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// 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 "Common.h"
#include "CPUDetect.h"
#include "StringUtil.h"
#include "FileUtil.h"
const char procfile[] = "/proc/cpuinfo";
char *GetCPUString()
{
const char marker[] = "Hardware\t: ";
char *cpu_string = 0;
// Count the number of processor lines in /proc/cpuinfo
char buf[1024];
File::IOFile file(procfile, "r");
auto const fp = file.GetHandle();
if (!fp)
return 0;
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
continue;
cpu_string = buf + sizeof(marker) - 1;
cpu_string = strndup(cpu_string, strlen(cpu_string) - 1); // Strip the newline
break;
}
return cpu_string;
}
unsigned char GetCPUImplementer()
{
const char marker[] = "CPU implementer\t: ";
char *implementer_string = 0;
unsigned char implementer = 0;
char buf[1024];
File::IOFile file(procfile, "r");
auto const fp = file.GetHandle();
if (!fp)
return 0;
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
continue;
implementer_string = buf + sizeof(marker) - 1;
implementer_string = strndup(implementer_string, strlen(implementer_string) - 1); // Strip the newline
sscanf(implementer_string, "0x%02hhx", &implementer);
break;
}
return implementer;
}
unsigned short GetCPUPart()
{
const char marker[] = "CPU part\t: ";
char *part_string = 0;
unsigned short part = 0;
char buf[1024];
File::IOFile file(procfile, "r");
auto const fp = file.GetHandle();
if (!fp)
return 0;
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
continue;
part_string = buf + sizeof(marker) - 1;
part_string = strndup(part_string, strlen(part_string) - 1); // Strip the newline
sscanf(part_string, "0x%03hx", &part);
break;
}
return part;
}
bool CheckCPUFeature(const char *feature)
{
const char marker[] = "Features\t: ";
char buf[1024];
File::IOFile file(procfile, "r");
auto const fp = file.GetHandle();
if (!fp)
return 0;
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
continue;
char *featurestring = buf + sizeof(marker) - 1;
char *token = strtok(featurestring, " ");
while (token != NULL)
{
if (strstr(token, feature))
return true;
token = strtok(NULL, " ");
}
}
return false;
}
int GetCoreCount()
{
const char marker[] = "processor\t: ";
int cores = 0;
char buf[1024];
File::IOFile file(procfile, "r");
auto const fp = file.GetHandle();
if (!fp)
return 0;
while (fgets(buf, sizeof(buf), fp))
{
if (strncmp(buf, marker, sizeof(marker) - 1))
continue;
++cores;
}
return cores;
}
CPUInfo cpu_info;
CPUInfo::CPUInfo() {
Detect();
}
// Detects the various cpu features
void CPUInfo::Detect()
{
// Set some defaults here
// When ARMv8 cpus come out, these need to be updated.
HTT = false;
OS64bit = false;
CPU64bit = false;
Mode64bit = false;
vendor = VENDOR_ARM;
// Get the information about the CPU
strncpy(cpu_string, GetCPUString(), sizeof(cpu_string));
num_cores = GetCoreCount();
bSwp = CheckCPUFeature("swp");
bHalf = CheckCPUFeature("half");
bThumb = CheckCPUFeature("thumb");
bFastMult = CheckCPUFeature("fastmult");
bVFP = CheckCPUFeature("vfp");
bEDSP = CheckCPUFeature("edsp");
bThumbEE = CheckCPUFeature("thumbee");
bNEON = CheckCPUFeature("neon");
bVFPv3 = CheckCPUFeature("vfpv3");
bTLS = CheckCPUFeature("tls");
bVFPv4 = CheckCPUFeature("vfpv4");
bIDIVa = CheckCPUFeature("idiva");
bIDIVt = CheckCPUFeature("idivt");
// Qualcomm Krait supports IDIVA but it doesn't report it. Check for krait.
if (GetCPUImplementer() == 0x51 && GetCPUPart() == 0x6F) // Krait(300) is 0x6F, Scorpion is 0x4D
bIDIVa = bIDIVt = true;
// These two are ARMv8 specific.
bFP = CheckCPUFeature("fp");
bASIMD = CheckCPUFeature("asimd");
#if defined(__ARM_ARCH_7A__)
bArmV7 = true;
#else
bArmV7 = false;
#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 (bSwp) sum += ", SWP";
if (bHalf) sum += ", Half";
if (bThumb) sum += ", Thumb";
if (bFastMult) sum += ", FastMult";
if (bVFP) sum += ", VFP";
if (bEDSP) sum += ", EDSP";
if (bThumbEE) sum += ", ThumbEE";
if (bNEON) sum += ", NEON";
if (bVFPv3) sum += ", VFPv3";
if (bTLS) sum += ", TLS";
if (bVFPv4) sum += ", VFPv4";
if (bIDIVa) sum += ", IDIVa";
if (bIDIVt) sum += ", IDIVt";
return sum;
}
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