thumb.isa revision 7107 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2010 ARM Limited
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// Copyright (c) 2009 The Regents of The University of Michigan
16// All rights reserved.
17//
18// Redistribution and use in source and binary forms, with or without
19// modification, are permitted provided that the following conditions are
20// met: redistributions of source code must retain the above copyright
21// notice, this list of conditions and the following disclaimer;
22// redistributions in binary form must reproduce the above copyright
23// notice, this list of conditions and the following disclaimer in the
24// documentation and/or other materials provided with the distribution;
25// neither the name of the copyright holders nor the names of its
26// contributors may be used to endorse or promote products derived from
27// this software without specific prior written permission.
28//
29// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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39// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40//
41// Authors: Gabe Black
42
431: decode BIGTHUMB {
44    // 16 bit thumb instructions.
45    0: decode TOPCODE_15_13 {
46        0x0, 0x1: decode TOPCODE_13_11 {
47            0x0: WarnUnimpl::lsl(); //immediate
48            0x1: WarnUnimpl::lsr(); //immediate
49            0x2: WarnUnimpl::asr(); //immediate
50            0x3: decode TOPCODE_10_9 {
51                0x0: WarnUnimpl::add(); //register
52                0x1: WarnUnimpl::sub(); //register
53                0x2: WarnUnimpl::add(); //3 bit immediate
54                0x3: WarnUnimpl::sub(); //3 bit immediate
55            }
56            0x4: WarnUnimpl::mov(); //immediate
57            0x5: WarnUnimpl::cmp(); //immediate
58            0x6: WarnUnimpl::add(); //8 bit immediate, thumb
59            0x7: WarnUnimpl::sub(); //8 bit immediate, thumb
60        }
61        0x2: decode TOPCODE_12_10 {
62            // Data processing
63            0x0: decode TOPCODE_9_6 {
64                0x0: WarnUnimpl::and(); //register
65                0x1: WarnUnimpl::eor(); //register
66                0x2: WarnUnimpl::lsl(); //register
67                0x3: WarnUnimpl::lsr(); //register
68                0x4: WarnUnimpl::asr(); //register
69                0x5: WarnUnimpl::adc(); //register
70                0x6: WarnUnimpl::sbc(); //register
71                0x7: WarnUnimpl::ror(); //register
72                0x8: WarnUnimpl::tst(); //register
73                0x9: WarnUnimpl::rsb(); //immediate
74                0xa: WarnUnimpl::cmp(); //register (high registers)
75                0xb: WarnUnimpl::cmn(); //register
76                0xc: WarnUnimpl::orr(); //register
77                0xd: WarnUnimpl::mul();
78                0xe: WarnUnimpl::bic(); //register
79                0xf: WarnUnimpl::mvn(); //register
80            }
81            // Special data instructions and branch and exchange
82            0x1: decode TOPCODE_9_6 {
83                0x0: WarnUnimpl::add(); //register (low registers)
84                0x1, 0x2, 0x3: WarnUnimpl::add(); //register (high registers)
85                0x4: WarnUnimpl::unpredictable(); //?
86                0x5, 0x6, 0x7: WarnUnimpl::cmp(); //register
87                0x8: WarnUnimpl::mov(); //register (low registers)
88                0x9, 0xa, 0xb: WarnUnimpl::mov(); //register (high registers)
89                0xc, 0xd: WarnUnimpl::bx();
90                0xe, 0xf: WarnUnimpl::blx(); //register
91            }
92            0x2, 0x3: WarnUnimpl::ldr();
93            default: decode TOPCODE_11_9 {
94                0x0: WarnUnimpl::str(); //register
95                0x1: WarnUnimpl::strh(); //register
96                0x2: WarnUnimpl::strb(); //register
97                0x3: WarnUnimpl::ldrsb(); //register
98                0x4: WarnUnimpl::ldr(); //register
99                0x5: WarnUnimpl::ldrh(); //register
100                0x6: WarnUnimpl::ldrb(); //register
101                0x7: WarnUnimpl::ldrsh(); //register
102            }
103        }
104        0x3: decode TOPCODE_12_11 {
105            0x0: WarnUnimpl::str(); //immediate, thumb
106            0x1: WarnUnimpl::ldr(); //immediate, thumb
107            0x2: WarnUnimpl::strb(); //immediate, thumb
108            0x3: WarnUnimpl::ldrb(); //immediate, thumb
109        }
110        0x4: decode TOPCODE_12_11 {
111            0x0: WarnUnimpl::strh(); //immediate, thumb
112            0x1: WarnUnimpl::ldrh(); //immediate, thumb
113            0x2: WarnUnimpl::str(); //immediate, thumb
114            0x3: WarnUnimpl::ldr(); //immediate, thumb
115        }
116        0x5: decode TOPCODE_12_11 {
117            0x0: WarnUnimpl::adr();
118            0x1: WarnUnimpl::add(); //sp, immediate
119            0x2: decode TOPCODE_10_8 {
120                0x0: decode TOPCODE_7 {
121                    0x0: WarnUnimpl::add(); //sp, immediate
122                    0x1: WarnUnimpl::sub(); //sp, immediate
123                }
124                0x1, 0x3: WarnUnimpl::cbz(); //cbnz too...
125                0x2: decode TOPCODE_7_6 {
126                    0x0: WarnUnimpl::sxth();
127                    0x1: WarnUnimpl::sxtb();
128                    0x2: WarnUnimpl::uxth();
129                    0x3: WarnUnimpl::uxtb();
130                }
131                0x4, 0x5: WarnUnimpl::pop();
132                0x6: decode TOPCODE_7_5 {
133                    0x2: WarnUnimpl::setend();
134                    0x3: WarnUnimpl::cps();
135                }
136            }
137            0x3: decode TOPCODE_10_8 {
138                0x1, 0x3: WarnUnimpl::cbz(); //cbnz too...
139                0x2: decode TOPCODE_7_6 {
140                    0x0: WarnUnimpl::rev();
141                    0x1: WarnUnimpl::rev16();
142                    0x3: WarnUnimpl::revsh();
143                }
144                0x4, 0x5: WarnUnimpl::pop();
145                0x6: WarnUnimpl::bkpt();
146                0x7: decode TOPCODE_3_0 {
147                    0x0: WarnUnimpl::it();
148                    default: decode TOPCODE_7_4 {
149                        0x0: WarnUnimpl::nop();
150                        0x1: WarnUnimpl::yield();
151                        0x2: WarnUnimpl::wfe();
152                        0x3: WarnUnimpl::wfi();
153                        0x4: WarnUnimpl::sev();
154                        default: WarnUnimpl::unallocated_hint();
155                    }
156                }
157            }
158        }
159        0x6: decode TOPCODE_12_11 {
160            0x0: WarnUnimpl::stm(); // also stmia, stmea
161            0x1: WarnUnimpl::ldm(); // also ldmia, ldmea
162            default: decode TOPCODE_11_8 {
163                0xe: WarnUnimpl::undefined(); // permanently undefined
164                0xf: WarnUnimpl::svc(); // formerly swi
165                default: WarnUnimpl::b(); // conditional
166            }
167        }
168        0x7: decode TOPCODE_12_11 {
169            0x0: WarnUnimpl::b(); // unconditional
170        }
171    }
172
173    // 32 bit thumb instructions.
174    1: decode HTOPCODE_12_11 {
175        0x1: decode HTOPCODE_10_9 {
176            0x0: decode HTOPCODE_8_6 {
177                0x0, 0x6: decode HTOPCODE_4 {
178                    0x0: WarnUnimpl::srs();
179                    0x1: WarnUnimpl::rfe();
180                }
181                0x1: decode HTOPCODE_5_4 {
182                    0x0: WarnUnimpl::strex();
183                    0x1: WarnUnimpl::ldrex();
184                    0x2: WarnUnimpl::strd(); // immediate
185                    0x3: decode HTRN {
186                        0xf: WarnUnimpl::ldrd(); // literal
187                        default: WarnUnimpl::ldrd(); // immediate
188                    }
189                }
190                0x2: decode HTOPCODE_4 {
191                    0x0: WarnUnimpl::stm(); // stmia, stmea
192                    0x1: decode HTRN {
193                        0xd: WarnUnimpl::pop();
194                        default: WarnUnimpl::ldm(); // ldmia, ldmfd
195                    }
196                }
197                0x3: decode HTOPCODE_5_4 {
198                    0x0: decode LTOPCODE_7_4 {
199                        0x4: WarnUnimpl::strexb();
200                        0x5: WarnUnimpl::strexh();
201                        0x7: WarnUnimpl::strexd();
202                    }
203                    0x1: decode LTOPCODE_7_4 {
204                        0x0: WarnUnimpl::tbb();
205                        0x1: WarnUnimpl::tbh();
206                        0x4: WarnUnimpl::ldrexb();
207                        0x5: WarnUnimpl::ldrexh();
208                        0x7: WarnUnimpl::ldrexd();
209                    }
210                    0x2: WarnUnimpl::strd(); // immediate
211                    0x3: decode HTRN {
212                        0xf: WarnUnimpl::ldrd(); // literal
213                        default: WarnUnimpl::ldrd(); // immediate
214                    }
215                }
216                0x4: decode HTOPCODE_4 {
217                    0x0: decode HTRN {
218                        0xd: WarnUnimpl::push();
219                        default: WarnUnimpl::stmdb(); // stmfd
220                    }
221                    0x1: WarnUnimpl::ldmdb(); // ldmea
222                }
223                0x5, 0x7: decode HTOPCODE_4 {
224                    0x0: WarnUnimpl::strd(); // immediate
225                    0x1: decode HTRN {
226                        0xf: WarnUnimpl::ldrd(); // literal
227                        default: WarnUnimpl::ldrd(); // immediate
228                    }
229                }
230            }
231            0x1: decode HTOPCODE_8_5 {
232                0x0: decode LTRD {
233                    0xf: decode HTS {
234                        0x1: WarnUnimpl::tst(); // register
235                    }
236                    default: WarnUnimpl::and(); // register
237                }
238                0x1: WarnUnimpl::bic(); // register
239                0x2: decode HTRN {
240                    0xf: WarnUnimpl::mov(); // register
241                    default: WarnUnimpl::orr(); // register
242                }
243                0x3: decode HTRN {
244                    0xf: WarnUnimpl::mvn(); // register
245                    default: WarnUnimpl::orn(); // register
246                }
247                0x4: decode LTRD {
248                    0xf: decode HTS {
249                        0x1: WarnUnimpl::teq(); // register
250                    }
251                    default: WarnUnimpl::eor(); // register
252                }
253                0x6: WarnUnimpl::pkh();
254                0x8: decode LTRD {
255                    0xf: decode HTS {
256                        0x1: WarnUnimpl::cmn(); // register
257                    }
258                    default: WarnUnimpl::add(); // register
259                }
260                0xa: WarnUnimpl::adc(); // register
261                0xb: WarnUnimpl::sbc(); // register
262                0xd: decode LTRD {
263                    0xf: decode HTS {
264                        0x1: WarnUnimpl::cmp(); // register
265                    }
266                    default: WarnUnimpl::sub(); // register
267                }
268                0xe: WarnUnimpl::rsb(); // register
269            }
270            default: decode HTOPCODE_9_8 {
271                0x2: decode LTOPCODE_4 {
272                    0x0: decode LTCOPROC {
273                        0xa, 0xb: decode OPCODE_23_20 {
274##include "vfpdecode.isa"
275                        }
276                        default: WarnUnimpl::cdp(); // cdp2
277                    }
278                    0x1: decode LTCOPROC {
279                        0xa, 0xb: WarnUnimpl::Core_to_extension_transfer();
280                        default: decode HTOPCODE_4 {
281                            0x0: WarnUnimpl::mcr(); // mcr2
282                            0x1: WarnUnimpl::mrc(); // mrc2
283                        }
284                    }
285                }
286                0x3: WarnUnimpl::Advanced_SIMD();
287                default: decode LTCOPROC {
288                    0xa, 0xb: decode HTOPCODE_9_4 {
289                        0x00: WarnUnimpl::undefined();
290                        0x04: WarnUnimpl::mcrr(); // mcrr2
291                        0x05: WarnUnimpl::mrrc(); // mrrc2
292                        0x02, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10,
293                        0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e:
294                            WarnUnimpl::stc(); // stc2
295                        0x03, 0x07, 0x09, 0x0b, 0x0d, 0x0f, 0x11,
296                        0x13, 0x15, 0x17, 0x19, 0x1b, 0x1d, 0x1f:
297                            decode HTRN {
298                                0xf: WarnUnimpl::ldc(); // ldc2 (literal)
299                                default: WarnUnimpl::ldc(); // ldc2 (immediate)
300                            }
301                    }
302                    default: decode HTOPCODE_9_5 {
303                        0x00: WarnUnimpl::undefined();
304                        0x02: WarnUnimpl::SIMD_VFP_64_bit_core_extension_transfer();
305                        0x01, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
306                        0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f:
307                            WarnUnimpl::Extension_register_load_store_instruction();
308                    }
309                }
310            }
311        }
312        0x2: decode LTOPCODE_15 {
313            0x0: decode HTOPCODE_9 {
314                0x0: WarnUnimpl::Data_processing_modified_immediate();
315                0x1: WarnUnimpl::Data_processing_plain_binary_immediate();
316            }
317            0x1: WarnUnimpl::Branches_and_miscellaneous_control();
318        }
319        0x3: decode HTOPCODE_10_9 {
320            0x0: decode HTOPCODE_4 {
321                0x0: decode HTOPCODE_8 {
322                    0x0: WarnUnimpl::Store_single_data_item();
323                    0x1: WarnUnimpl::Advanced_SIMD_or_structure_load_store();
324                }
325                0x1: decode HTOPCODE_6_5 {
326                    0x0: WarnUnimpl::Load_byte_memory_hints();
327                    0x1: WarnUnimpl::Load_halfword_memory_hints();
328                    0x2: WarnUnimpl::Load_word();
329                    0x3: WarnUnimpl::undefined();
330                }
331            }
332            0x1: decode HTOPCODE_8_7 {
333                0x2: WarnUnimpl::Multiply_multiply_accumulate_and_absolute_difference();
334                0x3: WarnUnimpl::Long_multiply_long_multiply_accumulate_and_divide();
335                default: WarnUnimpl::Data_processing_register();
336            }
337            default: decode HTOPCODE_9_8 {
338                0x2: decode LTOPCODE_4 {
339                    0x0: decode LTCOPROC {
340                        0xa, 0xb: WarnUnimpl::VFP_Inst();
341                        default: WarnUnimpl::cdp(); // cdp2
342                    }
343                    0x1: decode LTCOPROC {
344                        0xa, 0xb: WarnUnimpl::Core_to_extension_transfer();
345                        default: decode HTOPCODE_4 {
346                            0x0: WarnUnimpl::mcr(); // mcr2
347                            0x1: WarnUnimpl::mrc(); // mrc2
348                        }
349                    }
350                }
351                0x3: WarnUnimpl::Advanced_SIMD();
352                default: decode LTCOPROC {
353                    0xa, 0xb: decode HTOPCODE_9_4 {
354                        0x00: WarnUnimpl::undefined();
355                        0x04: WarnUnimpl::mcrr(); // mcrr2
356                        0x05: WarnUnimpl::mrrc(); // mrrc2
357                        0x02, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10,
358                        0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e:
359                            WarnUnimpl::stc(); // stc2
360                        0x03, 0x07, 0x09, 0x0b, 0x0d, 0x0f, 0x11,
361                        0x13, 0x15, 0x17, 0x19, 0x1b, 0x1d, 0x1f:
362                            decode HTRN {
363                                0xf: WarnUnimpl::ldc(); // ldc2 (literal)
364                                default: WarnUnimpl::ldc(); // ldc2 (immediate)
365                            }
366                    }
367                    default: decode HTOPCODE_9_5 {
368                        0x00: WarnUnimpl::undefined();
369                        0x02: WarnUnimpl::SIMD_VFP_64_bit_core_extension_transfer();
370                        0x01, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
371                        0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f:
372                            WarnUnimpl::Extension_register_load_store_instruction();
373                    }
374                }
375            }
376        }
377    }
378}
379