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# 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]}})) {
$error
}
#endif
''')
elif self.proc_name == "set_cache_entry":
code("set_cache_entry(m_cache_entry_ptr, %s);" %(cvec[0]));
elif self.proc_name == "unset_cache_entry":
code("unset_cache_entry(m_cache_entry_ptr);");
elif self.proc_name == "set_tbe":
code("set_tbe(m_tbe_ptr, %s);" %(cvec[0]));
elif self.proc_name == "unset_tbe":
code("unset_tbe(m_tbe_ptr);");
else:
# Normal function
if "external" not in func and not func.isInternalMachineFunc:
self.error("Invalid function")
params = ""
first_param = True
for (param_code, type) in zip(cvec, type_vec):
if first_param:
params = str(param_code)
first_param = False
else:
params += ', '
params += str(param_code);
fix = code.nofix()
code('(${{func.c_ident}}($params))')
code.fix(fix)
return func.return_type
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