static_inst.hh revision 11321:02e930db812d 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
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#ifndef __ARCH_X86_INSTS_STATICINST_HH__
41#define __ARCH_X86_INSTS_STATICINST_HH__
42
43#include "base/trace.hh"
44#include "cpu/static_inst.hh"
45#include "debug/X86.hh"
46
47namespace X86ISA
48{
49    /**
50     * Class for register indices passed to instruction constructors. Using a
51     * wrapper struct for these lets take advantage of the compiler's type
52     * checking.
53     */
54    struct InstRegIndex
55    {
56        RegIndex idx;
57        explicit InstRegIndex(RegIndex _idx) : idx(_idx)
58        {}
59    };
60
61    /**
62     * Base class for all X86 static instructions.
63     */
64
65    class X86StaticInst : public StaticInst
66    {
67      protected:
68        // Constructor.
69        X86StaticInst(const char *mnem,
70             ExtMachInst _machInst, OpClass __opClass)
71                : StaticInst(mnem, _machInst, __opClass)
72            {
73            }
74
75        std::string generateDisassembly(Addr pc,
76            const SymbolTable *symtab) const;
77
78        void printMnemonic(std::ostream &os, const char * mnemonic) const;
79        void printMnemonic(std::ostream &os, const char * instMnemonic,
80                const char * mnemonic) const;
81
82        void printSegment(std::ostream &os, int segment) const;
83
84        void printReg(std::ostream &os, int reg, int size) const;
85        void printSrcReg(std::ostream &os, int reg, int size) const;
86        void printDestReg(std::ostream &os, int reg, int size) const;
87        void printMem(std::ostream &os, uint8_t segment,
88                uint8_t scale, RegIndex index, RegIndex base,
89                uint64_t disp, uint8_t addressSize, bool rip) const;
90
91        inline uint64_t merge(uint64_t into, uint64_t val, int size) const
92        {
93            X86IntReg reg = into;
94            if (_destRegIdx[0] & IntFoldBit)
95            {
96                reg.H = val;
97                return reg;
98            }
99            switch(size)
100            {
101              case 1:
102                reg.L = val;
103                break;
104              case 2:
105                reg.X = val;
106                break;
107              case 4:
108                //XXX Check if this should be zeroed or sign extended
109                reg = 0;
110                reg.E = val;
111                break;
112              case 8:
113                reg.R = val;
114                break;
115              default:
116                panic("Tried to merge with unrecognized size %d.\n", size);
117            }
118            return reg;
119        }
120
121        inline uint64_t pick(uint64_t from, int idx, int size) const
122        {
123            X86IntReg reg = from;
124            DPRINTF(X86, "Picking with size %d\n", size);
125            if (_srcRegIdx[idx] & IntFoldBit)
126                return reg.H;
127            switch(size)
128            {
129              case 1:
130                return reg.L;
131              case 2:
132                return reg.X;
133              case 4:
134                return reg.E;
135              case 8:
136                return reg.R;
137              default:
138                panic("Tried to pick with unrecognized size %d.\n", size);
139            }
140        }
141
142        inline int64_t signedPick(uint64_t from, int idx, int size) const
143        {
144            X86IntReg reg = from;
145            DPRINTF(X86, "Picking with size %d\n", size);
146            if (_srcRegIdx[idx] & IntFoldBit)
147                return reg.SH;
148            switch(size)
149            {
150              case 1:
151                return reg.SL;
152              case 2:
153                return reg.SX;
154              case 4:
155                return reg.SE;
156              case 8:
157                return reg.SR;
158              default:
159                panic("Tried to pick with unrecognized size %d.\n", size);
160            }
161        }
162
163        void
164        advancePC(PCState &pcState) const
165        {
166            pcState.advance();
167        }
168    };
169}
170
171#endif //__ARCH_X86_INSTS_STATICINST_HH__
172