aboutsummaryrefslogtreecommitdiff
path: root/src/common/x64/cpu_detect.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/common/x64/cpu_detect.cpp')
-rw-r--r--src/common/x64/cpu_detect.cpp250
1 files changed, 0 insertions, 250 deletions
diff --git a/src/common/x64/cpu_detect.cpp b/src/common/x64/cpu_detect.cpp
deleted file mode 100644
index d613954eb5..0000000000
--- a/src/common/x64/cpu_detect.cpp
+++ /dev/null
@@ -1,250 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
-// SPDX-FileCopyrightText: Copyright 2013 Dolphin Emulator Project / 2015 Citra Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#include <array>
-#include <cstring>
-#include <fstream>
-#include <iterator>
-#include <optional>
-#include <string_view>
-#include <thread>
-#include <vector>
-#include "common/bit_util.h"
-#include "common/common_types.h"
-#include "common/logging.h"
-#include "common/x64/cpu_detect.h"
-#include "common/x64/rdtsc.h"
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#ifdef _MSC_VER
-#include <intrin.h>
-
-static inline u64 xgetbv(u32 index) {
- return _xgetbv(index);
-}
-#else
-
-#if defined(__DragonFly__) || defined(__FreeBSD__)
-// clang-format off
-#include <sys/types.h>
-#include <machine/cpufunc.h>
-// clang-format on
-#endif
-
-static inline void __cpuidex(int info[4], u32 function_id, u32 subfunction_id) {
-#if defined(__DragonFly__) || defined(__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], u32 function_id) {
- return __cpuidex(info, function_id, 0);
-}
-
-#define _XCR_XFEATURE_ENABLED_MASK 0
-static inline u64 xgetbv(u32 index) {
- u32 eax, edx;
- __asm__ __volatile__("xgetbv" : "=a"(eax), "=d"(edx) : "c"(index));
- return ((u64)edx << 32) | eax;
-}
-#endif // _MSC_VER
-
-namespace Common {
-
-CPUCaps::Manufacturer CPUCaps::ParseManufacturer(std::string_view brand_string) {
- if (brand_string == "GenuineIntel") {
- return Manufacturer::Intel;
- } else if (brand_string == "AuthenticAMD") {
- return Manufacturer::AMD;
- } else if (brand_string == "HygonGenuine") {
- return Manufacturer::Hygon;
- }
- return Manufacturer::Unknown;
-}
-
-// Detects the various CPU features
-static CPUCaps Detect() {
- CPUCaps caps = {};
-
- // Assumes the CPU supports the CPUID instruction. Those that don't would likely not support
- // yuzu at all anyway
-
- int cpu_id[4];
-
- // Detect CPU's CPUID capabilities and grab manufacturer string
- __cpuid(cpu_id, 0x00000000);
- const u32 max_std_fn = cpu_id[0]; // EAX
-
- std::memset(caps.brand_string, 0, std::size(caps.brand_string));
- std::memcpy(&caps.brand_string[0], &cpu_id[1], sizeof(u32));
- std::memcpy(&caps.brand_string[4], &cpu_id[3], sizeof(u32));
- std::memcpy(&caps.brand_string[8], &cpu_id[2], sizeof(u32));
-
- caps.manufacturer = CPUCaps::ParseManufacturer(caps.brand_string);
-
- // Set reasonable default cpu string even if brand string not available
- std::strncpy(caps.cpu_string, caps.brand_string, std::size(caps.brand_string));
-
- __cpuid(cpu_id, 0x80000000);
-
- const u32 max_ex_fn = cpu_id[0];
-
- // Detect family and other miscellaneous features
- if (max_std_fn >= 1) {
- __cpuid(cpu_id, 0x00000001);
- caps.sse3 = Common::Bit<0>(cpu_id[2]);
- caps.pclmulqdq = Common::Bit<1>(cpu_id[2]);
- caps.ssse3 = Common::Bit<9>(cpu_id[2]);
- caps.sse4_1 = Common::Bit<19>(cpu_id[2]);
- caps.sse4_2 = Common::Bit<20>(cpu_id[2]);
- caps.movbe = Common::Bit<22>(cpu_id[2]);
- caps.popcnt = Common::Bit<23>(cpu_id[2]);
- caps.aes = Common::Bit<25>(cpu_id[2]);
- caps.f16c = Common::Bit<29>(cpu_id[2]);
-
- // 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 (Common::Bit<28>(cpu_id[2]) && Common::Bit<27>(cpu_id[2])) {
- if ((xgetbv(_XCR_XFEATURE_ENABLED_MASK) & 0x6) == 0x6) {
- caps.avx = true;
- if (Common::Bit<12>(cpu_id[2]))
- caps.fma = true;
- }
- }
-
- if (max_std_fn >= 7) {
- __cpuidex(cpu_id, 0x00000007, 0x00000000);
- // Can't enable AVX{2,512} unless the XSAVE/XGETBV checks above passed
- if (caps.avx) {
- caps.avx2 = Common::Bit<5>(cpu_id[1]);
- caps.avx512f = Common::Bit<16>(cpu_id[1]);
- caps.avx512dq = Common::Bit<17>(cpu_id[1]);
- caps.avx512cd = Common::Bit<28>(cpu_id[1]);
- caps.avx512bw = Common::Bit<30>(cpu_id[1]);
- caps.avx512vl = Common::Bit<31>(cpu_id[1]);
- caps.avx512vbmi = Common::Bit<1>(cpu_id[2]);
- caps.avx512bitalg = Common::Bit<12>(cpu_id[2]);
- }
-
- caps.bmi1 = Common::Bit<3>(cpu_id[1]);
- caps.bmi2 = Common::Bit<8>(cpu_id[1]);
- caps.sha = Common::Bit<29>(cpu_id[1]);
-
- caps.waitpkg = Common::Bit<5>(cpu_id[2]);
- caps.gfni = Common::Bit<8>(cpu_id[2]);
- }
- }
-
- if (max_ex_fn >= 0x80000004) {
- // Extract CPU model string
- __cpuid(cpu_id, 0x80000002);
- std::memcpy(caps.cpu_string, cpu_id, sizeof(cpu_id));
- __cpuid(cpu_id, 0x80000003);
- std::memcpy(caps.cpu_string + 16, cpu_id, sizeof(cpu_id));
- __cpuid(cpu_id, 0x80000004);
- std::memcpy(caps.cpu_string + 32, cpu_id, sizeof(cpu_id));
- }
-
- if (max_ex_fn >= 0x80000001) {
- // Check for more features
- __cpuid(cpu_id, 0x80000001);
- caps.lzcnt = Common::Bit<5>(cpu_id[2]);
- caps.monitorx = Common::Bit<29>(cpu_id[2]);
- }
-
- if (max_ex_fn >= 0x80000007) {
- __cpuid(cpu_id, 0x80000007);
- caps.invariant_tsc = Common::Bit<8>(cpu_id[3]);
- }
-
- if (max_std_fn >= 0x15) {
- __cpuid(cpu_id, 0x15);
- caps.tsc_crystal_ratio_denominator = cpu_id[0];
- caps.tsc_crystal_ratio_numerator = cpu_id[1];
- caps.crystal_frequency = cpu_id[2];
- // Some CPU models might not return a crystal frequency.
- // The CPU model can be detected to use the values from turbostat
- // https://github.com/torvalds/linux/blob/master/tools/power/x86/turbostat/turbostat.c#L5569
- // but it's easier to just estimate the TSC tick rate for these cases.
- if (caps.tsc_crystal_ratio_denominator) {
- caps.tsc_frequency = static_cast<u64>(caps.crystal_frequency) *
- caps.tsc_crystal_ratio_numerator /
- caps.tsc_crystal_ratio_denominator;
- } else {
- caps.tsc_frequency = X64::EstimateRDTSCFrequency();
- }
- }
-
- if (max_std_fn >= 0x16) {
- __cpuid(cpu_id, 0x16);
- caps.base_frequency = cpu_id[0];
- caps.max_frequency = cpu_id[1];
- caps.bus_frequency = cpu_id[2];
- }
-
- return caps;
-}
-
-const CPUCaps& GetCPUCaps() {
- static CPUCaps caps = Detect();
- return caps;
-}
-
-std::optional<int> GetProcessorCount() {
-#if defined(_WIN32)
- // Get the buffer length.
- DWORD length = 0;
- GetLogicalProcessorInformation(nullptr, &length);
- if (GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
- LOG_ERROR(Frontend, "Failed to query core count.");
- return std::nullopt;
- }
- std::vector<SYSTEM_LOGICAL_PROCESSOR_INFORMATION> buffer(
- length / sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION));
- // Now query the core count.
- if (!GetLogicalProcessorInformation(buffer.data(), &length)) {
- LOG_ERROR(Frontend, "Failed to query core count.");
- return std::nullopt;
- }
- return static_cast<int>(
- std::count_if(buffer.cbegin(), buffer.cend(), [](const auto& proc_info) {
- return proc_info.Relationship == RelationProcessorCore;
- }));
-#elif defined(__unix__)
- const int thread_count = std::thread::hardware_concurrency();
- std::ifstream smt("/sys/devices/system/cpu/smt/active");
- char state = '0';
- if (smt) {
- smt.read(&state, sizeof(state));
- }
- switch (state) {
- case '0':
- return thread_count;
- case '1':
- return thread_count / 2;
- default:
- return std::nullopt;
- }
-#else
- // Shame on you
- return std::nullopt;
-#endif
-}
-
-} // namespace Common
generated by cgit v1.2.3 (git 2.39.1) at 2026-11-04 11:57:16 +0000