PeekStatementAST.py revision 10963
16657Snate@binkert.org# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 26657Snate@binkert.org# Copyright (c) 2009 The Hewlett-Packard Development Company 36657Snate@binkert.org# All rights reserved. 46657Snate@binkert.org# 56657Snate@binkert.org# Redistribution and use in source and binary forms, with or without 66657Snate@binkert.org# modification, are permitted provided that the following conditions are 76657Snate@binkert.org# met: redistributions of source code must retain the above copyright 86657Snate@binkert.org# notice, this list of conditions and the following disclaimer; 96657Snate@binkert.org# redistributions in binary form must reproduce the above copyright 106657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the 116657Snate@binkert.org# documentation and/or other materials provided with the distribution; 126657Snate@binkert.org# neither the name of the copyright holders nor the names of its 136657Snate@binkert.org# contributors may be used to endorse or promote products derived from 146657Snate@binkert.org# this software without specific prior written permission. 156657Snate@binkert.org# 166657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216657Snate@binkert.org# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226657Snate@binkert.org# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246657Snate@binkert.org# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256657Snate@binkert.org# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276657Snate@binkert.org 286657Snate@binkert.orgfrom slicc.ast.StatementAST import StatementAST 296657Snate@binkert.orgfrom slicc.symbols import Var 306657Snate@binkert.org 316657Snate@binkert.orgclass PeekStatementAST(StatementAST): 326863Sdrh5@cs.wisc.edu def __init__(self, slicc, queue_name, type_ast, pairs, statements, method): 336863Sdrh5@cs.wisc.edu super(PeekStatementAST, self).__init__(slicc, pairs) 346657Snate@binkert.org 356657Snate@binkert.org self.queue_name = queue_name 366657Snate@binkert.org self.type_ast = type_ast 376657Snate@binkert.org self.statements = statements 386657Snate@binkert.org self.method = method 396657Snate@binkert.org 406657Snate@binkert.org def __repr__(self): 416657Snate@binkert.org return "[PeekStatementAST: %r queue_name: %r type: %r %r]" % \ 426657Snate@binkert.org (self.method, self.queue_name, self.type_ast, self.statements) 436657Snate@binkert.org 446657Snate@binkert.org def generate(self, code, return_type): 456657Snate@binkert.org self.symtab.pushFrame() 466657Snate@binkert.org 476657Snate@binkert.org msg_type = self.type_ast.type 486657Snate@binkert.org 496657Snate@binkert.org # Add new local var to symbol table 506657Snate@binkert.org var = Var(self.symtab, "in_msg", self.location, msg_type, "(*in_msg_ptr)", 516657Snate@binkert.org self.pairs) 526657Snate@binkert.org self.symtab.newSymbol(var) 536657Snate@binkert.org 546657Snate@binkert.org # Check the queue type 556657Snate@binkert.org self.queue_name.assertType("InPort") 566657Snate@binkert.org 576657Snate@binkert.org # Declare the new "in_msg_ptr" variable 586657Snate@binkert.org mtid = msg_type.ident 596657Snate@binkert.org qcode = self.queue_name.var.code 606657Snate@binkert.org code(''' 616657Snate@binkert.org{ 627007Snate@binkert.org // Declare message 638641Snate@binkert.org const $mtid* in_msg_ptr M5_VAR_USED; 646657Snate@binkert.org in_msg_ptr = dynamic_cast<const $mtid *>(($qcode).${{self.method}}()); 6510963Sdavid.hashe@amd.com if (in_msg_ptr == NULL) { 6610963Sdavid.hashe@amd.com // If the cast fails, this is the wrong inport (wrong message type). 6710963Sdavid.hashe@amd.com // Throw an exception, and the caller will decide to either try a 6810963Sdavid.hashe@amd.com // different inport or punt. 6910963Sdavid.hashe@amd.com throw RejectException(); 7010963Sdavid.hashe@amd.com } 716657Snate@binkert.org''') 727007Snate@binkert.org 736863Sdrh5@cs.wisc.edu if self.pairs.has_key("block_on"): 746863Sdrh5@cs.wisc.edu address_field = self.pairs['block_on'] 756863Sdrh5@cs.wisc.edu code(''' 7610231Ssteve.reinhardt@amd.com if (m_is_blocking && 7710231Ssteve.reinhardt@amd.com (m_block_map.count(in_msg_ptr->m_$address_field) == 1) && 7810231Ssteve.reinhardt@amd.com (m_block_map[in_msg_ptr->m_$address_field] != &$qcode)) { 796863Sdrh5@cs.wisc.edu $qcode.delayHead(); 806863Sdrh5@cs.wisc.edu continue; 816863Sdrh5@cs.wisc.edu } 826863Sdrh5@cs.wisc.edu ''') 836657Snate@binkert.org 847567SBrad.Beckmann@amd.com if self.pairs.has_key("wake_up"): 857567SBrad.Beckmann@amd.com address_field = self.pairs['wake_up'] 867567SBrad.Beckmann@amd.com code(''' 877567SBrad.Beckmann@amd.com if (m_waiting_buffers.count(in_msg_ptr->m_$address_field) > 0) { 887567SBrad.Beckmann@amd.com wakeUpBuffers(in_msg_ptr->m_$address_field); 897567SBrad.Beckmann@amd.com } 907567SBrad.Beckmann@amd.com ''') 917567SBrad.Beckmann@amd.com 926657Snate@binkert.org # The other statements 936657Snate@binkert.org self.statements.generate(code, return_type) 946657Snate@binkert.org self.symtab.popFrame() 956657Snate@binkert.org code("}") 966657Snate@binkert.org 976657Snate@binkert.org def findResources(self, resources): 986657Snate@binkert.org self.statements.findResources(resources) 99