mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-23 13:30:02 +00:00
299 lines
7.0 KiB
C++
299 lines
7.0 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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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, version 2.0.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "ppsspp_config.h"
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#if PPSSPP_ARCH(ARM) || PPSSPP_ARCH(ARM64)
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#include <ctype.h>
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#include "Common.h"
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#include "CPUDetect.h"
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#include "StringUtils.h"
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#include "FileUtil.h"
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// Only Linux platforms have /proc/cpuinfo
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#if PPSSPP_PLATFORM(LINUX)
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const char procfile[] = "/proc/cpuinfo";
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// https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu
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const char syscpupresentfile[] = "/sys/devices/system/cpu/present";
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std::string GetCPUString() {
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std::string cpu_string;
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std::fstream file;
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if (File::OpenCPPFile(file, procfile, std::ios::in)) {
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std::string line, marker = "Hardware\t: ";
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while (std::getline(file, line)) {
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if (line.find(marker) != std::string::npos) {
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cpu_string = line.substr(marker.length());
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}
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}
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}
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if (cpu_string.empty())
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cpu_string = "Unknown";
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else if (cpu_string.back() == '\n')
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cpu_string.pop_back(); // Drop the new-line character
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return cpu_string;
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}
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std::string GetCPUBrandString() {
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std::string brand_string;
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std::fstream file;
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if (File::OpenCPPFile(file, procfile, std::ios::in)) {
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std::string line, marker = "Processor\t: ";
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while (std::getline(file, line)) {
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if (line.find(marker) != std::string::npos) {
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brand_string = line.substr(marker.length());
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if (brand_string.length() != 0 && !isdigit(brand_string[0])) {
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break;
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}
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}
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}
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}
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if (brand_string.empty())
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brand_string = "Unknown";
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else if (brand_string.back() == '\n')
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brand_string.pop_back(); // Drop the new-line character
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return brand_string;
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}
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unsigned char GetCPUImplementer()
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{
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std::string line, marker = "CPU implementer\t: ";
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unsigned char implementer = 0;
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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{
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line = line.substr(marker.length());
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sscanf(line.c_str(), "0x%02hhx", &implementer);
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break;
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}
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}
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return implementer;
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}
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unsigned short GetCPUPart()
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{
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std::string line, marker = "CPU part\t: ";
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unsigned short part = 0;
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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{
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line = line.substr(marker.length());
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sscanf(line.c_str(), "0x%03hx", &part);
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break;
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}
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}
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return part;
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}
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bool CheckCPUFeature(const std::string& feature)
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{
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std::string line, marker = "Features\t: ";
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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{
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std::stringstream line_stream(line);
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std::string token;
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while (std::getline(line_stream, token, ' '))
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{
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if (token == feature)
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return true;
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}
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}
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}
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return false;
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}
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int GetCoreCount()
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{
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std::string line, marker = "processor\t: ";
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int cores = 1;
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std::fstream file;
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if (File::OpenCPPFile(file, syscpupresentfile, std::ios::in))
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{
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int low, high, found;
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std::getline(file, line);
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found = sscanf(line.c_str(), "%d-%d", &low, &high);
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if (found == 1)
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return 1;
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if (found == 2)
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return high - low + 1;
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}
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 1;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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++cores;
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}
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return cores;
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}
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#endif
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CPUInfo cpu_info;
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CPUInfo::CPUInfo() {
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Detect();
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}
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// Detects the various cpu features
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void CPUInfo::Detect()
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{
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// Set some defaults here
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HTT = false;
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#if PPSSPP_ARCH(ARM64)
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OS64bit = true;
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CPU64bit = true;
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Mode64bit = true;
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#else
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OS64bit = false;
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CPU64bit = false;
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Mode64bit = false;
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#endif
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vendor = VENDOR_ARM;
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// Get the information about the CPU
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#if !PPSSPP_PLATFORM(LINUX)
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bool isVFP3 = false;
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bool isVFP4 = false;
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#if PPSSPP_PLATFORM(IOS)
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isVFP3 = true;
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// Check for swift arch (VFP4)
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#ifdef __ARM_ARCH_7S__
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isVFP4 = true;
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#endif
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strcpy(brand_string, "Apple A");
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num_cores = 2;
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#elif PPSSPP_PLATFORM(UWP)
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strcpy(brand_string, "Unknown");
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isVFP3 = true;
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isVFP4 = false;
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SYSTEM_INFO sysInfo;
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GetSystemInfo(&sysInfo);
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num_cores = sysInfo.dwNumberOfProcessors;
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#else // !PPSSPP_PLATFORM(IOS)
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strcpy(brand_string, "Unknown");
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num_cores = 1;
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#endif
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strncpy(cpu_string, brand_string, sizeof(cpu_string));
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// Hardcode this for now
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bSwp = true;
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bHalf = true;
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bThumb = false;
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bFastMult = true;
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bVFP = true;
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bEDSP = true;
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bThumbEE = isVFP3;
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bNEON = isVFP3;
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bVFPv3 = isVFP3;
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bTLS = true;
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bVFPv4 = isVFP4;
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bIDIVa = isVFP4;
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bIDIVt = isVFP4;
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bFP = false;
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bASIMD = false;
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#else // PPSSPP_PLATFORM(LINUX)
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strncpy(cpu_string, GetCPUString().c_str(), sizeof(cpu_string));
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strncpy(brand_string, GetCPUBrandString().c_str(), sizeof(brand_string));
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bSwp = CheckCPUFeature("swp");
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bHalf = CheckCPUFeature("half");
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bThumb = CheckCPUFeature("thumb");
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bFastMult = CheckCPUFeature("fastmult");
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bVFP = CheckCPUFeature("vfp");
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bEDSP = CheckCPUFeature("edsp");
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bThumbEE = CheckCPUFeature("thumbee");
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bNEON = CheckCPUFeature("neon");
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bVFPv3 = CheckCPUFeature("vfpv3");
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bTLS = CheckCPUFeature("tls");
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bVFPv4 = CheckCPUFeature("vfpv4");
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bIDIVa = CheckCPUFeature("idiva");
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bIDIVt = CheckCPUFeature("idivt");
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// Qualcomm Krait supports IDIVA but it doesn't report it. Check for krait (0x4D = Plus, 0x6F = Pro).
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unsigned short CPUPart = GetCPUPart();
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if (GetCPUImplementer() == 0x51 && (CPUPart == 0x4D || CPUPart == 0x6F))
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bIDIVa = bIDIVt = true;
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// These two require ARMv8 or higher
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bFP = CheckCPUFeature("fp");
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bASIMD = CheckCPUFeature("asimd");
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num_cores = GetCoreCount();
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#endif
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#if PPSSPP_ARCH(ARM64)
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// Whether the above detection failed or not, on ARM64 we do have ASIMD/NEON.
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bNEON = true;
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bASIMD = true;
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#endif
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}
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// Turn the cpu info into a string we can show
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std::string CPUInfo::Summarize()
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{
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std::string sum;
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if (num_cores == 1)
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sum = StringFromFormat("%s, %i core", cpu_string, num_cores);
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else
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sum = StringFromFormat("%s, %i cores", cpu_string, num_cores);
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if (bSwp) sum += ", SWP";
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if (bHalf) sum += ", Half";
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if (bThumb) sum += ", Thumb";
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if (bFastMult) sum += ", FastMult";
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if (bEDSP) sum += ", EDSP";
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if (bThumbEE) sum += ", ThumbEE";
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if (bTLS) sum += ", TLS";
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if (bVFP) sum += ", VFP";
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if (bVFPv3) sum += ", VFPv3";
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if (bVFPv4) sum += ", VFPv4";
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if (bNEON) sum += ", NEON";
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if (bIDIVa) sum += ", IDIVa";
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if (bIDIVt) sum += ", IDIVt";
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if (CPU64bit) sum += ", 64-bit";
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return sum;
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}
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#endif // PPSSPP_ARCH(ARM) || PPSSPP_ARCH(ARM64)
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