ext/mcpat/core.cc

56     : McPATComponent(_xml_data), icache(NULL), IB(NULL), BTB(NULL),
129          * BTB branch target buffer, accessed during IF stage. Virtually indexed and virtually tagged
133          * 1)  when BPT@ID stage finds out current is a taken branch while BTB missed
134          * 2)  When BPT@ID stage predicts differently than BTB
135          * 3)  When ID stage finds out current instruction is not a branch while BTB had a hit.(mark as invalid)
136          * 4)  when EXEU find out wrong target has been provided from BTB.
170         BTB = new ArrayST(xml_data, &interface_ip, "Branch Target Buffer",
173         area.set_area(area.get_area() + BTB->local_result.area);
2363         BTB->tdp_stats.reset();
2364         BTB->tdp_stats.readAc.access = core_params.predictionW;
2365         BTB->tdp_stats.writeAc.access = 0;
2366         BTB->rtp_stats.reset();
2367         BTB->rtp_stats.readAc.access = inst_fetch_stats.btb_read_accesses;
2368         BTB->rtp_stats.writeAc.access = inst_fetch_stats.btb_write_accesses;
2369         BTB->power_t.reset();
2370         BTB->power_t.readOp.dynamic += BTB->local_result.power.readOp.dynamic *
2371             BTB->tdp_stats.readAc.access +
2372             BTB->local_result.power.writeOp.dynamic *
2373             BTB->tdp_stats.writeAc.access;
2374         BTB->rt_power.reset();
2375         BTB->rt_power.readOp.dynamic +=
2376             BTB->local_result.power.readOp.dynamic *
2377             BTB->rtp_stats.readAc.access +
2378             BTB->local_result.power.writeOp.dynamic *
2379             BTB->rtp_stats.writeAc.access;
2432     if (BTB) {
2433         BTB->output_data.peak_dynamic_power =
2434             BTB->power_t.readOp.dynamic * clockRate;
2435         BTB->output_data.runtime_dynamic_energy = BTB->rt_power.readOp.dynamic;
2436         output_data += BTB->output_data;
2470         BTB->displayData(indent + 4, plevel);
3443         if (BTB) {
3444             delete BTB;
3445             BTB = NULL;