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.code_formatter import code_formatter
29
30from slicc.ast.DeclAST import DeclAST
31from slicc.symbols import Func, Type
32
33class FuncDeclAST(DeclAST):
34 def __init__(self, slicc, return_type, ident, formals, pairs, statements):
35 super(FuncDeclAST, self).__init__(slicc, pairs)
36
37 self.return_type = return_type
38 self.ident = ident
39 self.formals = formals
40 self.statements = statements
41
42 def __repr__(self):
43 return "[FuncDecl: %s]" % self.ident
44
45 def files(self, parent=None):
46 if "external" in self or self.statements is None:
47 return set()
48
49 if parent:
50 ident = "%s_%s" % (parent, self.ident)
51 else:
52 ident = self.ident
53 return set(("%s.cc" % ident,))
54
55 def generate(self):
56 types = []
57 params = []
58 void_type = self.symtab.find("void", Type)
59
60 # Generate definition code
61 self.symtab.pushFrame()
62
63 # Lookup return type
64 return_type = self.return_type.type
65
66 # Generate function header
67 for formal in self.formals:
68 # Lookup parameter types
69 type, ident = formal.generate()
70 types.append(type)
71 params.append(ident)
72
73 body = code_formatter()
74 if self.statements is None:
75 self["external"] = "yes"
76 else:
77 rtype = self.statements.generate(body, return_type)
78
79 self.symtab.popFrame()
80
81 machine = self.state_machine
82 func = Func(self.symtab, self.ident, self.location, return_type,
83 types, params, str(body), self.pairs, machine)
84
85 if machine is not None:
86 machine.addFunc(func)
87 else:
88 self.symtab.newSymbol(func)