RISC-V CPU detect

CMakeLists.txt

@@ -430,6 +430,7 @@ set(CommonMIPS
 source_group(MIPS FILES ${CommonMIPS})
 
 set(CommonRISCV64
+	Common/RiscVCPUDetect.cpp
 	Core/MIPS/fake/FakeJit.cpp
 	Core/MIPS/fake/FakeJit.h
 )

Common/Common.vcxproj

@@ -898,6 +898,7 @@
     <ClCompile Include="Render\Text\draw_text_uwp.cpp" />
     <ClCompile Include="Render\Text\draw_text_win.cpp" />
     <ClCompile Include="LogReporting.cpp" />
+    <ClCompile Include="RiscVCPUDetect.cpp" />
     <ClCompile Include="Serialize\Serializer.cpp" />
     <ClCompile Include="Data\Convert\ColorConv.cpp" />
     <ClCompile Include="ConsoleListener.cpp" />

Common/Common.vcxproj.filters

@@ -777,6 +777,7 @@
     <ClCompile Include="Thread\ParallelLoop.cpp">
       <Filter>Thread</Filter>
     </ClCompile>
+    <ClCompile Include="RiscVCPUDetect.cpp" />
   </ItemGroup>
   <ItemGroup>
     <Filter Include="Crypto">

Common/FakeCPUDetect.cpp

@@ -22,6 +22,8 @@
 #define REAL_CPUDETECT_AVAIL 1
 #elif PPSSPP_ARCH(MIPS) || PPSSPP_ARCH(MIPS64)
 #define REAL_CPUDETECT_AVAIL 1
+#elif PPSSPP_ARCH(RISCV64)
+#define REAL_CPUDETECT_AVAIL 1
 #endif
 
 #ifndef REAL_CPUDETECT_AVAIL

Common/RiscVCPUDetect.cpp

@@ -0,0 +1,121 @@
+// Copyright (C) 2003 Dolphin Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official SVN repository and contact information can be found at
+// http://code.google.com/p/dolphin-emu/
+
+#include "ppsspp_config.h"
+#if PPSSPP_ARCH(RISCV64)
+
+#include "Common/Common.h"
+#include "Common/CPUDetect.h"
+#include "Common/StringUtils.h"
+#include "Common/File/FileUtil.h"
+#include "Common/Data/Encoding/Utf8.h"
+#include <cstring>
+#include <sstream>
+
+// Only Linux platforms have /proc/cpuinfo
+#if defined(__linux__)
+const char procfile[] = "/proc/cpuinfo";
+// https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu
+const char syscpupresentfile[] = "/sys/devices/system/cpu/present";
+
+std::string GetCPUString() {
+	std::string cpu_string = "Unknown";
+
+	return cpu_string;
+}
+
+int GetCoreCount()
+{
+	std::string line, marker = "processor\t: ";
+	int cores = 1;
+
+	std::string presentData;
+	bool presentSuccess = File::ReadFileToString(true, syscpupresentfile, presentData);
+	std::istringstream presentFile(presentData);
+
+	if (presentSuccess) {
+		int low, high, found;
+		std::getline(presentFile, line);
+		found = sscanf(line.c_str(), "%d-%d", &low, &high);
+		if (found == 1)
+			return 1;
+		if (found == 2)
+			return high - low + 1;
+	}
+
+	std::string procdata;
+	if (!File::ReadFileToString(true, procfile, procdata))
+		return 1;
+	std::istringstream file(procdata);
+	
+	while (std::getline(file, line))
+	{
+		if (line.find(marker) != std::string::npos)
+			++cores;
+	}
+	
+	return cores;
+}
+#endif
+
+CPUInfo cpu_info;
+
+CPUInfo::CPUInfo() {
+	Detect();
+}
+
+// Detects the various cpu features
+void CPUInfo::Detect()
+{
+	// Set some defaults here
+	HTT = false;
+#if PPSSPP_ARCH(RISCV64)
+	OS64bit = true;
+	CPU64bit = true;
+	Mode64bit = true;
+#else
+	OS64bit = false;
+	CPU64bit = false;
+	Mode64bit = false;
+#endif
+	vendor = VENDOR_OTHER;
+	logical_cpu_count = 1;
+	
+	// Get the information about the CPU 
+#if !defined(__linux__)
+	num_cores = 1;
+#else // __linux__
+	strncpy(cpu_string, GetCPUString().c_str(), sizeof(cpu_string));
+	unsigned short CPUPart = GetCPUPart();
+	num_cores = GetCoreCount();
+#endif
+}
+
+// Turn the cpu info into a string we can show
+std::string CPUInfo::Summarize()
+{
+	std::string sum;
+	if (num_cores == 1)
+		sum = StringFromFormat("%s, %i core", cpu_string, num_cores);
+	else
+		sum = StringFromFormat("%s, %i cores", cpu_string, num_cores);
+	if (CPU64bit) sum += ", 64-bit";
+
+	return sum;
+}
+
+#endif // PPSSPP_ARCH(RISCV64)

UI/DevScreens.cpp

@@ -423,6 +423,8 @@ const char *GetCompilerABI() {
 	return "x86";
 #elif PPSSPP_ARCH(AMD64)
 	return "x86-64";
+#elif PPSSPP_ARCH(RISCV64)
+	return "rv64";
 #else
 	return "other";
 #endif

libretro/Makefile.common

@@ -300,6 +300,7 @@ SOURCES_CXX += \
 	$(COMMONDIR)/OSVersion.cpp \
 	$(COMMONDIR)/MemoryUtil.cpp \
 	$(COMMONDIR)/MipsCPUDetect.cpp \
+	$(COMMONDIR)/RiscVCPUDetect.cpp \
 	$(COMMONDIR)/LogReporting.cpp \
 	$(COMMONDIR)/SysError.cpp \
 	$(COMMONDIR)/StringUtils.cpp \

ppsspp_config.h

@@ -64,6 +64,11 @@
     #define PPSSPP_ARCH_32BIT 1
 #endif
 
+#if defined(__riscv64__)
+	#define PPSSPP_ARCH_RISCV64 1
+	#define PPSSPP_ARCH_64BIT 1
+#endif
+
 
 // PLATFORM defines
 #if defined(_WIN32)