[core/core_timing] better MWAITX and WAITPKG delays (#3984)

This implements MWAITX and WAITPKG extensions (umonitor, mwait) for CPUs that support them.

Reduces wait times and bypasses the timing stuff from the OS that is slow (windows notably). generally it should answer within 0.2 to 0.5 microsecs (since most requests wait for that long).

Also does a general rework of static ctors and stuff

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3984
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>

1 files changed, 0 insertions, 197 deletions

diff --git a/src/common/wall_clock.cpp b/src/common/wall_clock.cpp
deleted file mode 100644
index c06f9b6318..0000000000
--- a/src/common/wall_clock.cpp
+++ /dev/null
@@ -1,197 +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
-    : invariant{invariant_}
-    , rdtsc_frequency{rdtsc_frequency_}
-    , ns_rdtsc_factor{invariant_ ? 0 : GetFixedPoint64Factor(NsRatio::den, rdtsc_frequency_)}
-    , us_rdtsc_factor{invariant_ ? 0 : GetFixedPoint64Factor(UsRatio::den, rdtsc_frequency_)}
-    , ms_rdtsc_factor{invariant_ ? 0 : GetFixedPoint64Factor(MsRatio::den, rdtsc_frequency_)}
-    , cntpct_rdtsc_factor{invariant_ ? 0 : GetFixedPoint64Factor(CNTFRQ, rdtsc_frequency_)}
-    , gputick_rdtsc_factor{invariant_ ? 0 : GetFixedPoint64Factor(GPUTickFreq, rdtsc_frequency_)}
-{}
-
-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 {
-    if (invariant)
-        return false;
-    return true;
-}
-#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 = GetCPUCaps();
-    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