Merge pull request #803 from MerryMage/core_timing_util
core_timing: Split off utility functions into core_timing_utilmaster
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657bd113e3
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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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namespace CoreTiming {
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constexpr u64 MAX_VALUE_TO_MULTIPLY = std::numeric_limits<s64>::max() / BASE_CLOCK_RATE;
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s64 usToCycles(s64 us) {
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if (us / 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 (us > MAX_VALUE_TO_MULTIPLY) {
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LOG_DEBUG(Core_Timing, "Time very big, do rounding");
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return BASE_CLOCK_RATE * (us / 1000000);
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}
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return (BASE_CLOCK_RATE * us) / 1000000;
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}
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s64 usToCycles(u64 us) {
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if (us / 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 (us > MAX_VALUE_TO_MULTIPLY) {
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LOG_DEBUG(Core_Timing, "Time very big, do rounding");
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return BASE_CLOCK_RATE * static_cast<s64>(us / 1000000);
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}
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return (BASE_CLOCK_RATE * static_cast<s64>(us)) / 1000000;
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}
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s64 nsToCycles(s64 ns) {
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if (ns / 1000000000 > 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 (ns > MAX_VALUE_TO_MULTIPLY) {
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LOG_DEBUG(Core_Timing, "Time very big, do rounding");
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return BASE_CLOCK_RATE * (ns / 1000000000);
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}
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return (BASE_CLOCK_RATE * ns) / 1000000000;
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}
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s64 nsToCycles(u64 ns) {
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if (ns / 1000000000 > 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 (ns > MAX_VALUE_TO_MULTIPLY) {
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LOG_DEBUG(Core_Timing, "Time very big, do rounding");
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return BASE_CLOCK_RATE * (static_cast<s64>(ns) / 1000000000);
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}
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return (BASE_CLOCK_RATE * static_cast<s64>(ns)) / 1000000000;
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}
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} // namespace CoreTiming
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@ -0,0 +1,64 @@
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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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#pragma once
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#include "common/common_types.h"
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namespace CoreTiming {
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// The below clock rate is based on Switch's clockspeed being widely known as 1.020GHz
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// The exact value used is of course unverified.
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constexpr u64 BASE_CLOCK_RATE = 1019215872; // Switch clock speed is 1020MHz un/docked
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inline s64 msToCycles(int ms) {
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// since ms is int there is no way to overflow
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return BASE_CLOCK_RATE * static_cast<s64>(ms) / 1000;
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}
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inline s64 msToCycles(float ms) {
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return static_cast<s64>(BASE_CLOCK_RATE * (0.001f) * ms);
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}
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inline s64 msToCycles(double ms) {
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return static_cast<s64>(BASE_CLOCK_RATE * (0.001) * ms);
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}
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inline s64 usToCycles(float us) {
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return static_cast<s64>(BASE_CLOCK_RATE * (0.000001f) * us);
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}
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inline s64 usToCycles(int us) {
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return (BASE_CLOCK_RATE * static_cast<s64>(us) / 1000000);
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}
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s64 usToCycles(s64 us);
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s64 usToCycles(u64 us);
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inline s64 nsToCycles(float ns) {
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return static_cast<s64>(BASE_CLOCK_RATE * (0.000000001f) * ns);
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}
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inline s64 nsToCycles(int ns) {
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return BASE_CLOCK_RATE * static_cast<s64>(ns) / 1000000000;
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}
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s64 nsToCycles(s64 ns);
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s64 nsToCycles(u64 ns);
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inline u64 cyclesToNs(s64 cycles) {
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return cycles * 1000000000 / BASE_CLOCK_RATE;
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}
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inline s64 cyclesToUs(s64 cycles) {
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return cycles * 1000000 / BASE_CLOCK_RATE;
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}
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inline u64 cyclesToMs(s64 cycles) {
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return cycles * 1000 / BASE_CLOCK_RATE;
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}
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} // namespace CoreTiming
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