mem_dep_unit.hh (3500:8d5e32b3bc2e) mem_dep_unit.hh (5529:9ae69b9cd7fd)
1/*
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;

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43 size_t operator() (const InstSeqNum &seq_num) const {
44 unsigned a = (unsigned)seq_num;
45 unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF;
46
47 return hash;
48 }
49};
50
1/*
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;

--- 34 unchanged lines hidden (view full) ---

43 size_t operator() (const InstSeqNum &seq_num) const {
44 unsigned a = (unsigned)seq_num;
45 unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF;
46
47 return hash;
48 }
49};
50
51class DerivO3CPUParams;
52
51template <class Impl>
52class InstructionQueue;
53
54/**
55 * Memory dependency unit class. This holds the memory dependence predictor.
56 * As memory operations are issued to the IQ, they are also issued to this
57 * unit, which then looks up the prediction as to what they are dependent
58 * upon. This unit must be checked prior to a memory operation being able
59 * to issue. Although this is templated, it's somewhat hard to make a generic
60 * memory dependence unit. This one is mostly for store sets; it will be
61 * quite limited in what other memory dependence predictions it can also
62 * utilize. Thus this class should be most likely be rewritten for other
63 * dependence prediction schemes.
64 */
65template <class MemDepPred, class Impl>
66class MemDepUnit {
67 public:
53template <class Impl>
54class InstructionQueue;
55
56/**
57 * Memory dependency unit class. This holds the memory dependence predictor.
58 * As memory operations are issued to the IQ, they are also issued to this
59 * unit, which then looks up the prediction as to what they are dependent
60 * upon. This unit must be checked prior to a memory operation being able
61 * to issue. Although this is templated, it's somewhat hard to make a generic
62 * memory dependence unit. This one is mostly for store sets; it will be
63 * quite limited in what other memory dependence predictions it can also
64 * utilize. Thus this class should be most likely be rewritten for other
65 * dependence prediction schemes.
66 */
67template <class MemDepPred, class Impl>
68class MemDepUnit {
69 public:
68 typedef typename Impl::Params Params;
69 typedef typename Impl::DynInstPtr DynInstPtr;
70
71 /** Empty constructor. Must call init() prior to using in this case. */
72 MemDepUnit();
73
74 /** Constructs a MemDepUnit with given parameters. */
70 typedef typename Impl::DynInstPtr DynInstPtr;
71
72 /** Empty constructor. Must call init() prior to using in this case. */
73 MemDepUnit();
74
75 /** Constructs a MemDepUnit with given parameters. */
75 MemDepUnit(Params *params);
76 MemDepUnit(DerivO3CPUParams *params);
76
77 /** Frees up any memory allocated. */
78 ~MemDepUnit();
79
80 /** Returns the name of the memory dependence unit. */
81 std::string name() const;
82
83 /** Initializes the unit with parameters and a thread id. */
77
78 /** Frees up any memory allocated. */
79 ~MemDepUnit();
80
81 /** Returns the name of the memory dependence unit. */
82 std::string name() const;
83
84 /** Initializes the unit with parameters and a thread id. */
84 void init(Params *params, int tid);
85 void init(DerivO3CPUParams *params, int tid);
85
86 /** Registers statistics. */
87 void regStats();
88
89 /** Switches out the memory dependence predictor. */
90 void switchOut();
91
92 /** Takes over from another CPU's thread. */

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87 /** Registers statistics. */
88 void regStats();
89
90 /** Switches out the memory dependence predictor. */
91 void switchOut();
92
93 /** Takes over from another CPU's thread. */

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