xref: /gem5/src/arch/x86/isa/formats/basic.isa

// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
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// 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
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// modified or unmodified, in source code or in binary form.
//
// Copyright (c) 2007 The Regents of The University of Michigan
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
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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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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// Authors: Gabe Black

// Declarations for execute() methods.
def template BasicExecDeclare {{
        Fault execute(ExecContext *, Trace::InstRecord *) const;
}};

// Definitions of execute methods that panic.
def template BasicExecPanic {{
        Fault execute(ExecContext *, Trace::InstRecord *) const
        {
            panic("Execute method called when it shouldn't!");
            M5_DUMMY_RETURN
        }
}};

// Basic instruction class declaration template.
def template BasicDeclare {{
        /**
         * Static instruction class for "%(mnemonic)s".
         */
        class %(class_name)s : public %(base_class)s
        {
          public:
            // Constructor.
            %(class_name)s(ExtMachInst machInst);
            %(BasicExecDeclare)s
        };
}};

// Basic instruction class constructor template.
def template BasicConstructor {{
        %(class_name)s::%(class_name)s(ExtMachInst machInst)
            : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s)
        {
                %(constructor)s;
        }
}};

// Basic instruction class execute method template.
def template BasicExecute {{
        Fault %(class_name)s::execute(ExecContext *xc,
                Trace::InstRecord *traceData) const
        {
            Fault fault = NoFault;

            %(fp_enable_check)s;
            %(op_decl)s;
            %(op_rd)s;
            %(code)s;

            if(fault == NoFault)
            {
                %(op_wb)s;
            }
            return fault;
        }
}};

// Basic decode template.
def template BasicDecode {{
        return new %(class_name)s(machInst);
}};

// Basic decode template, passing mnemonic in as string arg to constructor.
def template BasicDecodeWithMnemonic {{
    return new %(class_name)s("%(mnemonic)s", machInst);
}};

def format BasicOperate(code, *flags) {{
        iop = InstObjParams(name, Name, 'X86ISA::X86StaticInst', code, flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};