util.isa revision 7045:e21fe6a62b1c 
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    # Some CPU models execute the memory operation as an atomic unit,
42    # while others want to separate them into an effective address
43    # computation and a memory access operation.  As a result, we need
44    # to generate three StaticInst objects.  Note that the latter two
45    # are nested inside the larger "atomic" one.
46
47    # Generate InstObjParams for each of the three objects.  Note that
48    # they differ only in the set of code objects contained (which in
49    # turn affects the object's overall operand list).
50    iop = InstObjParams(name, Name, base_class,
51                        { 'ea_code':ea_code, 'memacc_code':memacc_code, 'postacc_code':postacc_code },
52                        inst_flags)
53
54    if mem_flags:
55        mem_flags = [ 'Request::%s' % flag for flag in mem_flags ]
56        s = '\n\tmemAccessFlags = ' + string.join(mem_flags, '|') + ';'
57        iop.constructor += s
58
59    # select templates
60
61    # The InitiateAcc template is the same for StoreCond templates as the
62    # corresponding Store template..
63    StoreCondInitiateAcc = StoreInitiateAcc
64
65    fullExecTemplate = eval(exec_template_base + 'Execute')
66    initiateAccTemplate = eval(exec_template_base + 'InitiateAcc')
67    completeAccTemplate = eval(exec_template_base + 'CompleteAcc')
68
69    # (header_output, decoder_output, decode_block, exec_output)
70    return (LoadStoreDeclare.subst(iop),
71            LoadStoreConstructor.subst(iop),
72            decode_template.subst(iop),
73            fullExecTemplate.subst(iop)
74            + EACompExecute.subst(iop)
75            + initiateAccTemplate.subst(iop)
76            + completeAccTemplate.subst(iop))
77}};
78
79output header {{
80        std::string inst2string(MachInst machInst);
81}};
82
83output decoder {{
84
85std::string inst2string(MachInst machInst)
86{
87    string str = "";
88    uint32_t mask = 0x80000000;
89
90    for(int i=0; i < 32; i++) {
91        if ((machInst & mask) == 0) {
92            str += "0";
93        } else {
94            str += "1";
95        }
96
97        mask = mask >> 1;
98    }
99
100    return str;
101}
102
103}};
104