mirror of https://git.suyu.dev/suyu/suyu
Merge pull request #5121 from bunnei/optimize-core-timing
core: Optimize core timing utility functions to avoid unnecessary mathmerge-requests/60/head
bunnei
GitHub
commit
6be0975bf2
@ -1,71 +0,0 @@
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// Copyright 2019 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#ifdef _MSC_VER
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#include <intrin.h>
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#pragma intrinsic(_umul128)
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#pragma intrinsic(_udiv128)
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#endif
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#include <cstring>
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#include "common/uint128.h"
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namespace Common {
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#ifdef _MSC_VER
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u64 MultiplyAndDivide64(u64 a, u64 b, u64 d) {
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u128 r{};
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r[0] = _umul128(a, b, &r[1]);
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u64 remainder;
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#if _MSC_VER < 1923
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return udiv128(r[1], r[0], d, &remainder);
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#else
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return _udiv128(r[1], r[0], d, &remainder);
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#endif
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}
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#else
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u64 MultiplyAndDivide64(u64 a, u64 b, u64 d) {
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const u64 diva = a / d;
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const u64 moda = a % d;
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const u64 divb = b / d;
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const u64 modb = b % d;
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return diva * b + moda * divb + moda * modb / d;
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}
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#endif
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u128 Multiply64Into128(u64 a, u64 b) {
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u128 result;
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#ifdef _MSC_VER
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result[0] = _umul128(a, b, &result[1]);
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#else
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unsigned __int128 tmp = a;
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tmp *= b;
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std::memcpy(&result, &tmp, sizeof(u128));
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#endif
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return result;
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}
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std::pair<u64, u64> Divide128On32(u128 dividend, u32 divisor) {
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u64 remainder = dividend[0] % divisor;
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u64 accum = dividend[0] / divisor;
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if (dividend[1] == 0)
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return {accum, remainder};
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// We ignore dividend[1] / divisor as that overflows
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const u64 first_segment = (dividend[1] % divisor) << 32;
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accum += (first_segment / divisor) << 32;
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const u64 second_segment = (first_segment % divisor) << 32;
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accum += (second_segment / divisor);
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remainder += second_segment % divisor;
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if (remainder >= divisor) {
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accum++;
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remainder -= divisor;
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}
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return {accum, remainder};
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}
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} // namespace Common
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@ -1,84 +0,0 @@
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// Copyright 2008 Dolphin Emulator Project / 2017 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "core/core_timing_util.h"
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#include <cinttypes>
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#include <limits>
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#include "common/logging/log.h"
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#include "common/uint128.h"
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#include "core/hardware_properties.h"
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namespace Core::Timing {
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constexpr u64 MAX_VALUE_TO_MULTIPLY = std::numeric_limits<s64>::max() / Hardware::BASE_CLOCK_RATE;
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s64 msToCycles(std::chrono::milliseconds ms) {
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if (static_cast<u64>(ms.count() / 1000) > MAX_VALUE_TO_MULTIPLY) {
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LOG_ERROR(Core_Timing, "Integer overflow, use max value");
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return std::numeric_limits<s64>::max();
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}
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if (static_cast<u64>(ms.count()) > MAX_VALUE_TO_MULTIPLY) {
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LOG_DEBUG(Core_Timing, "Time very big, do rounding");
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return Hardware::BASE_CLOCK_RATE * (ms.count() / 1000);
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}
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return (Hardware::BASE_CLOCK_RATE * ms.count()) / 1000;
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}
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s64 usToCycles(std::chrono::microseconds us) {
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if (static_cast<u64>(us.count() / 1000000) > MAX_VALUE_TO_MULTIPLY) {
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LOG_ERROR(Core_Timing, "Integer overflow, use max value");
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return std::numeric_limits<s64>::max();
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}
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if (static_cast<u64>(us.count()) > MAX_VALUE_TO_MULTIPLY) {
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LOG_DEBUG(Core_Timing, "Time very big, do rounding");
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return Hardware::BASE_CLOCK_RATE * (us.count() / 1000000);
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}
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return (Hardware::BASE_CLOCK_RATE * us.count()) / 1000000;
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}
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s64 nsToCycles(std::chrono::nanoseconds ns) {
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const u128 temporal = Common::Multiply64Into128(ns.count(), Hardware::BASE_CLOCK_RATE);
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return Common::Divide128On32(temporal, static_cast<u32>(1000000000)).first;
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}
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u64 msToClockCycles(std::chrono::milliseconds ns) {
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const u128 temp = Common::Multiply64Into128(ns.count(), Hardware::CNTFREQ);
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return Common::Divide128On32(temp, 1000).first;
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}
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u64 usToClockCycles(std::chrono::microseconds ns) {
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const u128 temp = Common::Multiply64Into128(ns.count(), Hardware::CNTFREQ);
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return Common::Divide128On32(temp, 1000000).first;
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}
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u64 nsToClockCycles(std::chrono::nanoseconds ns) {
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const u128 temp = Common::Multiply64Into128(ns.count(), Hardware::CNTFREQ);
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return Common::Divide128On32(temp, 1000000000).first;
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}
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u64 CpuCyclesToClockCycles(u64 ticks) {
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const u128 temporal = Common::Multiply64Into128(ticks, Hardware::CNTFREQ);
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return Common::Divide128On32(temporal, static_cast<u32>(Hardware::BASE_CLOCK_RATE)).first;
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}
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std::chrono::milliseconds CyclesToMs(s64 cycles) {
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const u128 temporal = Common::Multiply64Into128(cycles, 1000);
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u64 ms = Common::Divide128On32(temporal, static_cast<u32>(Hardware::BASE_CLOCK_RATE)).first;
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return std::chrono::milliseconds(ms);
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}
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std::chrono::nanoseconds CyclesToNs(s64 cycles) {
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const u128 temporal = Common::Multiply64Into128(cycles, 1000000000);
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u64 ns = Common::Divide128On32(temporal, static_cast<u32>(Hardware::BASE_CLOCK_RATE)).first;
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return std::chrono::nanoseconds(ns);
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}
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std::chrono::microseconds CyclesToUs(s64 cycles) {
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const u128 temporal = Common::Multiply64Into128(cycles, 1000000);
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u64 us = Common::Divide128On32(temporal, static_cast<u32>(Hardware::BASE_CLOCK_RATE)).first;
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return std::chrono::microseconds(us);
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}
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} // namespace Core::Timing
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@ -1,24 +1,59 @@
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// Copyright 2008 Dolphin Emulator Project / 2017 Citra Emulator Project
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// Licensed under GPLv2+
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <chrono>
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#include "common/common_types.h"
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#include "core/hardware_properties.h"
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namespace Core::Timing {
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s64 msToCycles(std::chrono::milliseconds ms);
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s64 usToCycles(std::chrono::microseconds us);
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s64 nsToCycles(std::chrono::nanoseconds ns);
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u64 msToClockCycles(std::chrono::milliseconds ns);
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u64 usToClockCycles(std::chrono::microseconds ns);
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u64 nsToClockCycles(std::chrono::nanoseconds ns);
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std::chrono::milliseconds CyclesToMs(s64 cycles);
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std::chrono::nanoseconds CyclesToNs(s64 cycles);
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std::chrono::microseconds CyclesToUs(s64 cycles);
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namespace detail {
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constexpr u64 CNTFREQ_ADJUSTED = Hardware::CNTFREQ / 1000;
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constexpr u64 BASE_CLOCK_RATE_ADJUSTED = Hardware::BASE_CLOCK_RATE / 1000;
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} // namespace detail
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u64 CpuCyclesToClockCycles(u64 ticks);
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[[nodiscard]] constexpr s64 msToCycles(std::chrono::milliseconds ms) {
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return ms.count() * detail::BASE_CLOCK_RATE_ADJUSTED;
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}
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[[nodiscard]] constexpr s64 usToCycles(std::chrono::microseconds us) {
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return us.count() * detail::BASE_CLOCK_RATE_ADJUSTED / 1000;
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}
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[[nodiscard]] constexpr s64 nsToCycles(std::chrono::nanoseconds ns) {
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return ns.count() * detail::BASE_CLOCK_RATE_ADJUSTED / 1000000;
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}
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[[nodiscard]] constexpr u64 msToClockCycles(std::chrono::milliseconds ms) {
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return static_cast<u64>(ms.count()) * detail::CNTFREQ_ADJUSTED;
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}
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[[nodiscard]] constexpr u64 usToClockCycles(std::chrono::microseconds us) {
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return us.count() * detail::CNTFREQ_ADJUSTED / 1000;
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}
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[[nodiscard]] constexpr u64 nsToClockCycles(std::chrono::nanoseconds ns) {
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return ns.count() * detail::CNTFREQ_ADJUSTED / 1000000;
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}
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[[nodiscard]] constexpr u64 CpuCyclesToClockCycles(u64 ticks) {
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return ticks * detail::CNTFREQ_ADJUSTED / detail::BASE_CLOCK_RATE_ADJUSTED;
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}
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[[nodiscard]] constexpr std::chrono::milliseconds CyclesToMs(s64 cycles) {
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return std::chrono::milliseconds(cycles / detail::BASE_CLOCK_RATE_ADJUSTED);
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}
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[[nodiscard]] constexpr std::chrono::nanoseconds CyclesToNs(s64 cycles) {
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return std::chrono::nanoseconds(cycles * 1000000 / detail::BASE_CLOCK_RATE_ADJUSTED);
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}
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[[nodiscard]] constexpr std::chrono::microseconds CyclesToUs(s64 cycles) {
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return std::chrono::microseconds(cycles * 1000 / detail::BASE_CLOCK_RATE_ADJUSTED);
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}
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} // namespace Core::Timing
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