string.isa revision 10474:799c8ee4ecba 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 The Hewlett-Packard Development Company
4// All rights reserved.
5//
6// The license below extends only to copyright in the software and shall
7// not be construed as granting a license to any other intellectual
8// property including but not limited to intellectual property relating
9// to a hardware implementation of the functionality of the software
10// licensed hereunder.  You may use the software subject to the license
11// terms below provided that you ensure that this notice is replicated
12// unmodified and in its entirety in all distributions of the software,
13// modified or unmodified, in source code or in binary form.
14//
15// Redistribution and use in source and binary forms, with or without
16// modification, are permitted provided that the following conditions are
17// met: redistributions of source code must retain the above copyright
18// notice, this list of conditions and the following disclaimer;
19// redistributions in binary form must reproduce the above copyright
20// notice, this list of conditions and the following disclaimer in the
21// documentation and/or other materials provided with the distribution;
22// neither the name of the copyright holders nor the names of its
23// contributors may be used to endorse or promote products derived from
24// this software without specific prior written permission.
25//
26// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37//
38// Authors: Gabe Black
39
40//////////////////////////////////////////////////////////////////////////
41//
42// String Instructions
43//
44//////////////////////////////////////////////////////////////////////////
45
46def format StringTestInst(*opTypeSet) {{
47    allBlocks = OutputBlocks()
48
49    regBlocks = specializeInst(Name, list(opTypeSet), EmulEnv())
50    eBlocks = specializeInst(Name + "_E", list(opTypeSet), EmulEnv())
51    nBlocks = specializeInst(Name + "_N", list(opTypeSet), EmulEnv())
52
53    for blocks in (regBlocks, eBlocks, nBlocks):
54        allBlocks.header_output += blocks.header_output
55        allBlocks.decoder_output += blocks.decoder_output
56        allBlocks.exec_output += blocks.exec_output
57
58    allBlocks.decode_block = '''
59        if (LEGACY_REP) {
60            %s
61        } else if (LEGACY_REPNE) {
62            %s
63        } else {
64            %s
65        }
66    ''' % (eBlocks.decode_block, nBlocks.decode_block, regBlocks.decode_block)
67
68    (header_output, decoder_output,
69     decode_block, exec_output) = allBlocks.makeList()
70}};
71
72def format StringInst(*opTypeSet) {{
73    allBlocks = OutputBlocks()
74
75    regBlocks = specializeInst(Name, list(opTypeSet), EmulEnv())
76    eBlocks = specializeInst(Name + "_E", list(opTypeSet), EmulEnv())
77
78    for blocks in (regBlocks, eBlocks):
79        allBlocks.header_output += blocks.header_output
80        allBlocks.decoder_output += blocks.decoder_output
81        allBlocks.exec_output += blocks.exec_output
82
83    allBlocks.decode_block = '''
84        if (LEGACY_REP) {
85            %s
86        } else if (LEGACY_REPNE) {
87            // The repne prefix is illegal
88            return new MicroFault(machInst, "illprefix", 0,
89                                  std::make_shared<InvalidOpcode>(), 0);
90        } else {
91            %s
92        }
93    ''' % (eBlocks.decode_block, regBlocks.decode_block)
94
95    (header_output, decoder_output,
96     decode_block, exec_output) = allBlocks.makeList()
97}};
98