1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Steve Reinhardt
30 */
31
32#ifndef __CPU_STATIC_INST_HH__
33#define __CPU_STATIC_INST_HH__
34
35#include <bitset>
36#include <string>
37
38#include "arch/registers.hh"
39#include "arch/types.hh"
40#include "base/misc.hh"
41#include "base/refcnt.hh"
42#include "base/types.hh"
43#include "config/the_isa.hh"
44#include "cpu/op_class.hh"
45#include "cpu/reg_class.hh"
| 1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Steve Reinhardt
30 */
31
32#ifndef __CPU_STATIC_INST_HH__
33#define __CPU_STATIC_INST_HH__
34
35#include <bitset>
36#include <string>
37
38#include "arch/registers.hh"
39#include "arch/types.hh"
40#include "base/misc.hh"
41#include "base/refcnt.hh"
42#include "base/types.hh"
43#include "config/the_isa.hh"
44#include "cpu/op_class.hh"
45#include "cpu/reg_class.hh"
|
| 46#include "cpu/reg_class_impl.hh"
|
46#include "cpu/static_inst_fwd.hh"
47#include "cpu/thread_context.hh"
48#include "enums/StaticInstFlags.hh"
49
50// forward declarations
51class Packet;
52
53class ExecContext;
54
55class SymbolTable;
56
57namespace Trace {
58 class InstRecord;
59}
60
61/**
62 * Base, ISA-independent static instruction class.
63 *
64 * The main component of this class is the vector of flags and the
65 * associated methods for reading them. Any object that can rely
66 * solely on these flags can process instructions without being
67 * recompiled for multiple ISAs.
68 */
69class StaticInst : public RefCounted, public StaticInstFlags
70{
71 public:
72 /// Binary extended machine instruction type.
73 typedef TheISA::ExtMachInst ExtMachInst;
74
75 enum {
76 MaxInstSrcRegs = TheISA::MaxInstSrcRegs, //< Max source regs
77 MaxInstDestRegs = TheISA::MaxInstDestRegs //< Max dest regs
78 };
79
80 protected:
81
82 /// Flag values for this instruction.
83 std::bitset<Num_Flags> flags;
84
85 /// See opClass().
86 OpClass _opClass;
87
88 /// See numSrcRegs().
89 int8_t _numSrcRegs;
90
91 /// See numDestRegs().
92 int8_t _numDestRegs;
93
94 /// The following are used to track physical register usage
95 /// for machines with separate int & FP reg files.
96 //@{
97 int8_t _numFPDestRegs;
98 int8_t _numIntDestRegs;
99 int8_t _numCCDestRegs;
100 //@}
101
102 public:
103
104 /// @name Register information.
105 /// The sum of numFPDestRegs() and numIntDestRegs() equals
106 /// numDestRegs(). The former two functions are used to track
107 /// physical register usage for machines with separate int & FP
108 /// reg files.
109 //@{
110 /// Number of source registers.
111 int8_t numSrcRegs() const { return _numSrcRegs; }
112 /// Number of destination registers.
113 int8_t numDestRegs() const { return _numDestRegs; }
114 /// Number of floating-point destination regs.
115 int8_t numFPDestRegs() const { return _numFPDestRegs; }
116 /// Number of integer destination regs.
117 int8_t numIntDestRegs() const { return _numIntDestRegs; }
118 //@}
119 /// Number of coprocesor destination regs.
120 int8_t numCCDestRegs() const { return _numCCDestRegs; }
121 //@}
122
123 /// @name Flag accessors.
124 /// These functions are used to access the values of the various
125 /// instruction property flags. See StaticInst::Flags for descriptions
126 /// of the individual flags.
127 //@{
128
129 bool isNop() const { return flags[IsNop]; }
130
131 bool isMemRef() const { return flags[IsMemRef]; }
132 bool isLoad() const { return flags[IsLoad]; }
133 bool isStore() const { return flags[IsStore]; }
134 bool isStoreConditional() const { return flags[IsStoreConditional]; }
135 bool isInstPrefetch() const { return flags[IsInstPrefetch]; }
136 bool isDataPrefetch() const { return flags[IsDataPrefetch]; }
137 bool isPrefetch() const { return isInstPrefetch() ||
138 isDataPrefetch(); }
139
140 bool isInteger() const { return flags[IsInteger]; }
141 bool isFloating() const { return flags[IsFloating]; }
142 bool isCC() const { return flags[IsCC]; }
143
144 bool isControl() const { return flags[IsControl]; }
145 bool isCall() const { return flags[IsCall]; }
146 bool isReturn() const { return flags[IsReturn]; }
147 bool isDirectCtrl() const { return flags[IsDirectControl]; }
148 bool isIndirectCtrl() const { return flags[IsIndirectControl]; }
149 bool isCondCtrl() const { return flags[IsCondControl]; }
150 bool isUncondCtrl() const { return flags[IsUncondControl]; }
151 bool isCondDelaySlot() const { return flags[IsCondDelaySlot]; }
152
153 bool isThreadSync() const { return flags[IsThreadSync]; }
154 bool isSerializing() const { return flags[IsSerializing] ||
155 flags[IsSerializeBefore] ||
156 flags[IsSerializeAfter]; }
157 bool isSerializeBefore() const { return flags[IsSerializeBefore]; }
158 bool isSerializeAfter() const { return flags[IsSerializeAfter]; }
159 bool isSquashAfter() const { return flags[IsSquashAfter]; }
160 bool isMemBarrier() const { return flags[IsMemBarrier]; }
161 bool isWriteBarrier() const { return flags[IsWriteBarrier]; }
162 bool isNonSpeculative() const { return flags[IsNonSpeculative]; }
163 bool isQuiesce() const { return flags[IsQuiesce]; }
164 bool isIprAccess() const { return flags[IsIprAccess]; }
165 bool isUnverifiable() const { return flags[IsUnverifiable]; }
166 bool isSyscall() const { return flags[IsSyscall]; }
167 bool isMacroop() const { return flags[IsMacroop]; }
168 bool isMicroop() const { return flags[IsMicroop]; }
169 bool isDelayedCommit() const { return flags[IsDelayedCommit]; }
170 bool isLastMicroop() const { return flags[IsLastMicroop]; }
171 bool isFirstMicroop() const { return flags[IsFirstMicroop]; }
172 //This flag doesn't do anything yet
173 bool isMicroBranch() const { return flags[IsMicroBranch]; }
174 //@}
175
176 void setFirstMicroop() { flags[IsFirstMicroop] = true; }
177 void setLastMicroop() { flags[IsLastMicroop] = true; }
178 void setDelayedCommit() { flags[IsDelayedCommit] = true; }
179 void setFlag(Flags f) { flags[f] = true; }
180
181 /// Operation class. Used to select appropriate function unit in issue.
182 OpClass opClass() const { return _opClass; }
183
184
185 /// Return logical index (architectural reg num) of i'th destination reg.
186 /// Only the entries from 0 through numDestRegs()-1 are valid.
| 47#include "cpu/static_inst_fwd.hh"
48#include "cpu/thread_context.hh"
49#include "enums/StaticInstFlags.hh"
50
51// forward declarations
52class Packet;
53
54class ExecContext;
55
56class SymbolTable;
57
58namespace Trace {
59 class InstRecord;
60}
61
62/**
63 * Base, ISA-independent static instruction class.
64 *
65 * The main component of this class is the vector of flags and the
66 * associated methods for reading them. Any object that can rely
67 * solely on these flags can process instructions without being
68 * recompiled for multiple ISAs.
69 */
70class StaticInst : public RefCounted, public StaticInstFlags
71{
72 public:
73 /// Binary extended machine instruction type.
74 typedef TheISA::ExtMachInst ExtMachInst;
75
76 enum {
77 MaxInstSrcRegs = TheISA::MaxInstSrcRegs, //< Max source regs
78 MaxInstDestRegs = TheISA::MaxInstDestRegs //< Max dest regs
79 };
80
81 protected:
82
83 /// Flag values for this instruction.
84 std::bitset<Num_Flags> flags;
85
86 /// See opClass().
87 OpClass _opClass;
88
89 /// See numSrcRegs().
90 int8_t _numSrcRegs;
91
92 /// See numDestRegs().
93 int8_t _numDestRegs;
94
95 /// The following are used to track physical register usage
96 /// for machines with separate int & FP reg files.
97 //@{
98 int8_t _numFPDestRegs;
99 int8_t _numIntDestRegs;
100 int8_t _numCCDestRegs;
101 //@}
102
103 public:
104
105 /// @name Register information.
106 /// The sum of numFPDestRegs() and numIntDestRegs() equals
107 /// numDestRegs(). The former two functions are used to track
108 /// physical register usage for machines with separate int & FP
109 /// reg files.
110 //@{
111 /// Number of source registers.
112 int8_t numSrcRegs() const { return _numSrcRegs; }
113 /// Number of destination registers.
114 int8_t numDestRegs() const { return _numDestRegs; }
115 /// Number of floating-point destination regs.
116 int8_t numFPDestRegs() const { return _numFPDestRegs; }
117 /// Number of integer destination regs.
118 int8_t numIntDestRegs() const { return _numIntDestRegs; }
119 //@}
120 /// Number of coprocesor destination regs.
121 int8_t numCCDestRegs() const { return _numCCDestRegs; }
122 //@}
123
124 /// @name Flag accessors.
125 /// These functions are used to access the values of the various
126 /// instruction property flags. See StaticInst::Flags for descriptions
127 /// of the individual flags.
128 //@{
129
130 bool isNop() const { return flags[IsNop]; }
131
132 bool isMemRef() const { return flags[IsMemRef]; }
133 bool isLoad() const { return flags[IsLoad]; }
134 bool isStore() const { return flags[IsStore]; }
135 bool isStoreConditional() const { return flags[IsStoreConditional]; }
136 bool isInstPrefetch() const { return flags[IsInstPrefetch]; }
137 bool isDataPrefetch() const { return flags[IsDataPrefetch]; }
138 bool isPrefetch() const { return isInstPrefetch() ||
139 isDataPrefetch(); }
140
141 bool isInteger() const { return flags[IsInteger]; }
142 bool isFloating() const { return flags[IsFloating]; }
143 bool isCC() const { return flags[IsCC]; }
144
145 bool isControl() const { return flags[IsControl]; }
146 bool isCall() const { return flags[IsCall]; }
147 bool isReturn() const { return flags[IsReturn]; }
148 bool isDirectCtrl() const { return flags[IsDirectControl]; }
149 bool isIndirectCtrl() const { return flags[IsIndirectControl]; }
150 bool isCondCtrl() const { return flags[IsCondControl]; }
151 bool isUncondCtrl() const { return flags[IsUncondControl]; }
152 bool isCondDelaySlot() const { return flags[IsCondDelaySlot]; }
153
154 bool isThreadSync() const { return flags[IsThreadSync]; }
155 bool isSerializing() const { return flags[IsSerializing] ||
156 flags[IsSerializeBefore] ||
157 flags[IsSerializeAfter]; }
158 bool isSerializeBefore() const { return flags[IsSerializeBefore]; }
159 bool isSerializeAfter() const { return flags[IsSerializeAfter]; }
160 bool isSquashAfter() const { return flags[IsSquashAfter]; }
161 bool isMemBarrier() const { return flags[IsMemBarrier]; }
162 bool isWriteBarrier() const { return flags[IsWriteBarrier]; }
163 bool isNonSpeculative() const { return flags[IsNonSpeculative]; }
164 bool isQuiesce() const { return flags[IsQuiesce]; }
165 bool isIprAccess() const { return flags[IsIprAccess]; }
166 bool isUnverifiable() const { return flags[IsUnverifiable]; }
167 bool isSyscall() const { return flags[IsSyscall]; }
168 bool isMacroop() const { return flags[IsMacroop]; }
169 bool isMicroop() const { return flags[IsMicroop]; }
170 bool isDelayedCommit() const { return flags[IsDelayedCommit]; }
171 bool isLastMicroop() const { return flags[IsLastMicroop]; }
172 bool isFirstMicroop() const { return flags[IsFirstMicroop]; }
173 //This flag doesn't do anything yet
174 bool isMicroBranch() const { return flags[IsMicroBranch]; }
175 //@}
176
177 void setFirstMicroop() { flags[IsFirstMicroop] = true; }
178 void setLastMicroop() { flags[IsLastMicroop] = true; }
179 void setDelayedCommit() { flags[IsDelayedCommit] = true; }
180 void setFlag(Flags f) { flags[f] = true; }
181
182 /// Operation class. Used to select appropriate function unit in issue.
183 OpClass opClass() const { return _opClass; }
184
185
186 /// Return logical index (architectural reg num) of i'th destination reg.
187 /// Only the entries from 0 through numDestRegs()-1 are valid.
|
187 RegId destRegIdx(int i) const { return _destRegIdx[i]; }
| 188 const RegId& destRegIdx(int i) const { return _destRegIdx[i]; }
|
188
189 /// Return logical index (architectural reg num) of i'th source reg.
190 /// Only the entries from 0 through numSrcRegs()-1 are valid.
| 189
190 /// Return logical index (architectural reg num) of i'th source reg.
191 /// Only the entries from 0 through numSrcRegs()-1 are valid.
|
191 RegId srcRegIdx(int i) const { return _srcRegIdx[i]; }
| 192 const RegId& srcRegIdx(int i) const { return _srcRegIdx[i]; }
|
192
193 /// Pointer to a statically allocated "null" instruction object.
194 /// Used to give eaCompInst() and memAccInst() something to return
195 /// when called on non-memory instructions.
196 static StaticInstPtr nullStaticInstPtr;
197
198 /**
199 * Memory references only: returns "fake" instruction representing
200 * the effective address part of the memory operation. Used to
201 * obtain the dependence info (numSrcRegs and srcRegIdx[]) for
202 * just the EA computation.
203 */
204 virtual const
205 StaticInstPtr &eaCompInst() const { return nullStaticInstPtr; }
206
207 /**
208 * Memory references only: returns "fake" instruction representing
209 * the memory access part of the memory operation. Used to
210 * obtain the dependence info (numSrcRegs and srcRegIdx[]) for
211 * just the memory access (not the EA computation).
212 */
213 virtual const
214 StaticInstPtr &memAccInst() const { return nullStaticInstPtr; }
215
216 /// The binary machine instruction.
217 const ExtMachInst machInst;
218
219 protected:
220
221 /// See destRegIdx().
222 RegId _destRegIdx[MaxInstDestRegs];
223 /// See srcRegIdx().
224 RegId _srcRegIdx[MaxInstSrcRegs];
225
226 /**
227 * Base mnemonic (e.g., "add"). Used by generateDisassembly()
228 * methods. Also useful to readily identify instructions from
229 * within the debugger when #cachedDisassembly has not been
230 * initialized.
231 */
232 const char *mnemonic;
233
234 /**
235 * String representation of disassembly (lazily evaluated via
236 * disassemble()).
237 */
238 mutable std::string *cachedDisassembly;
239
240 /**
241 * Internal function to generate disassembly string.
242 */
243 virtual std::string
244 generateDisassembly(Addr pc, const SymbolTable *symtab) const = 0;
245
246 /// Constructor.
247 /// It's important to initialize everything here to a sane
248 /// default, since the decoder generally only overrides
249 /// the fields that are meaningful for the particular
250 /// instruction.
251 StaticInst(const char *_mnemonic, ExtMachInst _machInst, OpClass __opClass)
252 : _opClass(__opClass), _numSrcRegs(0), _numDestRegs(0),
253 _numFPDestRegs(0), _numIntDestRegs(0), _numCCDestRegs(0),
254 machInst(_machInst), mnemonic(_mnemonic), cachedDisassembly(0)
255 { }
256
257 public:
258 virtual ~StaticInst();
259
260 virtual Fault execute(ExecContext *xc,
261 Trace::InstRecord *traceData) const = 0;
262 virtual Fault eaComp(ExecContext *xc,
263 Trace::InstRecord *traceData) const
264 {
265 panic("eaComp not defined!");
266 }
267
268 virtual Fault initiateAcc(ExecContext *xc,
269 Trace::InstRecord *traceData) const
270 {
271 panic("initiateAcc not defined!");
272 }
273
274 virtual Fault completeAcc(Packet *pkt, ExecContext *xc,
275 Trace::InstRecord *traceData) const
276 {
277 panic("completeAcc not defined!");
278 }
279
280 virtual void advancePC(TheISA::PCState &pcState) const = 0;
281
282 /**
283 * Return the microop that goes with a particular micropc. This should
284 * only be defined/used in macroops which will contain microops
285 */
286 virtual StaticInstPtr fetchMicroop(MicroPC upc) const;
287
288 /**
289 * Return the target address for a PC-relative branch.
290 * Invalid if not a PC-relative branch (i.e. isDirectCtrl()
291 * should be true).
292 */
293 virtual TheISA::PCState branchTarget(const TheISA::PCState &pc) const;
294
295 /**
296 * Return the target address for an indirect branch (jump). The
297 * register value is read from the supplied thread context, so
298 * the result is valid only if the thread context is about to
299 * execute the branch in question. Invalid if not an indirect
300 * branch (i.e. isIndirectCtrl() should be true).
301 */
302 virtual TheISA::PCState branchTarget(ThreadContext *tc) const;
303
304 /**
305 * Return true if the instruction is a control transfer, and if so,
306 * return the target address as well.
307 */
308 bool hasBranchTarget(const TheISA::PCState &pc, ThreadContext *tc,
309 TheISA::PCState &tgt) const;
310
311 /**
312 * Return string representation of disassembled instruction.
313 * The default version of this function will call the internal
314 * virtual generateDisassembly() function to get the string,
315 * then cache it in #cachedDisassembly. If the disassembly
316 * should not be cached, this function should be overridden directly.
317 */
318 virtual const std::string &disassemble(Addr pc,
319 const SymbolTable *symtab = 0) const;
320
321 /**
322 * Print a separator separated list of this instruction's set flag
323 * names on the given stream.
324 */
325 void printFlags(std::ostream &outs, const std::string &separator) const;
326
327 /// Return name of machine instruction
328 std::string getName() { return mnemonic; }
329};
330
331#endif // __CPU_STATIC_INST_HH__
| 193
194 /// Pointer to a statically allocated "null" instruction object.
195 /// Used to give eaCompInst() and memAccInst() something to return
196 /// when called on non-memory instructions.
197 static StaticInstPtr nullStaticInstPtr;
198
199 /**
200 * Memory references only: returns "fake" instruction representing
201 * the effective address part of the memory operation. Used to
202 * obtain the dependence info (numSrcRegs and srcRegIdx[]) for
203 * just the EA computation.
204 */
205 virtual const
206 StaticInstPtr &eaCompInst() const { return nullStaticInstPtr; }
207
208 /**
209 * Memory references only: returns "fake" instruction representing
210 * the memory access part of the memory operation. Used to
211 * obtain the dependence info (numSrcRegs and srcRegIdx[]) for
212 * just the memory access (not the EA computation).
213 */
214 virtual const
215 StaticInstPtr &memAccInst() const { return nullStaticInstPtr; }
216
217 /// The binary machine instruction.
218 const ExtMachInst machInst;
219
220 protected:
221
222 /// See destRegIdx().
223 RegId _destRegIdx[MaxInstDestRegs];
224 /// See srcRegIdx().
225 RegId _srcRegIdx[MaxInstSrcRegs];
226
227 /**
228 * Base mnemonic (e.g., "add"). Used by generateDisassembly()
229 * methods. Also useful to readily identify instructions from
230 * within the debugger when #cachedDisassembly has not been
231 * initialized.
232 */
233 const char *mnemonic;
234
235 /**
236 * String representation of disassembly (lazily evaluated via
237 * disassemble()).
238 */
239 mutable std::string *cachedDisassembly;
240
241 /**
242 * Internal function to generate disassembly string.
243 */
244 virtual std::string
245 generateDisassembly(Addr pc, const SymbolTable *symtab) const = 0;
246
247 /// Constructor.
248 /// It's important to initialize everything here to a sane
249 /// default, since the decoder generally only overrides
250 /// the fields that are meaningful for the particular
251 /// instruction.
252 StaticInst(const char *_mnemonic, ExtMachInst _machInst, OpClass __opClass)
253 : _opClass(__opClass), _numSrcRegs(0), _numDestRegs(0),
254 _numFPDestRegs(0), _numIntDestRegs(0), _numCCDestRegs(0),
255 machInst(_machInst), mnemonic(_mnemonic), cachedDisassembly(0)
256 { }
257
258 public:
259 virtual ~StaticInst();
260
261 virtual Fault execute(ExecContext *xc,
262 Trace::InstRecord *traceData) const = 0;
263 virtual Fault eaComp(ExecContext *xc,
264 Trace::InstRecord *traceData) const
265 {
266 panic("eaComp not defined!");
267 }
268
269 virtual Fault initiateAcc(ExecContext *xc,
270 Trace::InstRecord *traceData) const
271 {
272 panic("initiateAcc not defined!");
273 }
274
275 virtual Fault completeAcc(Packet *pkt, ExecContext *xc,
276 Trace::InstRecord *traceData) const
277 {
278 panic("completeAcc not defined!");
279 }
280
281 virtual void advancePC(TheISA::PCState &pcState) const = 0;
282
283 /**
284 * Return the microop that goes with a particular micropc. This should
285 * only be defined/used in macroops which will contain microops
286 */
287 virtual StaticInstPtr fetchMicroop(MicroPC upc) const;
288
289 /**
290 * Return the target address for a PC-relative branch.
291 * Invalid if not a PC-relative branch (i.e. isDirectCtrl()
292 * should be true).
293 */
294 virtual TheISA::PCState branchTarget(const TheISA::PCState &pc) const;
295
296 /**
297 * Return the target address for an indirect branch (jump). The
298 * register value is read from the supplied thread context, so
299 * the result is valid only if the thread context is about to
300 * execute the branch in question. Invalid if not an indirect
301 * branch (i.e. isIndirectCtrl() should be true).
302 */
303 virtual TheISA::PCState branchTarget(ThreadContext *tc) const;
304
305 /**
306 * Return true if the instruction is a control transfer, and if so,
307 * return the target address as well.
308 */
309 bool hasBranchTarget(const TheISA::PCState &pc, ThreadContext *tc,
310 TheISA::PCState &tgt) const;
311
312 /**
313 * Return string representation of disassembled instruction.
314 * The default version of this function will call the internal
315 * virtual generateDisassembly() function to get the string,
316 * then cache it in #cachedDisassembly. If the disassembly
317 * should not be cached, this function should be overridden directly.
318 */
319 virtual const std::string &disassemble(Addr pc,
320 const SymbolTable *symtab = 0) const;
321
322 /**
323 * Print a separator separated list of this instruction's set flag
324 * names on the given stream.
325 */
326 void printFlags(std::ostream &outs, const std::string &separator) const;
327
328 /// Return name of machine instruction
329 std::string getName() { return mnemonic; }
330};
331
332#endif // __CPU_STATIC_INST_HH__
|