basic.isa revision 12236:126ac9da6050 
1// -*- mode:c++ -*-
2
3// -*- mode:c++ -*-
4
5// Copyright (c) 2003-2005 The Regents of The University of Michigan
6// All rights reserved.
7//
8// Redistribution and use in source and binary forms, with or without
9// modification, are permitted provided that the following conditions are
10// met: redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer;
12// redistributions in binary form must reproduce the above copyright
13// notice, this list of conditions and the following disclaimer in the
14// documentation and/or other materials provided with the distribution;
15// neither the name of the copyright holders nor the names of its
16// contributors may be used to endorse or promote products derived from
17// this software without specific prior written permission.
18//
19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30//
31// Authors: Steve Reinhardt
32//          Korey Sewell
33
34// Basic instruction class declaration template.
35def template BasicDeclare {{
36        /**
37         * Static instruction class for "%(mnemonic)s".
38         */
39        class %(class_name)s : public %(base_class)s
40        {
41          public:
42                /// Constructor.
43                %(class_name)s(MachInst machInst);
44                Fault execute(ExecContext *, Trace::InstRecord *) const;
45        };
46}};
47
48// Basic instruction class constructor template.
49def template BasicConstructor {{
50        %(class_name)s::%(class_name)s(MachInst machInst)  : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s)
51        {
52                %(constructor)s;
53        }
54}};
55
56
57// Basic instruction class execute method template.
58def template BasicExecute {{
59        Fault %(class_name)s::execute(
60            ExecContext *xc, Trace::InstRecord *traceData) const
61        {
62                Fault fault = NoFault;
63
64                %(fp_enable_check)s;
65                %(op_decl)s;
66                %(op_rd)s;
67                if(fault == NoFault)
68                {
69                  %(code)s;
70                  if(fault == NoFault){
71                    %(op_wb)s;
72                  }
73                }
74                return fault;
75        }
76}};
77
78// Basic decode template.
79def template BasicDecode {{
80        return new %(class_name)s(machInst);
81}};
82
83// Basic decode template, passing mnemonic in as string arg to constructor.
84def template BasicDecodeWithMnemonic {{
85        return new %(class_name)s("%(mnemonic)s", machInst);
86}};
87
88// The most basic instruction format...
89def format BasicOp(code, *flags) {{
90        iop = InstObjParams(name, Name, 'MipsStaticInst', code, flags)
91        header_output = BasicDeclare.subst(iop)
92        decoder_output = BasicConstructor.subst(iop)
93        decode_block = BasicDecode.subst(iop)
94        exec_output = BasicExecute.subst(iop)
95}};
96