misc.cc revision 7202:b99579129992 
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 */
39
40#include "arch/arm/insts/misc.hh"
41
42std::string
43MrsOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
44{
45    std::stringstream ss;
46    printMnemonic(ss);
47    printReg(ss, dest);
48    ss << ", ";
49    bool foundPsr = false;
50    for (unsigned i = 0; i < numSrcRegs(); i++) {
51        int idx = srcRegIdx(i);
52        if (idx < Ctrl_Base_DepTag) {
53            continue;
54        }
55        idx -= Ctrl_Base_DepTag;
56        if (idx == MISCREG_CPSR) {
57            ss << "cpsr";
58            foundPsr = true;
59            break;
60        }
61        if (idx == MISCREG_SPSR) {
62            ss << "spsr";
63            foundPsr = true;
64            break;
65        }
66    }
67    if (!foundPsr) {
68        ss << "????";
69    }
70    return ss.str();
71}
72
73void
74MsrBase::printMsrBase(std::ostream &os) const
75{
76    printMnemonic(os);
77    bool apsr = false;
78    bool foundPsr = false;
79    for (unsigned i = 0; i < numDestRegs(); i++) {
80        int idx = destRegIdx(i);
81        if (idx < Ctrl_Base_DepTag) {
82            continue;
83        }
84        idx -= Ctrl_Base_DepTag;
85        if (idx == MISCREG_CPSR) {
86            os << "cpsr_";
87            foundPsr = true;
88            break;
89        }
90        if (idx == MISCREG_SPSR) {
91            if (bits(byteMask, 1, 0)) {
92                os << "spsr_";
93            } else {
94                os << "apsr_";
95                apsr = true;
96            }
97            foundPsr = true;
98            break;
99        }
100    }
101    if (!foundPsr) {
102        os << "????";
103        return;
104    }
105    if (bits(byteMask, 3)) {
106        if (apsr) {
107            os << "nzcvq";
108        } else {
109            os << "f";
110        }
111    }
112    if (bits(byteMask, 2)) {
113        if (apsr) {
114            os << "g";
115        } else {
116            os << "s";
117        }
118    }
119    if (bits(byteMask, 1)) {
120        os << "x";
121    }
122    if (bits(byteMask, 0)) {
123        os << "c";
124    }
125}
126
127std::string
128MsrImmOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
129{
130    std::stringstream ss;
131    printMsrBase(ss);
132    ccprintf(ss, ", #%#x", imm);
133    return ss.str();
134}
135
136std::string
137MsrRegOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
138{
139    std::stringstream ss;
140    printMsrBase(ss);
141    ss << ", ";
142    printReg(ss, op1);
143    return ss.str();
144}
145