static_inst.cc revision 10935:acd48ddd725f 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder.  You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions are
17 * met: redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer;
19 * redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution;
22 * neither the name of the copyright holders nor the names of its
23 * contributors may be used to endorse or promote products derived from
24 * this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 *
38 * Authors: Gabe Black
39 */
40
41#include "arch/x86/insts/static_inst.hh"
42#include "arch/x86/regs/segment.hh"
43#include "cpu/reg_class.hh"
44
45namespace X86ISA
46{
47    void X86StaticInst::printMnemonic(std::ostream &os,
48            const char * mnemonic) const
49    {
50        ccprintf(os, "  %s   ", mnemonic);
51    }
52
53    void X86StaticInst::printMnemonic(std::ostream &os,
54            const char * instMnemonic, const char * mnemonic) const
55    {
56        ccprintf(os, "  %s : %s   ", instMnemonic, mnemonic);
57    }
58
59    void X86StaticInst::printSegment(std::ostream &os, int segment) const
60    {
61        switch (segment)
62        {
63          case SEGMENT_REG_ES:
64            ccprintf(os, "ES");
65            break;
66          case SEGMENT_REG_CS:
67            ccprintf(os, "CS");
68            break;
69          case SEGMENT_REG_SS:
70            ccprintf(os, "SS");
71            break;
72          case SEGMENT_REG_DS:
73            ccprintf(os, "DS");
74            break;
75          case SEGMENT_REG_FS:
76            ccprintf(os, "FS");
77            break;
78          case SEGMENT_REG_GS:
79            ccprintf(os, "GS");
80            break;
81          case SEGMENT_REG_HS:
82            ccprintf(os, "HS");
83            break;
84          case SEGMENT_REG_TSL:
85            ccprintf(os, "TSL");
86            break;
87          case SEGMENT_REG_TSG:
88            ccprintf(os, "TSG");
89            break;
90          case SEGMENT_REG_LS:
91            ccprintf(os, "LS");
92            break;
93          case SEGMENT_REG_MS:
94            ccprintf(os, "MS");
95            break;
96          case SYS_SEGMENT_REG_TR:
97            ccprintf(os, "TR");
98            break;
99          case SYS_SEGMENT_REG_IDTR:
100            ccprintf(os, "IDTR");
101            break;
102          default:
103            panic("Unrecognized segment %d\n", segment);
104        }
105    }
106
107    void
108    X86StaticInst::printSrcReg(std::ostream &os, int reg, int size) const
109    {
110        if(_numSrcRegs > reg)
111            printReg(os, _srcRegIdx[reg], size);
112    }
113
114    void
115    X86StaticInst::printDestReg(std::ostream &os, int reg, int size) const
116    {
117        if(_numDestRegs > reg)
118            printReg(os, _destRegIdx[reg], size);
119    }
120
121    void
122    X86StaticInst::printReg(std::ostream &os, int reg, int size) const
123    {
124        assert(size == 1 || size == 2 || size == 4 || size == 8);
125        static const char * abcdFormats[9] =
126            {"", "%s",  "%sx",  "", "e%sx", "", "", "", "r%sx"};
127        static const char * piFormats[9] =
128            {"", "%s",  "%s",   "", "e%s",  "", "", "", "r%s"};
129        static const char * longFormats[9] =
130            {"", "r%sb", "r%sw", "", "r%sd", "", "", "", "r%s"};
131        static const char * microFormats[9] =
132            {"", "t%db", "t%dw", "", "t%dd", "", "", "", "t%d"};
133
134        RegIndex rel_reg;
135
136        switch (regIdxToClass(reg, &rel_reg)) {
137          case IntRegClass: {
138            const char * suffix = "";
139            bool fold = rel_reg & IntFoldBit;
140            rel_reg &= ~IntFoldBit;
141
142            if(fold)
143                suffix = "h";
144            else if(rel_reg < 8 && size == 1)
145                suffix = "l";
146
147            switch (rel_reg) {
148              case INTREG_RAX:
149                ccprintf(os, abcdFormats[size], "a");
150                break;
151              case INTREG_RBX:
152                ccprintf(os, abcdFormats[size], "b");
153                break;
154              case INTREG_RCX:
155                ccprintf(os, abcdFormats[size], "c");
156                break;
157              case INTREG_RDX:
158                ccprintf(os, abcdFormats[size], "d");
159                break;
160              case INTREG_RSP:
161                ccprintf(os, piFormats[size], "sp");
162                break;
163              case INTREG_RBP:
164                ccprintf(os, piFormats[size], "bp");
165                break;
166              case INTREG_RSI:
167                ccprintf(os, piFormats[size], "si");
168                break;
169              case INTREG_RDI:
170                ccprintf(os, piFormats[size], "di");
171                break;
172              case INTREG_R8W:
173                ccprintf(os, longFormats[size], "8");
174                break;
175              case INTREG_R9W:
176                ccprintf(os, longFormats[size], "9");
177                break;
178              case INTREG_R10W:
179                ccprintf(os, longFormats[size], "10");
180                break;
181              case INTREG_R11W:
182                ccprintf(os, longFormats[size], "11");
183                break;
184              case INTREG_R12W:
185                ccprintf(os, longFormats[size], "12");
186                break;
187              case INTREG_R13W:
188                ccprintf(os, longFormats[size], "13");
189                break;
190              case INTREG_R14W:
191                ccprintf(os, longFormats[size], "14");
192                break;
193              case INTREG_R15W:
194                ccprintf(os, longFormats[size], "15");
195                break;
196              default:
197                ccprintf(os, microFormats[size], rel_reg - NUM_INTREGS);
198            }
199            ccprintf(os, suffix);
200            break;
201          }
202
203          case FloatRegClass: {
204            if (rel_reg < NumMMXRegs) {
205                ccprintf(os, "%%mmx%d", rel_reg);
206                return;
207            }
208            rel_reg -= NumMMXRegs;
209            if (rel_reg < NumXMMRegs * 2) {
210                ccprintf(os, "%%xmm%d_%s", rel_reg / 2,
211                        (rel_reg % 2) ? "high": "low");
212                return;
213            }
214            rel_reg -= NumXMMRegs * 2;
215            if (rel_reg < NumMicroFpRegs) {
216                ccprintf(os, "%%ufp%d", rel_reg);
217                return;
218            }
219            rel_reg -= NumMicroFpRegs;
220            ccprintf(os, "%%st(%d)", rel_reg);
221            break;
222          }
223
224          case CCRegClass:
225            ccprintf(os, "%%cc%d", rel_reg);
226            break;
227
228          case MiscRegClass:
229            switch (rel_reg) {
230              default:
231                ccprintf(os, "%%ctrl%d", rel_reg);
232            }
233            break;
234        }
235    }
236
237    void X86StaticInst::printMem(std::ostream &os, uint8_t segment,
238            uint8_t scale, RegIndex index, RegIndex base,
239            uint64_t disp, uint8_t addressSize, bool rip) const
240    {
241        bool someAddr = false;
242        printSegment(os, segment);
243        os << ":[";
244        if (rip) {
245            os << "rip";
246            someAddr = true;
247        } else {
248            if (scale != 0 && index != ZeroReg)
249            {
250                if(scale != 1)
251                    ccprintf(os, "%d*", scale);
252                printReg(os, index, addressSize);
253                someAddr = true;
254            }
255            if (base != ZeroReg)
256            {
257                if(someAddr)
258                    os << " + ";
259                printReg(os, base, addressSize);
260                someAddr = true;
261            }
262        }
263        if (disp != 0)
264        {
265            if(someAddr)
266                os << " + ";
267            ccprintf(os, "%#x", disp);
268            someAddr = true;
269        }
270        if (!someAddr)
271            os << "0";
272        os << "]";
273    }
274
275    std::string X86StaticInst::generateDisassembly(Addr pc,
276        const SymbolTable *symtab) const
277    {
278        std::stringstream ss;
279
280        printMnemonic(ss, mnemonic);
281
282        return ss.str();
283    }
284}
285