Common: Cleanup CPU capability detection code.
This commit is contained in:
bunnei
parent
15e9a59ad0
commit
e019e69016
5 changed files with 144 additions and 201 deletions
|
|
@ -1,23 +1,25 @@
|
|||
// Copyright 2008 Dolphin Emulator Project
|
||||
// Licensed under GPLv2+
|
||||
// Copyright 2013 Dolphin Emulator Project / 2015 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <cstring>
|
||||
#include <string>
|
||||
#include <thread>
|
||||
|
||||
#include "common/common_types.h"
|
||||
|
||||
#include "cpu_detect.h"
|
||||
|
||||
#ifndef _WIN32
|
||||
namespace Common {
|
||||
|
||||
#ifndef _MSC_VER
|
||||
|
||||
#ifdef __FreeBSD__
|
||||
#include <sys/types.h>
|
||||
#include <machine/cpufunc.h>
|
||||
#endif
|
||||
|
||||
static inline void __cpuidex(int info[4], int function_id, int subfunction_id)
|
||||
{
|
||||
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);
|
||||
|
|
@ -36,96 +38,67 @@ static inline void __cpuidex(int info[4], int function_id, int subfunction_id)
|
|||
#endif
|
||||
}
|
||||
|
||||
static inline void __cpuid(int info[4], int function_id)
|
||||
{
|
||||
static inline void __cpuid(int info[4], int function_id) {
|
||||
return __cpuidex(info, function_id, 0);
|
||||
}
|
||||
|
||||
#define _XCR_XFEATURE_ENABLED_MASK 0
|
||||
static u64 _xgetbv(u32 index)
|
||||
{
|
||||
static u64 _xgetbv(u32 index) {
|
||||
u32 eax, edx;
|
||||
__asm__ __volatile__("xgetbv" : "=a"(eax), "=d"(edx) : "c"(index));
|
||||
return ((u64)edx << 32) | eax;
|
||||
}
|
||||
|
||||
#endif // ifndef _WIN32
|
||||
|
||||
namespace Common {
|
||||
|
||||
CPUInfo cpu_info;
|
||||
|
||||
CPUInfo::CPUInfo() {
|
||||
Detect();
|
||||
}
|
||||
#endif // ifndef _MSC_VER
|
||||
|
||||
// Detects the various CPU features
|
||||
void CPUInfo::Detect() {
|
||||
memset(this, 0, sizeof(*this));
|
||||
#ifdef ARCHITECTURE_X64
|
||||
Mode64bit = true;
|
||||
OS64bit = true;
|
||||
#endif
|
||||
num_cores = 1;
|
||||
static CPUCaps Detect() {
|
||||
CPUCaps caps = {};
|
||||
|
||||
// Set obvious defaults, for extra safety
|
||||
if (Mode64bit) {
|
||||
bSSE = true;
|
||||
bSSE2 = true;
|
||||
bLongMode = true;
|
||||
}
|
||||
caps.num_cores = std::thread::hardware_concurrency();
|
||||
|
||||
// Assumes the CPU supports the CPUID instruction. Those that don't would likely not support
|
||||
// Citra at all anyway
|
||||
|
||||
// Assume CPU supports the CPUID instruction. Those that don't can barely
|
||||
// boot modern OS:es anyway.
|
||||
int cpu_id[4];
|
||||
memset(brand_string, 0, sizeof(brand_string));
|
||||
memset(caps.brand_string, 0, sizeof(caps.brand_string));
|
||||
|
||||
// Detect CPU's CPUID capabilities, and grab CPU string
|
||||
// Detect CPU's CPUID capabilities and grab CPU string
|
||||
__cpuid(cpu_id, 0x00000000);
|
||||
u32 max_std_fn = cpu_id[0]; // EAX
|
||||
*((int *)brand_string) = cpu_id[1];
|
||||
*((int *)(brand_string + 4)) = cpu_id[3];
|
||||
*((int *)(brand_string + 8)) = cpu_id[2];
|
||||
u32 max_std_fn = cpu_id[0]; // EAX
|
||||
|
||||
std::memcpy(&caps.brand_string[0], &cpu_id[1], sizeof(int));
|
||||
std::memcpy(&caps.brand_string[4], &cpu_id[3], sizeof(int));
|
||||
std::memcpy(&caps.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 = VENDOR_INTEL;
|
||||
else if (!strcmp(brand_string, "AuthenticAMD"))
|
||||
vendor = VENDOR_AMD;
|
||||
if (!strcmp(caps.brand_string, "GenuineIntel"))
|
||||
caps.vendor = CPUVendor::INTEL;
|
||||
else if (!strcmp(caps.brand_string, "AuthenticAMD"))
|
||||
caps.vendor = CPUVendor::AMD;
|
||||
else
|
||||
vendor = VENDOR_OTHER;
|
||||
caps.vendor = CPUVendor::OTHER;
|
||||
|
||||
// Set reasonable default brand string even if brand string not available.
|
||||
strcpy(cpu_string, brand_string);
|
||||
// Set reasonable default brand string even if brand string not available
|
||||
strcpy(caps.cpu_string, caps.brand_string);
|
||||
|
||||
// Detect family and other misc stuff.
|
||||
bool ht = false;
|
||||
HTT = ht;
|
||||
logical_cpu_count = 1;
|
||||
// Detect family and other miscellaneous features
|
||||
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;
|
||||
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] >> 25) & 1) caps.sse = true;
|
||||
if ((cpu_id[3] >> 26) & 1) caps.sse2 = true;
|
||||
if ((cpu_id[2]) & 1) caps.sse3 = true;
|
||||
if ((cpu_id[2] >> 9) & 1) caps.ssse3 = true;
|
||||
if ((cpu_id[2] >> 19) & 1) caps.sse4_1 = true;
|
||||
if ((cpu_id[2] >> 20) & 1) caps.sse4_2 = true;
|
||||
if ((cpu_id[2] >> 22) & 1) caps.movbe = true;
|
||||
if ((cpu_id[2] >> 25) & 1) caps.aes = true;
|
||||
|
||||
if ((cpu_id[3] >> 24) & 1)
|
||||
{
|
||||
// We can use FXSAVE.
|
||||
bFXSR = true;
|
||||
if ((cpu_id[3] >> 24) & 1) {
|
||||
caps.fxsave_fxrstor = true;
|
||||
}
|
||||
|
||||
// AVX support requires 3 separate checks:
|
||||
|
|
@ -134,95 +107,80 @@ void CPUInfo::Detect() {
|
|||
// - 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;
|
||||
caps.avx = true;
|
||||
if ((cpu_id[2] >> 12) & 1)
|
||||
bFMA = true;
|
||||
caps.fma = true;
|
||||
}
|
||||
}
|
||||
|
||||
if (max_std_fn >= 7) {
|
||||
__cpuidex(cpu_id, 0x00000007, 0x00000000);
|
||||
// careful; we can't enable AVX2 unless the XSAVE/XGETBV checks above passed
|
||||
// Can't enable AVX2 unless the XSAVE/XGETBV checks above passed
|
||||
if ((cpu_id[1] >> 5) & 1)
|
||||
bAVX2 = bAVX;
|
||||
caps.avx2 = caps.avx;
|
||||
if ((cpu_id[1] >> 3) & 1)
|
||||
bBMI1 = true;
|
||||
caps.bmi1 = true;
|
||||
if ((cpu_id[1] >> 8) & 1)
|
||||
bBMI2 = true;
|
||||
caps.bmi2 = true;
|
||||
}
|
||||
}
|
||||
|
||||
bFlushToZero = bSSE;
|
||||
caps.flush_to_zero = caps.sse;
|
||||
|
||||
if (max_ex_fn >= 0x80000004) {
|
||||
// Extract CPU model string
|
||||
__cpuid(cpu_id, 0x80000002);
|
||||
memcpy(cpu_string, cpu_id, sizeof(cpu_id));
|
||||
std::memcpy(caps.cpu_string, cpu_id, sizeof(cpu_id));
|
||||
__cpuid(cpu_id, 0x80000003);
|
||||
memcpy(cpu_string + 16, cpu_id, sizeof(cpu_id));
|
||||
std::memcpy(caps.cpu_string + 16, cpu_id, sizeof(cpu_id));
|
||||
__cpuid(cpu_id, 0x80000004);
|
||||
memcpy(cpu_string + 32, cpu_id, sizeof(cpu_id));
|
||||
std::memcpy(caps.cpu_string + 32, cpu_id, sizeof(cpu_id));
|
||||
}
|
||||
|
||||
if (max_ex_fn >= 0x80000001) {
|
||||
// Check for more features.
|
||||
// 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;
|
||||
if (cpu_id[2] & 1) caps.lahf_sahf_64 = true;
|
||||
if ((cpu_id[2] >> 5) & 1) caps.lzcnt = true;
|
||||
if ((cpu_id[2] >> 16) & 1) caps.fma4 = true;
|
||||
if ((cpu_id[3] >> 29) & 1) caps.long_mode = 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 == VENDOR_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;
|
||||
}
|
||||
}
|
||||
return caps;
|
||||
}
|
||||
|
||||
// Turn the CPU info into a string we can show
|
||||
std::string CPUInfo::Summarize() {
|
||||
std::string sum(cpu_string);
|
||||
const CPUCaps& GetCPUCaps() {
|
||||
static CPUCaps caps = Detect();
|
||||
return caps;
|
||||
}
|
||||
|
||||
std::string GetCPUCapsString() {
|
||||
auto caps = GetCPUCaps();
|
||||
|
||||
std::string sum(caps.cpu_string);
|
||||
sum += " (";
|
||||
sum += brand_string;
|
||||
sum += caps.brand_string;
|
||||
sum += ")";
|
||||
|
||||
if (bSSE) sum += ", SSE";
|
||||
if (bSSE2) {
|
||||
if (caps.sse) sum += ", SSE";
|
||||
if (caps.sse2) {
|
||||
sum += ", SSE2";
|
||||
if (!bFlushToZero)
|
||||
sum += " (but not DAZ!)";
|
||||
if (!caps.flush_to_zero) sum += " (without 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";
|
||||
|
||||
if (caps.sse3) sum += ", SSE3";
|
||||
if (caps.ssse3) sum += ", SSSE3";
|
||||
if (caps.sse4_1) sum += ", SSE4.1";
|
||||
if (caps.sse4_2) sum += ", SSE4.2";
|
||||
if (caps.avx) sum += ", AVX";
|
||||
if (caps.avx2) sum += ", AVX2";
|
||||
if (caps.bmi1) sum += ", BMI1";
|
||||
if (caps.bmi2) sum += ", BMI2";
|
||||
if (caps.fma) sum += ", FMA";
|
||||
if (caps.aes) sum += ", AES";
|
||||
if (caps.movbe) sum += ", MOVBE";
|
||||
if (caps.long_mode) sum += ", 64-bit support";
|
||||
|
||||
return sum;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue