1 | #ifdef SYSTEMC |
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2 | /* |
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3 | * $Id: Commit_unit_transition.cpp 122 2009-06-03 08:15:51Z rosiere $ |
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4 | * |
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5 | * [ Description ] |
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6 | * |
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7 | */ |
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8 | |
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9 | #include "Behavioural/Core/Multi_OOO_Engine/OOO_Engine/Commit_unit/include/Commit_unit.h" |
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10 | #include "Behavioural/include/Simulation.h" |
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11 | |
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12 | namespace morpheo { |
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13 | namespace behavioural { |
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14 | namespace core { |
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15 | namespace multi_ooo_engine { |
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16 | namespace ooo_engine { |
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17 | namespace commit_unit { |
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18 | |
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19 | #undef FUNCTION |
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20 | #define FUNCTION "Commit_unit::transition" |
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21 | void Commit_unit::transition (void) |
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22 | { |
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23 | log_begin(Commit_unit,FUNCTION); |
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24 | log_function(Commit_unit,FUNCTION,_name.c_str()); |
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25 | |
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26 | if (PORT_READ(in_NRESET) == 0) |
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27 | { |
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28 | // Clear all bank |
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29 | for (uint32_t i=0; i<_param->_nb_bank; ++i) |
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30 | { |
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31 | while(not _rob[i].empty()) |
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32 | { |
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33 | delete _rob[i].front(); |
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34 | _rob[i].pop_front(); |
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35 | } |
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36 | reg_BANK_PTR [i] = 0; |
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37 | } |
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38 | |
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39 | // Reset pointer |
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40 | reg_NUM_BANK_HEAD = 0; |
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41 | reg_NUM_BANK_TAIL = 0; |
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42 | reg_NUM_PTR_TAIL = 0; |
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43 | |
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44 | // Reset counter |
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45 | for (uint32_t i=0; i<_param->_nb_front_end; i++) |
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46 | for (uint32_t j=0; j<_param->_nb_context [i]; j++) |
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47 | { |
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48 | _nb_cycle_idle [i][j] = 0; |
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49 | |
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50 | reg_NB_INST_COMMIT_ALL [i][j] = 0; |
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51 | reg_NB_INST_COMMIT_MEM [i][j] = 0; |
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52 | |
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53 | reg_EVENT_STATE [i][j] = COMMIT_EVENT_STATE_NO_EVENT; |
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54 | // reg_EVENT_FLUSH [i][j] = false; |
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55 | reg_EVENT_STOP [i][j] = false; |
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56 | reg_EVENT_LAST [i][j] = false; |
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57 | |
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58 | // reg_PC_PREVIOUS [i][j] = (0x100-4)>>2; |
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59 | reg_PC_CURRENT [i][j] = (0x100 )>>2; |
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60 | reg_PC_CURRENT_IS_DS [i][j] = 0; |
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61 | reg_PC_CURRENT_IS_DS_TAKE [i][j] = 0; |
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62 | reg_PC_NEXT [i][j] = (0x100+4)>>2; |
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63 | } |
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64 | |
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65 | // Reset priority algorithm |
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66 | _priority_insert->reset(); |
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67 | } |
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68 | else |
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69 | { |
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70 | // Increase number idle cycle |
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71 | for (uint32_t i=0; i<_param->_nb_front_end; i++) |
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72 | for (uint32_t j=0; j<_param->_nb_context [i]; j++) |
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73 | _nb_cycle_idle [i][j] ++; |
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74 | |
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75 | // Compute next priority |
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76 | _priority_insert->transition(); |
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77 | |
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78 | // =================================================================== |
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79 | // =====[ GARBAGE COLLECTOR ]========================================= |
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80 | // =================================================================== |
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81 | for (uint32_t i=0; i<_param->_nb_front_end; i++) |
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82 | for (uint32_t j=0; j<_param->_nb_context [i]; j++) |
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83 | { |
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84 | // Test if can_restart : (can_restart is to signal at the state than the decod_queue is empty) |
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85 | // * no previous can_restart (trap for one) |
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86 | // * and decod_queue is empty |
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87 | // * and have an event or have a futur event |
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88 | if (not reg_EVENT_CAN_RESTART [i][j] and |
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89 | (PORT_READ(in_NB_INST_DECOD_ALL [i][j]) == 0) and |
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90 | (reg_EVENT_STOP [i][j] or (reg_EVENT_STATE [i][j] != COMMIT_EVENT_STATE_NO_EVENT))) |
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91 | reg_EVENT_CAN_RESTART [i][j] = true; |
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92 | |
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93 | // Test event state |
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94 | switch (reg_EVENT_STATE [i][j]) |
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95 | { |
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96 | case COMMIT_EVENT_STATE_EVENT : |
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97 | { |
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98 | // Have an event, test if all composant have ack |
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99 | if (internal_RETIRE_EVENT_VAL [i][j] and in_RETIRE_EVENT_ACK [i][j]) |
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100 | { |
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101 | // A minor optimisation : test if wait_decod is previously empty. |
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102 | if (not reg_EVENT_CAN_RESTART [i][j]) |
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103 | reg_EVENT_STATE [i][j] = COMMIT_EVENT_STATE_WAIT_DECOD; |
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104 | else |
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105 | reg_EVENT_STATE [i][j] = COMMIT_EVENT_STATE_WAIT_END; |
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106 | } |
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107 | |
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108 | break; |
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109 | } |
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110 | case COMMIT_EVENT_STATE_WAIT_DECOD : |
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111 | { |
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112 | // Wait flush of decod_queue. |
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113 | // Test if can restart now |
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114 | if (reg_EVENT_CAN_RESTART [i][j]) |
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115 | { |
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116 | //reg_EVENT_FLUSH [i][j] = false; |
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117 | |
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118 | // A minor optimisation : test if the last element is already retire |
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119 | if (not reg_EVENT_LAST [i][j]) |
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120 | reg_EVENT_STATE [i][j] = COMMIT_EVENT_STATE_WAIT_END; |
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121 | else |
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122 | reg_EVENT_STATE [i][j] = COMMIT_EVENT_STATE_END; |
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123 | } |
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124 | break; |
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125 | } |
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126 | case COMMIT_EVENT_STATE_WAIT_END : |
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127 | { |
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128 | // Wait the flush of Re Order Buffer. |
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129 | // Test if the last element is retire |
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130 | if (reg_EVENT_LAST [i][j]) |
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131 | reg_EVENT_STATE [i][j] = COMMIT_EVENT_STATE_END ; |
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132 | |
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133 | break; |
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134 | } |
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135 | case COMMIT_EVENT_STATE_END : |
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136 | { |
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137 | // Just one cycle |
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138 | |
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139 | // flush of re order buffer is finish |
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140 | reg_EVENT_STATE [i][j] = COMMIT_EVENT_STATE_NO_EVENT; |
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141 | reg_EVENT_LAST [i][j] = false; |
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142 | break; |
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143 | } |
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144 | //case COMMIT_EVENT_STATE_NO_EVENT : |
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145 | default : break; |
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146 | } |
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147 | } |
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148 | |
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149 | // =================================================================== |
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150 | // =====[ INSERT ]==================================================== |
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151 | // =================================================================== |
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152 | { |
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153 | // variable to count instruction insert |
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154 | uint32_t nb_insert = 0; |
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155 | |
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156 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
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157 | { |
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158 | // compute first bank number |
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159 | uint32_t num_bank = (reg_NUM_BANK_TAIL+i)%_param->_nb_bank; |
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160 | |
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161 | if (internal_BANK_INSERT_VAL [num_bank]) |
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162 | { |
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163 | // get rename unit source and instruction. |
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164 | uint32_t x = internal_BANK_INSERT_NUM_RENAME_UNIT [num_bank]; |
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165 | uint32_t y = internal_BANK_INSERT_NUM_INST [num_bank]; |
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166 | |
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167 | // Test if an instruction is valid |
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168 | // (all in_order insert combinatory is in rename_unit ) |
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169 | if (PORT_READ(in_INSERT_VAL [x][y])) |
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170 | { |
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171 | log_printf(TRACE,Commit_unit,FUNCTION," * INSERT [%d][%d]",x,y); |
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172 | |
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173 | // get information |
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174 | Tcontext_t front_end_id = (_param->_have_port_front_end_id)?PORT_READ(in_INSERT_FRONT_END_ID [x][y]):0; |
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175 | Tcontext_t context_id = (_param->_have_port_context_id )?PORT_READ(in_INSERT_CONTEXT_ID [x][y]):0; |
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176 | Ttype_t type = PORT_READ(in_INSERT_TYPE [x][y]); |
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177 | Toperation_t operation = PORT_READ(in_INSERT_OPERATION [x][y]); |
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178 | bool is_store = is_operation_memory_store(operation); |
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179 | |
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180 | Texception_t exception = PORT_READ(in_INSERT_EXCEPTION [x][y]); |
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181 | Tcontrol_t no_execute = PORT_READ(in_INSERT_NO_EXECUTE [x][y]); |
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182 | |
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183 | log_printf(TRACE,Commit_unit,FUNCTION," * front_end_id : %d",front_end_id); |
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184 | log_printf(TRACE,Commit_unit,FUNCTION," * context_id : %d",context_id); |
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185 | log_printf(TRACE,Commit_unit,FUNCTION," * type : %s",toString(type).c_str()); |
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186 | log_printf(TRACE,Commit_unit,FUNCTION," * operation : %d",operation ); |
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187 | log_printf(TRACE,Commit_unit,FUNCTION," * exception : %d",exception ); |
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188 | |
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189 | // Create new entry and write information |
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190 | entry_t * entry = new entry_t; |
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191 | uint32_t ptr = reg_BANK_PTR [num_bank]; |
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192 | |
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193 | entry->ptr = ptr; |
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194 | entry->front_end_id = front_end_id; |
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195 | entry->context_id = context_id ; |
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196 | entry->rename_unit_id = x; |
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197 | entry->depth = (_param->_have_port_depth)?PORT_READ(in_INSERT_DEPTH [x][y]):0; |
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198 | entry->type = type; |
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199 | entry->operation = operation; |
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200 | entry->is_delay_slot = PORT_READ(in_INSERT_IS_DELAY_SLOT [x][y]); |
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201 | // entry->address = PORT_READ(in_INSERT_ADDRESS [x][y]); |
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202 | entry->exception = exception; |
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203 | entry->exception_use = PORT_READ(in_INSERT_EXCEPTION_USE [x][y]); |
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204 | entry->use_store_queue = (type == TYPE_MEMORY) and ( is_store) and (not no_execute); |
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205 | entry->use_load_queue = (type == TYPE_MEMORY) and (not is_store) and (not no_execute); |
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206 | entry->store_queue_ptr_write = PORT_READ(in_INSERT_STORE_QUEUE_PTR_WRITE [x][y]); |
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207 | entry->load_queue_ptr_write = (_param->_have_port_load_queue_ptr)?PORT_READ(in_INSERT_LOAD_QUEUE_PTR_WRITE [x][y]):0; |
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208 | #ifdef DEBUG |
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209 | entry->read_ra = PORT_READ(in_INSERT_READ_RA [x][y]); |
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210 | entry->num_reg_ra_log = PORT_READ(in_INSERT_NUM_REG_RA_LOG [x][y]); |
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211 | entry->num_reg_ra_phy = PORT_READ(in_INSERT_NUM_REG_RA_PHY [x][y]); |
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212 | entry->read_rb = PORT_READ(in_INSERT_READ_RB [x][y]); |
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213 | entry->num_reg_rb_log = PORT_READ(in_INSERT_NUM_REG_RB_LOG [x][y]); |
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214 | entry->num_reg_rb_phy = PORT_READ(in_INSERT_NUM_REG_RB_PHY [x][y]); |
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215 | entry->read_rc = PORT_READ(in_INSERT_READ_RC [x][y]); |
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216 | entry->num_reg_rc_log = PORT_READ(in_INSERT_NUM_REG_RC_LOG [x][y]); |
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217 | entry->num_reg_rc_phy = PORT_READ(in_INSERT_NUM_REG_RC_PHY [x][y]); |
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218 | #endif |
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219 | entry->write_rd = PORT_READ(in_INSERT_WRITE_RD [x][y]); |
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220 | entry->num_reg_rd_log = PORT_READ(in_INSERT_NUM_REG_RD_LOG [x][y]); |
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221 | entry->num_reg_rd_phy_old = PORT_READ(in_INSERT_NUM_REG_RD_PHY_OLD [x][y]); |
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222 | entry->num_reg_rd_phy_new = PORT_READ(in_INSERT_NUM_REG_RD_PHY_NEW [x][y]); |
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223 | entry->write_re = PORT_READ(in_INSERT_WRITE_RE [x][y]); |
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224 | entry->num_reg_re_log = PORT_READ(in_INSERT_NUM_REG_RE_LOG [x][y]); |
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225 | entry->num_reg_re_phy_old = PORT_READ(in_INSERT_NUM_REG_RE_PHY_OLD [x][y]); |
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226 | entry->num_reg_re_phy_new = PORT_READ(in_INSERT_NUM_REG_RE_PHY_NEW [x][y]); |
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227 | entry->no_sequence = type == TYPE_BRANCH; |
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228 | entry->speculative = true; |
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229 | #ifdef DEBUG |
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230 | entry->address = PORT_READ(in_INSERT_ADDRESS [x][y]); |
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231 | #endif |
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232 | entry->address_next = PORT_READ(in_INSERT_ADDRESS_NEXT [x][y]); |
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233 | #ifdef DEBUG |
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234 | entry->cycle_rob_in = simulation_cycle(); |
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235 | entry->cycle_commit = simulation_cycle(); |
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236 | #endif |
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237 | |
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238 | // Test if exception : |
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239 | // * yes : no execute instruction, wait ROB Head |
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240 | // * no : test if no_execute (== instruction is flushed) |
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241 | // else test type |
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242 | // * BRANCH : l.j -> branch is ended |
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243 | // other -> wait the execution end of branchment |
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244 | // * MEMORY : store -> wait store is at head of ROB |
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245 | // other -> wait end of instruction |
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246 | // * OTHER |
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247 | |
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248 | { |
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249 | if (exception == EXCEPTION_NONE) |
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250 | { |
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251 | // no_execute : l.j, l.nop, l.rfe |
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252 | |
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253 | log_printf(TRACE,Commit_unit,FUNCTION," * no_execute : %d",no_execute); |
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254 | |
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255 | switch (type) |
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256 | { |
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257 | case TYPE_BRANCH : {entry->state=(no_execute==1)?ROB_BRANCH_COMPLETE:ROB_BRANCH_WAIT_END ; break;} |
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258 | case TYPE_MEMORY : {entry->state=(no_execute==1)?ROB_END_OK_SPECULATIVE:(entry->state=(is_store ==1)?ROB_STORE_WAIT_END_OK:ROB_OTHER_WAIT_END); break;} |
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259 | default : {entry->state=(no_execute==1)?ROB_END_OK_SPECULATIVE:ROB_OTHER_WAIT_END; break;} |
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260 | } |
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261 | } |
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262 | else |
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263 | { |
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264 | // Have an exception : wait head of ROB |
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265 | // in_INSERT_NO_EXECUTE [x][y] : l.sys, l.trap |
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266 | |
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267 | entry->state = ROB_END_EXCEPTION_WAIT_HEAD; |
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268 | } |
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269 | } |
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270 | |
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271 | #ifdef STATISTICS |
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272 | if (usage_is_set(_usage,USE_STATISTICS)) |
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273 | (*_stat_nb_inst_insert [x]) ++; |
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274 | #endif |
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275 | |
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276 | // Push entry in rob |
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277 | _rob[num_bank].push_back(entry); |
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278 | |
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279 | // Update counter and pointer |
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280 | reg_NB_INST_COMMIT_ALL [front_end_id][context_id] ++; |
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281 | if (type == TYPE_MEMORY) |
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282 | reg_NB_INST_COMMIT_MEM [front_end_id][context_id] ++; |
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283 | |
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284 | |
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285 | // flush = present event or future event. |
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286 | // * present event = don't can restart |
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287 | |
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288 | // bool flush = reg_EVENT_FLUSH [front_end_id][context_id]; |
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289 | |
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290 | // bool flush = (((reg_EVENT_STATE [front_end_id][context_id] == COMMIT_EVENT_STATE_EVENT) or |
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291 | // (reg_EVENT_STATE [front_end_id][context_id] == COMMIT_EVENT_STATE_WAIT_DECOD)) or |
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292 | // (reg_EVENT_STOP [front_end_id][context_id])); |
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293 | |
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294 | // New instruction from decod_queue. Flush if : |
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295 | // * future event (instruction don't need execute because they are a previous event (miss load/branch or exception)) |
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296 | // * or present_event |
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297 | // * and not can_restart (previous empty decod queue), because between the event_stop (branch_complete) and the state event (miss in head), many cycle is occured. |
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298 | bool flush = ((// present event |
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299 | ((reg_EVENT_STATE [front_end_id][context_id] == COMMIT_EVENT_STATE_EVENT) or |
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300 | (reg_EVENT_STATE [front_end_id][context_id] == COMMIT_EVENT_STATE_WAIT_DECOD)) or |
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301 | // futur event |
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302 | reg_EVENT_STOP [front_end_id][context_id]) |
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303 | // can't restart |
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304 | and not reg_EVENT_CAN_RESTART[front_end_id][context_id] |
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305 | ); |
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306 | |
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307 | if (flush) |
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308 | { |
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309 | // A new invalid instruction is push in rob -> new last instruction |
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310 | reg_EVENT_LAST [front_end_id][context_id] = false; |
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311 | reg_EVENT_LAST_NUM_BANK [front_end_id][context_id] = num_bank; |
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312 | reg_EVENT_LAST_NUM_PTR [front_end_id][context_id] = ptr; |
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313 | } |
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314 | |
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315 | // Update pointer |
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316 | reg_NUM_PTR_TAIL = ptr; |
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317 | reg_BANK_PTR [num_bank] = (reg_BANK_PTR [num_bank]+1)%_param->_size_bank; |
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318 | nb_insert ++; |
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319 | } |
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320 | } |
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321 | } |
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322 | // Update pointer |
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323 | reg_NUM_BANK_TAIL = (reg_NUM_BANK_TAIL+nb_insert)%_param->_nb_bank; |
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324 | } |
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325 | |
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326 | // =================================================================== |
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327 | // =====[ COMMIT ]==================================================== |
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328 | // =================================================================== |
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329 | |
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330 | #ifdef STATISTICS |
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331 | if (usage_is_set(_usage,USE_STATISTICS)) |
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332 | (*_stat_nb_inst_commit_conflit_access) += internal_BANK_COMMIT_CONFLIT_ACCESS; |
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333 | #endif |
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334 | |
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335 | // For each commit instruction ... |
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336 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
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337 | for (uint32_t j=0; j<_param->_nb_bank_access_commit; j++) |
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338 | // ... test if an instruction have finish this execution |
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339 | if (internal_BANK_COMMIT_VAL [i][j]) |
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340 | { |
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341 | // An instruction is executed -> Change state of this instruction |
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342 | |
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343 | // Get information |
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344 | uint32_t x = internal_BANK_COMMIT_NUM_INST [i][j]; |
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345 | |
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346 | // Test if instruction is valid and is enable |
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347 | // (can be disable if this instruction is reexecute) |
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348 | if (PORT_READ(in_COMMIT_VAL [x]) and PORT_READ(in_COMMIT_WEN [x])) |
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349 | { |
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350 | log_printf(TRACE,Commit_unit,FUNCTION," * COMMIT [%d]",x); |
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351 | |
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352 | #ifdef STATISTICS |
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353 | if (usage_is_set(_usage,USE_STATISTICS)) |
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354 | (*_stat_nb_inst_commit) ++; |
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355 | #endif |
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356 | |
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357 | log_printf(TRACE,Commit_unit,FUNCTION," * num_bank : %d",i); |
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358 | |
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359 | // find the good entry !!! |
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360 | entry_t * entry = internal_BANK_COMMIT_ENTRY [i][j]; |
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361 | |
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362 | //Toperation_t operation = PORT_READ(in_COMMIT_OPERATION [x]); |
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363 | Ttype_t type = entry->type; |
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364 | Tcontrol_t no_sequence = PORT_READ(in_COMMIT_NO_SEQUENCE [x]); |
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365 | |
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366 | #if 0 |
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367 | if ((type == TYPE_MEMORY) and no_sequence) |
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368 | continue; |
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369 | #endif |
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370 | |
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371 | Texception_t exception = PORT_READ(in_COMMIT_EXCEPTION [x]); |
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372 | |
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373 | rob_state_t state = entry->state; |
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374 | Tcontext_t front_end_id = entry->front_end_id; |
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375 | Tcontext_t context_id = entry->context_id; |
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376 | |
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377 | // change state : test exception_use |
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378 | |
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379 | bool have_exception = false; |
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380 | bool have_miss_speculation = false; |
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381 | |
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382 | // Test if have an exception ... |
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383 | if (exception != EXCEPTION_NONE) |
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384 | { |
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385 | // Test if the instruction is a load and is a miss speculation |
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386 | // (load is commit, but they have an dependence with a previous store -> need restart pipeline) |
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387 | |
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388 | have_miss_speculation = (exception == EXCEPTION_MEMORY_MISS_SPECULATION); |
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389 | |
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390 | // * Test if the exception generated can be trap by this exception |
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391 | switch (entry->exception_use) |
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392 | { |
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393 | // Have overflow exception if bit overflow enable is set. |
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394 | case EXCEPTION_USE_RANGE : {have_exception = ((exception == EXCEPTION_RANGE) and PORT_READ(in_SPR_READ_SR_OVE[front_end_id][context_id])); break;} |
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395 | case EXCEPTION_USE_MEMORY_WITH_ALIGNMENT : {have_exception = ((exception == EXCEPTION_BUS_ERROR) or |
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396 | (exception == EXCEPTION_DATA_TLB ) or |
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397 | (exception == EXCEPTION_DATA_PAGE) or |
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398 | (exception == EXCEPTION_ALIGNMENT)); break;}; |
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399 | case EXCEPTION_USE_MEMORY_WITHOUT_ALIGNMENT : {have_exception = ((exception == EXCEPTION_BUS_ERROR) or |
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400 | (exception == EXCEPTION_DATA_TLB ) or |
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401 | (exception == EXCEPTION_DATA_PAGE)); break;}; |
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402 | case EXCEPTION_USE_CUSTOM_0 : {have_exception = (exception == EXCEPTION_CUSTOM_0); break;}; |
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403 | case EXCEPTION_USE_CUSTOM_1 : {have_exception = (exception == EXCEPTION_CUSTOM_1); break;}; |
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404 | case EXCEPTION_USE_CUSTOM_2 : {have_exception = (exception == EXCEPTION_CUSTOM_2); break;}; |
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405 | case EXCEPTION_USE_CUSTOM_3 : {have_exception = (exception == EXCEPTION_CUSTOM_3); break;}; |
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406 | case EXCEPTION_USE_CUSTOM_4 : {have_exception = (exception == EXCEPTION_CUSTOM_4); break;}; |
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407 | case EXCEPTION_USE_CUSTOM_5 : {have_exception = (exception == EXCEPTION_CUSTOM_5); break;}; |
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408 | case EXCEPTION_USE_CUSTOM_6 : {have_exception = (exception == EXCEPTION_CUSTOM_6); break;}; |
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409 | // Case already manage (decod stage -> in insert in ROB) |
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410 | case EXCEPTION_USE_TRAP : {have_exception = false; exception = EXCEPTION_NONE; break;}; |
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411 | case EXCEPTION_USE_NONE : {have_exception = false; exception = EXCEPTION_NONE; break;}; |
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412 | case EXCEPTION_USE_ILLEGAL_INSTRUCTION : {have_exception = false; exception = EXCEPTION_NONE; break;}; |
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413 | case EXCEPTION_USE_SYSCALL : {have_exception = false; exception = EXCEPTION_NONE; break;}; |
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414 | default : |
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415 | { |
---|
416 | throw ERRORMORPHEO(FUNCTION,_("Commit : invalid exception_use.\n")); |
---|
417 | break; |
---|
418 | } |
---|
419 | } |
---|
420 | } |
---|
421 | |
---|
422 | // Next state depends of previous state |
---|
423 | switch (state) |
---|
424 | { |
---|
425 | // Branch : if no exception, the branchement can be completed |
---|
426 | case ROB_BRANCH_WAIT_END : |
---|
427 | { |
---|
428 | if (not have_exception) |
---|
429 | state = ROB_BRANCH_COMPLETE; |
---|
430 | else |
---|
431 | state = ROB_END_EXCEPTION_WAIT_HEAD; |
---|
432 | break; |
---|
433 | } |
---|
434 | // Previous event -> set state as execute |
---|
435 | case ROB_STORE_KO_WAIT_END : |
---|
436 | case ROB_EVENT_WAIT_END : |
---|
437 | { |
---|
438 | state = ROB_END_KO_SPECULATIVE; |
---|
439 | break; |
---|
440 | } |
---|
441 | // No previous event - Load and other instruction |
---|
442 | case ROB_STORE_OK_WAIT_END : |
---|
443 | case ROB_OTHER_WAIT_END : |
---|
444 | { |
---|
445 | if (not have_exception) |
---|
446 | { |
---|
447 | if (not have_miss_speculation) |
---|
448 | state = ROB_END_OK_SPECULATIVE; |
---|
449 | else |
---|
450 | state = ROB_END_LOAD_MISS_SPECULATIVE; |
---|
451 | } |
---|
452 | else |
---|
453 | state = ROB_END_EXCEPTION_WAIT_HEAD; |
---|
454 | break; |
---|
455 | } |
---|
456 | case ROB_STORE_WAIT_END_OK : |
---|
457 | { |
---|
458 | if (not have_exception) |
---|
459 | state = ROB_STORE_OK; |
---|
460 | else |
---|
461 | state = ROB_STORE_EVENT; |
---|
462 | break; |
---|
463 | } |
---|
464 | case ROB_STORE_WAIT_END_KO : |
---|
465 | { |
---|
466 | // if (not have_exception) |
---|
467 | state = ROB_STORE_KO; |
---|
468 | // else |
---|
469 | // state = ROB_END_EXCEPTION_WAIT_HEAD; |
---|
470 | break; |
---|
471 | } |
---|
472 | |
---|
473 | |
---|
474 | default : |
---|
475 | { |
---|
476 | throw ERRORMORPHEO(FUNCTION,toString(_("Commit [%d] : Bank [%d][%d], invalid state value (%s).\n"),x,i,j,toString(state).c_str())); |
---|
477 | break; |
---|
478 | } |
---|
479 | } |
---|
480 | |
---|
481 | // Commit an instruction ... |
---|
482 | // Test if have an event (miss_speculation or exception) and not manage a previous event |
---|
483 | // if yes, this instruction would modify state machine. Also stop Re Order Buffer |
---|
484 | |
---|
485 | // bool flush = reg_EVENT_FLUSH [entry->front_end_id][entry->context_id]; |
---|
486 | bool flush = ((reg_EVENT_STATE [entry->front_end_id][entry->context_id] == COMMIT_EVENT_STATE_EVENT) or |
---|
487 | (reg_EVENT_STATE [entry->front_end_id][entry->context_id] == COMMIT_EVENT_STATE_WAIT_DECOD) or |
---|
488 | (reg_EVENT_STATE [entry->front_end_id][entry->context_id] == COMMIT_EVENT_STATE_WAIT_END)); |
---|
489 | |
---|
490 | if ((have_exception or have_miss_speculation) and (not flush)) |
---|
491 | { |
---|
492 | uint32_t packet = ((entry->ptr << _param->_shift_num_slot) | i); |
---|
493 | |
---|
494 | // test have a previous event detected (event_stop = 1) |
---|
495 | // if yes, test if the actual event if "before (in order)" that the previous event |
---|
496 | if (reg_EVENT_STOP [entry->front_end_id][entry->context_id]) |
---|
497 | { |
---|
498 | // Compare packet_id (by construction instruction is insert in order by increase packet_id) |
---|
499 | |
---|
500 | uint32_t _top = ((_rob[ reg_NUM_BANK_HEAD].front()->ptr << _param->_shift_num_slot) | reg_NUM_BANK_HEAD); |
---|
501 | uint32_t _old = reg_EVENT_PACKET [entry->front_end_id][entry->context_id]; |
---|
502 | uint32_t _new = packet; |
---|
503 | if (_old < _top) _old = _old+_param->_size_queue; |
---|
504 | if (_new < _top) _new = _new+_param->_size_queue; |
---|
505 | if (_new < _old) reg_EVENT_PACKET [entry->front_end_id][entry->context_id] = packet; |
---|
506 | } |
---|
507 | else |
---|
508 | reg_EVENT_PACKET [entry->front_end_id][entry->context_id] = packet; |
---|
509 | |
---|
510 | // have an error, stop issue instruction |
---|
511 | reg_EVENT_STOP [entry->front_end_id][entry->context_id] = true; |
---|
512 | // reg_EVENT_NUM_BANK [entry->front_end_id][entry->context_id] = i; |
---|
513 | // reg_EVENT_NUM_PTR [entry->front_end_id][entry->context_id] = entry->ptr; |
---|
514 | |
---|
515 | // reg_EVENT_CAN_RESTART [entry->front_end_id][entry->context_id] = false; |
---|
516 | reg_EVENT_LAST_NUM_BANK [entry->front_end_id][entry->context_id] = ((reg_NUM_BANK_TAIL==0)?_param->_nb_bank:reg_NUM_BANK_TAIL)-1; |
---|
517 | reg_EVENT_LAST_NUM_PTR [entry->front_end_id][entry->context_id] = reg_NUM_PTR_TAIL; |
---|
518 | } |
---|
519 | |
---|
520 | // Update Re Order Buffer |
---|
521 | entry->state = state; |
---|
522 | entry->exception = exception; |
---|
523 | entry->flags = PORT_READ(in_COMMIT_FLAGS [x]); |
---|
524 | entry->no_sequence = no_sequence; |
---|
525 | // jalr, jr : address_dest is in register |
---|
526 | if (( type == TYPE_BRANCH) and |
---|
527 | (entry->operation == OPERATION_BRANCH_L_JALR) and |
---|
528 | (entry->read_rb)) |
---|
529 | entry->address_next = PORT_READ(in_COMMIT_ADDRESS [x]); |
---|
530 | |
---|
531 | #ifdef DEBUG |
---|
532 | entry->load_data = PORT_READ(in_COMMIT_ADDRESS [x]); |
---|
533 | entry->cycle_commit = simulation_cycle(); |
---|
534 | #endif |
---|
535 | } |
---|
536 | } |
---|
537 | |
---|
538 | // =================================================================== |
---|
539 | // =====[ RETIRE ]==================================================== |
---|
540 | // =================================================================== |
---|
541 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
---|
542 | { |
---|
543 | // Compute bank number |
---|
544 | uint32_t num_bank = (internal_BANK_RETIRE_HEAD+i)%_param->_nb_bank; |
---|
545 | |
---|
546 | // Test if have an request |
---|
547 | if (internal_BANK_RETIRE_VAL [num_bank]) |
---|
548 | { |
---|
549 | // Take num instruction |
---|
550 | uint32_t x = internal_BANK_RETIRE_NUM_RENAME_UNIT [num_bank]; |
---|
551 | uint32_t y = internal_BANK_RETIRE_NUM_INST [num_bank]; |
---|
552 | |
---|
553 | log_printf(TRACE,Commit_unit,FUNCTION," * RETIRE [%d][%d]",x,y); |
---|
554 | log_printf(TRACE,Commit_unit,FUNCTION," * num_bank : %d",num_bank ); |
---|
555 | |
---|
556 | #ifdef DEBUG_TEST |
---|
557 | if (not PORT_READ(in_RETIRE_ACK [x][y])) |
---|
558 | throw ERRORMORPHEO(FUNCTION,_("Retire : retire_ack must be set.\n")); |
---|
559 | #endif |
---|
560 | |
---|
561 | |
---|
562 | #ifdef STATISTICS |
---|
563 | if (usage_is_set(_usage,USE_STATISTICS)) |
---|
564 | (*_stat_nb_inst_retire [x]) ++; |
---|
565 | |
---|
566 | #endif |
---|
567 | |
---|
568 | // Read information |
---|
569 | entry_t * entry = _rob [num_bank].front(); |
---|
570 | |
---|
571 | entry->state_old = entry->state; |
---|
572 | entry->state = ROB_END; |
---|
573 | } |
---|
574 | } |
---|
575 | |
---|
576 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
---|
577 | { |
---|
578 | // Compute bank number |
---|
579 | bool can_continue = false; |
---|
580 | uint32_t num_bank = reg_NUM_BANK_HEAD; |
---|
581 | |
---|
582 | if (not _rob [num_bank].empty ()) |
---|
583 | { |
---|
584 | entry_t * entry = _rob [num_bank].front(); |
---|
585 | |
---|
586 | if (entry->state == ROB_END) |
---|
587 | { |
---|
588 | log_printf(TRACE,Commit_unit,FUNCTION," * RETIRE_ROB [%d]",num_bank); |
---|
589 | |
---|
590 | can_continue = true; |
---|
591 | |
---|
592 | Tcontext_t front_end_id = entry->front_end_id; |
---|
593 | Tcontext_t context_id = entry->context_id ; |
---|
594 | uint32_t num_thread = _param->_translate_num_context_to_num_thread [front_end_id][context_id]; |
---|
595 | rob_state_t state = entry->state_old; |
---|
596 | Ttype_t type = entry->type ; |
---|
597 | bool retire_ok = false; |
---|
598 | uint32_t packet_id = ((entry->ptr << _param->_shift_num_slot) | num_bank); |
---|
599 | |
---|
600 | log_printf(TRACE,Commit_unit,FUNCTION," * front_end_id : %d",front_end_id ); |
---|
601 | log_printf(TRACE,Commit_unit,FUNCTION," * context_id : %d",context_id ); |
---|
602 | log_printf(TRACE,Commit_unit,FUNCTION," * rob_ptr : %d",packet_id ); |
---|
603 | log_printf(TRACE,Commit_unit,FUNCTION," * num_thread : %d",num_thread ); |
---|
604 | log_printf(TRACE,Commit_unit,FUNCTION," * type : %s",toString(type).c_str()); |
---|
605 | log_printf(TRACE,Commit_unit,FUNCTION," * state : %s",toString(state).c_str()); |
---|
606 | |
---|
607 | // Test if the instruction is valid |
---|
608 | // (BRANCH_MISS = instruction branch is valid, but have make an invalid prediction) |
---|
609 | // (LOAD_MISS = instruction load is valid, but have make an invalid result) |
---|
610 | if ((state == ROB_END_OK ) or |
---|
611 | // (state == ROB_END_KO ) or |
---|
612 | (state == ROB_END_BRANCH_MISS) or |
---|
613 | (state == ROB_END_LOAD_MISS )// or |
---|
614 | // (state == ROB_END_MISS ) or |
---|
615 | // (state == ROB_END_EXCEPTION ) |
---|
616 | ) |
---|
617 | { |
---|
618 | log_printf(TRACE,Commit_unit,FUNCTION," * retire_ok"); |
---|
619 | |
---|
620 | retire_ok = true; |
---|
621 | |
---|
622 | // Update PC information |
---|
623 | // reg_PC_PREVIOUS [front_end_id][context_id] = reg_PC_CURRENT [front_end_id][context_id]; |
---|
624 | reg_PC_CURRENT [front_end_id][context_id] = reg_PC_NEXT [front_end_id][context_id]; |
---|
625 | reg_PC_CURRENT_IS_DS [front_end_id][context_id] = type == TYPE_BRANCH; |
---|
626 | reg_PC_CURRENT_IS_DS_TAKE [front_end_id][context_id] = entry->no_sequence; |
---|
627 | reg_PC_NEXT [front_end_id][context_id] = (entry->no_sequence)?(entry->address_next):(reg_PC_CURRENT [front_end_id][context_id]+1); |
---|
628 | } |
---|
629 | |
---|
630 | // Test if have an event |
---|
631 | if ((state == ROB_END_BRANCH_MISS) or |
---|
632 | (state == ROB_END_LOAD_MISS)) |
---|
633 | { |
---|
634 | reg_EVENT_STATE [front_end_id][context_id] = COMMIT_EVENT_STATE_EVENT; |
---|
635 | // reg_EVENT_FLUSH [front_end_id][context_id] = true; |
---|
636 | reg_EVENT_STOP [front_end_id][context_id] = false; // instruction flow can continue |
---|
637 | // reg_EVENT_CAN_RESTART [front_end_id][context_id] = false; |
---|
638 | reg_EVENT_LAST [front_end_id][context_id] = false; |
---|
639 | // it the head ! |
---|
640 | reg_EVENT_PACKET [front_end_id][context_id] = packet_id; |
---|
641 | |
---|
642 | // If event is an load_miss, many instruction can be inserted. |
---|
643 | // -> new last instruction |
---|
644 | if (state == ROB_END_LOAD_MISS) |
---|
645 | { |
---|
646 | reg_EVENT_CAN_RESTART [front_end_id][context_id] = false; |
---|
647 | |
---|
648 | reg_EVENT_LAST_NUM_BANK [front_end_id][context_id] = ((reg_NUM_BANK_TAIL==0)?_param->_nb_bank:reg_NUM_BANK_TAIL)-1; |
---|
649 | reg_EVENT_LAST_NUM_PTR [front_end_id][context_id] = reg_NUM_PTR_TAIL; |
---|
650 | } |
---|
651 | } |
---|
652 | |
---|
653 | // Test if this instruction is the last instruction of an event |
---|
654 | // * need event |
---|
655 | // * packet id = last packet id |
---|
656 | if ((reg_EVENT_STATE [front_end_id][context_id] != COMMIT_EVENT_STATE_NO_EVENT) and |
---|
657 | (reg_EVENT_LAST_NUM_BANK [front_end_id][context_id] == num_bank ) and |
---|
658 | (reg_EVENT_LAST_NUM_PTR [front_end_id][context_id] == entry->ptr )) |
---|
659 | reg_EVENT_LAST [front_end_id][context_id] = true; |
---|
660 | |
---|
661 | // Update nb_inst |
---|
662 | reg_NB_INST_COMMIT_ALL [front_end_id][context_id] --; |
---|
663 | if (type == TYPE_MEMORY) |
---|
664 | reg_NB_INST_COMMIT_MEM [front_end_id][context_id] --; |
---|
665 | |
---|
666 | // Update pointer |
---|
667 | reg_NUM_BANK_HEAD = (num_bank+1)%_param->_nb_bank; |
---|
668 | |
---|
669 | // Remove entry |
---|
670 | delete entry; |
---|
671 | _rob [num_bank].pop_front(); |
---|
672 | |
---|
673 | // Reset watch dog timer because have transaction on retire interface |
---|
674 | _nb_cycle_idle [front_end_id][context_id] = 0; |
---|
675 | |
---|
676 | // Increase stop condition |
---|
677 | if (retire_ok) |
---|
678 | _simulation_nb_instruction_commited [num_thread] ++; |
---|
679 | |
---|
680 | #ifdef STATISTICS |
---|
681 | if (usage_is_set(_usage,USE_STATISTICS)) |
---|
682 | { |
---|
683 | if (retire_ok) |
---|
684 | { |
---|
685 | (*_stat_nb_inst_retire_ok [num_thread]) ++; |
---|
686 | (*_stat_nb_inst_type [type] ) ++; |
---|
687 | } |
---|
688 | else |
---|
689 | (*_stat_nb_inst_retire_ko [num_thread]) ++; |
---|
690 | } |
---|
691 | #endif |
---|
692 | |
---|
693 | #if defined(DEBUG) and defined(DEBUG_Commit_unit) and (DEBUG_Commit_unit == true) |
---|
694 | { |
---|
695 | // log file |
---|
696 | instruction_log_file [num_thread] |
---|
697 | << "[" << simulation_cycle() << "] " |
---|
698 | << std::hex |
---|
699 | << (entry->address<<2) << " (" << (entry->address) << ") " |
---|
700 | << std::dec |
---|
701 | << "[" << entry->cycle_rob_in << ", " << entry->cycle_commit << "] " |
---|
702 | << "{" << ((retire_ok)?"OK":"KO") << "} "; |
---|
703 | |
---|
704 | if ((type == TYPE_MEMORY) and is_operation_memory_load(entry->operation)) |
---|
705 | instruction_log_file [num_thread] << std::hex << entry->load_data << std::dec; |
---|
706 | |
---|
707 | instruction_log_file [num_thread] << std::endl; |
---|
708 | } |
---|
709 | #endif |
---|
710 | } |
---|
711 | } |
---|
712 | |
---|
713 | if (not can_continue) |
---|
714 | break; // stop scan |
---|
715 | } |
---|
716 | |
---|
717 | // =================================================================== |
---|
718 | // =====[ REEXECUTE ]================================================= |
---|
719 | // =================================================================== |
---|
720 | // Test if have an reexecute instruction (an store in head of rob) |
---|
721 | for (uint32_t i=0; i<_param->_nb_inst_reexecute; ++i) |
---|
722 | if (internal_REEXECUTE_VAL [i] and PORT_READ(in_REEXECUTE_ACK [i])) |
---|
723 | { |
---|
724 | log_printf(TRACE,Commit_unit,FUNCTION," * REEXECUTE [%d]",i); |
---|
725 | |
---|
726 | uint32_t num_bank = internal_REEXECUTE_NUM_BANK [i]; |
---|
727 | |
---|
728 | entry_t * entry = _rob [num_bank].front(); |
---|
729 | rob_state_t state = entry->state; |
---|
730 | |
---|
731 | // Change state |
---|
732 | switch (state) |
---|
733 | { |
---|
734 | case ROB_STORE_OK : {state = ROB_STORE_OK_WAIT_END; break; } |
---|
735 | case ROB_STORE_KO : {state = ROB_STORE_KO_WAIT_END; break; } |
---|
736 | case ROB_STORE_EVENT : {state = ROB_EVENT_WAIT_END; break; } |
---|
737 | default : {throw ERRORMORPHEO(FUNCTION,_("Reexecute : invalid state value.\n"));} |
---|
738 | } |
---|
739 | |
---|
740 | entry->state = state; |
---|
741 | } |
---|
742 | |
---|
743 | // =================================================================== |
---|
744 | // =====[ BRANCH_COMPLETE ]=========================================== |
---|
745 | // =================================================================== |
---|
746 | for (uint32_t i=0; i<_param->_nb_inst_branch_complete; i++) |
---|
747 | // Test if the prediction_unit have accept the branch complete transaction |
---|
748 | if (internal_BRANCH_COMPLETE_VAL [i] and PORT_READ(in_BRANCH_COMPLETE_ACK [i])) |
---|
749 | { |
---|
750 | log_printf(TRACE,Commit_unit,FUNCTION," * BRANCH_COMPLETE [%d]",i); |
---|
751 | |
---|
752 | // Read information |
---|
753 | uint32_t num_bank = internal_BRANCH_COMPLETE_NUM_BANK [i]; |
---|
754 | |
---|
755 | entry_t * entry = _rob [num_bank].front(); |
---|
756 | |
---|
757 | #ifdef DEBUG_TEST |
---|
758 | rob_state_t state = entry->state; |
---|
759 | if (state != ROB_BRANCH_COMPLETE) |
---|
760 | throw ERRORMORPHEO(FUNCTION,_("Branch_complete : Invalid state value.\n")); |
---|
761 | #endif |
---|
762 | Tcontrol_t miss = PORT_READ(in_BRANCH_COMPLETE_MISS_PREDICTION [i]); |
---|
763 | |
---|
764 | log_printf(TRACE,Commit_unit,FUNCTION," * miss_prediction : %d",miss); |
---|
765 | |
---|
766 | entry->state = (miss)?ROB_END_BRANCH_MISS_SPECULATIVE:ROB_END_OK_SPECULATIVE; |
---|
767 | |
---|
768 | // bool flush = reg_EVENT_FLUSH [entry->front_end_id][entry->context_id]; |
---|
769 | |
---|
770 | // Branch_complete can be execute if |
---|
771 | // * no present event |
---|
772 | // * futur event and most not speculative that the event |
---|
773 | |
---|
774 | // Also, test if in this cycle, they have not an most recently event !!! |
---|
775 | if (miss) |
---|
776 | { |
---|
777 | uint32_t packet = ((entry->ptr << _param->_shift_num_slot) | num_bank); |
---|
778 | |
---|
779 | // test if this packet is before previous event |
---|
780 | if (reg_EVENT_STOP [entry->front_end_id][entry->context_id]) |
---|
781 | { |
---|
782 | uint32_t _top = ((_rob[ reg_NUM_BANK_HEAD].front()->ptr << _param->_shift_num_slot) | reg_NUM_BANK_HEAD); |
---|
783 | uint32_t _old = reg_EVENT_PACKET [entry->front_end_id][entry->context_id]; |
---|
784 | uint32_t _new = packet; |
---|
785 | if (_old < _top) _old = _old+_param->_size_queue; |
---|
786 | if (_new < _top) _new = _new+_param->_size_queue; |
---|
787 | if (_new < _old) reg_EVENT_PACKET [entry->front_end_id][entry->context_id] = packet; |
---|
788 | } |
---|
789 | else |
---|
790 | reg_EVENT_PACKET [entry->front_end_id][entry->context_id] = packet; |
---|
791 | |
---|
792 | // In all case, stop instruction flow |
---|
793 | reg_EVENT_STOP [entry->front_end_id][entry->context_id] = true; |
---|
794 | // reg_EVENT_NUM_BANK [entry->front_end_id][entry->context_id] = num_bank; |
---|
795 | // reg_EVENT_NUM_PTR [entry->front_end_id][entry->context_id] = entry->ptr; |
---|
796 | |
---|
797 | reg_EVENT_CAN_RESTART [entry->front_end_id][entry->context_id] = false; |
---|
798 | |
---|
799 | reg_EVENT_LAST_NUM_BANK [entry->front_end_id][entry->context_id] = ((reg_NUM_BANK_TAIL==0)?_param->_nb_bank:reg_NUM_BANK_TAIL)-1; |
---|
800 | reg_EVENT_LAST_NUM_PTR [entry->front_end_id][entry->context_id] = reg_NUM_PTR_TAIL; |
---|
801 | } |
---|
802 | } |
---|
803 | |
---|
804 | // =================================================================== |
---|
805 | // =====[ UPDATE ]==================================================== |
---|
806 | // =================================================================== |
---|
807 | // Update when exception or load_miss |
---|
808 | if (internal_UPDATE_VAL and PORT_READ(in_UPDATE_ACK)) |
---|
809 | { |
---|
810 | log_printf(TRACE,Commit_unit,FUNCTION," * UPDATE"); |
---|
811 | |
---|
812 | // Change state |
---|
813 | entry_t * entry = _rob [internal_UPDATE_NUM_BANK].front(); |
---|
814 | |
---|
815 | switch (entry->state) |
---|
816 | { |
---|
817 | // case ROB_END_EXCEPTION_UPDATE : |
---|
818 | // { |
---|
819 | // entry->state = ROB_END_KO; |
---|
820 | // throw ERRORMORPHEO(FUNCTION,_("Moore : exception is not yet supported (Coming Soon).\n")); |
---|
821 | // break; |
---|
822 | // } |
---|
823 | case ROB_END_LOAD_MISS_UPDATE : |
---|
824 | { |
---|
825 | log_printf(TRACE,Commit_unit,FUNCTION," * ROB_END_LOAD_MISS_UPDATE"); |
---|
826 | |
---|
827 | entry->state = ROB_END_LOAD_MISS; |
---|
828 | break; |
---|
829 | } |
---|
830 | default : |
---|
831 | { |
---|
832 | throw ERRORMORPHEO(FUNCTION,_("Update : invalid state.\n")); |
---|
833 | break; |
---|
834 | } |
---|
835 | } |
---|
836 | } |
---|
837 | |
---|
838 | // =================================================================== |
---|
839 | // =====[ EVENT ]===================================================== |
---|
840 | // =================================================================== |
---|
841 | // for (uint32_t i=0; i < _param->_nb_front_end; ++i) |
---|
842 | // for (uint32_t j=0; j < _param->_nb_context[i]; ++j) |
---|
843 | // if (PORT_READ(in_EVENT_VAL [i][j]) and internal_EVENT_ACK [i][j]) |
---|
844 | // { |
---|
845 | // log_printf(TRACE,Commit_unit,FUNCTION," * EVENT [%d][%d]",i,j); |
---|
846 | |
---|
847 | // reg_PC_CURRENT [i][j] = PORT_READ(in_EVENT_ADDRESS [i][j]); |
---|
848 | // reg_PC_CURRENT_IS_DS [i][j] = PORT_READ(in_EVENT_IS_DS_TAKE [i][j]); // ?? |
---|
849 | // reg_PC_CURRENT_IS_DS_TAKE [i][j] = PORT_READ(in_EVENT_IS_DS_TAKE [i][j]); |
---|
850 | // reg_PC_NEXT [i][j] = PORT_READ(in_EVENT_ADDRESS_NEXT [i][j]); |
---|
851 | // // PORT_READ(in_EVENT_ADDRESS_NEXT_VAL [i][j]); |
---|
852 | // } |
---|
853 | |
---|
854 | // =================================================================== |
---|
855 | // =====[ DEPTH - HEAD ]============================================== |
---|
856 | // =================================================================== |
---|
857 | |
---|
858 | { |
---|
859 | bool EVENT_LAST [_param->_nb_front_end][_param->_max_nb_context]; |
---|
860 | for (uint32_t i=0; i<_param->_nb_front_end; i++) |
---|
861 | for (uint32_t j=0; j<_param->_nb_context [i]; j++) |
---|
862 | EVENT_LAST [i][j] = reg_EVENT_LAST [i][j]; |
---|
863 | |
---|
864 | // Read all instruction of all top bank |
---|
865 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
---|
866 | { |
---|
867 | uint32_t num_bank = (reg_NUM_BANK_HEAD+i)%_param->_nb_bank; |
---|
868 | |
---|
869 | // Test if have an instruction |
---|
870 | if (not _rob[num_bank].empty()) |
---|
871 | { |
---|
872 | // Scan all instruction in windows and test if instruction is speculative |
---|
873 | entry_t * entry = _rob [num_bank].front(); |
---|
874 | |
---|
875 | Tcontext_t front_end_id = entry->front_end_id; |
---|
876 | Tcontext_t context_id = entry->context_id ; |
---|
877 | |
---|
878 | // scan while last event instruction is not retire |
---|
879 | if (EVENT_LAST [front_end_id][context_id] == false) |
---|
880 | { |
---|
881 | // Read information |
---|
882 | rob_state_t state = entry->state; |
---|
883 | Tdepth_t depth = entry->depth; |
---|
884 | |
---|
885 | Tdepth_t depth_min = (_param->_have_port_depth)?PORT_READ(in_DEPTH_MIN[front_end_id][context_id]):0; |
---|
886 | Tdepth_t depth_max = (_param->_have_port_depth)?PORT_READ(in_DEPTH_MAX[front_end_id][context_id]):0; |
---|
887 | Tcontrol_t depth_full = PORT_READ(in_DEPTH_FULL [front_end_id][context_id]); |
---|
888 | |
---|
889 | // is a valid instruction ? |
---|
890 | // If DEPTH_CURRENT : |
---|
891 | // equal at DEPTH_MIN -> not speculative |
---|
892 | // not include ]DEPTH_MIN:DEPTH_MAX] -> previous branch miss |
---|
893 | // include ]DEPTH_MIN:DEPTH_MAX] -> speculative |
---|
894 | |
---|
895 | // All case |
---|
896 | // ....... min ...X... max ....... OK |
---|
897 | // ....... min ....... max ...X... KO |
---|
898 | // ...X... min ....... max ....... KO |
---|
899 | // ....... max ....... min ...X... OK |
---|
900 | // ...X... max ....... min ....... OK |
---|
901 | // ....... max ...X... min ....... KO |
---|
902 | |
---|
903 | bool flush = ((reg_EVENT_STATE [front_end_id][context_id] == COMMIT_EVENT_STATE_EVENT) or |
---|
904 | (reg_EVENT_STATE [front_end_id][context_id] == COMMIT_EVENT_STATE_WAIT_DECOD) or |
---|
905 | (reg_EVENT_STATE [front_end_id][context_id] == COMMIT_EVENT_STATE_WAIT_END)); |
---|
906 | bool speculative = entry->speculative and not (depth == depth_min); |
---|
907 | Tcontrol_t is_valid = ((not speculative or |
---|
908 | (speculative and (depth_full or // all is valid |
---|
909 | ((depth_min <= depth_max)? // test if depth is overflow |
---|
910 | ((depth >= depth_min) and (depth <=depth_max)): |
---|
911 | ((depth >= depth_min) or (depth <=depth_max)))))) |
---|
912 | and not flush); // no event |
---|
913 | |
---|
914 | //Tcontrol_t is_valid = ((depth == depth_min) and not flush); |
---|
915 | |
---|
916 | log_printf(TRACE,Commit_unit,FUNCTION," * HEAD [%d] - %d",num_bank,((entry->ptr << _param->_shift_num_slot) | num_bank)); |
---|
917 | |
---|
918 | log_printf(TRACE,Commit_unit,FUNCTION," * is_valid : %d ((depth == depth_min) and not flush)",is_valid); |
---|
919 | log_printf(TRACE,Commit_unit,FUNCTION," * depth : %d",depth ); |
---|
920 | log_printf(TRACE,Commit_unit,FUNCTION," * depth_min : %d",depth_min); |
---|
921 | log_printf(TRACE,Commit_unit,FUNCTION," * depth_max : %d",depth_max); |
---|
922 | log_printf(TRACE,Commit_unit,FUNCTION," * depth_full : %d",depth_full); |
---|
923 | log_printf(TRACE,Commit_unit,FUNCTION," * speculative : %d",speculative); |
---|
924 | log_printf(TRACE,Commit_unit,FUNCTION," * flush : %d",flush); |
---|
925 | |
---|
926 | //------------------------------------------------------ |
---|
927 | // test if instruction is miss speculative |
---|
928 | //------------------------------------------------------ |
---|
929 | if (not is_valid) |
---|
930 | { |
---|
931 | // Change state |
---|
932 | switch (state) |
---|
933 | { |
---|
934 | case ROB_BRANCH_WAIT_END : {state = ROB_EVENT_WAIT_END; break;} |
---|
935 | case ROB_BRANCH_COMPLETE : {state = ROB_END_MISS ; break;} |
---|
936 | case ROB_END_BRANCH_MISS : |
---|
937 | case ROB_END_BRANCH_MISS_SPECULATIVE : {state = ROB_END_MISS ; break;} |
---|
938 | case ROB_END_LOAD_MISS_UPDATE : |
---|
939 | case ROB_END_LOAD_MISS : |
---|
940 | case ROB_END_LOAD_MISS_SPECULATIVE : {state = ROB_END_MISS ; break;} |
---|
941 | case ROB_STORE_OK : {state = ROB_STORE_KO ; break;} |
---|
942 | case ROB_STORE_WAIT_END_OK : {state = ROB_STORE_WAIT_END_KO; break;} |
---|
943 | case ROB_STORE_OK_WAIT_END : {state = ROB_STORE_KO_WAIT_END; break;} |
---|
944 | case ROB_OTHER_WAIT_END : {state = ROB_EVENT_WAIT_END; break;} |
---|
945 | case ROB_END_OK : |
---|
946 | case ROB_END_OK_SPECULATIVE : {state = ROB_END_MISS ; break;} |
---|
947 | case ROB_END_KO : |
---|
948 | case ROB_END_KO_SPECULATIVE : {state = ROB_END_MISS ; break;} |
---|
949 | case ROB_END_EXCEPTION_UPDATE : |
---|
950 | case ROB_END_EXCEPTION : |
---|
951 | case ROB_END_EXCEPTION_WAIT_HEAD : {state = ROB_END_MISS ; break;} |
---|
952 | |
---|
953 | // don't change state -> wait |
---|
954 | case ROB_STORE_WAIT_END_KO : {break;} |
---|
955 | case ROB_STORE_KO : {break;} |
---|
956 | case ROB_STORE_KO_WAIT_END : {break;} |
---|
957 | case ROB_STORE_EVENT : {break;} |
---|
958 | case ROB_EVENT_WAIT_END : {break;} |
---|
959 | case ROB_END_MISS : {break;} |
---|
960 | case ROB_END : {break;} |
---|
961 | |
---|
962 | // can't have miss speculation -> invalid state |
---|
963 | default : |
---|
964 | { |
---|
965 | throw ERRORMORPHEO(FUNCTION,toString(_("Miss Speculation : Invalide state : %s.\n"),toString(state).c_str())); |
---|
966 | break; |
---|
967 | } |
---|
968 | } |
---|
969 | } |
---|
970 | |
---|
971 | //------------------------------------------------------ |
---|
972 | // test if instruction is not speculative |
---|
973 | //------------------------------------------------------ |
---|
974 | entry->speculative = speculative; |
---|
975 | // if (entry->depth == depth_min) |
---|
976 | // test if instruction is speculative (depth != depth_min) |
---|
977 | if (not speculative) |
---|
978 | { |
---|
979 | switch (state) |
---|
980 | { |
---|
981 | case ROB_END_OK_SPECULATIVE : {state = ROB_END_OK ; break;} |
---|
982 | case ROB_END_KO_SPECULATIVE : {state = ROB_END_KO ; break;} |
---|
983 | case ROB_END_BRANCH_MISS_SPECULATIVE : {state = ROB_END_BRANCH_MISS ; break;} |
---|
984 | case ROB_END_LOAD_MISS_SPECULATIVE : {state = ROB_END_LOAD_MISS_UPDATE ; break;} |
---|
985 | default : {break;} // else, no change |
---|
986 | } |
---|
987 | } |
---|
988 | |
---|
989 | //------------------------------------------------------ |
---|
990 | // test if instruction wait head and is the top of rob |
---|
991 | //------------------------------------------------------ |
---|
992 | // TODO : retire OOO |
---|
993 | if (i == 0) |
---|
994 | { |
---|
995 | switch (state) |
---|
996 | { |
---|
997 | // case ROB_STORE_WAIT_HEAD_OK : {state = ROB_STORE_HEAD_OK; break;} |
---|
998 | case ROB_END_EXCEPTION_WAIT_HEAD : {state = ROB_END_EXCEPTION_UPDATE; break;} |
---|
999 | default : {break;} // else, no change |
---|
1000 | } |
---|
1001 | } |
---|
1002 | |
---|
1003 | // Write new state |
---|
1004 | entry->state = state; |
---|
1005 | |
---|
1006 | // Test if this instruction is the last of event |
---|
1007 | if ((reg_EVENT_STATE [front_end_id][context_id] != COMMIT_EVENT_STATE_NO_EVENT) and |
---|
1008 | (reg_EVENT_LAST_NUM_BANK [front_end_id][context_id] == num_bank ) and |
---|
1009 | (reg_EVENT_LAST_NUM_PTR [front_end_id][context_id] == entry->ptr )) |
---|
1010 | { |
---|
1011 | log_printf(TRACE,Commit_unit,FUNCTION," * Stop Scan !!!"); |
---|
1012 | |
---|
1013 | EVENT_LAST [front_end_id][context_id] = true; |
---|
1014 | } |
---|
1015 | } |
---|
1016 | } |
---|
1017 | } |
---|
1018 | } |
---|
1019 | |
---|
1020 | |
---|
1021 | |
---|
1022 | #ifdef STATISTICS |
---|
1023 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
---|
1024 | if (usage_is_set(_usage,USE_STATISTICS)) |
---|
1025 | *(_stat_bank_nb_inst [i]) += _rob[i].size(); |
---|
1026 | #endif |
---|
1027 | } |
---|
1028 | |
---|
1029 | // =================================================================== |
---|
1030 | // =====[ OTHER ]===================================================== |
---|
1031 | // =================================================================== |
---|
1032 | |
---|
1033 | #if (DEBUG >= DEBUG_TRACE) and (DEBUG_Commit_unit == true) |
---|
1034 | { |
---|
1035 | log_printf(TRACE,Commit_unit,FUNCTION," * Dump ROB (Re-Order-Buffer)"); |
---|
1036 | log_printf(TRACE,Commit_unit,FUNCTION," * num_bank_head : %d",reg_NUM_BANK_HEAD); |
---|
1037 | log_printf(TRACE,Commit_unit,FUNCTION," * num_bank_tail : %d",reg_NUM_BANK_TAIL); |
---|
1038 | log_printf(TRACE,Commit_unit,FUNCTION," * num_ptr_tail : %d",reg_NUM_PTR_TAIL ); |
---|
1039 | |
---|
1040 | for (uint32_t i=0; i<_param->_nb_front_end; i++) |
---|
1041 | for (uint32_t j=0; j<_param->_nb_context [i]; j++) |
---|
1042 | { |
---|
1043 | log_printf(TRACE,Commit_unit,FUNCTION," * [%d][%d] - %d",i,j,_param->_translate_num_context_to_num_thread [i][j]); |
---|
1044 | log_printf(TRACE,Commit_unit,FUNCTION," * EVENT_STATE : %s - %s",toString(reg_EVENT_STATE [i][j]).c_str(),toString(commit_event_state_to_event_state(reg_EVENT_STATE [i][j])).c_str()); |
---|
1045 | // log_printf(TRACE,Commit_unit,FUNCTION," * EVENT_FLUSH : %d",reg_EVENT_FLUSH [i][j]); |
---|
1046 | log_printf(TRACE,Commit_unit,FUNCTION," * EVENT_STOP : %d",reg_EVENT_STOP [i][j]); |
---|
1047 | // log_printf(TRACE,Commit_unit,FUNCTION," * EVENT : %d (bank %d, ptr %d)",((reg_EVENT_NUM_PTR [i][j] << _param->_shift_num_slot) | reg_EVENT_NUM_BANK [i][j]), reg_EVENT_NUM_BANK [i][j],reg_EVENT_NUM_PTR [i][j]); |
---|
1048 | log_printf(TRACE,Commit_unit,FUNCTION," * EVENT_CAN_RESTART : %d",reg_EVENT_CAN_RESTART [i][j]); |
---|
1049 | log_printf(TRACE,Commit_unit,FUNCTION," * EVENT_PACKET : %d",reg_EVENT_PACKET[i][j]); |
---|
1050 | log_printf(TRACE,Commit_unit,FUNCTION," * EVENT_LAST : %d",reg_EVENT_LAST [i][j]); |
---|
1051 | log_printf(TRACE,Commit_unit,FUNCTION," * EVENT_LAST : %d (bank %d, ptr %d)",((reg_EVENT_LAST_NUM_PTR [i][j] << _param->_shift_num_slot) | reg_EVENT_LAST_NUM_BANK [i][j]), reg_EVENT_LAST_NUM_BANK [i][j],reg_EVENT_LAST_NUM_PTR [i][j]); |
---|
1052 | log_printf(TRACE,Commit_unit,FUNCTION," * NB_INST_ALL : %d",reg_NB_INST_COMMIT_ALL[i][j]); |
---|
1053 | log_printf(TRACE,Commit_unit,FUNCTION," * NB_INST_MEM : %d",reg_NB_INST_COMMIT_MEM[i][j]); |
---|
1054 | log_printf(TRACE,Commit_unit,FUNCTION," * PC_CURRENT : %.8x (%.8x) - %d %d",reg_PC_CURRENT [i][j],reg_PC_CURRENT [i][j]<<2, reg_PC_CURRENT_IS_DS [i][j], reg_PC_CURRENT_IS_DS_TAKE [i][j]); |
---|
1055 | log_printf(TRACE,Commit_unit,FUNCTION," * PC_NEXT : %.8x (%.8x)",reg_PC_NEXT [i][j],reg_PC_NEXT [i][j]<<2); |
---|
1056 | } |
---|
1057 | |
---|
1058 | std::list<entry_t*>::iterator iter [_param->_nb_bank]; |
---|
1059 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
---|
1060 | { |
---|
1061 | uint32_t num_bank = (reg_NUM_BANK_HEAD+i)%_param->_nb_bank; |
---|
1062 | // log_printf(TRACE,Commit_unit,FUNCTION," * Bank [%d] size : %d, ptr : %d",num_bank,(int)_rob[num_bank].size(), reg_BANK_PTR [i]); |
---|
1063 | |
---|
1064 | iter [num_bank] = _rob[num_bank].begin(); |
---|
1065 | } |
---|
1066 | |
---|
1067 | bool all_empty = false; |
---|
1068 | while (not all_empty) |
---|
1069 | { |
---|
1070 | all_empty = true; |
---|
1071 | |
---|
1072 | for (uint32_t i=0; i<_param->_nb_bank; i++) |
---|
1073 | { |
---|
1074 | uint32_t num_bank = (reg_NUM_BANK_HEAD+i)%_param->_nb_bank; |
---|
1075 | |
---|
1076 | std::list<entry_t*>::iterator it = iter[num_bank]; |
---|
1077 | if (it != _rob[num_bank].end()) |
---|
1078 | { |
---|
1079 | all_empty = false; |
---|
1080 | |
---|
1081 | log_printf(TRACE,Commit_unit,FUNCTION," [%.4d][%.4d] (%.4d) %.4d %.4d %.4d %.4d, %.3d %.3d, %.1d, %.1d %.4d, %.1d %.4d, %s", |
---|
1082 | num_bank , |
---|
1083 | (*it)->ptr , |
---|
1084 | (((*it)->ptr << _param->_shift_num_slot) | num_bank), |
---|
1085 | (*it)->front_end_id , |
---|
1086 | (*it)->context_id , |
---|
1087 | (*it)->rename_unit_id , |
---|
1088 | (*it)->depth , |
---|
1089 | (*it)->type , |
---|
1090 | (*it)->operation , |
---|
1091 | (*it)->is_delay_slot , |
---|
1092 | (*it)->use_store_queue , |
---|
1093 | (*it)->store_queue_ptr_write , |
---|
1094 | (*it)->use_load_queue , |
---|
1095 | (*it)->load_queue_ptr_write , |
---|
1096 | toString((*it)->state).c_str() ); |
---|
1097 | log_printf(TRACE,Commit_unit,FUNCTION," %.1d %.2d %.6d, %.1d %.2d %.6d, %.1d %.1d %.6d, %.1d %.2d %.6d %.6d, %.1d %.1d %.6d %.6d ", |
---|
1098 | (*it)->read_ra , |
---|
1099 | (*it)->num_reg_ra_log , |
---|
1100 | (*it)->num_reg_ra_phy , |
---|
1101 | (*it)->read_rb , |
---|
1102 | (*it)->num_reg_rb_log , |
---|
1103 | (*it)->num_reg_rb_phy , |
---|
1104 | (*it)->read_rc , |
---|
1105 | (*it)->num_reg_rc_log , |
---|
1106 | (*it)->num_reg_rc_phy , |
---|
1107 | (*it)->write_rd , |
---|
1108 | (*it)->num_reg_rd_log , |
---|
1109 | (*it)->num_reg_rd_phy_old , |
---|
1110 | (*it)->num_reg_rd_phy_new , |
---|
1111 | (*it)->write_re , |
---|
1112 | (*it)->num_reg_re_log , |
---|
1113 | (*it)->num_reg_re_phy_old , |
---|
1114 | (*it)->num_reg_re_phy_new ); |
---|
1115 | |
---|
1116 | log_printf(TRACE,Commit_unit,FUNCTION," %.2d %.2d %.1d %.1d %.1d - %.8x (%.8x) %.8x (%.8x)", |
---|
1117 | (*it)->exception_use , |
---|
1118 | (*it)->exception , |
---|
1119 | (*it)->flags , |
---|
1120 | (*it)->no_sequence , |
---|
1121 | (*it)->speculative , |
---|
1122 | (*it)->address , |
---|
1123 | (*it)->address<<2 , |
---|
1124 | (*it)->address_next , |
---|
1125 | (*it)->address_next<<2 |
---|
1126 | ); |
---|
1127 | |
---|
1128 | iter [num_bank] ++; |
---|
1129 | } |
---|
1130 | } |
---|
1131 | } |
---|
1132 | } |
---|
1133 | #endif |
---|
1134 | |
---|
1135 | #ifdef DEBUG_TEST |
---|
1136 | { |
---|
1137 | uint32_t x=reg_NUM_BANK_HEAD; |
---|
1138 | if (not _rob[x].empty()) |
---|
1139 | { |
---|
1140 | entry_t * entry = _rob [x].front(); |
---|
1141 | |
---|
1142 | if (false |
---|
1143 | // or (entry->state == ROB_EMPTY ) |
---|
1144 | // or (entry->state == ROB_BRANCH_WAIT_END ) |
---|
1145 | // or (entry->state == ROB_BRANCH_COMPLETE ) |
---|
1146 | // or (entry->state == ROB_STORE_WAIT_HEAD_OK ) |
---|
1147 | // //or (entry->state == ROB_STORE_WAIT_HEAD_KO ) |
---|
1148 | // or (entry->state == ROB_STORE_HEAD_OK ) |
---|
1149 | // or (entry->state == ROB_STORE_HEAD_KO ) |
---|
1150 | // or (entry->state == ROB_OTHER_WAIT_END ) |
---|
1151 | // or (entry->state == ROB_EVENT_WAIT_END ) |
---|
1152 | // or (entry->state == ROB_END_OK_SPECULATIVE ) |
---|
1153 | or (entry->state == ROB_END_OK ) |
---|
1154 | // or (entry->state == ROB_END_KO_SPECULATIVE ) |
---|
1155 | // or (entry->state == ROB_END_KO ) |
---|
1156 | // or (entry->state == ROB_END_BRANCH_MISS_SPECULATIVE) |
---|
1157 | or (entry->state == ROB_END_BRANCH_MISS ) |
---|
1158 | // or (entry->state == ROB_END_LOAD_MISS_SPECULATIVE ) |
---|
1159 | // or (entry->state == ROB_END_LOAD_MISS_UPDATE ) |
---|
1160 | or (entry->state == ROB_END_LOAD_MISS ) |
---|
1161 | // or (entry->state == ROB_END_MISS ) |
---|
1162 | // or (entry->state == ROB_END_EXCEPTION_WAIT_HEAD ) |
---|
1163 | // or (entry->state == ROB_END_EXCEPTION_UPDATE ) |
---|
1164 | // or (entry->state == ROB_END_EXCEPTION ) |
---|
1165 | ) |
---|
1166 | if (entry->address != reg_PC_CURRENT[entry->front_end_id][entry->context_id]) |
---|
1167 | throw ERRORMORPHEO(FUNCTION,toString(_("Rob top address (0x%x) is different of reg_PC_CURRENT[%d][%d] (0x%x).\n"), |
---|
1168 | entry->address, |
---|
1169 | entry->front_end_id, |
---|
1170 | entry->context_id, |
---|
1171 | reg_PC_CURRENT[entry->front_end_id][entry->context_id])); |
---|
1172 | } |
---|
1173 | } |
---|
1174 | #endif |
---|
1175 | |
---|
1176 | #if defined(STATISTICS) or defined(VHDL_TESTBENCH) |
---|
1177 | end_cycle (); |
---|
1178 | #endif |
---|
1179 | |
---|
1180 | // Stop Condition |
---|
1181 | for (uint32_t i=0; i<_param->_nb_front_end; i++) |
---|
1182 | for (uint32_t j=0; j<_param->_nb_context [i]; j++) |
---|
1183 | if (_nb_cycle_idle [i][j] >= debug_idle_cycle) |
---|
1184 | throw ERRORMORPHEO(FUNCTION,toString(_("Thread [%d] is idle since %.0f cycles.\n"),_param->_translate_num_context_to_num_thread[i][j],_nb_cycle_idle [i][j])); |
---|
1185 | |
---|
1186 | log_end(Commit_unit,FUNCTION); |
---|
1187 | }; |
---|
1188 | |
---|
1189 | }; // end namespace commit_unit |
---|
1190 | }; // end namespace ooo_engine |
---|
1191 | }; // end namespace multi_ooo_engine |
---|
1192 | }; // end namespace core |
---|
1193 | |
---|
1194 | }; // end namespace behavioural |
---|
1195 | }; // end namespace morpheo |
---|
1196 | #endif |
---|