282 lines
6.6 KiB
C++
282 lines
6.6 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 "Common.h"
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#include "CPUDetect.h"
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#include "FileUtil.h"
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// Only Linux platforms have /proc/cpuinfo
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#if !defined(BLACKBERRY) && !defined(IOS) && !defined(__SYMBIAN32__)
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const char procfile[] = "/proc/cpuinfo";
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char *GetCPUString()
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{
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const char marker[] = "Hardware\t: ";
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char *cpu_string = 0;
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// Count the number of processor lines in /proc/cpuinfo
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char buf[1024];
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File::IOFile file(procfile, "r");
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auto const fp = file.GetHandle();
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if (!fp)
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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cpu_string = buf + sizeof(marker) - 1;
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cpu_string = strndup(cpu_string, strlen(cpu_string) - 1); // Strip the newline
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break;
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}
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return cpu_string;
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}
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unsigned char GetCPUImplementer()
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{
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const char marker[] = "CPU implementer\t: ";
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char *implementer_string = 0;
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unsigned char implementer = 0;
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char buf[1024];
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File::IOFile file(procfile, "r");
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auto const fp = file.GetHandle();
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if (!fp)
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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implementer_string = buf + sizeof(marker) - 1;
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implementer_string = strndup(implementer_string, strlen(implementer_string) - 1); // Strip the newline
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sscanf(implementer_string, "0x%02hhx", &implementer);
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break;
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}
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free(implementer_string);
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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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const char marker[] = "CPU part\t: ";
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char *part_string = 0;
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unsigned short part = 0;
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char buf[1024];
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File::IOFile file(procfile, "r");
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auto const fp = file.GetHandle();
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if (!fp)
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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part_string = buf + sizeof(marker) - 1;
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part_string = strndup(part_string, strlen(part_string) - 1); // Strip the newline
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sscanf(part_string, "0x%03hx", &part);
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break;
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}
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free(part_string);
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return part;
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}
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bool CheckCPUFeature(const char *feature)
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{
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const char marker[] = "Features\t: ";
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char buf[1024];
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File::IOFile file(procfile, "r");
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auto const fp = file.GetHandle();
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if (!fp)
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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char *featurestring = buf + sizeof(marker) - 1;
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char *token = strtok(featurestring, " ");
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while (token != NULL)
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{
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if (strstr(token, feature))
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return true;
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token = strtok(NULL, " ");
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}
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}
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return false;
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}
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#endif
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int GetCoreCount()
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{
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#ifdef __SYMBIAN32__
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return 1;
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#elif defined(BLACKBERRY) || defined(IOS)
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return 2;
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#else
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const char marker[] = "processor\t: ";
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int cores = 0;
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char buf[1024];
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File::IOFile file(procfile, "r");
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auto const fp = file.GetHandle();
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if (!fp)
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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++cores;
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}
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return cores;
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#endif
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}
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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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// When ARMv8 cpus come out, these need to be updated.
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HTT = false;
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OS64bit = false;
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CPU64bit = false;
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Mode64bit = false;
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vendor = VENDOR_ARM;
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// Get the information about the CPU
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num_cores = GetCoreCount();
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#if defined(__SYMBIAN32__) || defined(BLACKBERRY) || defined(IOS)
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bool isVFP3 = false;
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bool isVFP4 = false;
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#ifdef 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 // #ifdef __ARM_ARCH_7S__
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#elif defined(BLACKBERRY)
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isVFP3 = true;
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const char cpuInfoPath[] = "/pps/services/hw_info/inventory";
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const char marker[] = "Processor_Name::";
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const char qcCPU[] = "MSM";
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char buf[1024];
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FILE* fp;
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if (fp = fopen(cpuInfoPath, "r"))
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{
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while (fgets(buf, sizeof(buf), fp))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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if (strncmp(buf + sizeof(marker) - 1, qcCPU, sizeof(qcCPU) - 1) == 0)
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isVFP4 = true;
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break;
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}
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fclose(fp);
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}
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#endif
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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
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strncpy(cpu_string, GetCPUString(), sizeof(cpu_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.
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if (GetCPUImplementer() == 0x51 && GetCPUPart() == 0x6F) // Krait(300) is 0x6F, Scorpion is 0x4D
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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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#endif
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// On android, we build a separate library for ARMv7 so this is fine.
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// TODO: Check for ARMv7 on other platforms.
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#if defined(__ARM_ARCH_7A__)
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bArmV7 = true;
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#else
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bArmV7 = false;
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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 defined(BLACKBERRY) || defined(IOS) || defined(__SYMBIAN32__)
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sum = StringFromFormat("%i cores", num_cores);
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#else
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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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#endif
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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 (bVFP) sum += ", VFP";
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if (bEDSP) sum += ", EDSP";
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if (bThumbEE) sum += ", ThumbEE";
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if (bNEON) sum += ", NEON";
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if (bVFPv3) sum += ", VFPv3";
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if (bTLS) sum += ", TLS";
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if (bVFPv4) sum += ", VFPv4";
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if (bIDIVa) sum += ", IDIVa";
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if (bIDIVt) sum += ", IDIVt";
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return sum;
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}
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