115 lines
5.0 KiB
C++
115 lines
5.0 KiB
C++
/*******************************************************************************
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* Copyright (C) 2017 - 2023, MINRES Technologies GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Contributors:
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* eyck@minres.com - initial API and implementation
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******************************************************************************/
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#include "cycle_estimate.h"
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#include <iss/plugin/calculator.h>
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#include <yaml-cpp/yaml.h>
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#include <fstream>
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#include <iss/arch_if.h>
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#include <util/logging.h>
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using namespace std;
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iss::plugin::cycle_estimate::cycle_estimate(string const& config_file_name)
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: instr_if(nullptr)
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, config_file_name(config_file_name) {}
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iss::plugin::cycle_estimate::~cycle_estimate() = default;
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bool iss::plugin::cycle_estimate::registration(const char* const version, vm_if& vm) {
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instr_if = vm.get_arch()->get_instrumentation_if();
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assert(instr_if && "No instrumentation interface available but callback executed");
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reg_base_ptr = reinterpret_cast<uint32_t*>(vm.get_arch()->get_regs_base_ptr());
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if(!instr_if)
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return false;
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const string core_name = instr_if->core_type_name();
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if(config_file_name.length() > 0) {
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std::ifstream is(config_file_name);
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if(is.is_open()) {
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try {
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auto root = YAML::LoadAll(is);
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if(root.size() != 1) {
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CPPLOG(ERR) << "Too many root nodes in YAML file " << config_file_name;
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}
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for(auto p : root[0]) {
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auto isa_subset = p.first;
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auto instructions = p.second;
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for(auto const& instr : instructions) {
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auto idx = instr.second["index"].as<unsigned>();
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if(delays.size() <= idx)
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delays.resize(idx + 1);
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auto& res = delays[idx];
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res.is_branch = instr.second["branch"].as<bool>();
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auto delay = instr.second["delay"];
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if(delay.IsSequence()) {
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res.not_taken = delay[0].as<uint64_t>();
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res.taken = delay[1].as<uint64_t>();
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} else {
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try {
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res.not_taken = delay.as<uint64_t>();
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res.taken = res.not_taken;
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} catch(const YAML::BadConversion& e) {
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res.f = iss::plugin::calculator(reg_base_ptr, delay.as<std::string>());
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}
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}
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}
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}
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} catch(YAML::ParserException& e) {
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CPPLOG(ERR) << "Could not parse input file " << config_file_name << ", reason: " << e.what();
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return false;
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}
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} else {
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CPPLOG(ERR) << "Could not open input file " << config_file_name;
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return false;
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}
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}
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return true;
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}
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void iss::plugin::cycle_estimate::callback(instr_info_t instr_info) {
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size_t instr_id = instr_info.instr_id;
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auto& entry = instr_id < delays.size() ? delays[instr_id] : illegal_desc;
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if(instr_info.phase_id == PRE_SYNC) {
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if(entry.f)
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current_delay = entry.f(instr_if->get_instr_word());
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} else {
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if(!entry.f)
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current_delay = instr_if->is_branch_taken() ? entry.taken : entry.not_taken;
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if(current_delay > 1)
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instr_if->update_last_instr_cycles(current_delay);
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current_delay = 1;
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}
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}
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