coalesced cpu caps + wall clokc timer

src/common/CMakeLists.txt

@@ -141,12 +141,12 @@ add_library(
     vector_math.h
     virtual_buffer.cpp
     virtual_buffer.h
-    wall_clock.cpp
-    wall_clock.h
     zstd_compression.cpp
     zstd_compression.h
     fs/ryujinx_compat.h fs/ryujinx_compat.cpp
     fs/symlink.h fs/symlink.cpp
+    cpu_features.cpp
+    cpu_features.h
     httplib.h
     net/net.h net/net.cpp)
 
@@ -180,8 +180,7 @@ endif()
 if(ARCHITECTURE_x86_64)
     target_sources(
         common
-        PRIVATE x64/cpu_detect.cpp
-        x64/cpu_detect.h
+        PRIVATE
         x64/rdtsc.cpp
         x64/rdtsc.h
         x64/xbyak.h)

src/common/cpu_features.cpp

@@ -13,33 +13,42 @@
 #include <string_view>
 #include <thread>
 #include <vector>
-#include "common/bit_util.h"
-#include "common/common_types.h"
-#include "common/logging.h"
-#ifdef ARCHITECTURE_x86_64
-#include "common/x64/cpu_detect.h"
-#include "common/x64/rdtsc.h"
-#endif
-
 #ifdef _WIN32
 #include <windows.h>
 #endif
+#if defined(__DragonFly__) || defined(__FreeBSD__)
+#include <sys/types.h>
+#include <machine/cpufunc.h>
+#endif
 
+#include "common/steady_clock.h"
+#include "common/uint128.h"
+#include "common/bit_util.h"
+#include "common/common_types.h"
+#include "common/cpu_detect.h"
+
+#ifdef ARCHITECTURE_x86_64
+#include "common/x64/rdtsc.h"
 #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
 
+#ifdef __ANDROID__
+#include <sys/system_properties.h>
+#endif
+#ifdef ARCHITECTURE_x86_64
+#include "common/x64/rdtsc.h"
+#endif
+
+namespace Common {
+
+#ifdef ARCHITECTURE_x86_64
+
+namespace {
 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.
@@ -64,8 +73,7 @@ static inline u64 xgetbv(u32 index) {
     return ((u64)edx << 32) | eax;
 }
 #endif // _MSC_VER
-
-namespace Common {
+}
 
 CPUCaps::Manufacturer CPUCaps::ParseManufacturer(std::string_view brand_string) {
     if (brand_string == "GenuineIntel") {
@@ -78,6 +86,47 @@ CPUCaps::Manufacturer CPUCaps::ParseManufacturer(std::string_view brand_string)
     return Manufacturer::Unknown;
 }
 
+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
+}
+
 /// @brief Detects the various CPU features
 const CPUCaps g_cpu_caps = [] {
     CPUCaps caps = {};
@@ -184,12 +233,14 @@ const CPUCaps g_cpu_caps = [] {
         // 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;
+            caps.tsc_frequency = u64(caps.crystal_frequency)
+                * caps.tsc_crystal_ratio_numerator / caps.tsc_crystal_ratio_denominator;
         } else {
             caps.tsc_frequency = X64::EstimateRDTSCFrequency();
         }
+        caps.tsc_to_ns_ratio = GetFixedPoint64Factor(NsRatio::den, caps.tsc_frequency);
+    } else {
+        caps.tsc_to_ns_ratio = 1;
     }
 
     if (max_std_fn >= 0x16) {
@@ -201,45 +252,184 @@ const CPUCaps g_cpu_caps = [] {
     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
+
+#if defined(ARCHITECTURE_x86_64)
+WallClock::WallClock(bool invariant_, u64 rdtsc_frequency_) noexcept
+    : rdtsc_frequency{rdtsc_frequency_}
+    , ns_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(NsRatio::den, rdtsc_frequency_) : 0}
+    , us_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(UsRatio::den, rdtsc_frequency_) : 0}
+    , ms_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(MsRatio::den, rdtsc_frequency_) : 0}
+    , cntpct_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(CNTFRQ, rdtsc_frequency_) : 0}
+    , gputick_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(GPUTickFreq, rdtsc_frequency_) : 0}
+    , invariant{invariant_}
+{}
+
+std::chrono::nanoseconds WallClock::GetTimeNS() const {
+    if (!invariant)
+        return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::system_clock::now().time_since_epoch());
+    return std::chrono::nanoseconds{MultiplyHigh(GetUptime(), ns_rdtsc_factor)};
+}
+
+std::chrono::microseconds WallClock::GetTimeUS() const {
+    if (!invariant)
+        return std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::system_clock::now().time_since_epoch());
+    return std::chrono::microseconds{MultiplyHigh(GetUptime(), us_rdtsc_factor)};
+}
+
+std::chrono::milliseconds WallClock::GetTimeMS() const {
+    if (!invariant)
+        return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch());
+    return std::chrono::milliseconds{MultiplyHigh(GetUptime(), ms_rdtsc_factor)};
+}
+
+s64 WallClock::GetCNTPCT() const {
+    if (!invariant)
+        return GetUptime() * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den;
+    return MultiplyHigh(GetUptime(), cntpct_rdtsc_factor);
+}
+
+s64 WallClock::GetGPUTick() const {
+    if (!invariant)
+        return GetUptime() * NsToGPUTickRatio::num / NsToGPUTickRatio::den;
+    return MultiplyHigh(GetUptime(), gputick_rdtsc_factor);
+}
+
+s64 WallClock::GetUptime() const {
+    if (!invariant)
+        return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::steady_clock::now().time_since_epoch()).count();
+    return s64(Common::X64::FencedRDTSC());
+}
+
+bool WallClock::IsNative() const {
+    return invariant;
+}
+#elif defined(HAS_NCE)
+namespace {
+
+[[nodiscard]] WallClock::FactorType GetFixedPointFactor(u64 num, u64 den) noexcept {
+    return (WallClock::FactorType(num) << 64) / den;
+}
+
+[[nodiscard]] u64 MultiplyHigh(u64 m, WallClock::FactorType factor) noexcept {
+    return static_cast<u64>((m * factor) >> 64);
+}
+
+[[nodiscard]] s64 GetHostCNTFRQ() noexcept {
+    u64 cntfrq_el0 = 0;
+#ifdef ANDROID
+    std::string_view board{""};
+    char buffer[PROP_VALUE_MAX];
+    int len{__system_property_get("ro.product.board", buffer)};
+    board = std::string_view(buffer, static_cast<size_t>(len));
+    if (board == "s5e9925") { // Exynos 2200
+        cntfrq_el0 = 25600000;
+    } else if (board == "exynos2100") { // Exynos 2100
+        cntfrq_el0 = 26000000;
+    } else if (board == "exynos9810") { // Exynos 9810
+        cntfrq_el0 = 26000000;
+    } else if (board == "s5e8825") { // Exynos 1280
+        cntfrq_el0 = 26000000;
+    } else {
+        asm volatile("mrs %[cntfrq_el0], cntfrq_el0" : [cntfrq_el0] "=r"(cntfrq_el0));
+    }
+    return cntfrq_el0;
+#else
+    asm volatile("mrs %[cntfrq_el0], cntfrq_el0" : [cntfrq_el0] "=r"(cntfrq_el0));
+    return cntfrq_el0;
 #endif
 }
 
+} // namespace
+
+WallClock::WallClock(bool invariant_, u64 rdtsc_frequency_) noexcept {
+    const u64 host_cntfrq = std::max<u64>(GetHostCNTFRQ(), 1);
+    ns_cntfrq_factor = GetFixedPointFactor(NsRatio::den, host_cntfrq);
+    us_cntfrq_factor = GetFixedPointFactor(UsRatio::den, host_cntfrq);
+    ms_cntfrq_factor = GetFixedPointFactor(MsRatio::den, host_cntfrq);
+    guest_cntfrq_factor = GetFixedPointFactor(CNTFRQ, host_cntfrq);
+    gputick_cntfrq_factor = GetFixedPointFactor(GPUTickFreq, host_cntfrq);
+}
+
+std::chrono::nanoseconds WallClock::GetTimeNS() const {
+    return std::chrono::nanoseconds{MultiplyHigh(GetUptime(), ns_cntfrq_factor)};
+}
+
+std::chrono::microseconds WallClock::GetTimeUS() const {
+    return std::chrono::microseconds{MultiplyHigh(GetUptime(), us_cntfrq_factor)};
+}
+
+std::chrono::milliseconds WallClock::GetTimeMS() const {
+    return std::chrono::milliseconds{MultiplyHigh(GetUptime(), ms_cntfrq_factor)};
+}
+
+s64 WallClock::GetCNTPCT() const {
+    return MultiplyHigh(GetUptime(), guest_cntfrq_factor);
+}
+
+s64 WallClock::GetGPUTick() const {
+    return MultiplyHigh(GetUptime(), gputick_cntfrq_factor);
+}
+
+s64 WallClock::GetUptime() const {
+    s64 cntvct_el0 = 0;
+    asm volatile(
+        "dsb ish\n\t"
+        "mrs %[cntvct_el0], cntvct_el0\n\t"
+        "dsb ish\n\t"
+        : [cntvct_el0] "=r"(cntvct_el0)
+    );
+    return cntvct_el0;
+}
+
+bool WallClock::IsNative() const {
+    return true;
+}
+#else
+WallClock::WallClock(bool invariant_, u64 rdtsc_frequency_) noexcept {}
+
+std::chrono::nanoseconds WallClock::GetTimeNS() const {
+    return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::system_clock::now().time_since_epoch());
+}
+
+std::chrono::microseconds WallClock::GetTimeUS() const {
+    return std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::system_clock::now().time_since_epoch());
+}
+
+std::chrono::milliseconds WallClock::GetTimeMS() const {
+    return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch());
+}
+
+s64 WallClock::GetCNTPCT() const {
+    return GetUptime() * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den;
+}
+
+s64 WallClock::GetGPUTick() const {
+    return GetUptime() * NsToGPUTickRatio::num / NsToGPUTickRatio::den;
+}
+
+s64 WallClock::GetUptime() const {
+    return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::steady_clock::now().time_since_epoch()).count();
+}
+
+bool WallClock::IsNative() const {
+    return false;
+}
+#endif
+
+// Wall clock MUST be initialized AFTER g_cpu_caps
+// C++ only guarantees ctor init in the order they appear in TU
+const WallClock g_wall_clock = [] {
+#if defined(ARCHITECTURE_x86_64)
+    auto const& caps = Common::g_cpu_caps;
+    return WallClock(caps.invariant_tsc && caps.tsc_frequency >= std::nano::den, caps.tsc_frequency);
+#elif defined(HAS_NCE)
+    return WallClock(false, 1);
+#else
+    return WallClock(true, 1);
+#endif
+}();
+
 } // namespace Common

src/common/cpu_features.h

@@ -1,11 +1,14 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
+// 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
 
 #pragma once
 
+#include <optional>
+#include <string_view>
 #include <chrono>
 #include <memory>
 #include <ratio>
@@ -107,11 +110,78 @@ protected:
     FactorType ms_cntfrq_factor;
     FactorType guest_cntfrq_factor;
     FactorType gputick_cntfrq_factor;
-#else
-
 #endif
 };
 
-[[nodiscard]] WallClock CreateOptimalClock() noexcept;
+#ifdef ARCHITECTURE_x86_64
+/// x86/x64 CPU capabilities that may be detected by this module
+struct CPUCaps {
+    enum class Manufacturer : u8 {
+        Unknown = 0,
+        Intel = 1,
+        AMD = 2,
+        Hygon = 3,
+    };
+
+    static Manufacturer ParseManufacturer(std::string_view brand_string);
+
+    Manufacturer manufacturer;
+    char brand_string[13];
+
+    char cpu_string[48];
+
+    u32 base_frequency;
+    u32 max_frequency;
+    u32 bus_frequency;
+
+    u32 tsc_crystal_ratio_denominator;
+    u32 tsc_crystal_ratio_numerator;
+    u32 crystal_frequency;
+    u64 tsc_frequency; // Derived from the above three values
+    u64 tsc_to_ns_ratio; // Derived
+
+    bool sse3 : 1;
+    bool ssse3 : 1;
+    bool sse4_1 : 1;
+    bool sse4_2 : 1;
+
+    bool avx : 1;
+    bool avx2 : 1;
+    bool avx512f : 1;
+    bool avx512dq : 1;
+    bool avx512cd : 1;
+    bool avx512bw : 1;
+    bool avx512vl : 1;
+    bool avx512vbmi : 1;
+    bool avx512bitalg : 1;
+
+    bool aes : 1;
+    bool bmi1 : 1;
+    bool bmi2 : 1;
+    bool f16c : 1;
+    bool fma : 1;
+    bool gfni : 1;
+    bool invariant_tsc : 1;
+    bool lzcnt : 1;
+    bool monitorx : 1;
+    bool movbe : 1;
+    bool pclmulqdq : 1;
+    bool popcnt : 1;
+    bool sha : 1;
+    bool waitpkg : 1;
+};
+#else
+struct CPUCaps {
+    bool padding;
+};
+#endif
+
+/// Detects CPU core count
+std::optional<int> GetProcessorCount();
+
+/// @brief Global cpu caps
+extern const CPUCaps g_cpu_caps;
+/// @brief Global wall clock
+extern const WallClock g_wall_clock;
 
 } // namespace Common

src/common/thread.cpp

@@ -38,13 +38,13 @@
 #include <unistd.h>
 #endif
 
+#include "common/cpu_features.h"
 #ifdef ARCHITECTURE_x86_64
 #ifdef _MSC_VER
 #include <intrin.h>
 #else
 #include <x86intrin.h>
 #endif
-#include "common/x64/cpu_detect.h"
 #include "common/x64/rdtsc.h"
 #endif
 #include "core/core_timing.h"
@@ -174,8 +174,7 @@ __attribute__((target("waitpkg,mwaitx")))
 bool Event::WaitFor(const std::chrono::nanoseconds time) {
     auto const start = Common::X64::FencedRDTSC();
     auto const& caps = Common::g_cpu_caps;
-    auto const ns_ratio = std::max<u64>(1, caps.tsc_frequency / 1'000);
-    [[maybe_unused]] auto const end = start + time.count() * ns_ratio;
+    [[maybe_unused]] auto const end = start + time.count() * caps.tsc_to_ns_ratio;
     if (caps.monitorx) {
         while (true) {
             // Armed monitor, as per manual, MWAITX must be conditional if the condition isn't satisfied
@@ -232,11 +231,22 @@ bool Event::WaitFor(const std::chrono::nanoseconds time) {
 }
 #else
 bool Event::WaitFor(const std::chrono::nanoseconds time) {
+#ifdef _WIN32
+    s64 rem = s64(time.count()); //98 years
+    while (!is_set.load() && rem > 0) {
+        Common::Windows::SleepForOneTick();
+        rem = s64(Common::g_wall_clock.GetGlobalTimeNs().count()) - s64(time.count());
+    }
+    if (is_set.load())
+        Reset();
+    return true;
+#else
     std::unique_lock lk{mutex};
     if (!condvar.wait_for(lk, time, [this] { return is_set.load(); }))
         return false;
     is_set = false;
     return true;
+#endif
 }
 #endif
 

src/common/wall_clock.cpp

@@ -1,195 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#include "common/steady_clock.h"
-#include "common/uint128.h"
-#include "common/wall_clock.h"
-
-#ifdef __ANDROID__
-#include <sys/system_properties.h>
-#endif
-#ifdef ARCHITECTURE_x86_64
-#include "common/x64/cpu_detect.h"
-#include "common/x64/rdtsc.h"
-#endif
-
-namespace Common {
-
-#if defined(ARCHITECTURE_x86_64)
-WallClock::WallClock(bool invariant_, u64 rdtsc_frequency_) noexcept
-    : rdtsc_frequency{rdtsc_frequency_}
-    , ns_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(NsRatio::den, rdtsc_frequency_) : 0}
-    , us_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(UsRatio::den, rdtsc_frequency_) : 0}
-    , ms_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(MsRatio::den, rdtsc_frequency_) : 0}
-    , cntpct_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(CNTFRQ, rdtsc_frequency_) : 0}
-    , gputick_rdtsc_factor{invariant_ ? GetFixedPoint64Factor(GPUTickFreq, rdtsc_frequency_) : 0}
-    , invariant{invariant_}
-{}
-
-std::chrono::nanoseconds WallClock::GetTimeNS() const {
-    if (!invariant)
-        return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::system_clock::now().time_since_epoch());
-    return std::chrono::nanoseconds{MultiplyHigh(GetUptime(), ns_rdtsc_factor)};
-}
-
-std::chrono::microseconds WallClock::GetTimeUS() const {
-    if (!invariant)
-        return std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::system_clock::now().time_since_epoch());
-    return std::chrono::microseconds{MultiplyHigh(GetUptime(), us_rdtsc_factor)};
-}
-
-std::chrono::milliseconds WallClock::GetTimeMS() const {
-    if (!invariant)
-        return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch());
-    return std::chrono::milliseconds{MultiplyHigh(GetUptime(), ms_rdtsc_factor)};
-}
-
-s64 WallClock::GetCNTPCT() const {
-    if (!invariant)
-        return GetUptime() * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den;
-    return MultiplyHigh(GetUptime(), cntpct_rdtsc_factor);
-}
-
-s64 WallClock::GetGPUTick() const {
-    if (!invariant)
-        return GetUptime() * NsToGPUTickRatio::num / NsToGPUTickRatio::den;
-    return MultiplyHigh(GetUptime(), gputick_rdtsc_factor);
-}
-
-s64 WallClock::GetUptime() const {
-    if (!invariant)
-        return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::steady_clock::now().time_since_epoch()).count();
-    return s64(Common::X64::FencedRDTSC());
-}
-
-bool WallClock::IsNative() const {
-    return invariant;
-}
-#elif defined(HAS_NCE)
-namespace {
-
-[[nodiscard]] WallClock::FactorType GetFixedPointFactor(u64 num, u64 den) noexcept {
-    return (WallClock::FactorType(num) << 64) / den;
-}
-
-[[nodiscard]] u64 MultiplyHigh(u64 m, WallClock::FactorType factor) noexcept {
-    return static_cast<u64>((m * factor) >> 64);
-}
-
-[[nodiscard]] s64 GetHostCNTFRQ() noexcept {
-    u64 cntfrq_el0 = 0;
-#ifdef ANDROID
-    std::string_view board{""};
-    char buffer[PROP_VALUE_MAX];
-    int len{__system_property_get("ro.product.board", buffer)};
-    board = std::string_view(buffer, static_cast<size_t>(len));
-    if (board == "s5e9925") { // Exynos 2200
-        cntfrq_el0 = 25600000;
-    } else if (board == "exynos2100") { // Exynos 2100
-        cntfrq_el0 = 26000000;
-    } else if (board == "exynos9810") { // Exynos 9810
-        cntfrq_el0 = 26000000;
-    } else if (board == "s5e8825") { // Exynos 1280
-        cntfrq_el0 = 26000000;
-    } else {
-        asm volatile("mrs %[cntfrq_el0], cntfrq_el0" : [cntfrq_el0] "=r"(cntfrq_el0));
-    }
-    return cntfrq_el0;
-#else
-    asm volatile("mrs %[cntfrq_el0], cntfrq_el0" : [cntfrq_el0] "=r"(cntfrq_el0));
-    return cntfrq_el0;
-#endif
-}
-
-} // namespace
-
-WallClock::WallClock(bool invariant_, u64 rdtsc_frequency_) noexcept {
-    const u64 host_cntfrq = std::max<u64>(GetHostCNTFRQ(), 1);
-    ns_cntfrq_factor = GetFixedPointFactor(NsRatio::den, host_cntfrq);
-    us_cntfrq_factor = GetFixedPointFactor(UsRatio::den, host_cntfrq);
-    ms_cntfrq_factor = GetFixedPointFactor(MsRatio::den, host_cntfrq);
-    guest_cntfrq_factor = GetFixedPointFactor(CNTFRQ, host_cntfrq);
-    gputick_cntfrq_factor = GetFixedPointFactor(GPUTickFreq, host_cntfrq);
-}
-
-std::chrono::nanoseconds WallClock::GetTimeNS() const {
-    return std::chrono::nanoseconds{MultiplyHigh(GetUptime(), ns_cntfrq_factor)};
-}
-
-std::chrono::microseconds WallClock::GetTimeUS() const {
-    return std::chrono::microseconds{MultiplyHigh(GetUptime(), us_cntfrq_factor)};
-}
-
-std::chrono::milliseconds WallClock::GetTimeMS() const {
-    return std::chrono::milliseconds{MultiplyHigh(GetUptime(), ms_cntfrq_factor)};
-}
-
-s64 WallClock::GetCNTPCT() const {
-    return MultiplyHigh(GetUptime(), guest_cntfrq_factor);
-}
-
-s64 WallClock::GetGPUTick() const {
-    return MultiplyHigh(GetUptime(), gputick_cntfrq_factor);
-}
-
-s64 WallClock::GetUptime() const {
-    s64 cntvct_el0 = 0;
-    asm volatile(
-        "dsb ish\n\t"
-        "mrs %[cntvct_el0], cntvct_el0\n\t"
-        "dsb ish\n\t"
-        : [cntvct_el0] "=r"(cntvct_el0)
-    );
-    return cntvct_el0;
-}
-
-bool WallClock::IsNative() const {
-    return true;
-}
-#else
-WallClock::WallClock(bool invariant_, u64 rdtsc_frequency_) noexcept {}
-
-std::chrono::nanoseconds WallClock::GetTimeNS() const {
-    return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::system_clock::now().time_since_epoch());
-}
-
-std::chrono::microseconds WallClock::GetTimeUS() const {
-    return std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::system_clock::now().time_since_epoch());
-}
-
-std::chrono::milliseconds WallClock::GetTimeMS() const {
-    return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch());
-}
-
-s64 WallClock::GetCNTPCT() const {
-    return GetUptime() * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den;
-}
-
-s64 WallClock::GetGPUTick() const {
-    return GetUptime() * NsToGPUTickRatio::num / NsToGPUTickRatio::den;
-}
-
-s64 WallClock::GetUptime() const {
-    return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::steady_clock::now().time_since_epoch()).count();
-}
-
-bool WallClock::IsNative() const {
-    return false;
-}
-#endif
-
-WallClock CreateOptimalClock() noexcept {
-#if defined(ARCHITECTURE_x86_64)
-    auto const& caps = Common::g_cpu_caps;
-    return WallClock(caps.invariant_tsc && caps.tsc_frequency >= std::nano::den, caps.tsc_frequency);
-#elif defined(HAS_NCE)
-    return WallClock(false, 1);
-#else
-    return WallClock(true, 1);
-#endif
-}
-
-} // namespace Common

src/common/x64/cpu_detect.h

@@ -1,79 +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
-
-#pragma once
-
-#include <optional>
-#include <string_view>
-#include "common/common_types.h"
-
-namespace Common {
-
-/// x86/x64 CPU capabilities that may be detected by this module
-struct CPUCaps {
-
-    enum class Manufacturer : u8 {
-        Unknown = 0,
-        Intel = 1,
-        AMD = 2,
-        Hygon = 3,
-    };
-
-    static Manufacturer ParseManufacturer(std::string_view brand_string);
-
-    Manufacturer manufacturer;
-    char brand_string[13];
-
-    char cpu_string[48];
-
-    u32 base_frequency;
-    u32 max_frequency;
-    u32 bus_frequency;
-
-    u32 tsc_crystal_ratio_denominator;
-    u32 tsc_crystal_ratio_numerator;
-    u32 crystal_frequency;
-    u64 tsc_frequency; // Derived from the above three values
-
-    bool sse3 : 1;
-    bool ssse3 : 1;
-    bool sse4_1 : 1;
-    bool sse4_2 : 1;
-
-    bool avx : 1;
-    bool avx2 : 1;
-    bool avx512f : 1;
-    bool avx512dq : 1;
-    bool avx512cd : 1;
-    bool avx512bw : 1;
-    bool avx512vl : 1;
-    bool avx512vbmi : 1;
-    bool avx512bitalg : 1;
-
-    bool aes : 1;
-    bool bmi1 : 1;
-    bool bmi2 : 1;
-    bool f16c : 1;
-    bool fma : 1;
-    bool gfni : 1;
-    bool invariant_tsc : 1;
-    bool lzcnt : 1;
-    bool monitorx : 1;
-    bool movbe : 1;
-    bool pclmulqdq : 1;
-    bool popcnt : 1;
-    bool sha : 1;
-    bool waitpkg : 1;
-};
-
-/// @brief Global cpu caps
-extern const CPUCaps g_cpu_caps;
-
-/// Detects CPU core count
-std::optional<int> GetProcessorCount();
-
-} // namespace Common

src/core/arm/nce/patcher.cpp

@@ -3,7 +3,7 @@
 
 #include <numeric>
 #include <bit>
-#include "common/wall_clock.h"
+#include "common/cpu_features.h"
 #include "common/alignment.h"
 #include "common/literals.h"
 #include "core/arm/nce/arm_nce.h"

src/core/core_timing.cpp

@@ -8,7 +8,8 @@
 #include <mutex>
 #include <string>
 #include <tuple>
-#include "common/x64/cpu_detect.h"
+#include "common/cpu_features.h"
+#include "common/cpu_features.h"
 
 #ifdef _WIN32
 #include "common/windows/timer_resolution.h"
@@ -44,8 +45,7 @@ struct CoreTiming::Event {
     }
 };
 
-CoreTiming::CoreTiming() : clock{Common::CreateOptimalClock()} {}
-
+CoreTiming::CoreTiming() = default;
 CoreTiming::~CoreTiming() {
     Reset();
 }
@@ -208,7 +208,7 @@ void CoreTiming::ResetTicks() {
 }
 
 u64 CoreTiming::GetClockTicks() const {
-    u64 fres = is_multicore ? clock.GetCNTPCT() : Common::WallClock::CPUTickToCNTPCT(cpu_ticks);
+    u64 fres = is_multicore ? Common::g_wall_clock.GetCNTPCT() : Common::WallClock::CPUTickToCNTPCT(cpu_ticks);
     if (auto const overclock = Settings::values.fast_cpu_time.GetValue(); overclock != Settings::CpuClock::Off) {
         fres = u64(f64(fres) * (1.7 + 0.3 * u32(overclock)));
     }
@@ -222,7 +222,7 @@ u64 CoreTiming::GetClockTicks() const {
 
 u64 CoreTiming::GetGPUTicks() const {
     return is_multicore
-        ? clock.GetGPUTick()
+        ? Common::g_wall_clock.GetGPUTick()
         : Common::WallClock::CPUTickToGPUTick(cpu_ticks);
 }
 
@@ -299,14 +299,14 @@ void CoreTiming::Reset() {
 /// @brief Returns current time in nanoseconds.
 std::chrono::nanoseconds CoreTiming::GetGlobalTimeNs() const noexcept {
     return is_multicore
-        ? clock.GetTimeNS()
+        ? Common::g_wall_clock.GetTimeNS()
         : std::chrono::nanoseconds{Common::WallClock::CPUTickToNS(cpu_ticks)};
 }
 
 /// @brief Returns current time in microseconds.
 std::chrono::microseconds CoreTiming::GetGlobalTimeUs() const noexcept {
     return is_multicore
-        ? clock.GetTimeUS()
+        ? Common::g_wall_clock.GetTimeUS()
         : std::chrono::microseconds{Common::WallClock::CPUTickToUS(cpu_ticks)};
 }
 

src/core/core_timing.h

@@ -19,7 +19,7 @@
 
 #include "common/common_types.h"
 #include "common/thread.h"
-#include "common/wall_clock.h"
+#include "common/cpu_features.h"
 
 namespace Core::Timing {
 
@@ -142,37 +142,28 @@ public:
 
     void Reset();
 
-    Common::WallClock clock;
-
+    using heap_t = boost::heap::fibonacci_heap<CoreTiming::Event, boost::heap::compare<std::greater<>>>;
+    heap_t event_queue;
     s64 global_timer = 0;
-
 #ifdef _WIN32
     s64 timer_resolution_ns;
 #endif
-
-    using heap_t =
-        boost::heap::fibonacci_heap<CoreTiming::Event, boost::heap::compare<std::greater<>>>;
-
-    heap_t event_queue;
     u64 event_fifo_id = 0;
-
+    s64 pause_end_time{};
+    /// Cycle timing
+    u64 cpu_ticks{};
+    s64 downcount{};
     Common::Event event{};
     Common::Event pause_event{};
+    std::function<void()> on_thread_init{};
+    std::jthread timer_thread;
     mutable std::mutex basic_lock;
     std::mutex advance_lock;
-    std::jthread timer_thread;
     std::atomic<bool> paused{};
     std::atomic<bool> paused_set{};
     std::atomic<bool> wait_set{};
     std::atomic<bool> has_started{};
-    std::function<void()> on_thread_init{};
-
     bool is_multicore{};
-    s64 pause_end_time{};
-
-    /// Cycle timing
-    u64 cpu_ticks{};
-    s64 downcount{};
 };
 
 /// Creates a core timing event with the given name and callback.

src/core/hle/service/nvnflinger/buffer_queue_producer.cpp

@@ -10,6 +10,7 @@
 #include "common/assert.h"
 #include "common/logging.h"
 #include "common/settings.h"
+#include "common/cpu_features.h"
 #include "core/hle/kernel/k_event.h"
 #include "core/hle/kernel/k_readable_event.h"
 #include "core/hle/kernel/kernel.h"
@@ -28,7 +29,6 @@ BufferQueueProducer::BufferQueueProducer(Service::KernelHelpers::ServiceContext&
                                          Service::Nvidia::NvCore::NvMap& nvmap_)
     : service_context{service_context_}, core{std::move(buffer_queue_core_)}
     , slots(core->slots)
-    , clock{Common::CreateOptimalClock()}
     , nvmap(nvmap_)
 {
     buffer_wait_event = service_context.CreateEvent("BufferQueue:WaitEvent");
@@ -488,7 +488,7 @@ Status BufferQueueProducer::QueueBuffer(s32 slot, const QueueBufferInput& input,
         slots[slot].buffer_state = BufferState::Queued;
         slots[slot].frame_number = core->frame_counter;
         slots[slot].queue_time = timestamp;
-        slots[slot].presentation_time = clock.GetTimeNS().count();
+        slots[slot].presentation_time = Common::g_wall_clock.GetTimeNS().count();
         slots[slot].fence = fence;
 
         item.slot = slot;

src/core/hle/service/nvnflinger/buffer_queue_producer.h

@@ -14,7 +14,7 @@
 #include <mutex>
 
 #include "common/common_funcs.h"
-#include "common/wall_clock.h"
+#include "common/cpu_features.h"
 #include "core/hle/service/nvdrv/nvdata.h"
 #include "core/hle/service/nvnflinger/binder.h"
 #include "core/hle/service/nvnflinger/buffer_queue_defs.h"
@@ -89,7 +89,6 @@ private:
     s32 next_callback_ticket{};
     s32 current_callback_ticket{};
     std::condition_variable_any callback_condition;
-    Common::WallClock clock;
     Service::Nvidia::NvCore::NvMap& nvmap;
 };
 

src/core/hle/service/psc/time/common.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -13,7 +13,7 @@
 #include "common/common_types.h"
 #include "common/intrusive_list.h"
 #include "common/uuid.h"
-#include "common/wall_clock.h"
+#include "common/cpu_features.h"
 #include "core/hle/kernel/k_event.h"
 #include "core/hle/service/kernel_helpers.h"
 #include "core/hle/service/psc/time/errors.h"

src/qt_common/qt_common.cpp

@@ -13,12 +13,9 @@
 #include "common/fs/path_util.h"
 #include "common/logging.h"
 #include "common/scm_rev.h"
+#include "common/cpu_features.h"
 #include "core/memory.h"
 
-#ifdef ARCHITECTURE_x86_64
-#include "common/x64/cpu_detect.h"
-#endif
-
 #include <QGuiApplication>
 #include <QStringLiteral>
 #include "core/frontend/emu_window.h"

src/video_core/host1x/vic.cpp

@@ -39,7 +39,7 @@ extern "C" {
 #include "video_core/textures/decoders.h"
 
 #if defined(ARCHITECTURE_x86_64)
-#include "common/x64/cpu_detect.h"
+#include "common/cpu_features.h"
 #endif
 
 #if defined(ARCHITECTURE_x86_64) \

src/yuzu/main_window.cpp

@@ -124,7 +124,7 @@ static FileSys::VirtualFile VfsDirectoryCreateFileWrapper(const FileSys::Virtual
 #include "common/string_util.h"
 
 #ifdef ARCHITECTURE_x86_64
-#include "common/x64/cpu_detect.h"
+#include "common/cpu_features.h"
 #endif
 
 // Core //