xref: /gem5/src/arch/x86/isa/microops/base.isa

// -*- mode:c++ -*-

// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// 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,
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// Authors: Gabe Black

let {{
    # This will be populated with mappings between microop mnemonics and
    # the classes that represent them.
    microopClasses = {}
}};

//////////////////////////////////////////////////////////////////////////
//
// Base class for the python representation of x86 microops
//
//////////////////////////////////////////////////////////////////////////

let {{
    class X86Microop(object):
 
        generatorNameTemplate = "generate_%s_%d"

        generatorTemplate = '''
            StaticInstPtr
            ''' + generatorNameTemplate + '''(StaticInstPtr curMacroop)
            {
                static const char *macrocodeBlock = romMnemonic;
                static const ExtMachInst dummyExtMachInst;
                static const EmulEnv dummyEmulEnv(0, 0, 1, 1, 1);

                Macroop * macroop = dynamic_cast<Macroop *>(curMacroop.get());
                const ExtMachInst &machInst =
                    macroop ? macroop->getExtMachInst() : dummyExtMachInst;
                const EmulEnv &env =
                    macroop ? macroop->getEmulEnv() : dummyEmulEnv;
                // env may not be used in the microop's constructor.
                InstRegIndex reg(env.reg);
                reg = reg;
                using namespace RomLabels;
                return %s;
            }
        '''

        def __init__(self, name):
            self.name = name

        # This converts a python bool into a C++ bool
        def cppBool(self, val):
            if val:
                return "true"
            else:
                return "false"

        # This converts a list of python bools into
        # a comma seperated list of C++ bools.
        def microFlagsText(self, vals):
            text = ""
            for val in vals:
                text += ", %s" % self.cppBool(val)
            return text

        def getAllocator(self, mnemonic, *microFlags):
            return 'new %s(machInst, %s)' % \
                (self.className, mnemonic, self.microFlagsText(microFlags))

        def getGeneratorDef(self, micropc):
            return self.generatorTemplate % \
                (self.className, micropc, \
                 self.getAllocator(True, True, False, False))

        def getGenerator(self, micropc):
            return self.generatorNameTemplate % (self.className, micropc)
}};