mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2024-11-15 05:47:56 -07:00
279 lines
6.7 KiB
C++
279 lines
6.7 KiB
C++
// Copyright 2008 Dolphin Emulator Project
|
|
// Licensed under GPLv2+
|
|
// Refer to the license.txt file included.
|
|
|
|
#include <cstring>
|
|
#include <string>
|
|
|
|
#include "Common/CPUDetect.h"
|
|
#include "Common/CommonTypes.h"
|
|
#include "Common/Intrinsics.h"
|
|
|
|
#ifndef _WIN32
|
|
|
|
#ifdef __FreeBSD__
|
|
#include <unistd.h>
|
|
|
|
#include <machine/cpufunc.h>
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
static inline void __cpuidex(int info[4], int function_id, int subfunction_id)
|
|
{
|
|
#ifdef __FreeBSD__
|
|
// Despite the name, this is just do_cpuid() with ECX as second input.
|
|
cpuid_count((u_int)function_id, (u_int)subfunction_id, (u_int*)info);
|
|
#else
|
|
info[0] = function_id; // eax
|
|
info[2] = subfunction_id; // ecx
|
|
__asm__("cpuid"
|
|
: "=a"(info[0]), "=b"(info[1]), "=c"(info[2]), "=d"(info[3])
|
|
: "a"(function_id), "c"(subfunction_id));
|
|
#endif
|
|
}
|
|
|
|
static inline void __cpuid(int info[4], int function_id)
|
|
{
|
|
return __cpuidex(info, function_id, 0);
|
|
}
|
|
|
|
#endif // ifndef _WIN32
|
|
|
|
#ifdef _WIN32
|
|
|
|
static u64 xgetbv(u32 index)
|
|
{
|
|
return _xgetbv(index);
|
|
}
|
|
constexpr u32 XCR_XFEATURE_ENABLED_MASK = _XCR_XFEATURE_ENABLED_MASK;
|
|
|
|
#else
|
|
|
|
static u64 xgetbv(u32 index)
|
|
{
|
|
u32 eax, edx;
|
|
__asm__ __volatile__("xgetbv" : "=a"(eax), "=d"(edx) : "c"(index));
|
|
return ((u64)edx << 32) | eax;
|
|
}
|
|
constexpr u32 XCR_XFEATURE_ENABLED_MASK = 0;
|
|
#endif // ifdef _WIN32
|
|
|
|
CPUInfo cpu_info;
|
|
|
|
CPUInfo::CPUInfo()
|
|
{
|
|
Detect();
|
|
}
|
|
|
|
// Detects the various CPU features
|
|
void CPUInfo::Detect()
|
|
{
|
|
#ifdef _M_X86_64
|
|
Mode64bit = true;
|
|
OS64bit = true;
|
|
#endif
|
|
num_cores = 1;
|
|
|
|
// Set obvious defaults, for extra safety
|
|
if (Mode64bit)
|
|
{
|
|
bSSE = true;
|
|
bSSE2 = true;
|
|
bLongMode = true;
|
|
}
|
|
|
|
// Assume CPU supports the CPUID instruction. Those that don't can barely
|
|
// boot modern OS:es anyway.
|
|
int cpu_id[4];
|
|
|
|
// Detect CPU's CPUID capabilities, and grab CPU string
|
|
__cpuid(cpu_id, 0x00000000);
|
|
u32 max_std_fn = cpu_id[0]; // EAX
|
|
std::memcpy(&brand_string[0], &cpu_id[1], sizeof(int));
|
|
std::memcpy(&brand_string[4], &cpu_id[3], sizeof(int));
|
|
std::memcpy(&brand_string[8], &cpu_id[2], sizeof(int));
|
|
__cpuid(cpu_id, 0x80000000);
|
|
u32 max_ex_fn = cpu_id[0];
|
|
if (!strcmp(brand_string, "GenuineIntel"))
|
|
vendor = CPUVendor::Intel;
|
|
else if (!strcmp(brand_string, "AuthenticAMD"))
|
|
vendor = CPUVendor::AMD;
|
|
else
|
|
vendor = CPUVendor::Other;
|
|
|
|
// Set reasonable default brand string even if brand string not available.
|
|
strcpy(cpu_string, brand_string);
|
|
|
|
// Detect family and other misc stuff.
|
|
bool ht = false;
|
|
HTT = ht;
|
|
logical_cpu_count = 1;
|
|
if (max_std_fn >= 1)
|
|
{
|
|
__cpuid(cpu_id, 0x00000001);
|
|
int family = ((cpu_id[0] >> 8) & 0xf) + ((cpu_id[0] >> 20) & 0xff);
|
|
int model = ((cpu_id[0] >> 4) & 0xf) + ((cpu_id[0] >> 12) & 0xf0);
|
|
// Detect people unfortunate enough to be running Dolphin on an Atom
|
|
if (family == 6 &&
|
|
(model == 0x1C || model == 0x26 || model == 0x27 || model == 0x35 || model == 0x36 ||
|
|
model == 0x37 || model == 0x4A || model == 0x4D || model == 0x5A || model == 0x5D))
|
|
bAtom = true;
|
|
// Detect AMD Zen1, Zen1+ and Zen2
|
|
if (family == 23)
|
|
bZen1p2 = true;
|
|
logical_cpu_count = (cpu_id[1] >> 16) & 0xFF;
|
|
ht = (cpu_id[3] >> 28) & 1;
|
|
|
|
if ((cpu_id[3] >> 25) & 1)
|
|
bSSE = true;
|
|
if ((cpu_id[3] >> 26) & 1)
|
|
bSSE2 = true;
|
|
if ((cpu_id[2]) & 1)
|
|
bSSE3 = true;
|
|
if ((cpu_id[2] >> 9) & 1)
|
|
bSSSE3 = true;
|
|
if ((cpu_id[2] >> 19) & 1)
|
|
bSSE4_1 = true;
|
|
if ((cpu_id[2] >> 20) & 1)
|
|
bSSE4_2 = true;
|
|
if ((cpu_id[2] >> 22) & 1)
|
|
bMOVBE = true;
|
|
if ((cpu_id[2] >> 25) & 1)
|
|
bAES = true;
|
|
|
|
if ((cpu_id[3] >> 24) & 1)
|
|
{
|
|
// We can use FXSAVE.
|
|
bFXSR = true;
|
|
}
|
|
|
|
// AVX support requires 3 separate checks:
|
|
// - Is the AVX bit set in CPUID?
|
|
// - Is the XSAVE bit set in CPUID?
|
|
// - XGETBV result has the XCR bit set.
|
|
if (((cpu_id[2] >> 28) & 1) && ((cpu_id[2] >> 27) & 1))
|
|
{
|
|
if ((xgetbv(XCR_XFEATURE_ENABLED_MASK) & 0x6) == 0x6)
|
|
{
|
|
bAVX = true;
|
|
if ((cpu_id[2] >> 12) & 1)
|
|
bFMA = true;
|
|
}
|
|
}
|
|
|
|
if (max_std_fn >= 7)
|
|
{
|
|
__cpuidex(cpu_id, 0x00000007, 0x00000000);
|
|
// careful; we can't enable AVX2 unless the XSAVE/XGETBV checks above passed
|
|
if ((cpu_id[1] >> 5) & 1)
|
|
bAVX2 = bAVX;
|
|
if ((cpu_id[1] >> 3) & 1)
|
|
bBMI1 = true;
|
|
if ((cpu_id[1] >> 8) & 1)
|
|
bBMI2 = true;
|
|
}
|
|
}
|
|
|
|
bFlushToZero = bSSE;
|
|
bFastBMI2 = bBMI2 && !bZen1p2;
|
|
|
|
if (max_ex_fn >= 0x80000004)
|
|
{
|
|
// Extract CPU model string
|
|
__cpuid(cpu_id, 0x80000002);
|
|
memcpy(cpu_string, cpu_id, sizeof(cpu_id));
|
|
__cpuid(cpu_id, 0x80000003);
|
|
memcpy(cpu_string + 16, cpu_id, sizeof(cpu_id));
|
|
__cpuid(cpu_id, 0x80000004);
|
|
memcpy(cpu_string + 32, cpu_id, sizeof(cpu_id));
|
|
}
|
|
if (max_ex_fn >= 0x80000001)
|
|
{
|
|
// Check for more features.
|
|
__cpuid(cpu_id, 0x80000001);
|
|
if (cpu_id[2] & 1)
|
|
bLAHFSAHF64 = true;
|
|
if ((cpu_id[2] >> 5) & 1)
|
|
bLZCNT = true;
|
|
if ((cpu_id[2] >> 16) & 1)
|
|
bFMA4 = true;
|
|
if ((cpu_id[3] >> 29) & 1)
|
|
bLongMode = true;
|
|
}
|
|
|
|
num_cores = (logical_cpu_count == 0) ? 1 : logical_cpu_count;
|
|
|
|
if (max_ex_fn >= 0x80000008)
|
|
{
|
|
// Get number of cores. This is a bit complicated. Following AMD manual here.
|
|
__cpuid(cpu_id, 0x80000008);
|
|
int apic_id_core_id_size = (cpu_id[2] >> 12) & 0xF;
|
|
if (apic_id_core_id_size == 0)
|
|
{
|
|
if (ht)
|
|
{
|
|
// New mechanism for modern Intel CPUs.
|
|
if (vendor == CPUVendor::Intel)
|
|
{
|
|
__cpuidex(cpu_id, 0x00000004, 0x00000000);
|
|
int cores_x_package = ((cpu_id[0] >> 26) & 0x3F) + 1;
|
|
HTT = (cores_x_package < logical_cpu_count);
|
|
cores_x_package = ((logical_cpu_count % cores_x_package) == 0) ? cores_x_package : 1;
|
|
num_cores = (cores_x_package > 1) ? cores_x_package : num_cores;
|
|
logical_cpu_count /= cores_x_package;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Use AMD's new method.
|
|
num_cores = (cpu_id[2] & 0xFF) + 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Turn the CPU info into a string we can show
|
|
std::string CPUInfo::Summarize()
|
|
{
|
|
std::string sum(cpu_string);
|
|
sum += " (";
|
|
sum += brand_string;
|
|
sum += ")";
|
|
|
|
if (bSSE)
|
|
sum += ", SSE";
|
|
if (bSSE2)
|
|
{
|
|
sum += ", SSE2";
|
|
if (!bFlushToZero)
|
|
sum += " (but not DAZ!)";
|
|
}
|
|
if (bSSE3)
|
|
sum += ", SSE3";
|
|
if (bSSSE3)
|
|
sum += ", SSSE3";
|
|
if (bSSE4_1)
|
|
sum += ", SSE4.1";
|
|
if (bSSE4_2)
|
|
sum += ", SSE4.2";
|
|
if (HTT)
|
|
sum += ", HTT";
|
|
if (bAVX)
|
|
sum += ", AVX";
|
|
if (bAVX2)
|
|
sum += ", AVX2";
|
|
if (bBMI1)
|
|
sum += ", BMI1";
|
|
if (bBMI2)
|
|
sum += ", BMI2";
|
|
if (bFMA)
|
|
sum += ", FMA";
|
|
if (bAES)
|
|
sum += ", AES";
|
|
if (bMOVBE)
|
|
sum += ", MOVBE";
|
|
if (bLongMode)
|
|
sum += ", 64-bit support";
|
|
return sum;
|
|
}
|