basic.isa revision 2935:d1223a6c9156 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2006 The Regents of The University of Michigan
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
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10// redistributions in binary form must reproduce the above copyright
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15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28//
29// Authors: Steve Reinhardt
30//          Korey Sewell
31
32// Declarations for execute() methods.
33def template BasicExecDeclare {{
34        Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const;
35}};
36
37// Basic instruction class declaration template.
38def template BasicDeclare {{
39        /**
40         * Static instruction class for "%(mnemonic)s".
41         */
42        class %(class_name)s : public %(base_class)s
43        {
44          public:
45                /// Constructor.
46                %(class_name)s(MachInst machInst);
47                %(BasicExecDeclare)s
48        };
49}};
50
51// Basic instruction class constructor template.
52def template BasicConstructor {{
53        inline %(class_name)s::%(class_name)s(MachInst machInst)  : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s)
54        {
55                %(constructor)s;
56        }
57}};
58
59
60// Basic instruction class execute method template.
61def template BasicExecute {{
62        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
63        {
64                Fault fault = NoFault;
65
66                %(fp_enable_check)s;
67                %(op_decl)s;
68                %(op_rd)s;
69                %(code)s;
70
71                if(fault == NoFault)
72                {
73                    %(op_wb)s;
74                }
75                return fault;
76        }
77}};
78
79// Basic decode template.
80def template BasicDecode {{
81        return new %(class_name)s(machInst);
82}};
83
84// Basic decode template, passing mnemonic in as string arg to constructor.
85def template BasicDecodeWithMnemonic {{
86        return new %(class_name)s("%(mnemonic)s", machInst);
87}};
88
89// The most basic instruction format...
90def format BasicOp(code, *flags) {{
91        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
92        header_output = BasicDeclare.subst(iop)
93        decoder_output = BasicConstructor.subst(iop)
94        decode_block = BasicDecode.subst(iop)
95        exec_output = BasicExecute.subst(iop)
96}};
97