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

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

// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
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// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
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// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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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 = \
                    X86ISA::NoopMachInst;
                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

        def microFlagsText(self, flags):
            wrapped = ("(1ULL << StaticInst::%s)" % flag for flag in flags)
            return " | ".join(wrapped)

        def getGeneratorDef(self, micropc):
            return self.generatorTemplate % \
                (self.className, micropc, \
                 self.getAllocator(["IsMicroop", "IsDelayedCommit"]))

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