FuncCallExprAST.py revision 10981
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 2# Copyright (c) 2009 The Hewlett-Packard Development Company 3# Copyright (c) 2013 Advanced Micro Devices, Inc. 4# All rights reserved. 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions are 8# met: redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer; 10# redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution; 13# neither the name of the copyright holders nor the names of its 14# contributors may be used to endorse or promote products derived from 15# this software without specific prior written permission. 16# 17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29from slicc.ast.ExprAST import ExprAST 30from slicc.symbols import Func, Type 31 32class FuncCallExprAST(ExprAST): 33 def __init__(self, slicc, proc_name, exprs): 34 super(FuncCallExprAST, self).__init__(slicc) 35 self.proc_name = proc_name 36 self.exprs = exprs 37 38 def __repr__(self): 39 return "[FuncCallExpr: %s %s]" % (self.proc_name, self.exprs) 40 41 def generate(self, code): 42 machine = self.state_machine 43 44 if self.proc_name == "DPRINTF": 45 # Code for inserting the location of the DPRINTF() 46 # statement in the .sm file in the statement it self. 47 # 'self.exprs[0].location' represents the location. 48 # 'format' represents the second argument of the 49 # original DPRINTF() call. It is left unmodified. 50 # str_list is used for concatenating the argument 51 # list following the format specifier. A DPRINTF() 52 # call may or may not contain any arguments following 53 # the format specifier. These two cases need to be 54 # handled differently. Hence the check whether or not 55 # the str_list is empty. 56 57 dflag = "%s" % (self.exprs[0].name) 58 machine.addDebugFlag(dflag) 59 format = "%s" % (self.exprs[1].inline()) 60 format_length = len(format) 61 str_list = [] 62 63 for i in range(2, len(self.exprs)): 64 str_list.append("%s" % self.exprs[i].inline()) 65 66 if len(str_list) == 0: 67 code('DPRINTF($0, "$1: $2")', 68 dflag, self.exprs[0].location, format[2:format_length-2]) 69 else: 70 code('DPRINTF($0, "$1: $2", $3)', 71 dflag, 72 self.exprs[0].location, format[2:format_length-2], 73 ', '.join(str_list)) 74 75 return self.symtab.find("void", Type) 76 77 # hack for adding comments to profileTransition 78 if self.proc_name == "APPEND_TRANSITION_COMMENT": 79 # FIXME - check for number of parameters 80 code("APPEND_TRANSITION_COMMENT($0)", self.exprs[0].inline()) 81 return self.symtab.find("void", Type) 82 83 # Look up the function in the symbol table 84 func = self.symtab.find(self.proc_name, Func) 85 86 # Check the types and get the code for the parameters 87 if func is None: 88 self.error("Unrecognized function name: '%s'", self.proc_name) 89 90 if len(self.exprs) != len(func.param_types): 91 self.error("Wrong number of arguments passed to function : '%s'" +\ 92 " Expected %d, got %d", self.proc_name, 93 len(func.param_types), len(self.exprs)) 94 95 cvec = [] 96 type_vec = [] 97 for expr,expected_type in zip(self.exprs, func.param_types): 98 # Check the types of the parameter 99 actual_type,param_code = expr.inline(True) 100 if str(actual_type) != 'OOD' and \ 101 str(actual_type) != str(expected_type): 102 expr.error("Type mismatch: expected: %s actual: %s" % \ 103 (expected_type, actual_type)) 104 cvec.append(param_code) 105 type_vec.append(expected_type) 106 107 # OK, the semantics of "trigger" here is that, ports in the 108 # machine have different priorities. We always check the first 109 # port for doable transitions. If nothing/stalled, we pick one 110 # from the next port. 111 # 112 # One thing we have to be careful as the SLICC protocol 113 # writter is : If a port have two or more transitions can be 114 # picked from in one cycle, they must be independent. 115 # Otherwise, if transition A and B mean to be executed in 116 # sequential, and A get stalled, transition B can be issued 117 # erroneously. In practice, in most case, there is only one 118 # transition should be executed in one cycle for a given 119 # port. So as most of current protocols. 120 121 if self.proc_name == "trigger": 122 code(''' 123{ 124''') 125 if machine.TBEType != None and machine.EntryType != None: 126 code(''' 127 TransitionResult result = doTransition(${{cvec[0]}}, ${{cvec[2]}}, ${{cvec[3]}}, ${{cvec[1]}}); 128''') 129 elif machine.TBEType != None: 130 code(''' 131 TransitionResult result = doTransition(${{cvec[0]}}, ${{cvec[2]}}, ${{cvec[1]}}); 132''') 133 elif machine.EntryType != None: 134 code(''' 135 TransitionResult result = doTransition(${{cvec[0]}}, ${{cvec[2]}}, ${{cvec[1]}}); 136''') 137 else: 138 code(''' 139 TransitionResult result = doTransition(${{cvec[0]}}, ${{cvec[1]}}); 140''') 141 142 code(''' 143 if (result == TransitionResult_Valid) { 144 counter++; 145 continue; // Check the first port again 146 } 147 148 if (result == TransitionResult_ResourceStall || 149 result == TransitionResult_ProtocolStall) { 150 scheduleEvent(Cycles(1)); 151 152 // Cannot do anything with this transition, go check next doable transition (mostly likely of next port) 153 } 154} 155''') 156 elif self.proc_name == "error": 157 code("$0", self.exprs[0].embedError(cvec[0])) 158 elif self.proc_name == "assert": 159 error = self.exprs[0].embedError('"assert failure"') 160 code(''' 161#ifndef NDEBUG 162if (!(${{cvec[0]}})) { 163 $error 164} 165#endif 166''') 167 168 elif self.proc_name == "set_cache_entry": 169 code("set_cache_entry(m_cache_entry_ptr, %s);" %(cvec[0])); 170 elif self.proc_name == "unset_cache_entry": 171 code("unset_cache_entry(m_cache_entry_ptr);"); 172 elif self.proc_name == "set_tbe": 173 code("set_tbe(m_tbe_ptr, %s);" %(cvec[0])); 174 elif self.proc_name == "unset_tbe": 175 code("unset_tbe(m_tbe_ptr);"); 176 elif self.proc_name == "stallPort": 177 code("scheduleEvent(Cycles(1));") 178 179 else: 180 # Normal function 181 if "external" not in func and not func.isInternalMachineFunc: 182 self.error("Invalid function") 183 184 params = "" 185 first_param = True 186 187 for (param_code, type) in zip(cvec, type_vec): 188 if first_param: 189 params = str(param_code) 190 first_param = False 191 else: 192 params += ', ' 193 params += str(param_code); 194 195 fix = code.nofix() 196 code('(${{func.c_ident}}($params))') 197 code.fix(fix) 198 199 return func.return_type 200