| 906 | // to be as optimized as possible. This is the heart of avida. |
| 907 | |
| 908 | bool cHardwareCPU::SingleProcess(cAvidaContext& ctx, bool speculative) |
| 909 | { |
| 910 | assert(!speculative || (speculative && !m_thread_slicing_parallel)); |
| 911 | |
| 912 | int last_IP_pos = getIP().GetPosition(); |
| 913 | |
| 914 | // Mark this organism as running... |
| 915 | m_organism->SetRunning(true); |
| 916 | |
| 917 | if (!speculative && m_spec_die) { |
| 918 | m_organism->Die(ctx); |
| 919 | m_organism->SetRunning(false); |
| 920 | return false; |
| 921 | } |
| 922 | |
| 923 | cPhenotype& phenotype = m_organism->GetPhenotype(); |
| 924 | |
| 925 | // First instruction - check whether we should be starting at a promoter, when enabled. |
| 926 | if (phenotype.GetCPUCyclesUsed() == 0 && m_promoters_enabled) Inst_Terminate(ctx); |
| 927 | |
| 928 | // Count the cpu cycles used |
| 929 | phenotype.IncCPUCyclesUsed(); |
| 930 | if (!m_world->GetConfig().NO_CPU_CYCLE_TIME.Get()) phenotype.IncTimeUsed(); |
| 931 | |
| 932 | int num_threads = m_threads.GetSize(); |
| 933 | |
| 934 | // If we have threads turned on and we executed each thread in a single |
| 935 | // timestep, adjust the number of instructions executed accordingly. |
| 936 | int num_inst_exec = m_thread_slicing_parallel ? num_threads : 1; |
| 937 | |
| 938 | // bool isInterruptEnabled(false); |
| 939 | // if (m_world->GetConfig().ACTIVE_MESSAGES_ENABLED.Get() == 1) |
| 940 | // isInterruptEnabled = true; |
| 941 | |
| 942 | for (int i = 0; i < num_inst_exec; i++) { |
| 943 | // Setup the hardware for the next instruction to be executed. |
| 944 | int last_thread = m_cur_thread; |
| 945 | |
| 946 | m_cur_thread++; |
| 947 | |
| 948 | if (m_cur_thread >= num_threads) m_cur_thread = 0; |
| 949 | |
| 950 | m_advance_ip = true; |
| 951 | cHeadCPU& ip = m_threads[m_cur_thread].heads[nHardware::HEAD_IP]; |
| 952 | ip.Adjust(); |
| 953 | |
| 954 | |
| 955 | // Print the status of this CPU at each step... |
| 956 | if (m_tracer) m_tracer->TraceHardware(ctx, *this); |
| 957 | |
| 958 | // Find the instruction to be executed |
| 959 | const Instruction cur_inst = ip.GetInst(); |
| 960 | |
| 961 | if (speculative && (m_spec_die || m_inst_set->ShouldStall(cur_inst))) { |
| 962 | // Speculative instruction reject, flush and return |
| 963 | m_cur_thread = last_thread; |
| 964 | phenotype.DecCPUCyclesUsed(); |
| 965 | if (!m_no_cpu_cycle_time) phenotype.IncTimeUsed(-1); |
nothing calls this directly
no test coverage detected