suyu/src/core/core_timing_util.cpp
Lioncash 48d9d66dc5 core_timing: Rename CoreTiming namespace to Core::Timing
Places all of the timing-related functionality under the existing Core
namespace to keep things consistent, rather than having the timing
utilities sitting in its own completely separate namespace.
2019-02-12 12:42:17 -05:00

63 lines
2 KiB
C++

// Copyright 2008 Dolphin Emulator Project / 2017 Citra Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "core/core_timing_util.h"
#include <cinttypes>
#include <limits>
#include "common/logging/log.h"
namespace Core::Timing {
constexpr u64 MAX_VALUE_TO_MULTIPLY = std::numeric_limits<s64>::max() / BASE_CLOCK_RATE;
s64 usToCycles(s64 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;
}
s64 usToCycles(u64 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;
}
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;
}
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;
}
} // namespace Core::Timing