1/* 2 * Copyright (c) 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; --- 45 unchanged lines hidden (view full) --- 54 * them as their scheduled execution events complete. This limits units in this 55 * model to either have identical issue and op latencies, or 1 cycle issue 56 * latencies. 57 */ 58class FUPool : public SimObject 59{ 60 private: 61 /** Maximum op execution latencies, per op class. */ |
62 Cycles maxOpLatencies[Num_OpClasses]; |
63 /** Maximum issue latencies, per op class. */ |
64 Cycles maxIssueLatencies[Num_OpClasses]; |
65 66 /** Bitvector listing capabilities of this FU pool. */ 67 std::bitset<Num_OpClasses> capabilityList; 68 69 /** Bitvector listing which FUs are busy. */ 70 std::vector<bool> unitBusy; 71 72 /** List of units to be freed at the end of this cycle. */ --- 46 unchanged lines hidden (view full) --- 119 typedef FUPoolParams Params; 120 /** Constructs a FU pool. */ 121 FUPool(const Params *p); 122 ~FUPool(); 123 124 /** Annotates units that provide memory operations. Included only because 125 * old FU pool provided this function. 126 */ |
127 void annotateMemoryUnits(Cycles hit_latency); |
128 129 /** 130 * Gets a FU providing the requested capability. Will mark the unit as busy, 131 * but leaves the freeing of the unit up to the IEW stage. 132 * @param capability The capability requested. 133 * @return Returns -2 if the FU pool does not have the capability, -1 if 134 * there is no free FU, and the FU's index otherwise. 135 */ --- 7 unchanged lines hidden (view full) --- 143 144 /** Returns the total number of FUs. */ 145 int size() { return numFU; } 146 147 /** Debugging function used to dump FU information. */ 148 void dump(); 149 150 /** Returns the operation execution latency of the given capability. */ |
151 Cycles getOpLatency(OpClass capability) { |
152 return maxOpLatencies[capability]; 153 } 154 155 /** Returns the issue latency of the given capability. */ |
156 Cycles getIssueLatency(OpClass capability) { |
157 return maxIssueLatencies[capability]; 158 } 159 160 /** Switches out functional unit pool. */ 161 void switchOut(); 162 163 /** Takes over from another CPU's thread. */ 164 void takeOver(); 165}; 166 167#endif // __CPU_O3_FU_POOL_HH__ |