util.isa revision 6207 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2003-2005 The Regents of The University of Michigan
4// Copyright (c) 2007 MIPS Technologies, Inc.
5// All rights reserved.
6//
7// Redistribution and use in source and binary forms, with or without
8// modification, are permitted provided that the following conditions are
9// met: redistributions of source code must retain the above copyright
10// notice, this list of conditions and the following disclaimer;
11// redistributions in binary form must reproduce the above copyright
12// notice, this list of conditions and the following disclaimer in the
13// documentation and/or other materials provided with the distribution;
14// neither the name of the copyright holders nor the names of its
15// contributors may be used to endorse or promote products derived from
16// this software without specific prior written permission.
17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29//
30// Authors: Steve Reinhardt
31//          Korey Sewell
32
33let {{
34def LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags,
35                  postacc_code = '', base_class = 'Memory',
36                  decode_template = BasicDecode, exec_template_base = ''):
37    # Make sure flags are in lists (convert to lists if not).
38    mem_flags = makeList(mem_flags)
39    inst_flags = makeList(inst_flags)
40
41    # add hook to get effective addresses into execution trace output.
42    ea_code += '\nif (traceData) { traceData->setAddr(EA); }\n'
43
44    # Some CPU models execute the memory operation as an atomic unit,
45    # while others want to separate them into an effective address
46    # computation and a memory access operation.  As a result, we need
47    # to generate three StaticInst objects.  Note that the latter two
48    # are nested inside the larger "atomic" one.
49
50    # Generate InstObjParams for each of the three objects.  Note that
51    # they differ only in the set of code objects contained (which in
52    # turn affects the object's overall operand list).
53    iop = InstObjParams(name, Name, base_class,
54                        { 'ea_code':ea_code, 'memacc_code':memacc_code, 'postacc_code':postacc_code },
55                        inst_flags)
56
57    if mem_flags:
58        mem_flags = [ 'Request::%s' % flag for flag in mem_flags ]
59        s = '\n\tmemAccessFlags = ' + string.join(mem_flags, '|') + ';'
60        iop.constructor += s
61
62    # select templates
63
64    # The InitiateAcc template is the same for StoreCond templates as the
65    # corresponding Store template..
66    StoreCondInitiateAcc = StoreInitiateAcc
67
68    fullExecTemplate = eval(exec_template_base + 'Execute')
69    initiateAccTemplate = eval(exec_template_base + 'InitiateAcc')
70    completeAccTemplate = eval(exec_template_base + 'CompleteAcc')
71
72    # (header_output, decoder_output, decode_block, exec_output)
73    return (LoadStoreDeclare.subst(iop),
74            LoadStoreConstructor.subst(iop),
75            decode_template.subst(iop),
76            fullExecTemplate.subst(iop)
77            + EACompExecute.subst(iop)
78            + initiateAccTemplate.subst(iop)
79            + completeAccTemplate.subst(iop))
80}};
81
82output header {{
83        std::string inst2string(MachInst machInst);
84}};
85
86output decoder {{
87
88std::string inst2string(MachInst machInst)
89{
90    string str = "";
91    uint32_t mask = 0x80000000;
92
93    for(int i=0; i < 32; i++) {
94        if ((machInst & mask) == 0) {
95            str += "0";
96        } else {
97            str += "1";
98        }
99
100        mask = mask >> 1;
101    }
102
103    return str;
104}
105
106}};
107