static_inst.hh revision 6361:62de7e765286 
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,
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18 * If you wish to use this software or functionality therein that may be
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25 *
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34 * sublicense is granted herewith.  Derivatives of the software and
35 * output created using the software may be prepared, but only for
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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_STATICINST_HH__
59#define __ARCH_X86_INSTS_STATICINST_HH__
60
61#include "base/trace.hh"
62#include "cpu/static_inst.hh"
63
64namespace X86ISA
65{
66    /**
67     * Class for register indices passed to instruction constructors. Using a
68     * wrapper struct for these lets take advantage of the compiler's type
69     * checking.
70     */
71    struct InstRegIndex
72    {
73        RegIndex idx;
74        explicit InstRegIndex(RegIndex _idx) : idx(_idx)
75        {}
76    };
77
78    /**
79     * Base class for all X86 static instructions.
80     */
81
82    class X86StaticInst : public StaticInst
83    {
84      protected:
85        // Constructor.
86        X86StaticInst(const char *mnem,
87             ExtMachInst _machInst, OpClass __opClass)
88                : StaticInst(mnem, _machInst, __opClass)
89            {
90            }
91
92        std::string generateDisassembly(Addr pc,
93            const SymbolTable *symtab) const;
94
95        void printMnemonic(std::ostream &os, const char * mnemonic) const;
96        void printMnemonic(std::ostream &os, const char * instMnemonic,
97                const char * mnemonic) const;
98
99        void printSegment(std::ostream &os, int segment) const;
100
101        void printReg(std::ostream &os, int reg, int size) const;
102        void printSrcReg(std::ostream &os, int reg, int size) const;
103        void printDestReg(std::ostream &os, int reg, int size) const;
104        void printMem(std::ostream &os, uint8_t segment,
105                uint8_t scale, RegIndex index, RegIndex base,
106                uint64_t disp, uint8_t addressSize, bool rip) const;
107
108        inline uint64_t merge(uint64_t into, uint64_t val, int size) const
109        {
110            X86IntReg reg = into;
111            if(_destRegIdx[0] & IntFoldBit)
112            {
113                reg.H = val;
114                return reg;
115            }
116            switch(size)
117            {
118              case 1:
119                reg.L = val;
120                break;
121              case 2:
122                reg.X = val;
123                break;
124              case 4:
125                //XXX Check if this should be zeroed or sign extended
126                reg = 0;
127                reg.E = val;
128                break;
129              case 8:
130                reg.R = val;
131                break;
132              default:
133                panic("Tried to merge with unrecognized size %d.\n", size);
134            }
135            return reg;
136        }
137
138        inline uint64_t pick(uint64_t from, int idx, int size) const
139        {
140            X86IntReg reg = from;
141            DPRINTF(X86, "Picking with size %d\n", size);
142            if(_srcRegIdx[idx] & IntFoldBit)
143                return reg.H;
144            switch(size)
145            {
146              case 1:
147                return reg.L;
148              case 2:
149                return reg.X;
150              case 4:
151                return reg.E;
152              case 8:
153                return reg.R;
154              default:
155                panic("Tried to pick with unrecognized size %d.\n", size);
156            }
157        }
158
159        inline int64_t signedPick(uint64_t from, int idx, int size) const
160        {
161            X86IntReg reg = from;
162            DPRINTF(X86, "Picking with size %d\n", size);
163            if(_srcRegIdx[idx] & IntFoldBit)
164                return reg.SH;
165            switch(size)
166            {
167              case 1:
168                return reg.SL;
169              case 2:
170                return reg.SX;
171              case 4:
172                return reg.SE;
173              case 8:
174                return reg.SR;
175              default:
176                panic("Tried to pick with unrecognized size %d.\n", size);
177            }
178        }
179    };
180}
181
182#endif //__ARCH_X86_INSTS_STATICINST_HH__
183