mirror of
https://github.com/osmarks/random-stuff
synced 2024-12-26 18:10:34 +00:00
411 lines
12 KiB
Python
411 lines
12 KiB
Python
import dataclasses
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import re
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import typing
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import operator
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import functools
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import enum
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import collections
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import typing
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MEM_SIZE = 256
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WAITING = object()
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class Direction(enum.Enum):
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UP = 0
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DOWN = 1
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RIGHT = 2
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LEFT = 3
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ANY = 8
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class RunState(enum.Enum):
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IDLE = 0
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RUNNING = 1
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BLOCKED = 2
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STOPPED = 3
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@dataclasses.dataclass
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class Node:
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# node memory
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# code is loaded in at the start of memory
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# the program counter is simply the last memory location
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memory: bytearray = dataclasses.field(default_factory=lambda: bytearray(MEM_SIZE))
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state: RunState = RunState.IDLE
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input_buffer: dict[Direction, int] = dataclasses.field(default_factory=dict)
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read_return_location: typing.Optional[int] = None
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#output_buffer: dict[Direction, int] = dataclasses.field(default_factory=dict)
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blocked_on: typing.Optional[Direction] = None
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def __getitem__(self, loc):
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return self.memory[loc]
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def __setitem__(self, loc, value):
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assert loc is not None
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if isinstance(value, list):
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for i, x in enumerate(value):
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self.memory[loc + i] = x % 256
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else:
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self.memory[loc] = value % 256
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def pad_list(l, n, default):
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return l + [default] * (n - len(l))
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def display_hex(x): return hex(x)[2:].zfill(2)
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def memdump(mem):
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out = []
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out.append(" \x1b[31;1m" + " ".join(map(display_hex, range(16))) + "\x1b[0m")
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for i in range(0, len(mem), 16):
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out.append("\x1b[32;1m" + display_hex(i) + "\x1b[0m " + " ".join(map(display_hex, mem[i:i+16])))
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return "\n".join(out)
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@dataclasses.dataclass
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class ExecutionContext:
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node: Node
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params: tuple[int]
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io: any
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@dataclasses.dataclass
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class Op:
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name: str
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function: typing.Callable[ExecutionContext, None]
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ip_advancement: int
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opcodes = {}
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def make_binop_wrapper(name, fn):
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@functools.wraps(fn)
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def wrapper(ctx):
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ctx.node[ctx.params[0]] = fn(ctx.node[ctx.params[1]], ctx.node[ctx.params[2]])
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return Op(name, wrapper, 4)
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def nop(node, *_): pass
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opcodes[0x00] = Op("NOP", nop, 1)
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def test_print(ctx):
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print(f"{ctx.node[-1]}: {display_hex(ctx.params[0])} = {display_hex(ctx.node[ctx.params[0]])}")
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opcodes[0x01] = Op("PRINT", test_print, 2)
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def mov(ctx): # MOV dest src
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ctx.node[ctx.params[0]] = ctx.node[ctx.params[1]]
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opcodes[0x02] = Op("MOV", mov, 3)
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opcodes[0x03] = make_binop_wrapper("ADD", operator.add) # ADD dest src1 src2
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def mnz(ctx): # "move if not zero"; MEZ cond dest src
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if ctx.node[ctx.params[0]] != 0: ctx.node[ctx.params[1]] = ctx.node[ctx.params[2]]
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opcodes[0x04] = Op("MNZ", mnz, 4)
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def inc(ctx): # INC dest
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ctx.node[ctx.params[0]] += 1
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opcodes[0x05] = Op("INC", inc, 2)
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opcodes[0x06] = make_binop_wrapper("MUL", operator.mul)
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opcodes[0x07] = make_binop_wrapper("MOD", operator.mod)
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opcodes[0x08] = make_binop_wrapper("DIV", operator.floordiv)
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opcodes[0x09] = make_binop_wrapper("SUB", operator.sub)
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opcodes[0x10] = make_binop_wrapper("OR", operator.or_)
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opcodes[0x11] = make_binop_wrapper("AND", operator.and_)
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opcodes[0x12] = make_binop_wrapper("SHR", operator.rshift)
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opcodes[0x13] = make_binop_wrapper("SHL", operator.lshift)
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def mez(ctx): # "move if equal to zero"; MEZ cond dest src
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if ctx.node[ctx.params[0]] == 0: ctx.node[ctx.params[1]] = ctx.node[ctx.params[2]]
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opcodes[0x14] = Op("MEZ", mez, 4)
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def idm(ctx): # "indirect destination move" - destination parameter is a memory location to fetch the destination from; IDM idest src
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ctx.node[ctx.node[ctx.params[0]]] = ctx.node[ctx.params[1]]
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opcodes[0x15] = Op("IDM", idm, 3)
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def ism(ctx): # "indirect source move"; ISM dest isrc
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ctx.node[ctx.params[0]] = ctx.node[ctx.node[ctx.params[1]]]
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opcodes[0x16] = Op("ISM", ism, 3)
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def imv(ctx): # "indirect move" - both destination and source are indirected; IMV idest isrc
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ctx.node[ctx.node[ctx.params[0]]] = ctx.node[ctx.node[ctx.params[1]]]
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opcodes[0x17] = Op("IMV", imv, 3)
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opcodes[0x18] = make_binop_wrapper("SADD", lambda a, b: min(a + b, 255))
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opcodes[0x19] = make_binop_wrapper("SSUB", lambda a, b: max(a - b, 0))
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def write(ctx):
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ctx.io["write"](ctx.params[0], ctx.node[ctx.params[1]])
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opcodes[0x20] = Op("WR", write, 3)
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def read(ctx):
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ctx.io["read"](ctx.params[0], ctx.params[1])
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opcodes[0x21] = Op("RE", read, 3)
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def dump(ctx):
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print(memdump(ctx.node.memory))
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opcodes[0xfe] = Op("DUMP", dump, 1)
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def halt(ctx):
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memdump(ctx.node.memory)
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ctx.node.state = RunState.STOPPED
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opcodes[0xff] = Op("HALT", halt, 1)
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def step_node(node, io):
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ip = node[-1]
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instr = node[ip:ip + 4].ljust(4, b"\x00")
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opcode, a, b, c = instr
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op = opcodes.get(opcode)
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if op:
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node[-1] += op.ip_advancement
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op.function(ExecutionContext(node, (a, b, c), io))
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else:
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print("unknown instr", " ".join(map(display_hex, instr)), "at", display_hex(ip))
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print(memdump(node.memory))
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node[-1] += 1
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node.state = RunState.STOPPED
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def flatten(xs):
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for x in xs:
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if isinstance(x, (list, map, filter)):
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for y in x:
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yield y
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else:
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yield x
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def assemble(code):
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instructions = {}
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for opcode, op in opcodes.items():
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instructions[op.name] = (opcode, op.ip_advancement)
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out = []
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# implicit "I" label for program counter for branching
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labels = { "I": MEM_SIZE - 1 }
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unresolved_labels = collections.defaultdict(set)
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backfill = collections.defaultdict(set)
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position = 0
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def resolve(param):
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# ! operator on params emulates this ISA having immediate parameters by
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if param[0] == "!":
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# add to list of values needing storage, and add current output position to list of places to update when it gets a location
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backfill[param[1:]].add(position)
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return
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if re.match(r"[A-Za-z][A-Za-z0-9_\-]*", param): # is label
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try:
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return labels[param]
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except KeyError: # resolve label location later
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unresolved_labels[param].add(position)
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return 0
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else:
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return int(param, 16) % 256
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def write(*things):
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for value in flatten(things):
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if isinstance(value, int):
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out.append(value)
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else:
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out.append(resolve(value))
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nonlocal position
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position = len(out)
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for line in filter(lambda x: x != "", map(str.strip, code.split("\n"))):
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tokens = line.split()
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for index, token in enumerate(tokens):
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if token.startswith("#"):
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tokens = tokens[:index]
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break
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if len(tokens) == 0: continue
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# label definition
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if tokens[0].endswith(":"):
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label = tokens.pop(0)[:-1]
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labels[label] = position
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for unresolved_loc in unresolved_labels[label]:
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out[unresolved_loc] = position
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del unresolved_labels[label]
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if len(tokens) > 0:
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ltype = tokens[0].upper()
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# raw output
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if ltype == "!": write(tokens[1:])
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# NOP padding
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elif ltype == "!PAD":
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write([0] * int(tokens[1], 16))
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# instruction mnemonic
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else:
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instr = instructions[ltype]
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if instr[1] != 0: # special instructions might move it variable amounts at some point
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assert len(tokens) == instr[1], f"{ltype} takes {instr[1] - 1} operands"
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write(instr[0], tokens[1:])
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while len(backfill) > 0:
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for value, locations in list(backfill.items()):
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newpos = position
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write(value)
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for location in locations:
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out[location] = newpos
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print(f"Backfilled {display_hex(newpos)}: {value}")
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del backfill[value]
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for k in unresolved_labels:
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print("Unresolved label:", k)
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if len(out) >= MEM_SIZE:
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print("Code space exceeded")
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return out
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n = Node()
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n.state = RunState.RUNNING
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n[0] = assemble("""
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LOOP:
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inc INCBUF
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add TEMP !-50 INCBUF
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# debug print
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#! 01 INCBUF
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#wr 0 INCBUF
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#re 0 INCBUF
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mnz TEMP I !LOOP
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halt
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INCBUF: ! 1
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TEMP: ! 0
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OUT: ! 44
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""")
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n2 = Node()
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n2.state = RunState.RUNNING
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n2[0] = assemble("""
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LOOP2:
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inc INCBUF
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add TEMP !-50 INCBUF
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mnz TEMP I !LOOP2
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LOOP:
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re 8 BEE
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#wr 1 BEE
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#! 01 BEE
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mov I !LOOP
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TEMP: ! 0
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BEE: ! 0
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INCBUF: ! 4
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""")
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n3 = Node()
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n3.state = RunState.RUNNING
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n3[0] = assemble("""
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mov M !0
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mov B !0
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LOOP:
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sub X M !40
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mez X I !DONE
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wr 0 M
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ism B M
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inc M
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wr 0 B
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mov I !LOOP
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DONE:
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wr 0 !0FF
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halt
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M: ! 0
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X: ! 87
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B: ! 0
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""")
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def offset(tup, idx, by):
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return tup[:idx] + (tup[idx] + by,) + tup[idx + 1:]
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opposite_directions = { Direction.UP: Direction.DOWN, Direction.DOWN: Direction.UP, Direction.LEFT: Direction.RIGHT, Direction.RIGHT: Direction.LEFT }
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def apply_direction(coords, dir):
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if dir == Direction.UP: return offset(coords, 1, 1)
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elif dir == Direction.DOWN: return offset(coords, 1, -1)
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elif dir == Direction.LEFT: return offset(coords, 0, -1)
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elif dir == Direction.RIGHT: return offset(coords, 0, 1)
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bootloader = """
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!PAD E0
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LOOP:
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re 8 RI # read target location from arbitrary side into buffer
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add RJ RI !1
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mez RJ I !0 # if target location is 255, jump to 0 (normal thing start)
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re 8 RJ # read data into other buffer
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idm RI RJ # transfer data into specified location
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mov I !LOOP # unconditional jump back to start
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RI: ! 0
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RJ: ! 0
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"""
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bootloader_machine_code = assemble(bootloader)
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def new_node():
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n = Node()
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print("starting node")
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n.state = RunState.RUNNING
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n[0] = bootloader_machine_code
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return n
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grid = collections.defaultdict(new_node)
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grid[0, 0] = n
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grid[0, 1] = n2
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grid[0, 2] = n3
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def write(node, orig, dir, val):
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#print("WR", orig, dir, hex(val))
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if dir in node.input_buffer:
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print("deadlock (write) by", orig, "in", dir, "target", grid[apply_direction(orig, dir)], node.input_buffer)
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node.state = RunState.BLOCKED
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return
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other = grid[apply_direction(orig, dir)]
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opp = opposite_directions[dir]
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# if the other node is waiting on communication from this node, dump data from here into memory
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# and unblock it
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if opp == other.blocked_on or other.blocked_on == Direction.ANY:
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other.blocked_on = None
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other.state = RunState.RUNNING
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other[other.read_return_location] = val
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# if it is not, then put data into its input buffer (it will unblock this node if it ever reads on this)
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else:
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other.input_buffer[opp] = val
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# switch state to blocked
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node.state = RunState.BLOCKED
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node.blocked_on = dir
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def read(node, orig, dir, ret):
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#print("RE", orig, dir)
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if dir == Direction.ANY and len(node.input_buffer) > 0:
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rdir, val = node.input_buffer.popitem()
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other = grid[apply_direction(orig, rdir)]
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opp = opposite_directions[rdir]
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if other.blocked_on == opp or other.blocked_on == Direction.ANY:
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other.blocked_on = None
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other.state = RunState.RUNNING
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node[ret] = val
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return
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# if input already buffered
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if dir in node.input_buffer:
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other = grid[apply_direction(orig, dir)]
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opp = opposite_directions[dir]
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# remove blocking state
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if other.blocked_on == opp or other.blocked_on == Direction.ANY:
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other.blocked_on = None
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other.state = RunState.RUNNING
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# put buffered data into memory at specified return address
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node[ret] = node.input_buffer[dir]
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del node.input_buffer[dir]
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else:
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# set to blocked, put return address in node data
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node.read_return_location = ret
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node.state = RunState.BLOCKED
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node.blocked_on = dir
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while True:
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ran_one = False
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for coords, node in list(grid.items()):
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#the reason being is that then you could play an awesome game of core-war on itprint(coords, node.state)
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if node.state == RunState.RUNNING:
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step_node(node, {
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"write": lambda dir, val: write(node, coords, Direction(dir), val),
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"read": lambda dir, ret: read(node, coords, Direction(dir), ret)
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})
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ran_one = True
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if not ran_one: break
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