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

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

// Copyright (c) 2007-2008 The Florida State University
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
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// 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
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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//
// Authors: Stephen Hines

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

// 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(MachInst machInst);
                %(BasicExecDeclare)s
        };
}};

// Basic instruction class constructor template.
def template BasicConstructor {{
        inline %(class_name)s::%(class_name)s(MachInst 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(%(CPU_exec_context)s *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);
}};

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

// The most basic instruction format...
def format BasicOp(code, *flags) {{
        iop = InstObjParams(name, Name, 'ArmStaticInst', code, flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};