| # Copyright (c) 1999-2008 Mark D. Hill and David A. Wood |
| # Copyright (c) 2009 The Hewlett-Packard Development Company |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer; |
| # redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution; |
| # neither the name of the copyright holders nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| from slicc.ast.ExprAST import ExprAST |
| from slicc.symbols import Func, Type |
| |
| class FuncCallExprAST(ExprAST): |
| def __init__(self, slicc, proc_name, exprs): |
| super(FuncCallExprAST, self).__init__(slicc) |
| self.proc_name = proc_name |
| self.exprs = exprs |
| |
| def __repr__(self): |
| return "[FuncCallExpr: %s %s]" % (self.proc_name, self.exprs) |
| |
| def generate(self, code): |
| machine = self.state_machine |
| |
| if self.proc_name == "DPRINTF": |
| # Code for inserting the location of the DPRINTF() |
| # statement in the .sm file in the statement it self. |
| # 'self.exprs[0].location' represents the location. |
| # 'format' represents the second argument of the |
| # original DPRINTF() call. It is left unmodified. |
| # str_list is used for concatenating the argument |
| # list following the format specifier. A DPRINTF() |
| # call may or may not contain any arguments following |
| # the format specifier. These two cases need to be |
| # handled differently. Hence the check whether or not |
| # the str_list is empty. |
| |
| format = "%s" % (self.exprs[1].inline()) |
| format_length = len(format) |
| str_list = [] |
| |
| for i in range(2, len(self.exprs)): |
| str_list.append("%s" % self.exprs[i].inline()) |
| |
| if len(str_list) == 0: |
| code('DPRINTF(RubySlicc, "$0: $1")', |
| self.exprs[0].location, format[2:format_length-2]) |
| else: |
| code('DPRINTF(RubySlicc, "$0: $1", $2)', |
| self.exprs[0].location, format[2:format_length-2], |
| ', '.join(str_list)) |
| |
| return self.symtab.find("void", Type) |
| |
| # hack for adding comments to profileTransition |
| if self.proc_name == "APPEND_TRANSITION_COMMENT": |
| # FIXME - check for number of parameters |
| code("APPEND_TRANSITION_COMMENT($0)", self.exprs[0].inline()) |
| return self.symtab.find("void", Type) |
| |
| # Look up the function in the symbol table |
| func = self.symtab.find(self.proc_name, Func) |
| |
| # Check the types and get the code for the parameters |
| if func is None: |
| self.error("Unrecognized function name: '%s'", self.proc_name) |
| |
| if len(self.exprs) != len(func.param_types): |
| self.error("Wrong number of arguments passed to function : '%s'" +\ |
| " Expected %d, got %d", self.proc_name, |
| len(func.param_types), len(self.exprs)) |
| |
| cvec = [] |
| type_vec = [] |
| for expr,expected_type in zip(self.exprs, func.param_types): |
| # Check the types of the parameter |
| actual_type,param_code = expr.inline(True) |
| if str(actual_type) != str(expected_type): |
| expr.error("Type mismatch: expected: %s actual: %s" % \ |
| (expected_type, actual_type)) |
| cvec.append(param_code) |
| type_vec.append(expected_type) |
| |
| # OK, the semantics of "trigger" here is that, ports in the |
| # machine have different priorities. We always check the first |
| # port for doable transitions. If nothing/stalled, we pick one |
| # from the next port. |
| # |
| # One thing we have to be careful as the SLICC protocol |
| # writter is : If a port have two or more transitions can be |
| # picked from in one cycle, they must be independent. |
| # Otherwise, if transition A and B mean to be executed in |
| # sequential, and A get stalled, transition B can be issued |
| # erroneously. In practice, in most case, there is only one |
| # transition should be executed in one cycle for a given |
| # port. So as most of current protocols. |
| |
| if self.proc_name == "trigger": |
| code(''' |
| { |
| Address addr = ${{cvec[1]}}; |
| ''') |
| if machine.TBEType != None and machine.EntryType != None: |
| code(''' |
| TransitionResult result = doTransition(${{cvec[0]}}, ${{cvec[2]}}, ${{cvec[3]}}, addr); |
| ''') |
| elif machine.TBEType != None: |
| code(''' |
| TransitionResult result = doTransition(${{cvec[0]}}, ${{cvec[2]}}, addr); |
| ''') |
| elif machine.EntryType != None: |
| code(''' |
| TransitionResult result = doTransition(${{cvec[0]}}, ${{cvec[2]}}, addr); |
| ''') |
| else: |
| code(''' |
| TransitionResult result = doTransition(${{cvec[0]}}, addr); |
| ''') |
| |
| code(''' |
| if (result == TransitionResult_Valid) { |
| counter++; |
| continue; // Check the first port again |
| } |
| |
| if (result == TransitionResult_ResourceStall) { |
| scheduleEvent(Cycles(1)); |
| |
| // Cannot do anything with this transition, go check next doable transition (mostly likely of next port) |
| } |
| } |
| ''') |
| elif self.proc_name == "error": |
| code("$0", self.exprs[0].embedError(cvec[0])) |
| elif self.proc_name == "assert": |
| error = self.exprs[0].embedError('"assert failure"') |
| code(''' |
| #ifndef NDEBUG |
| if (!(${{cvec[0]}})) { |
| $error |
| } |
| #endif |
| ''') |
| |
| elif self.proc_name == "continueProcessing": |
| code("counter++;") |
| code("continue; // Check the first port again") |
| |
| elif self.proc_name == "set_cache_entry": |
| code("set_cache_entry(m_cache_entry_ptr, %s);" %(cvec[0])); |
| elif self.proc_name == "unset_cache_entry": |
| code("unset_cache_entry(m_cache_entry_ptr);"); |
| elif self.proc_name == "set_tbe": |
| code("set_tbe(m_tbe_ptr, %s);" %(cvec[0])); |
| elif self.proc_name == "unset_tbe": |
| code("unset_tbe(m_tbe_ptr);"); |
| |
| else: |
| # Normal function |
| if "external" not in func and not func.isInternalMachineFunc: |
| self.error("Invalid function") |
| |
| params = "" |
| first_param = True |
| |
| for (param_code, type) in zip(cvec, type_vec): |
| if first_param: |
| params = str(param_code) |
| first_param = False |
| else: |
| params += ', ' |
| params += str(param_code); |
| |
| fix = code.nofix() |
| code('(${{func.c_ident}}($params))') |
| code.fix(fix) |
| |
| return func.return_type |
