From 21bc2c14bc7408427a8b4851a7a3f15251f2afa8 Mon Sep 17 00:00:00 2001 From: Liam Date: Sun, 8 Oct 2023 11:32:32 -0400 Subject: common: add arm64 native clock --- src/common/CMakeLists.txt | 8 +++++ src/common/arm64/native_clock.cpp | 72 +++++++++++++++++++++++++++++++++++++++ src/common/arm64/native_clock.h | 47 +++++++++++++++++++++++++ src/common/wall_clock.cpp | 8 ++++- 4 files changed, 134 insertions(+), 1 deletion(-) create mode 100644 src/common/arm64/native_clock.cpp create mode 100644 src/common/arm64/native_clock.h diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt index 416203c59..8a1861051 100644 --- a/src/common/CMakeLists.txt +++ b/src/common/CMakeLists.txt @@ -189,6 +189,14 @@ if(ARCHITECTURE_x86_64) target_link_libraries(common PRIVATE xbyak::xbyak) endif() +if (ARCHITECTURE_arm64 AND (ANDROID OR LINUX)) + target_sources(common + PRIVATE + arm64/native_clock.cpp + arm64/native_clock.h + ) +endif() + if (MSVC) target_compile_definitions(common PRIVATE # The standard library doesn't provide any replacement for codecvt yet diff --git a/src/common/arm64/native_clock.cpp b/src/common/arm64/native_clock.cpp new file mode 100644 index 000000000..88fdba527 --- /dev/null +++ b/src/common/arm64/native_clock.cpp @@ -0,0 +1,72 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "common/arm64/native_clock.h" + +namespace Common::Arm64 { + +namespace { + +NativeClock::FactorType GetFixedPointFactor(u64 num, u64 den) { + return (static_cast(num) << 64) / den; +} + +u64 MultiplyHigh(u64 m, NativeClock::FactorType factor) { + return static_cast((m * factor) >> 64); +} + +} // namespace + +NativeClock::NativeClock() { + const u64 host_cntfrq = GetHostCNTFRQ(); + 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 NativeClock::GetTimeNS() const { + return std::chrono::nanoseconds{MultiplyHigh(GetHostTicksElapsed(), ns_cntfrq_factor)}; +} + +std::chrono::microseconds NativeClock::GetTimeUS() const { + return std::chrono::microseconds{MultiplyHigh(GetHostTicksElapsed(), us_cntfrq_factor)}; +} + +std::chrono::milliseconds NativeClock::GetTimeMS() const { + return std::chrono::milliseconds{MultiplyHigh(GetHostTicksElapsed(), ms_cntfrq_factor)}; +} + +u64 NativeClock::GetCNTPCT() const { + return MultiplyHigh(GetHostTicksElapsed(), guest_cntfrq_factor); +} + +u64 NativeClock::GetGPUTick() const { + return MultiplyHigh(GetHostTicksElapsed(), gputick_cntfrq_factor); +} + +u64 NativeClock::GetHostTicksNow() const { + u64 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; +} + +u64 NativeClock::GetHostTicksElapsed() const { + return GetHostTicksNow(); +} + +bool NativeClock::IsNative() const { + return true; +} + +u64 NativeClock::GetHostCNTFRQ() { + u64 cntfrq_el0 = 0; + asm("mrs %[cntfrq_el0], cntfrq_el0" : [cntfrq_el0] "=r"(cntfrq_el0)); + return cntfrq_el0; +} + +} // namespace Common::Arm64 diff --git a/src/common/arm64/native_clock.h b/src/common/arm64/native_clock.h new file mode 100644 index 000000000..a28b419f2 --- /dev/null +++ b/src/common/arm64/native_clock.h @@ -0,0 +1,47 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#include "common/wall_clock.h" + +namespace Common::Arm64 { + +class NativeClock final : public WallClock { +public: + explicit NativeClock(); + + std::chrono::nanoseconds GetTimeNS() const override; + + std::chrono::microseconds GetTimeUS() const override; + + std::chrono::milliseconds GetTimeMS() const override; + + u64 GetCNTPCT() const override; + + u64 GetGPUTick() const override; + + u64 GetHostTicksNow() const override; + + u64 GetHostTicksElapsed() const override; + + bool IsNative() const override; + + static u64 GetHostCNTFRQ(); + +public: + using FactorType = unsigned __int128; + + FactorType GetGuestCNTFRQFactor() const { + return guest_cntfrq_factor; + } + +private: + FactorType ns_cntfrq_factor; + FactorType us_cntfrq_factor; + FactorType ms_cntfrq_factor; + FactorType guest_cntfrq_factor; + FactorType gputick_cntfrq_factor; +}; + +} // namespace Common::Arm64 diff --git a/src/common/wall_clock.cpp b/src/common/wall_clock.cpp index 71e15ab4c..caca9a123 100644 --- a/src/common/wall_clock.cpp +++ b/src/common/wall_clock.cpp @@ -10,6 +10,10 @@ #include "common/x64/rdtsc.h" #endif +#if defined(ARCHITECTURE_arm64) && defined(__linux__) +#include "common/arm64/native_clock.h" +#endif + namespace Common { class StandardWallClock final : public WallClock { @@ -53,7 +57,7 @@ private: }; std::unique_ptr CreateOptimalClock() { -#ifdef ARCHITECTURE_x86_64 +#if defined(ARCHITECTURE_x86_64) const auto& caps = GetCPUCaps(); if (caps.invariant_tsc && caps.tsc_frequency >= std::nano::den) { @@ -64,6 +68,8 @@ std::unique_ptr CreateOptimalClock() { // - Is not more precise than 1 GHz (1ns resolution) return std::make_unique(); } +#elif defined(ARCHITECTURE_arm64) && defined(__linux__) + return std::make_unique(); #else return std::make_unique(); #endif -- cgit v1.2.3