string.isa revision 5163:f08b480df4c3 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 The Hewlett-Packard Development Company
4// All rights reserved.
5//
6// Redistribution and use of this software in source and binary forms,
7// with or without modification, are permitted provided that the
8// following conditions are met:
9//
10// The software must be used only for Non-Commercial Use which means any
11// use which is NOT directed to receiving any direct monetary
12// compensation for, or commercial advantage from such use.  Illustrative
13// examples of non-commercial use are academic research, personal study,
14// teaching, education and corporate research & development.
15// Illustrative examples of commercial use are distributing products for
16// commercial advantage and providing services using the software for
17// commercial advantage.
18//
19// If you wish to use this software or functionality therein that may be
20// covered by patents for commercial use, please contact:
21//     Director of Intellectual Property Licensing
22//     Office of Strategy and Technology
23//     Hewlett-Packard Company
24//     1501 Page Mill Road
25//     Palo Alto, California  94304
26//
27// Redistributions of source code must retain the above copyright notice,
28// this list of conditions and the following disclaimer.  Redistributions
29// in binary form must reproduce the above copyright notice, this list of
30// conditions and the following disclaimer in the documentation and/or
31// other materials provided with the distribution.  Neither the name of
32// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
33// contributors may be used to endorse or promote products derived from
34// this software without specific prior written permission.  No right of
35// sublicense is granted herewith.  Derivatives of the software and
36// output created using the software may be prepared, but only for
37// Non-Commercial Uses.  Derivatives of the software may be shared with
38// others provided: (i) the others agree to abide by the list of
39// conditions herein which includes the Non-Commercial Use restrictions;
40// and (ii) such Derivatives of the software include the above copyright
41// notice to acknowledge the contribution from this software where
42// applicable, this list of conditions and the disclaimer below.
43//
44// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
45// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
46// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
47// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
48// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
49// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
50// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
54// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55//
56// Authors: Gabe Black
57
58//////////////////////////////////////////////////////////////////////////
59//
60// String Instructions
61//
62//////////////////////////////////////////////////////////////////////////
63
64def format StringTestInst(*opTypeSet) {{
65    allBlocks = OutputBlocks()
66
67    regBlocks = specializeInst(Name, list(opTypeSet), EmulEnv())
68    eBlocks = specializeInst(Name + "_E", list(opTypeSet), EmulEnv())
69    nBlocks = specializeInst(Name + "_N", list(opTypeSet), EmulEnv())
70
71    for blocks in (regBlocks, eBlocks, nBlocks):
72        allBlocks.header_output += blocks.header_output
73        allBlocks.decoder_output += blocks.decoder_output
74        allBlocks.exec_output += blocks.exec_output
75
76    allBlocks.decode_block = '''
77        if (LEGACY_REP) {
78            %s
79        } else if (LEGACY_REPNE) {
80            %s
81        } else {
82            %s
83        }
84    ''' % (eBlocks.decode_block, nBlocks.decode_block, regBlocks.decode_block)
85
86    (header_output, decoder_output,
87     decode_block, exec_output) = allBlocks.makeList()
88}};
89
90def format StringInst(*opTypeSet) {{
91    allBlocks = OutputBlocks()
92
93    regBlocks = specializeInst(Name, list(opTypeSet), EmulEnv())
94    eBlocks = specializeInst(Name + "_E", list(opTypeSet), EmulEnv())
95
96    for blocks in (regBlocks, eBlocks):
97        allBlocks.header_output += blocks.header_output
98        allBlocks.decoder_output += blocks.decoder_output
99        allBlocks.exec_output += blocks.exec_output
100
101    allBlocks.decode_block = '''
102        if (LEGACY_REP) {
103            %s
104        } else if (LEGACY_REPNE) {
105            // The repne prefix is illegal
106            return new MicroFault(machInst, "illprefix", new InvalidOpcode, 0);
107        } else {
108            %s
109        }
110    ''' % (eBlocks.decode_block, regBlocks.decode_block)
111
112    (header_output, decoder_output,
113     decode_block, exec_output) = allBlocks.makeList()
114}};
115