macromem.hh revision 12616 
1/*
2 * Copyright (c) 2010-2014 ARM Limited
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 * Copyright (c) 2007-2008 The Florida State University
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Stephen Hines
41 */
42#ifndef __ARCH_ARM_MACROMEM_HH__
43#define __ARCH_ARM_MACROMEM_HH__
44
45#include "arch/arm/insts/pred_inst.hh"
46#include "arch/arm/tlb.hh"
47
48namespace ArmISA
49{
50
51static inline unsigned int
52number_of_ones(int32_t val)
53{
54    uint32_t ones = 0;
55    for (int i = 0; i < 32; i++ )
56    {
57        if ( val & (1<<i) )
58            ones++;
59    }
60    return ones;
61}
62
63/**
64 * Base class for Memory microops
65 */
66class MicroOp : public PredOp
67{
68  protected:
69    MicroOp(const char *mnem, ExtMachInst machInst, OpClass __opClass)
70            : PredOp(mnem, machInst, __opClass)
71    {
72    }
73
74  public:
75    void
76    advancePC(PCState &pcState) const override
77    {
78        if (flags[IsLastMicroop]) {
79            pcState.uEnd();
80        } else if (flags[IsMicroop]) {
81            pcState.uAdvance();
82        } else {
83            pcState.advance();
84        }
85    }
86};
87
88class MicroOpX : public ArmStaticInst
89{
90  protected:
91    MicroOpX(const char *mnem, ExtMachInst machInst, OpClass __opClass)
92            : ArmStaticInst(mnem, machInst, __opClass)
93    {}
94
95  public:
96    void
97    advancePC(PCState &pcState) const override
98    {
99        if (flags[IsLastMicroop]) {
100            pcState.uEnd();
101        } else if (flags[IsMicroop]) {
102            pcState.uAdvance();
103        } else {
104            pcState.advance();
105        }
106    }
107};
108
109/**
110 * Microops for Neon loads/stores
111 */
112class MicroNeonMemOp : public MicroOp
113{
114  protected:
115    RegIndex dest, ura;
116    uint32_t imm;
117    unsigned memAccessFlags;
118
119    MicroNeonMemOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
120                   RegIndex _dest, RegIndex _ura, uint32_t _imm)
121            : MicroOp(mnem, machInst, __opClass),
122              dest(_dest), ura(_ura), imm(_imm),
123              memAccessFlags(TLB::MustBeOne)
124    {
125    }
126};
127
128/**
129 * Microops for Neon load/store (de)interleaving
130 */
131class MicroNeonMixOp : public MicroOp
132{
133  protected:
134    RegIndex dest, op1;
135    uint32_t step;
136
137    MicroNeonMixOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
138                   RegIndex _dest, RegIndex _op1, uint32_t _step)
139            : MicroOp(mnem, machInst, __opClass),
140              dest(_dest), op1(_op1), step(_step)
141    {
142    }
143};
144
145class MicroNeonMixLaneOp : public MicroNeonMixOp
146{
147  protected:
148    unsigned lane;
149
150    MicroNeonMixLaneOp(const char *mnem, ExtMachInst machInst,
151                       OpClass __opClass, RegIndex _dest, RegIndex _op1,
152                       uint32_t _step, unsigned _lane)
153            : MicroNeonMixOp(mnem, machInst, __opClass, _dest, _op1, _step),
154              lane(_lane)
155    {
156    }
157};
158
159/**
160 * Microops for AArch64 NEON load/store (de)interleaving
161 */
162class MicroNeonMixOp64 : public MicroOp
163{
164  protected:
165    RegIndex dest, op1;
166    uint8_t eSize, dataSize, numStructElems, numRegs, step;
167
168    MicroNeonMixOp64(const char *mnem, ExtMachInst machInst, OpClass __opClass,
169                     RegIndex _dest, RegIndex _op1, uint8_t _eSize,
170                     uint8_t _dataSize, uint8_t _numStructElems,
171                     uint8_t _numRegs, uint8_t _step)
172        : MicroOp(mnem, machInst, __opClass), dest(_dest), op1(_op1),
173          eSize(_eSize), dataSize(_dataSize), numStructElems(_numStructElems),
174          numRegs(_numRegs), step(_step)
175    {
176    }
177};
178
179class MicroNeonMixLaneOp64 : public MicroOp
180{
181  protected:
182    RegIndex dest, op1;
183    uint8_t eSize, dataSize, numStructElems, lane, step;
184    bool replicate;
185
186    MicroNeonMixLaneOp64(const char *mnem, ExtMachInst machInst,
187                         OpClass __opClass, RegIndex _dest, RegIndex _op1,
188                         uint8_t _eSize, uint8_t _dataSize,
189                         uint8_t _numStructElems, uint8_t _lane, uint8_t _step,
190                         bool _replicate = false)
191        : MicroOp(mnem, machInst, __opClass), dest(_dest), op1(_op1),
192          eSize(_eSize), dataSize(_dataSize), numStructElems(_numStructElems),
193          lane(_lane), step(_step), replicate(_replicate)
194    {
195    }
196};
197
198/**
199 * Base classes for microcoded AArch64 NEON memory instructions.
200 */
201class VldMultOp64 : public PredMacroOp
202{
203  protected:
204    uint8_t eSize, dataSize, numStructElems, numRegs;
205    bool wb;
206
207    VldMultOp64(const char *mnem, ExtMachInst machInst, OpClass __opClass,
208                RegIndex rn, RegIndex vd, RegIndex rm, uint8_t eSize,
209                uint8_t dataSize, uint8_t numStructElems, uint8_t numRegs,
210                bool wb);
211};
212
213class VstMultOp64 : public PredMacroOp
214{
215  protected:
216    uint8_t eSize, dataSize, numStructElems, numRegs;
217    bool wb;
218
219    VstMultOp64(const char *mnem, ExtMachInst machInst, OpClass __opClass,
220                RegIndex rn, RegIndex vd, RegIndex rm, uint8_t eSize,
221                uint8_t dataSize, uint8_t numStructElems, uint8_t numRegs,
222                bool wb);
223};
224
225class VldSingleOp64 : public PredMacroOp
226{
227  protected:
228    uint8_t eSize, dataSize, numStructElems, index;
229    bool wb, replicate;
230
231    VldSingleOp64(const char *mnem, ExtMachInst machInst, OpClass __opClass,
232                  RegIndex rn, RegIndex vd, RegIndex rm, uint8_t eSize,
233                  uint8_t dataSize, uint8_t numStructElems, uint8_t index,
234                  bool wb, bool replicate = false);
235};
236
237class VstSingleOp64 : public PredMacroOp
238{
239  protected:
240    uint8_t eSize, dataSize, numStructElems, index;
241    bool wb, replicate;
242
243    VstSingleOp64(const char *mnem, ExtMachInst machInst, OpClass __opClass,
244                  RegIndex rn, RegIndex vd, RegIndex rm, uint8_t eSize,
245                  uint8_t dataSize, uint8_t numStructElems, uint8_t index,
246                  bool wb, bool replicate = false);
247};
248
249/**
250 * Microops of the form
251 * PC   = IntRegA
252 * CPSR = IntRegB
253 */
254class MicroSetPCCPSR : public MicroOp
255{
256    protected:
257    IntRegIndex ura, urb, urc;
258
259    MicroSetPCCPSR(const char *mnem, ExtMachInst machInst, OpClass __opClass,
260                   IntRegIndex _ura, IntRegIndex _urb, IntRegIndex _urc)
261        : MicroOp(mnem, machInst, __opClass),
262          ura(_ura), urb(_urb), urc(_urc)
263    {
264    }
265
266    std::string generateDisassembly(
267            Addr pc, const SymbolTable *symtab) const override;
268};
269
270/**
271 * Microops of the form IntRegA = IntRegB
272 */
273class MicroIntMov : public MicroOp
274{
275  protected:
276    RegIndex ura, urb;
277
278    MicroIntMov(const char *mnem, ExtMachInst machInst, OpClass __opClass,
279               RegIndex _ura, RegIndex _urb)
280            : MicroOp(mnem, machInst, __opClass),
281              ura(_ura), urb(_urb)
282    {
283    }
284
285    std::string generateDisassembly(
286            Addr pc, const SymbolTable *symtab) const override;
287};
288
289/**
290 * Microops of the form IntRegA = IntRegB op Imm
291 */
292class MicroIntImmOp : public MicroOp
293{
294  protected:
295    RegIndex ura, urb;
296    int32_t imm;
297
298    MicroIntImmOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
299                  RegIndex _ura, RegIndex _urb, int32_t _imm)
300            : MicroOp(mnem, machInst, __opClass),
301              ura(_ura), urb(_urb), imm(_imm)
302    {
303    }
304
305    std::string generateDisassembly(
306            Addr pc, const SymbolTable *symtab) const override;
307};
308
309class MicroIntImmXOp : public MicroOpX
310{
311  protected:
312    RegIndex ura, urb;
313    int64_t imm;
314
315    MicroIntImmXOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
316                   RegIndex _ura, RegIndex _urb, int64_t _imm)
317            : MicroOpX(mnem, machInst, __opClass),
318              ura(_ura), urb(_urb), imm(_imm)
319    {
320    }
321
322    std::string generateDisassembly(
323            Addr pc, const SymbolTable *symtab) const override;
324};
325
326/**
327 * Microops of the form IntRegA = IntRegB op IntRegC
328 */
329class MicroIntOp : public MicroOp
330{
331  protected:
332    RegIndex ura, urb, urc;
333
334    MicroIntOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
335               RegIndex _ura, RegIndex _urb, RegIndex _urc)
336            : MicroOp(mnem, machInst, __opClass),
337              ura(_ura), urb(_urb), urc(_urc)
338    {
339    }
340
341    std::string generateDisassembly(
342            Addr pc, const SymbolTable *symtab) const override;
343};
344
345class MicroIntRegXOp : public MicroOp
346{
347  protected:
348    RegIndex ura, urb, urc;
349    ArmExtendType type;
350    uint32_t shiftAmt;
351
352    MicroIntRegXOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
353                   RegIndex _ura, RegIndex _urb, RegIndex _urc,
354                   ArmExtendType _type, uint32_t _shiftAmt)
355            : MicroOp(mnem, machInst, __opClass),
356              ura(_ura), urb(_urb), urc(_urc),
357              type(_type), shiftAmt(_shiftAmt)
358    {
359    }
360
361    std::string generateDisassembly(
362            Addr pc, const SymbolTable *symtab) const override;
363};
364
365/**
366 * Microops of the form IntRegA = IntRegB op shifted IntRegC
367 */
368class MicroIntRegOp : public MicroOp
369{
370  protected:
371    RegIndex ura, urb, urc;
372    int32_t shiftAmt;
373    ArmShiftType shiftType;
374
375    MicroIntRegOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
376               RegIndex _ura, RegIndex _urb, RegIndex _urc,
377               int32_t _shiftAmt, ArmShiftType _shiftType)
378            : MicroOp(mnem, machInst, __opClass),
379              ura(_ura), urb(_urb), urc(_urc),
380              shiftAmt(_shiftAmt), shiftType(_shiftType)
381    {
382    }
383};
384
385/**
386 * Memory microops which use IntReg + Imm addressing
387 */
388class MicroMemOp : public MicroIntImmOp
389{
390  protected:
391    bool up;
392    unsigned memAccessFlags;
393
394    MicroMemOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
395               RegIndex _ura, RegIndex _urb, bool _up, uint8_t _imm)
396            : MicroIntImmOp(mnem, machInst, __opClass, _ura, _urb, _imm),
397              up(_up), memAccessFlags(TLB::MustBeOne | TLB::AlignWord)
398    {
399    }
400
401    std::string generateDisassembly(
402            Addr pc, const SymbolTable *symtab) const override;
403};
404
405class MicroMemPairOp : public MicroOp
406{
407  protected:
408    RegIndex dest, dest2, urb;
409    bool up;
410    int32_t imm;
411    unsigned memAccessFlags;
412
413    MicroMemPairOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
414            RegIndex _dreg1, RegIndex _dreg2, RegIndex _base,
415            bool _up, uint8_t _imm)
416        : MicroOp(mnem, machInst, __opClass),
417        dest(_dreg1), dest2(_dreg2), urb(_base), up(_up), imm(_imm),
418        memAccessFlags(TLB::MustBeOne | TLB::AlignWord)
419    {
420    }
421
422    std::string generateDisassembly(
423            Addr pc, const SymbolTable *symtab) const override;
424};
425
426/**
427 * Base class for microcoded integer memory instructions.
428 */
429class MacroMemOp : public PredMacroOp
430{
431  protected:
432    MacroMemOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
433               IntRegIndex rn, bool index, bool up, bool user,
434               bool writeback, bool load, uint32_t reglist);
435};
436
437/**
438 * Base class for pair load/store instructions.
439 */
440class PairMemOp : public PredMacroOp
441{
442  public:
443    enum AddrMode {
444        AddrMd_Offset,
445        AddrMd_PreIndex,
446        AddrMd_PostIndex
447    };
448
449  protected:
450    PairMemOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
451              uint32_t size, bool fp, bool load, bool noAlloc, bool signExt,
452              bool exclusive, bool acrel, int64_t imm, AddrMode mode,
453              IntRegIndex rn, IntRegIndex rt, IntRegIndex rt2);
454};
455
456class BigFpMemImmOp : public PredMacroOp
457{
458  protected:
459    BigFpMemImmOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
460                  bool load, IntRegIndex dest, IntRegIndex base, int64_t imm);
461};
462
463class BigFpMemPostOp : public PredMacroOp
464{
465  protected:
466    BigFpMemPostOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
467                   bool load, IntRegIndex dest, IntRegIndex base, int64_t imm);
468};
469
470class BigFpMemPreOp : public PredMacroOp
471{
472  protected:
473    BigFpMemPreOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
474                  bool load, IntRegIndex dest, IntRegIndex base, int64_t imm);
475};
476
477class BigFpMemRegOp : public PredMacroOp
478{
479  protected:
480    BigFpMemRegOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
481                  bool load, IntRegIndex dest, IntRegIndex base,
482                  IntRegIndex offset, ArmExtendType type, int64_t imm);
483};
484
485class BigFpMemLitOp : public PredMacroOp
486{
487  protected:
488    BigFpMemLitOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
489                  IntRegIndex dest, int64_t imm);
490};
491
492/**
493 * Base classes for microcoded integer memory instructions.
494 */
495class VldMultOp : public PredMacroOp
496{
497  protected:
498    VldMultOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
499              unsigned elems, RegIndex rn, RegIndex vd, unsigned regs,
500              unsigned inc, uint32_t size, uint32_t align, RegIndex rm);
501};
502
503class VldSingleOp : public PredMacroOp
504{
505  protected:
506    VldSingleOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
507                bool all, unsigned elems, RegIndex rn, RegIndex vd,
508                unsigned regs, unsigned inc, uint32_t size,
509                uint32_t align, RegIndex rm, unsigned lane);
510};
511
512/**
513 * Base class for microcoded integer memory instructions.
514 */
515class VstMultOp : public PredMacroOp
516{
517  protected:
518    VstMultOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
519              unsigned width, RegIndex rn, RegIndex vd, unsigned regs,
520              unsigned inc, uint32_t size, uint32_t align, RegIndex rm);
521};
522
523class VstSingleOp : public PredMacroOp
524{
525  protected:
526    VstSingleOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
527                bool all, unsigned elems, RegIndex rn, RegIndex vd,
528                unsigned regs, unsigned inc, uint32_t size,
529                uint32_t align, RegIndex rm, unsigned lane);
530};
531
532/**
533 * Base class for microcoded floating point memory instructions.
534 */
535class MacroVFPMemOp : public PredMacroOp
536{
537  protected:
538    MacroVFPMemOp(const char *mnem, ExtMachInst machInst, OpClass __opClass,
539                  IntRegIndex rn, RegIndex vd, bool single, bool up,
540                  bool writeback, bool load, uint32_t offset);
541};
542
543}
544
545#endif //__ARCH_ARM_INSTS_MACROMEM_HH__
546