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# -*- coding: utf-8 -*-
#
# AWL simulator - AWL optimizer base class
#
# Copyright 2017 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
#from awlsim.common.cython_support cimport * #@cy
from awlsim.common.compat import *
from awlsim.common.enumeration import *
from awlsim.core.operatortypes import * #+cimport
__all__ = [
"AwlOptimizer_Base",
]
class AwlOptimizer_Base(object):
"""AWL/STL optimizer base class
"""
EnumGen.start
STAGE1 = EnumGen.item
STAGE2 = EnumGen.item
STAGE3 = EnumGen.item
EnumGen.end
# The optimization pass name.
NAME = "<none>"
LONGNAME = ""
# The optimization pass description string.
DESC = ""
# The stage(s) this optimization is supposed to run in.
STAGES = frozenset((STAGE1, ))
# Dependency lists.
BEFORE = frozenset()
AFTER = frozenset()
def __init__(self, optimizer):
self.optimizer = optimizer
def run(self, insns):
"""Run the optimizer on the supplied list of instructions.
Returns the optimized list of instructions.
Override this method.
"""
raise NotImplementedError
class __FindResult(object):
def __init__(self, jmpSourceInsns=None, jmpTargetInsns=None):
"""jmpSourceInsns: Set of found jump instructions.
jmpTargetInsns: Set of found jump target instructions.
"""
self.jmpSourceInsns = jmpSourceInsns or set()
self.jmpTargetInsns = jmpTargetInsns or set()
def _findInsnsByLabel(self, insns, labelStr):
"""Find instructions by label.
insns: The list of instructions to search.
labelStr: The label string to look for.
"""
res = self.__FindResult()
for insn in insns:
# Check if this instruction is the jump target.
if insn.labelStr == labelStr:
res.jmpTargetInsns.add(insn)
# Check if this instruction is the jump source.
if len(insn.ops) == 1 and\
insn.ops[0].operType == AwlOperatorTypes.LBL_REF and\
insn.ops[0].immediateStr == labelStr:
res.jmpSourceInsns.add(insn)
return res
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