1 #!/usr/bin/env python 2 3 """ 4 RSVP instruction classes. 5 6 Copyright (C) 2007, 2008 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 from micropython.inspect import Const, Instance 23 24 class Instruction: 25 26 "A generic instruction." 27 28 def __init__(self, attr=None): 29 self.attr = attr 30 31 def __repr__(self): 32 if self.attr is not None: 33 return "%s(%r)" % (self.__class__.__name__, self.attr) 34 else: 35 return "%s()" % self.__class__.__name__ 36 37 # Instructions operating on the value stack. 38 39 class LoadConst(Instruction): "Load the constant from the specified location." 40 class Duplicate(Instruction): "Duplicate the top of stack." 41 class Pop(Instruction): "Pop the top of stack." 42 43 # Access within an invocation frame. 44 45 class LoadName(Instruction): "Load the object from the given local attribute/variable." 46 class StoreName(Instruction): "Store the object in the given local attribute/variable." 47 48 # Access to address-relative data. 49 50 class MakeObject(Instruction): "Make a new object." 51 # ... DropObject not defined: Assume garbage collection. 52 class LoadAttr(Instruction): "Load the object from the given attribute." 53 class LoadAttrIndex(Instruction): "Load the object for the attribute with the given index." 54 class StoreAttr(Instruction): "Store an object in the given attribute." 55 class StoreAttrIndex(Instruction): "Store an object in the attribute with the given index." 56 57 # Access to invocation frames in preparation. 58 59 class MakeFrame(Instruction): "Make a new invocation frame." 60 class ReserveFrame(Instruction): "Reserve the given number of entries for the invocation frame." 61 class DropFrame(Instruction): "Drop an invocation frame." 62 class StoreFrame(Instruction): "Store an argument at the given frame location." 63 class StoreFrameIndex(Instruction): "Store an argument for the parameter with the given index." 64 65 # Invocation-related instructions. 66 67 class Jump(Instruction): "Jump unconditionally." 68 class JumpIfFalse(Instruction): "Jump if the last evaluation gave a false result." 69 class JumpIfTrue(Instruction): "Jump if the last evaluation gave a true result." 70 class LoadCallable(Instruction): "Load the target of an invocation." 71 class LoadContext(Instruction): "Load the context of an invocation." 72 class CheckContext(Instruction): "Check the context of an invocation against the target." 73 class RaiseException(Instruction): "Raise an exception." 74 class Return(Instruction): "Return a value from a subprogram." 75 class CheckException(Instruction): "Check the raised exception against another." 76 77 # vim: tabstop=4 expandtab shiftwidth=4