diff options
author | B3n30 <bene_thomas@web.de> | 2017-11-25 14:56:57 +0100 |
---|---|---|
committer | bunnei <bunneidev@gmail.com> | 2018-01-09 01:10:25 +0100 |
commit | 82151d407d8021fa8865cf8dd51c4d5cf0a4b702 (patch) | |
tree | 739df280fddbecb50e1a2fa690abe8749486ea2d /src/core/core_timing.h | |
parent | IPC: Make DuplicateSession return the Domain instead of the Session if the request was made on a Domain interface. (diff) | |
download | yuzu-82151d407d8021fa8865cf8dd51c4d5cf0a4b702.tar yuzu-82151d407d8021fa8865cf8dd51c4d5cf0a4b702.tar.gz yuzu-82151d407d8021fa8865cf8dd51c4d5cf0a4b702.tar.bz2 yuzu-82151d407d8021fa8865cf8dd51c4d5cf0a4b702.tar.lz yuzu-82151d407d8021fa8865cf8dd51c4d5cf0a4b702.tar.xz yuzu-82151d407d8021fa8865cf8dd51c4d5cf0a4b702.tar.zst yuzu-82151d407d8021fa8865cf8dd51c4d5cf0a4b702.zip |
Diffstat (limited to '')
-rw-r--r-- | src/core/core_timing.h | 201 |
1 files changed, 124 insertions, 77 deletions
diff --git a/src/core/core_timing.h b/src/core/core_timing.h index 92c811af6..46ddcd18b 100644 --- a/src/core/core_timing.h +++ b/src/core/core_timing.h @@ -1,144 +1,191 @@ -// Copyright (c) 2012- PPSSPP Project / Dolphin Project. -// Licensed under GPLv2 or any later version +// Copyright 2008 Dolphin Emulator Project / 2017 Citra Emulator Project +// Licensed under GPLv2+ // Refer to the license.txt file included. #pragma once +/** + * This is a system to schedule events into the emulated machine's future. Time is measured + * in main CPU clock cycles. + * + * To schedule an event, you first have to register its type. This is where you pass in the + * callback. You then schedule events using the type id you get back. + * + * The int cyclesLate that the callbacks get is how many cycles late it was. + * So to schedule a new event on a regular basis: + * inside callback: + * ScheduleEvent(periodInCycles - cyclesLate, callback, "whatever") + */ + #include <functional> +#include <limits> #include <string> #include "common/common_types.h" +#include "common/logging/log.h" -// This is a system to schedule events into the emulated machine's future. Time is measured -// in main CPU clock cycles. - -// To schedule an event, you first have to register its type. This is where you pass in the -// callback. You then schedule events using the type id you get back. - -// See HW/SystemTimers.cpp for the main part of Dolphin's usage of this scheduler. - -// The int cycles_late that the callbacks get is how many cycles late it was. -// So to schedule a new event on a regular basis: -// inside callback: -// ScheduleEvent(periodInCycles - cycles_late, callback, "whatever") - -constexpr int BASE_CLOCK_RATE = 383778816; // Switch clock speed is 384MHz docked -extern int g_clock_rate_arm11; +// The timing we get from the assembly is 268,111,855.956 Hz +// It is possible that this number isn't just an integer because the compiler could have +// optimized the multiplication by a multiply-by-constant division. +// Rounding to the nearest integer should be fine +constexpr u64 BASE_CLOCK_RATE = 383778816; // Switch clock speed is 384MHz docked +constexpr u64 MAX_VALUE_TO_MULTIPLY = std::numeric_limits<s64>::max() / BASE_CLOCK_RATE; inline s64 msToCycles(int ms) { - return (s64)g_clock_rate_arm11 / 1000 * ms; + // since ms is int there is no way to overflow + return BASE_CLOCK_RATE * static_cast<s64>(ms) / 1000; } inline s64 msToCycles(float ms) { - return (s64)(g_clock_rate_arm11 * ms * (0.001f)); + return static_cast<s64>(BASE_CLOCK_RATE * (0.001f) * ms); } inline s64 msToCycles(double ms) { - return (s64)(g_clock_rate_arm11 * ms * (0.001)); + return static_cast<s64>(BASE_CLOCK_RATE * (0.001) * ms); } inline s64 usToCycles(float us) { - return (s64)(g_clock_rate_arm11 * us * (0.000001f)); + return static_cast<s64>(BASE_CLOCK_RATE * (0.000001f) * us); } inline s64 usToCycles(int us) { - return (g_clock_rate_arm11 / 1000000 * (s64)us); + return (BASE_CLOCK_RATE * static_cast<s64>(us) / 1000000); } inline s64 usToCycles(s64 us) { - return (g_clock_rate_arm11 / 1000000 * us); + if (us / 1000000 > MAX_VALUE_TO_MULTIPLY) { + LOG_ERROR(Core_Timing, "Integer overflow, use max value"); + return std::numeric_limits<s64>::max(); + } + if (us > MAX_VALUE_TO_MULTIPLY) { + LOG_DEBUG(Core_Timing, "Time very big, do rounding"); + return BASE_CLOCK_RATE * (us / 1000000); + } + return (BASE_CLOCK_RATE * us) / 1000000; } inline s64 usToCycles(u64 us) { - return (s64)(g_clock_rate_arm11 / 1000000 * us); + if (us / 1000000 > MAX_VALUE_TO_MULTIPLY) { + LOG_ERROR(Core_Timing, "Integer overflow, use max value"); + return std::numeric_limits<s64>::max(); + } + if (us > MAX_VALUE_TO_MULTIPLY) { + LOG_DEBUG(Core_Timing, "Time very big, do rounding"); + return BASE_CLOCK_RATE * static_cast<s64>(us / 1000000); + } + return (BASE_CLOCK_RATE * static_cast<s64>(us)) / 1000000; +} + +inline s64 nsToCycles(float ns) { + return static_cast<s64>(BASE_CLOCK_RATE * (0.000000001f) * ns); +} + +inline s64 nsToCycles(int ns) { + return BASE_CLOCK_RATE * static_cast<s64>(ns) / 1000000000; +} + +inline s64 nsToCycles(s64 ns) { + if (ns / 1000000000 > MAX_VALUE_TO_MULTIPLY) { + LOG_ERROR(Core_Timing, "Integer overflow, use max value"); + return std::numeric_limits<s64>::max(); + } + if (ns > MAX_VALUE_TO_MULTIPLY) { + LOG_DEBUG(Core_Timing, "Time very big, do rounding"); + return BASE_CLOCK_RATE * (ns / 1000000000); + } + return (BASE_CLOCK_RATE * ns) / 1000000000; +} + +inline s64 nsToCycles(u64 ns) { + if (ns / 1000000000 > MAX_VALUE_TO_MULTIPLY) { + LOG_ERROR(Core_Timing, "Integer overflow, use max value"); + return std::numeric_limits<s64>::max(); + } + if (ns > MAX_VALUE_TO_MULTIPLY) { + LOG_DEBUG(Core_Timing, "Time very big, do rounding"); + return BASE_CLOCK_RATE * (static_cast<s64>(ns) / 1000000000); + } + return (BASE_CLOCK_RATE * static_cast<s64>(ns)) / 1000000000; +} + +inline u64 cyclesToNs(s64 cycles) { + return cycles * 1000000000 / BASE_CLOCK_RATE; } inline s64 cyclesToUs(s64 cycles) { - return cycles / (g_clock_rate_arm11 / 1000000); + return cycles * 1000000 / BASE_CLOCK_RATE; } inline u64 cyclesToMs(s64 cycles) { - return cycles / (g_clock_rate_arm11 / 1000); + return cycles * 1000 / BASE_CLOCK_RATE; } namespace CoreTiming { + +/** + * CoreTiming begins at the boundary of timing slice -1. An initial call to Advance() is + * required to end slice -1 and start slice 0 before the first cycle of code is executed. + */ void Init(); void Shutdown(); -typedef void (*MHzChangeCallback)(); typedef std::function<void(u64 userdata, int cycles_late)> TimedCallback; /** -* Advance the CPU core by the specified number of ticks (e.g. to simulate CPU execution time) -* @param ticks Number of ticks to advance the CPU core -*/ -void AddTicks(u64 ticks); - + * This should only be called from the emu thread, if you are calling it any other thread, you are + * doing something evil + */ u64 GetTicks(); u64 GetIdleTicks(); -u64 GetGlobalTimeUs(); +void AddTicks(u64 ticks); + +struct EventType; /** - * Registers an event type with the specified name and callback - * @param name Name of the event type - * @param callback Function that will execute when this event fires - * @returns An identifier for the event type that was registered + * Returns the event_type identifier. if name is not unique, it will assert. */ -int RegisterEvent(const char* name, TimedCallback callback); -/// For save states. -void RestoreRegisterEvent(int event_type, const char* name, TimedCallback callback); +EventType* RegisterEvent(const std::string& name, TimedCallback callback); void UnregisterAllEvents(); -/// userdata MAY NOT CONTAIN POINTERS. userdata might get written and reloaded from disk, -/// when we implement state saves. /** - * Schedules an event to run after the specified number of cycles, - * with an optional parameter to be passed to the callback handler. - * This must be run ONLY from within the cpu thread. - * @param cycles_into_future The number of cycles after which this event will be fired - * @param event_type The event type to fire, as returned from RegisterEvent - * @param userdata Optional parameter to pass to the callback when fired + * After the first Advance, the slice lengths and the downcount will be reduced whenever an event + * is scheduled earlier than the current values. + * Scheduling from a callback will not update the downcount until the Advance() completes. */ -void ScheduleEvent(s64 cycles_into_future, int event_type, u64 userdata = 0); - -void ScheduleEvent_Threadsafe(s64 cycles_into_future, int event_type, u64 userdata = 0); -void ScheduleEvent_Threadsafe_Immediate(int event_type, u64 userdata = 0); +void ScheduleEvent(s64 cycles_into_future, const EventType* event_type, u64 userdata = 0); /** - * Unschedules an event with the specified type and userdata - * @param event_type The type of event to unschedule, as returned from RegisterEvent - * @param userdata The userdata that identifies this event, as passed to ScheduleEvent - * @returns The remaining ticks until the next invocation of the event callback + * This is to be called when outside of hle threads, such as the graphics thread, wants to + * schedule things to be executed on the main thread. + * Not that this doesn't change slice_length and thus events scheduled by this might be called + * with a delay of up to MAX_SLICE_LENGTH */ -s64 UnscheduleEvent(int event_type, u64 userdata); +void ScheduleEventThreadsafe(s64 cycles_into_future, const EventType* event_type, u64 userdata); + +void UnscheduleEvent(const EventType* event_type, u64 userdata); -s64 UnscheduleThreadsafeEvent(int event_type, u64 userdata); +/// We only permit one event of each type in the queue at a time. +void RemoveEvent(const EventType* event_type); +void RemoveNormalAndThreadsafeEvent(const EventType* event_type); -void RemoveEvent(int event_type); -void RemoveThreadsafeEvent(int event_type); -void RemoveAllEvents(int event_type); -bool IsScheduled(int event_type); -/// Runs any pending events and updates downcount for the next slice of cycles +/** Advance must be called at the beginning of dispatcher loops, not the end. Advance() ends + * the previous timing slice and begins the next one, you must Advance from the previous + * slice to the current one before executing any cycles. CoreTiming starts in slice -1 so an + * Advance() is required to initialize the slice length before the first cycle of emulated + * instructions is executed. + */ void Advance(); void MoveEvents(); -void ProcessFifoWaitEvents(); -void ForceCheck(); /// Pretend that the main CPU has executed enough cycles to reach the next event. -void Idle(int maxIdle = 0); +void Idle(); -/// Clear all pending events. This should ONLY be done on exit or state load. +/// Clear all pending events. This should ONLY be done on exit. void ClearPendingEvents(); -void LogPendingEvents(); - -/// Warning: not included in save states. -void RegisterAdvanceCallback(void (*callback)(int cycles_executed)); -void RegisterMHzChangeCallback(MHzChangeCallback callback); +void ForceExceptionCheck(s64 cycles); -std::string GetScheduledEventsSummary(); +u64 GetGlobalTimeUs(); -void SetClockFrequencyMHz(int cpu_mhz); -int GetClockFrequencyMHz(); -extern int g_slice_length; +int GetDowncount(); -} // namespace +} // namespace CoreTiming |