1 | #ifndef morpheo_behavioural_core_multi_ooo_engine_ooo_engine_rename_unit_register_translation_unit_stat_list_unit_Types_h |
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2 | #define morpheo_behavioural_core_multi_ooo_engine_ooo_engine_rename_unit_register_translation_unit_stat_list_unit_Types_h |
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3 | |
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4 | /* |
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5 | * $Id: Types.h 123 2009-06-08 20:43:30Z rosiere $ |
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6 | * |
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7 | * [ Description ] |
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8 | * |
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9 | */ |
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10 | |
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11 | #include "Behavioural/include/Types.h" |
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12 | |
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13 | namespace morpheo { |
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14 | namespace behavioural { |
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15 | |
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16 | namespace core { |
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17 | namespace multi_ooo_engine { |
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18 | namespace ooo_engine { |
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19 | namespace rename_unit { |
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20 | namespace register_translation_unit { |
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21 | namespace stat_list_unit { |
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22 | |
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23 | class stat_list_entry_t |
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24 | { |
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25 | public : bool _is_free ; // set = is present in free list |
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26 | public : bool _is_link ; // set = is present in rat |
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27 | public : bool _is_use ; // set = is present in ROB (used by an instruction as destination) |
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28 | // not necesseray in single thread mode : because an thread can't rename when they have an event |
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29 | // in multi thread, the renaming continue and an old register can be reused |
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30 | |
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31 | public : stat_list_entry_t (void) {}; |
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32 | public : ~stat_list_entry_t (void) {}; |
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33 | |
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34 | public : void reset (bool is_link) |
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35 | { |
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36 | _is_free = 0; |
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37 | _is_link = is_link; |
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38 | _is_use = is_link; |
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39 | } |
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40 | |
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41 | public : void insert_write_old (void) |
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42 | { |
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43 | // old is not in the rat, but is already used (if miss prediction or event) |
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44 | _is_link = 0; |
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45 | } |
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46 | |
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47 | public : void insert_write_new (void) |
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48 | { |
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49 | _is_free = 0; |
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50 | _is_link = 1; |
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51 | _is_use = 1; |
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52 | } |
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53 | |
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54 | public : void retire_write_old (bool restore, bool restore_old) |
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55 | { |
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56 | // restore restore_old is_link |
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57 | // 0 x 0 - normal case : unallocate |
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58 | // 1 0 0 - event and previous update |
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59 | // 1 1 1 - event and first update |
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60 | |
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61 | if (restore and restore_old) |
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62 | { |
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63 | _is_link = 1; |
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64 | // _is_use = 1; // already set |
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65 | } |
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66 | else |
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67 | { |
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68 | _is_link = 0; |
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69 | _is_use = 0; |
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70 | } |
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71 | |
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72 | } |
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73 | |
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74 | public : void retire_write_new (bool restore, bool restore_old) |
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75 | { |
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76 | // restore restore_old is_link |
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77 | // 0 x 1 - normal case : allocate |
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78 | // 1 x 0 - event, need restore oldest register |
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79 | |
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80 | if (restore) |
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81 | { |
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82 | // test if is the actual mapping (in RAT) |
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83 | if (_is_link) |
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84 | _is_use = 0; |
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85 | |
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86 | _is_link = 0; |
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87 | } |
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88 | } |
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89 | |
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90 | public : void free (void) |
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91 | { |
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92 | _is_free = 1; |
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93 | } |
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94 | |
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95 | public : bool can_free (void) |
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96 | { |
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97 | return ((_is_free == 0) and |
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98 | (_is_link == 0) and |
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99 | (_is_use == 0)); |
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100 | } |
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101 | |
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102 | public : friend std::ostream& operator<< (std::ostream& output, |
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103 | stat_list_entry_t & x) |
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104 | { |
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105 | output << x._is_free << " " |
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106 | << x._is_link << " " |
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107 | << x._is_use ; |
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108 | |
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109 | return output; |
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110 | } |
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111 | |
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112 | }; |
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113 | |
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114 | |
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115 | }; // end namespace stat_list_unit |
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116 | }; // end namespace register_translation_unit |
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117 | }; // end namespace rename_unit |
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118 | }; // end namespace ooo_engine |
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119 | }; // end namespace multi_ooo_engine |
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120 | }; // end namespace core |
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121 | |
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122 | }; // end namespace behavioural |
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123 | }; // end namespace morpheo |
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124 | |
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125 | #endif |
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