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.common import Label 23 from micropython.data import Attr, Class, Const, Function 24 25 def raw(code, objtable, paramtable): 26 new_code = [] 27 for item in code: 28 if isinstance(item, Attr): 29 new_code.append(( 30 item.context and item.context.location, 31 item.value and item.value.location # no useful context is provided 32 )) 33 elif isinstance(item, Class): 34 # NOTE: Need initialiser details! 35 new_code.append(( 36 objtable.as_list().get_code(item.full_name()), 37 objtable.get_index(item.full_name()), 38 item.get_instantiator().code_location, 39 len(item.get_instantiator().positional_names) 40 )) 41 elif isinstance(item, Const): 42 # NOTE: Need class details! 43 new_code.append(( 44 None, #objtable.as_list().get_code(item.full_name()), 45 None, #objtable.get_index(item.full_name()), 46 None, None 47 )) 48 elif isinstance(item, Function): 49 # NOTE: Need class and parameter details! Should arguably be types.FunctionType. 50 new_code.append(( 51 objtable.as_list().get_code("__builtins__.function"), 52 objtable.get_index("__builtins__.function"), 53 item.code_location, 54 len(item.positional_names) 55 )) 56 else: 57 new_code.append(item) 58 return new_code 59 60 def name(attr): 61 if isinstance(attr, Attr): 62 return attr.name or "<unnamed>" 63 else: 64 return attr or "<unnamed>" 65 66 class Instruction: 67 68 "A generic instruction." 69 70 def __init__(self, attr=None): 71 self.attr = attr 72 self.input = None 73 self.source = None # for storage instructions 74 75 def copy(self): 76 return self.__class__(self.attr) 77 78 def __repr__(self): 79 if self.attr is not None: 80 return "%s(%r)%s" % (self.__class__.__name__, self.attr, self.show_input()) 81 else: 82 return "%s()%s" % (self.__class__.__name__, self.show_input()) 83 84 def show_input(self): 85 if self.input is not None: 86 if self.source is not None: 87 return " <- (%r, %r)" % (self.input, self.source) 88 else: 89 return " <- %r" % self.input 90 elif self.source is not None: 91 return " <-- %r" % self.source 92 else: 93 return "" 94 95 def get_operand(self): 96 return None 97 98 class FrameRelativeInstruction(Instruction): 99 100 "An instruction operating on the current frame." 101 102 def __repr__(self): 103 return "%s(%r)%s" % (self.__class__.__name__, self.get_operand(), self.show_input()) 104 105 def get_operand(self): 106 return self.attr.position 107 108 FR = FrameRelativeInstruction 109 110 class AddressRelativeInstruction(Instruction): 111 112 "An instruction accessing an object's attribute." 113 114 def __repr__(self): 115 position = self.get_operand() 116 if position is not None: 117 return "%s(%r)%s # %s" % (self.__class__.__name__, position, self.show_input(), name(self.attr)) 118 else: 119 return "%s(%r)%s" % (self.__class__.__name__, name(self.attr), self.show_input()) 120 121 def get_operand(self): 122 return self.attr.position 123 124 AR = AddressRelativeInstruction 125 126 class AddressInstruction(Instruction): 127 128 "An instruction loading an address directly." 129 130 def __repr__(self): 131 location, position, result = self.get_operands() 132 if location is not None: 133 return "%s(%r)%s # %r, %r (%s)" % ( 134 self.__class__.__name__, result, self.show_input(), location, position, name(self.attr)) 135 elif result is not None: 136 return "%s(%r)%s # %s" % ( 137 self.__class__.__name__, result, self.show_input(), name(self.attr)) 138 else: 139 return "%s(...)%s # %s" % ( 140 self.__class__.__name__, self.show_input(), name(self.attr)) 141 142 def get_operands(self): 143 if isinstance(self.attr, Attr): 144 position = self.attr.position 145 location = self.attr.parent.location 146 147 # NOTE: Unpositioned attributes are handled here. 148 149 if location is not None and position is not None: 150 result = location + position + 1 151 else: 152 location = self.attr.parent.name 153 position = self.attr.name 154 result = None 155 return location, position, result 156 elif isinstance(self.attr, Label): 157 return None, None, self.attr.location 158 else: 159 return None, None, self.attr.location 160 161 def get_operand(self): 162 return self.get_operands()[-1] 163 164 Address = AddressInstruction 165 166 class ImmediateInstruction(Instruction): 167 168 "An instruction employing a constant." 169 170 def __repr__(self): 171 return "%s(%r)%s" % (self.__class__.__name__, self.attr, self.show_input()) 172 173 def get_operand(self): 174 return self.attr 175 176 Immediate = ImmediateInstruction 177 178 # Access to stored constant data. 179 180 class LoadConst(Address): "Load the constant, class, function, module from the specified location." 181 182 # Access within an invocation frame. 183 184 class LoadName(FR): "Load the current value from the given local attribute/variable." 185 class StoreName(FR): "Store the source value into the given local attribute/variable." 186 class LoadTemp(Immediate): "Load the current value from the given temporary location." 187 class StoreTemp(Immediate): "Store the current value into the given temporary location." 188 189 # Access to static data. 190 191 class LoadAddress(Address): "Load the current value from the given fixed attribute address." 192 class StoreAddress(Address): "Store the source value into the given fixed attribute address." 193 class LoadAddressContext(Address): "Load the current value from the given fixed attribute address, making the current value the context." 194 class MakeObject(Immediate): "Make a new object. There isn't a complementary DropObject." 195 196 # Access to address-relative data. 197 198 class LoadAttr(AR): "Load into the current value the given attribute of the object referenced by the current value." 199 class StoreAttr(AR): "Store the source value into the given attribute of the object referenced by the current value." 200 class LoadAttrIndex(Immediate): "Load into the current value the attribute of the current value with the given index." 201 class StoreAttrIndex(Immediate): "Store an object in the attribute with the given index." 202 203 # Access to invocation frames in preparation. 204 205 class MakeFrame(Immediate): "Make a new invocation frame." 206 class DropFrame(Instruction): "Drop an invocation frame." 207 class RecoverFrame(Instruction): "Recover the current frame as an invocation frame." 208 class StoreFrame(Immediate): "Store the current value as an argument for the parameter with the given position." 209 class StoreFrameIndex(Immediate): "Store the current value as an argument for the parameter with the given index." 210 class LoadCallable(Instruction): "Load the target of an invocation." 211 class StoreCallable(Instruction): "Store the source value into the object referenced by the current value." 212 class LoadContext(Instruction): "Load the context of an invocation." 213 class CheckFrame(Immediate): "Check the invocation frame and context for the target." 214 class CheckSelf(Instruction): "Check the first argument of an invocation against the target." 215 216 # Invocation-related instructions, using a special result "register". 217 218 class JumpWithFrame(Instruction): "Jump, adopting the invocation frame, to the current callable." 219 class ExtendFrame(Immediate): "Extend the current frame for temporary storage use." 220 class AdjustFrame(Immediate): "Adjust the current frame for corrected invocations." 221 class Return(Instruction): "Return from a subprogram." 222 class LoadResult(Instruction): "Load into the current value a returned value." 223 class StoreResult(Instruction): "Store the current value as a value to be returned." 224 225 # Branch-related instructions. 226 227 class Jump(Address): "Jump unconditionally." 228 class JumpIfFalse(Address): "Jump if the last evaluation gave a false result." 229 class JumpIfTrue(Address): "Jump if the last evaluation gave a true result." 230 231 # Exception-related instructions, using a special exception "register". 232 233 class LoadException(Instruction): "Load the raised exception." 234 class StoreException(Instruction): "Store the current object in the exception register." 235 class RaiseException(Instruction): "Raise an exception, jumping to the active handler." 236 class PushHandler(Address): "Push an exception handler onto the handler stack." 237 class PopHandler(Instruction): "Pop an exception handler from the handler stack." 238 class CheckException(Instruction): "Check the raised exception against another." 239 240 # Test instructions, operating on the boolean status register. 241 242 class TestIdentity(Instruction): "Test whether the current value is identical to the source value, setting the boolean status." 243 class TestIdentityAddress(Address): "Test whether the current value is identical to the given address, setting the boolean status." 244 class InvertBoolean(Instruction): "Invert the boolean status." 245 246 # vim: tabstop=4 expandtab shiftwidth=4