AssignStatementAST.py revision 6657
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 2# Copyright (c) 2009 The Hewlett-Packard Development Company 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer; 9# redistributions in binary form must reproduce the above copyright 10# notice, this list of conditions and the following disclaimer in the 11# documentation and/or other materials provided with the distribution; 12# neither the name of the copyright holders nor the names of its 13# contributors may be used to endorse or promote products derived from 14# this software without specific prior written permission. 15# 16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28from m5.util import code_formatter 29 30from slicc.ast.StatementAST import StatementAST 31 32class AssignStatementAST(StatementAST): 33 def __init__(self, slicc, lvalue, rvalue): 34 super(AssignStatementAST, self).__init__(slicc) 35 self.lvalue = lvalue 36 self.rvalue = rvalue 37 38 def __repr__(self): 39 return "[AssignStatementAST: %r := %r]" % (self.lvalue, self.rvalue) 40 41 def generate(self, code, return_type): 42 lcode = code_formatter() 43 rcode = code_formatter() 44 45 ltype = self.lvalue.generate(lcode) 46 rtype = self.rvalue.generate(rcode) 47 48 code("$lcode = $rcode;") 49 50 if ltype != rtype: 51 # FIXME - beckmann 52 # the following if statement is a hack to allow NetDest 53 # objects to be assigned to Sets this allows for the 54 # previous NetworkMessage Destiantion 'Set class' to 55 # migrate to the new NetworkMessage Destiantion 'NetDest 56 # class' 57 if str(ltype) != "NetDest" and str(rtype) != "Set": 58 self.error("Assignment type mismatch '%s' and '%s'", 59 ltype, rtype) 60