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
310972Sdavid.hashe@amd.com# Copyright (c) 2013 Advanced Micro Devices, Inc.
46657Snate@binkert.org# All rights reserved.
56657Snate@binkert.org#
66657Snate@binkert.org# Redistribution and use in source and binary forms, with or without
76657Snate@binkert.org# modification, are permitted provided that the following conditions are
86657Snate@binkert.org# met: redistributions of source code must retain the above copyright
96657Snate@binkert.org# notice, this list of conditions and the following disclaimer;
106657Snate@binkert.org# redistributions in binary form must reproduce the above copyright
116657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the
126657Snate@binkert.org# documentation and/or other materials provided with the distribution;
136657Snate@binkert.org# neither the name of the copyright holders nor the names of its
146657Snate@binkert.org# contributors may be used to endorse or promote products derived from
156657Snate@binkert.org# this software without specific prior written permission.
166657Snate@binkert.org#
176657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
186657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
196657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
206657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
216657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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246657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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276657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
286657Snate@binkert.org
296657Snate@binkert.orgfrom slicc.ast.ExprAST import ExprAST
306657Snate@binkert.orgfrom slicc.symbols import Type, Var
316657Snate@binkert.org
326657Snate@binkert.orgclass VarExprAST(ExprAST):
336657Snate@binkert.org    def __init__(self, slicc, var):
346657Snate@binkert.org        super(VarExprAST, self).__init__(slicc)
356657Snate@binkert.org        self._var = var
366657Snate@binkert.org
376657Snate@binkert.org    def __repr__(self):
386657Snate@binkert.org        return "[VarExprAST: %r]" % self._var
396657Snate@binkert.org
406657Snate@binkert.org    @property
416657Snate@binkert.org    def name(self):
426657Snate@binkert.org        return str(self._var)
436657Snate@binkert.org
446657Snate@binkert.org    @property
456657Snate@binkert.org    def var(self):
466657Snate@binkert.org        var = self.symtab.find(self._var, Var)
476657Snate@binkert.org        if not var:
486657Snate@binkert.org            self.error("Unrecognized variable: %s", self._var)
496657Snate@binkert.org        return var
506657Snate@binkert.org
516657Snate@binkert.org    def assertType(self, type_ident):
526657Snate@binkert.org        expected_type = self.symtab.find(type_ident, Type)
536657Snate@binkert.org
546657Snate@binkert.org        if not expected_type:
556657Snate@binkert.org            self.error("There must be a type '%s' declared in this scope",
566657Snate@binkert.org                       type_ident)
576657Snate@binkert.org
586657Snate@binkert.org        if self.var.type != expected_type:
596657Snate@binkert.org            self.error("Incorrect type: " + \
606657Snate@binkert.org                       "'%s' is expected to be type '%s' not '%s'",
616657Snate@binkert.org                       self.var.ident, expected_type, self.var.type)
626657Snate@binkert.org
636657Snate@binkert.org    def generate(self, code):
646657Snate@binkert.org        fix = code.nofix()
656657Snate@binkert.org        code("${{self.var.code}}")
666657Snate@binkert.org        code.fix(fix)
676657Snate@binkert.org        return self.var.type
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