mirror of
https://github.com/dingusdev/dingusppc.git
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111 lines
4.1 KiB
C++
111 lines
4.1 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-20 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <chrono>
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#include <cinttypes>
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#include <ctime>
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#include <iostream>
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#include <interpreter_loop.h>
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#include <thirdparty/loguru/loguru.hpp>
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#include <cpu/ppc/ppcemu.h>
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std::chrono::high_resolution_clock::time_point global; // global timer
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std::chrono::high_resolution_clock::time_point cuda_timer; // updates every 11 ms
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std::chrono::high_resolution_clock::time_point disp_timer; // updates every 16 ms
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using namespace std;
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const uint64_t cuda_update = 11000;
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const uint64_t display_update = 16667;
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bool cuda_priority = 0;
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bool disp_priority = 0;
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uint64_t elapsed_times[3] = {0}; // Elapsed time to reach a cycle (for display)
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uint64_t routine_bench[3] = {0}; // Estimated time (in microseconds) to cycle through functions
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uint64_t routine_runtime[3] = {0, cuda_update, display_update}; // Time to elapse before execution
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enum general_routine_timepoint { OVERALL_UPDATE_TIME, CUDA_UPDATE_TIME, DISPLAY_UPDATE_TIME };
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void round_robin_bench() {
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// Benchmark how much time elapses during a minimal CPU block
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std::chrono::high_resolution_clock::time_point dummy = std::chrono::high_resolution_clock::now();
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for (int i = 0; i < 4096; i++) {
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ppc_ori(); //execute NOPs as a basic test
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}
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std::chrono::high_resolution_clock::time_point dummy2 = std::chrono::high_resolution_clock::now();
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routine_bench[OVERALL_UPDATE_TIME] =
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std::chrono::duration_cast<std::chrono::microseconds>(dummy2 - dummy).count();
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std::cout << "Initial test: " << routine_bench[OVERALL_UPDATE_TIME] << endl;
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}
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void interpreter_update_counters() {
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std::chrono::high_resolution_clock::time_point end = std::chrono::high_resolution_clock::now();
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elapsed_times[OVERALL_UPDATE_TIME] =
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std::chrono::duration_cast<std::chrono::microseconds>(end - global).count();
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elapsed_times[CUDA_UPDATE_TIME] =
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std::chrono::duration_cast<std::chrono::microseconds>(end - cuda_timer).count();
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elapsed_times[DISPLAY_UPDATE_TIME] =
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std::chrono::duration_cast<std::chrono::microseconds>(end - disp_timer).count();
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// Calculate if the threshold for updating a time-critical section has reached or is about to be reached
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if ((elapsed_times[CUDA_UPDATE_TIME] + routine_bench[OVERALL_UPDATE_TIME]) >=
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routine_runtime[CUDA_UPDATE_TIME]) {
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cuda_priority = true;
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elapsed_times[CUDA_UPDATE_TIME] = 0;
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cuda_timer = end;
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}
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if ((elapsed_times[DISPLAY_UPDATE_TIME] + routine_bench[OVERALL_UPDATE_TIME]) >=
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routine_runtime[DISPLAY_UPDATE_TIME]) {
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disp_priority = true;
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elapsed_times[DISPLAY_UPDATE_TIME] = 0;
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disp_timer = end;
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}
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}
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void interpreter_main_loop() {
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// Round robin algorithm goes here
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round_robin_bench();
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global = std::chrono::high_resolution_clock::now();
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cuda_timer = global;
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disp_timer = global;
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for (;;) {
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if (cuda_priority) {
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LOG_F(9, "Placeholder for Cuda Update function!\n");
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cuda_priority = false;
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}
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if (disp_priority) {
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LOG_F(9, "Placeholder for Display Update function! \n");
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disp_priority = false;
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}
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ppc_exec();
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interpreter_update_counters();
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}
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} |