOL, first == second))
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_CMP_LT(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(Value(DataType.BOOL, first < second))
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_CMP_GT(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(Value(DataType.BOOL, first > second))
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_CMP_LTE(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(Value(DataType.BOOL, first <= second))
|
||||
return True
|
||||
|
||||
@no_type_check
|
||||
def opcode_CMP_GTE(self, instruction: Instruction) -> bool:
|
||||
second, first = self.stack.pop2()
|
||||
self.stack.push(Value(DataType.BOOL, first >= second))
|
||||
return True
|
||||
|
||||
def opcode_CALL(self, instruction: Instruction) -> bool:
|
||||
# arguments are already on the stack
|
||||
num_args = instruction.args[0]
|
||||
assert isinstance(num_args, int)
|
||||
self.stack.push_under(num_args, CallFrameMarker(instruction.alt_next))
|
||||
return True
|
||||
|
||||
def opcode_RETURN(self, instruction: Instruction) -> bool:
|
||||
num_returnvalues = instruction.args[0]
|
||||
assert isinstance(num_returnvalues, int)
|
||||
callframe = self.stack.pop_under(num_returnvalues)
|
||||
assert isinstance(callframe, CallFrameMarker), callframe
|
||||
self.pc = callframe.returninstruction
|
||||
return False
|
||||
|
||||
def opcode_SYSCALL(self, instruction: Instruction) -> bool:
|
||||
syscall = instruction.args[0]
|
||||
assert isinstance(syscall, str)
|
||||
call = getattr(self.system, "syscall_" + syscall, None)
|
||||
if call:
|
||||
return call()
|
||||
else:
|
||||
raise RuntimeError("no syscall method for " + syscall)
|
||||
|
||||
def opcode_JUMP(self, instruction: Instruction) -> bool:
|
||||
return True # jump simply points to the next instruction elsewhere
|
||||
|
||||
def opcode_JUMP_IF_TRUE(self, instruction: Instruction) -> bool:
|
||||
result = self.stack.pop()
|
||||
assert isinstance(result, Value)
|
||||
if result.value:
|
||||
self.pc = self.pc.alt_next # alternative next instruction
|
||||
return False
|
||||
return True
|
||||
|
||||
def opcode_JUMP_IF_FALSE(self, instruction: Instruction) -> bool:
|
||||
result = self.stack.pop()
|
||||
if result.value: # type: ignore
|
||||
return True
|
||||
self.pc = self.pc.alt_next # alternative next instruction
|
||||
return False
|
||||
|
||||
def opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG(self, instruction: Instruction) -> bool:
|
||||
raise ExecutionError("unsupported conditional jump", instruction) # @todo implement hardware specific status register flags
|
||||
|
||||
dispatch_table = {
|
||||
Opcode.TERMINATE: opcode_TERMINATE,
|
||||
Opcode.NOP: opcode_NOP,
|
||||
Opcode.PUSH: opcode_PUSH,
|
||||
Opcode.PUSH2: opcode_PUSH2,
|
||||
Opcode.PUSH3: opcode_PUSH3,
|
||||
Opcode.POP: opcode_POP,
|
||||
Opcode.POP2: opcode_POP2,
|
||||
Opcode.POP3: opcode_POP3,
|
||||
Opcode.DUP: opcode_DUP,
|
||||
Opcode.DUP2: opcode_DUP2,
|
||||
Opcode.SWAP: opcode_SWAP,
|
||||
Opcode.ADD: opcode_ADD,
|
||||
Opcode.SUB: opcode_SUB,
|
||||
Opcode.MUL: opcode_MUL,
|
||||
Opcode.DIV: opcode_DIV,
|
||||
Opcode.AND: opcode_AND,
|
||||
Opcode.OR: opcode_OR,
|
||||
Opcode.XOR: opcode_XOR,
|
||||
Opcode.NOT: opcode_NOT,
|
||||
Opcode.TEST: opcode_TEST,
|
||||
Opcode.CMP_EQ: opcode_CMP_EQ,
|
||||
Opcode.CMP_LT: opcode_CMP_LT,
|
||||
Opcode.CMP_GT: opcode_CMP_GT,
|
||||
Opcode.CMP_LTE: opcode_CMP_LTE,
|
||||
Opcode.CMP_GTE: opcode_CMP_GTE,
|
||||
Opcode.CALL: opcode_CALL,
|
||||
Opcode.RETURN: opcode_RETURN,
|
||||
Opcode.SYSCALL: opcode_SYSCALL,
|
||||
Opcode.JUMP: opcode_JUMP,
|
||||
Opcode.JUMP_IF_TRUE: opcode_JUMP_IF_TRUE,
|
||||
Opcode.JUMP_IF_FALSE: opcode_JUMP_IF_FALSE,
|
||||
Opcode.JUMP_IF_STATUS_ZERO: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_NE: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_EQ: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_CC: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_CS: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_VC: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_VS: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_GE: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_LE: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_GT: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_LT: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_POS: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
Opcode.JUMP_IF_STATUS_NEG: opcode_JUMP_IF_STATUS_UNSUPPORTED_FLAG,
|
||||
}
|
||||
|
||||
|
||||
class System:
|
||||
def __init__(self, vm: VM) -> None:
|
||||
self.vm = vm
|
||||
|
||||
def encodestr(self, string: str, alt: bool=False) -> bytearray:
|
||||
return bytearray(string, self.vm.str_alt_encoding if alt else self.vm.str_encoding)
|
||||
|
||||
def decodestr(self, bb: Union[bytearray, array.array], alt: bool=False) -> str:
|
||||
return str(bb, self.vm.str_alt_encoding if alt else self.vm.str_encoding) # type: ignore
|
||||
|
||||
def syscall_printstr(self) -> bool:
|
||||
value = self.vm.stack.pop()
|
||||
assert isinstance(value, Value)
|
||||
if value.dtype == DataType.ARRAY_BYTE:
|
||||
print(self.decodestr(value.value), end="") # type: ignore
|
||||
return True
|
||||
else:
|
||||
raise TypeError("printstr expects bytearray", value)
|
||||
|
||||
def syscall_printchr(self) -> bool:
|
||||
charactervalue = self.vm.stack.pop()
|
||||
assert isinstance(charactervalue, Value)
|
||||
if charactervalue.dtype == DataType.BYTE:
|
||||
print(self.decodestr(bytearray([charactervalue.value])), end="") # type: ignore
|
||||
return True
|
||||
else:
|
||||
raise TypeError("printchr expects BYTE", charactervalue)
|
||||
|
||||
def syscall_input(self) -> bool:
|
||||
self.vm.stack.push(Value(DataType.ARRAY_BYTE, self.encodestr(input())))
|
||||
return True
|
||||
|
||||
def syscall_getchr(self) -> bool:
|
||||
self.vm.stack.push(Value(DataType.BYTE, self.encodestr(input() + '\n')[0]))
|
||||
return True
|
||||
|
||||
def syscall_decimalstr_signed(self) -> bool:
|
||||
value = self.vm.stack.pop()
|
||||
assert isinstance(value, Value)
|
||||
if value.dtype in (DataType.SBYTE, DataType.SWORD):
|
||||
self.vm.stack.push(Value(DataType.ARRAY_BYTE, self.encodestr(str(value.value))))
|
||||
return True
|
||||
else:
|
||||
raise TypeError("decimalstr_signed expects signed int", value)
|
||||
|
||||
def syscall_decimalstr_unsigned(self) -> bool:
|
||||
value = self.vm.stack.pop()
|
||||
assert isinstance(value, Value)
|
||||
if value.dtype in (DataType.BYTE, DataType.WORD):
|
||||
self.vm.stack.push(Value(DataType.ARRAY_BYTE, self.encodestr(str(value.value))))
|
||||
return True
|
||||
else:
|
||||
raise TypeError("decimalstr_signed expects unsigned int", value)
|
||||
|
||||
def syscall_hexstr_signed(self) -> bool:
|
||||
value = self.vm.stack.pop()
|
||||
if type(value) is int:
|
||||
if value >= 0: # type: ignore
|
||||
strvalue = "${:x}".format(value)
|
||||
else:
|
||||
strvalue = "-${:x}".format(-value) # type: ignore
|
||||
self.vm.stack.push(Value(DataType.ARRAY_BYTE, self.encodestr(strvalue)))
|
||||
return True
|
||||
else:
|
||||
raise TypeError("hexstr expects int", value)
|
||||
|
||||
def syscall_memwrite_byte(self) -> bool:
|
||||
value, address = self.vm.stack.pop2()
|
||||
assert isinstance(value, Value) and isinstance(address, Value)
|
||||
assert value.dtype == DataType.BYTE and address.dtype == DataType.WORD
|
||||
self.vm.memory.set_byte(address.value, value.value) # type: ignore
|
||||
return True
|
||||
|
||||
def syscall_memwrite_sbyte(self) -> bool:
|
||||
value, address = self.vm.stack.pop2()
|
||||
assert isinstance(value, Value) and isinstance(address, Value)
|
||||
assert value.dtype == DataType.SBYTE and address.dtype == DataType.WORD
|
||||
self.vm.memory.set_sbyte(address.value, value.value) # type: ignore
|
||||
return True
|
||||
|
||||
def syscall_memwrite_word(self) -> bool:
|
||||
value, address = self.vm.stack.pop2()
|
||||
assert isinstance(value, Value) and isinstance(address, Value)
|
||||
assert value.dtype in (DataType.WORD, DataType.BYTE) and address.dtype == DataType.WORD
|
||||
self.vm.memory.set_word(address.value, value.value) # type: ignore
|
||||
return True
|
||||
|
||||
def syscall_memwrite_sword(self) -> bool:
|
||||
value, address = self.vm.stack.pop2()
|
||||
assert isinstance(value, Value) and isinstance(address, Value)
|
||||
assert value.dtype in (DataType.SWORD, DataType.SBYTE, DataType.BYTE) and address.dtype == DataType.WORD
|
||||
self.vm.memory.set_sword(address.value, value.value) # type: ignore
|
||||
return True
|
||||
|
||||
def syscall_memwrite_float(self) -> bool:
|
||||
value, address = self.vm.stack.pop2()
|
||||
assert isinstance(value, Value) and isinstance(address, Value)
|
||||
assert value.dtype == DataType.FLOAT and address.dtype == DataType.WORD
|
||||
self.vm.memory.set_float(address.value, value.value) # type: ignore
|
||||
return True
|
||||
|
||||
def syscall_memwrite_str(self) -> bool:
|
||||
strbytes, address = self.vm.stack.pop2()
|
||||
assert isinstance(strbytes, Value) and isinstance(address, Value)
|
||||
assert strbytes.dtype == DataType.ARRAY_BYTE and address.dtype == DataType.WORD
|
||||
for i, b in enumerate(strbytes.value): # type: ignore
|
||||
self.vm.memory.set_byte(address+i, b) # type: ignore
|
||||
return True
|
||||
|
||||
def syscall_memread_byte(self) -> bool:
|
||||
address = self.vm.stack.pop()
|
||||
assert isinstance(address, Value)
|
||||
assert address.dtype == DataType.WORD
|
||||
self.vm.stack.push(Value(DataType.BYTE, self.vm.memory.get_byte(address.value))) # type: ignore
|
||||
return True
|
||||
|
||||
def syscall_smalldelay(self) -> bool:
|
||||
time.sleep(1/100)
|
||||
return True
|
||||
|
||||
def syscall_delay(self) -> bool:
|
||||
time.sleep(0.1)
|
||||
return True
|
||||
|
||||
|
||||
class ScreenViewer(tkinter.Tk):
|
||||
def __init__(self, vm: VM, screen_addr: int, screen_width: int, screen_height: int) -> None:
|
||||
super().__init__()
|
||||
self.title("IL65 tinyvm")
|
||||
self.fontsize = 16
|
||||
self.vm = vm
|
||||
self.address = screen_addr
|
||||
self.width = screen_width
|
||||
self.height = screen_height
|
||||
self.monospace = tkinter.font.Font(self, family="Courier", weight="bold", size=self.fontsize) # type: ignore
|
||||
cw = self.monospace.measure("x")*self.width+8
|
||||
self.canvas = tkinter.Canvas(self, width=cw, height=self.fontsize*self.height+8, bg="blue")
|
||||
self.canvas.pack()
|
||||
self.bind("<KeyPress>", self.keypress)
|
||||
self.bind("<KeyRelease>", self.keyrelease)
|
||||
self.after(10, self.update_screen)
|
||||
|
||||
def keypress(self, e) -> None:
|
||||
key = e.char or e.keysym
|
||||
if len(key) == 1:
|
||||
self.vm.keyboard_scancode = self.vm.system.encodestr(key)[0]
|
||||
elif len(key) > 1:
|
||||
code = 0
|
||||
if key == "Up":
|
||||
code = ord("w")
|
||||
elif key == "Down":
|
||||
code = ord("s")
|
||||
elif key == "Left":
|
||||
code = ord("a")
|
||||
elif key == "Right":
|
||||
code = ord("d")
|
||||
self.vm.keyboard_scancode = code
|
||||
else:
|
||||
self.vm.keyboard_scancode = 0
|
||||
|
||||
def keyrelease(self, e) -> None:
|
||||
self.vm.keyboard_scancode = 0
|
||||
|
||||
def update_screen(self) -> None:
|
||||
self.canvas.delete(tkinter.ALL)
|
||||
lines = []
|
||||
for y in range(self.height):
|
||||
line = self.vm.system.decodestr(self.vm.memory.get_bytes(self.address+y*self.width, self.width))
|
||||
lines.append("".join(c if c.isprintable() else " " for c in line))
|
||||
for y, line in enumerate(lines):
|
||||
self.canvas.create_text(4, self.fontsize*y, text=line, fill="white", font=self.monospace, anchor=tkinter.NW)
|
||||
self.after(30, self.update_screen)
|
||||
|
||||
@classmethod
|
||||
def create(cls, vm: VM, screen_addr: int, screen_width: int, screen_height: int) -> None:
|
||||
viewer = cls(vm, screen_addr, screen_width, screen_height)
|
||||
viewer.mainloop()
|
||||
Reference in New Issue
Block a user