src/mem/slicc/ast/DeferEnqueueingStatementAST.py

#
# Copyright (c) 2017 Advanced Micro Devices, Inc.
# All rights reserved.
#
# For use for simulation and test purposes only
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. 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.
#
# 3. Neither the name of the copyright holder 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 HOLDER 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.StatementAST import StatementAST
from slicc.symbols import Var

class DeferEnqueueingStatementAST(StatementAST):
    def __init__(self, slicc, queue_name, type_ast, statements):
        super(DeferEnqueueingStatementAST, self).__init__(slicc)

        self.queue_name = queue_name
        self.type_ast = type_ast
        self.statements = statements

    def __repr__(self):
        return "[DeferEnqueueingStatementAst: %s %s %s]" % \
               (self.queue_name, self.type_ast.ident, self.statements)

    def generate(self, code, return_type, **kwargs):
        code("{")
        code.indent()
        self.symtab.pushFrame()

        msg_type = self.type_ast.type

        # Add new local var to symbol table
        v = Var(self.symtab, "out_msg", self.location, msg_type, "*out_msg",
                self.pairs)
        self.symtab.newSymbol(v)

        # Declare message
        code("std::shared_ptr<${{msg_type.c_ident}}> out_msg = "\
             "std::make_shared<${{msg_type.c_ident}}>(clockEdge());")

        # The other statements
        t = self.statements.generate(code, None)
        self.queue_name.assertType("OutPort")

        code("(${{self.queue_name.var.code}}).deferEnqueueingMessage(addr, "\
             "out_msg);")

        # End scope
        self.symtab.popFrame()
        code.dedent()
        code("}")

    def findResources(self, resources):
        var = self.queue_name.var
        res_count = int(resources.get(var, 0))
        resources[var] = str(res_count + 1)