static_inst.cc revision 6361 
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#include "arch/x86/insts/static_inst.hh"
59#include "arch/x86/segmentregs.hh"
60
61namespace X86ISA
62{
63    void X86StaticInst::printMnemonic(std::ostream &os,
64            const char * mnemonic) const
65    {
66        ccprintf(os, "  %s   ", mnemonic);
67    }
68
69    void X86StaticInst::printMnemonic(std::ostream &os,
70            const char * instMnemonic, const char * mnemonic) const
71    {
72        ccprintf(os, "  %s : %s   ", instMnemonic, mnemonic);
73    }
74
75    void X86StaticInst::printSegment(std::ostream &os, int segment) const
76    {
77        switch (segment)
78        {
79          case SEGMENT_REG_ES:
80            ccprintf(os, "ES");
81            break;
82          case SEGMENT_REG_CS:
83            ccprintf(os, "CS");
84            break;
85          case SEGMENT_REG_SS:
86            ccprintf(os, "SS");
87            break;
88          case SEGMENT_REG_DS:
89            ccprintf(os, "DS");
90            break;
91          case SEGMENT_REG_FS:
92            ccprintf(os, "FS");
93            break;
94          case SEGMENT_REG_GS:
95            ccprintf(os, "GS");
96            break;
97          case SEGMENT_REG_HS:
98            ccprintf(os, "HS");
99            break;
100          case SEGMENT_REG_TSL:
101            ccprintf(os, "TSL");
102            break;
103          case SEGMENT_REG_TSG:
104            ccprintf(os, "TSG");
105            break;
106          case SEGMENT_REG_LS:
107            ccprintf(os, "LS");
108            break;
109          case SEGMENT_REG_MS:
110            ccprintf(os, "MS");
111            break;
112          case SYS_SEGMENT_REG_TR:
113            ccprintf(os, "TR");
114            break;
115          case SYS_SEGMENT_REG_IDTR:
116            ccprintf(os, "IDTR");
117            break;
118          default:
119            panic("Unrecognized segment %d\n", segment);
120        }
121    }
122
123    void
124    X86StaticInst::printSrcReg(std::ostream &os, int reg, int size) const
125    {
126        if(_numSrcRegs > reg)
127            printReg(os, _srcRegIdx[reg], size);
128    }
129
130    void
131    X86StaticInst::printDestReg(std::ostream &os, int reg, int size) const
132    {
133        if(_numDestRegs > reg)
134            printReg(os, _destRegIdx[reg], size);
135    }
136
137    void
138    X86StaticInst::printReg(std::ostream &os, int reg, int size) const
139    {
140        assert(size == 1 || size == 2 || size == 4 || size == 8);
141        static const char * abcdFormats[9] =
142            {"", "%s",  "%sx",  "", "e%sx", "", "", "", "r%sx"};
143        static const char * piFormats[9] =
144            {"", "%s",  "%s",   "", "e%s",  "", "", "", "r%s"};
145        static const char * longFormats[9] =
146            {"", "r%sb", "r%sw", "", "r%sd", "", "", "", "r%s"};
147        static const char * microFormats[9] =
148            {"", "t%db", "t%dw", "", "t%dd", "", "", "", "t%d"};
149
150        if (reg < FP_Base_DepTag) {
151            const char * suffix = "";
152            bool fold = reg & IntFoldBit;
153            reg &= ~IntFoldBit;
154
155            if(fold)
156                suffix = "h";
157            else if(reg < 8 && size == 1)
158                suffix = "l";
159
160            switch (reg) {
161              case INTREG_RAX:
162                ccprintf(os, abcdFormats[size], "a");
163                break;
164              case INTREG_RBX:
165                ccprintf(os, abcdFormats[size], "b");
166                break;
167              case INTREG_RCX:
168                ccprintf(os, abcdFormats[size], "c");
169                break;
170              case INTREG_RDX:
171                ccprintf(os, abcdFormats[size], "d");
172                break;
173              case INTREG_RSP:
174                ccprintf(os, piFormats[size], "sp");
175                break;
176              case INTREG_RBP:
177                ccprintf(os, piFormats[size], "bp");
178                break;
179              case INTREG_RSI:
180                ccprintf(os, piFormats[size], "si");
181                break;
182              case INTREG_RDI:
183                ccprintf(os, piFormats[size], "di");
184                break;
185              case INTREG_R8W:
186                ccprintf(os, longFormats[size], "8");
187                break;
188              case INTREG_R9W:
189                ccprintf(os, longFormats[size], "9");
190                break;
191              case INTREG_R10W:
192                ccprintf(os, longFormats[size], "10");
193                break;
194              case INTREG_R11W:
195                ccprintf(os, longFormats[size], "11");
196                break;
197              case INTREG_R12W:
198                ccprintf(os, longFormats[size], "12");
199                break;
200              case INTREG_R13W:
201                ccprintf(os, longFormats[size], "13");
202                break;
203              case INTREG_R14W:
204                ccprintf(os, longFormats[size], "14");
205                break;
206              case INTREG_R15W:
207                ccprintf(os, longFormats[size], "15");
208                break;
209              default:
210                ccprintf(os, microFormats[size], reg - NUM_INTREGS);
211            }
212            ccprintf(os, suffix);
213        } else if (reg < Ctrl_Base_DepTag) {
214            int fpindex = reg - FP_Base_DepTag;
215            if(fpindex < NumMMXRegs) {
216                ccprintf(os, "%%mmx%d", reg - FP_Base_DepTag);
217                return;
218            }
219            fpindex -= NumMMXRegs;
220            if(fpindex < NumXMMRegs * 2) {
221                ccprintf(os, "%%xmm%d_%s", fpindex / 2,
222                        (fpindex % 2) ? "high": "low");
223                return;
224            }
225            fpindex -= NumXMMRegs * 2;
226            if(fpindex < NumMicroFpRegs) {
227                ccprintf(os, "%%ufp%d", fpindex);
228                return;
229            }
230            fpindex -= NumMicroFpRegs;
231            ccprintf(os, "%%st(%d)", fpindex);
232        } else {
233            switch (reg - Ctrl_Base_DepTag) {
234              default:
235                ccprintf(os, "%%ctrl%d", reg - Ctrl_Base_DepTag);
236            }
237        }
238    }
239
240    void X86StaticInst::printMem(std::ostream &os, uint8_t segment,
241            uint8_t scale, RegIndex index, RegIndex base,
242            uint64_t disp, uint8_t addressSize, bool rip) const
243    {
244        bool someAddr = false;
245        printSegment(os, segment);
246        os << ":[";
247        if (rip) {
248            os << "rip";
249            someAddr = true;
250        } else {
251            if (scale != 0 && index != ZeroReg)
252            {
253                if(scale != 1)
254                    ccprintf(os, "%d*", scale);
255                printReg(os, index, addressSize);
256                someAddr = true;
257            }
258            if (base != ZeroReg)
259            {
260                if(someAddr)
261                    os << " + ";
262                printReg(os, base, addressSize);
263                someAddr = true;
264            }
265        }
266        if (disp != 0)
267        {
268            if(someAddr)
269                os << " + ";
270            ccprintf(os, "%#x", disp);
271            someAddr = true;
272        }
273        if (!someAddr)
274            os << "0";
275        os << "]";
276    }
277
278    std::string X86StaticInst::generateDisassembly(Addr pc,
279        const SymbolTable *symtab) const
280    {
281        std::stringstream ss;
282
283        printMnemonic(ss, mnemonic);
284
285        return ss.str();
286    }
287}
288