decode.hh (9184:a1a8f137b796) decode.hh (9444:ab47fe7f03f0)
1/*
1/*
2 * Copyright (c) 2012 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 *
2 * Copyright (c) 2004-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright

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84
85 /** Per-thread status. */
86 ThreadStatus decodeStatus[Impl::MaxThreads];
87
88 public:
89 /** DefaultDecode constructor. */
90 DefaultDecode(O3CPU *_cpu, DerivO3CPUParams *params);
91
14 * Copyright (c) 2004-2006 The Regents of The University of Michigan
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

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96
97 /** Per-thread status. */
98 ThreadStatus decodeStatus[Impl::MaxThreads];
99
100 public:
101 /** DefaultDecode constructor. */
102 DefaultDecode(O3CPU *_cpu, DerivO3CPUParams *params);
103
104 void startupStage();
105 void resetStage();
106
92 /** Returns the name of decode. */
93 std::string name() const;
94
95 /** Registers statistics. */
96 void regStats();
97
98 /** Sets the main backwards communication time buffer pointer. */
99 void setTimeBuffer(TimeBuffer<TimeStruct> *tb_ptr);
100
101 /** Sets pointer to time buffer used to communicate to the next stage. */
102 void setDecodeQueue(TimeBuffer<DecodeStruct> *dq_ptr);
103
104 /** Sets pointer to time buffer coming from fetch. */
105 void setFetchQueue(TimeBuffer<FetchStruct> *fq_ptr);
106
107 /** Sets pointer to list of active threads. */
108 void setActiveThreads(std::list<ThreadID> *at_ptr);
109
107 /** Returns the name of decode. */
108 std::string name() const;
109
110 /** Registers statistics. */
111 void regStats();
112
113 /** Sets the main backwards communication time buffer pointer. */
114 void setTimeBuffer(TimeBuffer<TimeStruct> *tb_ptr);
115
116 /** Sets pointer to time buffer used to communicate to the next stage. */
117 void setDecodeQueue(TimeBuffer<DecodeStruct> *dq_ptr);
118
119 /** Sets pointer to time buffer coming from fetch. */
120 void setFetchQueue(TimeBuffer<FetchStruct> *fq_ptr);
121
122 /** Sets pointer to list of active threads. */
123 void setActiveThreads(std::list<ThreadID> *at_ptr);
124
110 /** Drains the decode stage. */
111 bool drain();
125 /** Perform sanity checks after a drain. */
126 void drainSanityCheck() const;
112
127
113 /** Resumes execution after a drain. */
114 void resume() { }
128 /** Has the stage drained? */
129 bool isDrained() const { return true; }
115
130
116 /** Switches out the decode stage. */
117 void switchOut() { }
118
119 /** Takes over from another CPU's thread. */
131 /** Takes over from another CPU's thread. */
120 void takeOverFrom();
132 void takeOverFrom() { resetStage(); }
121
122 /** Ticks decode, processing all input signals and decoding as many
123 * instructions as possible.
124 */
125 void tick();
126
127 /** Determines what to do based on decode's current status.
128 * @param status_change decode() sets this variable if there was a status

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263 unsigned toRenameIndex;
264
265 /** number of Active Threads*/
266 ThreadID numThreads;
267
268 /** List of active thread ids */
269 std::list<ThreadID> *activeThreads;
270
133
134 /** Ticks decode, processing all input signals and decoding as many
135 * instructions as possible.
136 */
137 void tick();
138
139 /** Determines what to do based on decode's current status.
140 * @param status_change decode() sets this variable if there was a status

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275 unsigned toRenameIndex;
276
277 /** number of Active Threads*/
278 ThreadID numThreads;
279
280 /** List of active thread ids */
281 std::list<ThreadID> *activeThreads;
282
271 /** Number of branches in flight. */
272 unsigned branchCount[Impl::MaxThreads];
273
274 /** Maximum size of the skid buffer. */
275 unsigned skidBufferMax;
276
277 /** SeqNum of Squashing Branch Delay Instruction (used for MIPS)*/
278 Addr bdelayDoneSeqNum[Impl::MaxThreads];
279
280 /** Instruction used for squashing branch (used for MIPS)*/
281 DynInstPtr squashInst[Impl::MaxThreads];

--- 33 unchanged lines hidden --- 		283 /** Maximum size of the skid buffer. */
284 unsigned skidBufferMax;
285
286 /** SeqNum of Squashing Branch Delay Instruction (used for MIPS)*/
287 Addr bdelayDoneSeqNum[Impl::MaxThreads];
288
289 /** Instruction used for squashing branch (used for MIPS)*/
290 DynInstPtr squashInst[Impl::MaxThreads];

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