microldstop.hh revision 5965:71f8d7c12619 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary
11 * compensation for, or commercial advantage from such use.  Illustrative
12 * examples of non-commercial use are academic research, personal study,
13 * teaching, education and corporate research & development.
14 * Illustrative examples of commercial use are distributing products for
15 * commercial advantage and providing services using the software for
16 * commercial advantage.
17 *
18 * If you wish to use this software or functionality therein that may be
19 * covered by patents for commercial use, please contact:
20 *     Director of Intellectual Property Licensing
21 *     Office of Strategy and Technology
22 *     Hewlett-Packard Company
23 *     1501 Page Mill Road
24 *     Palo Alto, California  94304
25 *
26 * Redistributions of source code must retain the above copyright notice,
27 * this list of conditions and the following disclaimer.  Redistributions
28 * in binary form must reproduce the above copyright notice, this list of
29 * conditions and the following disclaimer in the documentation and/or
30 * other materials provided with the distribution.  Neither the name of
31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
32 * contributors may be used to endorse or promote products derived from
33 * this software without specific prior written permission.  No right of
34 * sublicense is granted herewith.  Derivatives of the software and
35 * output created using the software may be prepared, but only for
36 * Non-Commercial Uses.  Derivatives of the software may be shared with
37 * others provided: (i) the others agree to abide by the list of
38 * conditions herein which includes the Non-Commercial Use restrictions;
39 * and (ii) such Derivatives of the software include the above copyright
40 * notice to acknowledge the contribution from this software where
41 * applicable, this list of conditions and the disclaimer below.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *
55 * Authors: Gabe Black
56 */
57
58#ifndef __ARCH_X86_INSTS_MICROLDSTOP_HH__
59#define __ARCH_X86_INSTS_MICROLDSTOP_HH__
60
61#include "arch/x86/insts/microop.hh"
62#include "mem/packet.hh"
63#include "mem/request.hh"
64
65namespace X86ISA
66{
67    static const Request::FlagsType SegmentFlagMask = mask(4);
68    static const int FlagShift = 4;
69    enum FlagBit {
70        CPL0FlagBit = 1,
71        AddrSizeFlagBit = 2
72    };
73
74    /**
75     * Base class for load and store ops
76     */
77    class LdStOp : public X86MicroopBase
78    {
79      protected:
80        const uint8_t scale;
81        const RegIndex index;
82        const RegIndex base;
83        const uint64_t disp;
84        const uint8_t segment;
85        const RegIndex data;
86        const uint8_t dataSize;
87        const uint8_t addressSize;
88        const Request::FlagsType memFlags;
89        RegIndex foldOBit, foldABit;
90
91        //Constructor
92        LdStOp(ExtMachInst _machInst,
93                const char * mnem, const char * _instMnem,
94                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
95                uint8_t _scale, RegIndex _index, RegIndex _base,
96                uint64_t _disp, uint8_t _segment,
97                RegIndex _data,
98                uint8_t _dataSize, uint8_t _addressSize,
99                Request::FlagsType _memFlags,
100                OpClass __opClass) :
101        X86MicroopBase(machInst, mnem, _instMnem,
102                isMicro, isDelayed, isFirst, isLast, __opClass),
103                scale(_scale), index(_index), base(_base),
104                disp(_disp), segment(_segment),
105                data(_data),
106                dataSize(_dataSize), addressSize(_addressSize),
107                memFlags(_memFlags | _segment)
108        {
109            foldOBit = (dataSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0;
110            foldABit =
111                (addressSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0;
112        }
113
114        std::string generateDisassembly(Addr pc,
115            const SymbolTable *symtab) const;
116
117        template<class Context, class MemType>
118        Fault read(Context *xc, Addr EA, MemType & Mem, unsigned flags) const
119        {
120            Fault fault = NoFault;
121            switch(dataSize)
122            {
123              case 1:
124                fault = xc->read(EA, (uint8_t&)Mem, flags);
125                break;
126              case 2:
127                fault = xc->read(EA, (uint16_t&)Mem, flags);
128                break;
129              case 4:
130                fault = xc->read(EA, (uint32_t&)Mem, flags);
131                break;
132              case 8:
133                fault = xc->read(EA, (uint64_t&)Mem, flags);
134                break;
135              default:
136                panic("Bad operand size %d for read at %#x.\n", dataSize, EA);
137            }
138            return fault;
139        }
140
141        template<class Context, class MemType>
142        Fault write(Context *xc, MemType & Mem, Addr EA, unsigned flags) const
143        {
144            Fault fault = NoFault;
145            switch(dataSize)
146            {
147              case 1:
148                fault = xc->write((uint8_t&)Mem, EA, flags, 0);
149                break;
150              case 2:
151                fault = xc->write((uint16_t&)Mem, EA, flags, 0);
152                break;
153              case 4:
154                fault = xc->write((uint32_t&)Mem, EA, flags, 0);
155                break;
156              case 8:
157                fault = xc->write((uint64_t&)Mem, EA, flags, 0);
158                break;
159              default:
160                panic("Bad operand size %d for write at %#x.\n", dataSize, EA);
161            }
162            return fault;
163        }
164
165        uint64_t
166        get(PacketPtr pkt) const
167        {
168            switch(dataSize)
169            {
170              case 1:
171                return pkt->get<uint8_t>();
172              case 2:
173                return pkt->get<uint16_t>();
174              case 4:
175                return pkt->get<uint32_t>();
176              case 8:
177                return pkt->get<uint64_t>();
178              default:
179                panic("Bad operand size %d for read at %#x.\n",
180                        dataSize, pkt->getAddr());
181            }
182        }
183    };
184}
185
186#endif //__ARCH_X86_INSTS_MICROLDSTOP_HH__
187