From 44646e2ea0b87dffd9a1d175c53e3cea67bce344 Mon Sep 17 00:00:00 2001 From: MerryMage Date: Tue, 24 Jul 2018 11:03:24 +0100 Subject: core_timing: Split off utility functions into core_timing_util --- src/core/core_timing_util.cpp | 63 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/core/core_timing_util.cpp (limited to 'src/core/core_timing_util.cpp') diff --git a/src/core/core_timing_util.cpp b/src/core/core_timing_util.cpp new file mode 100644 index 000000000..73dea4edb --- /dev/null +++ b/src/core/core_timing_util.cpp @@ -0,0 +1,63 @@ +// 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 +#include +#include "common/logging/log.h" + +namespace CoreTiming { + +constexpr u64 MAX_VALUE_TO_MULTIPLY = std::numeric_limits::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::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::max(); + } + if (us > MAX_VALUE_TO_MULTIPLY) { + LOG_DEBUG(Core_Timing, "Time very big, do rounding"); + return BASE_CLOCK_RATE * static_cast(us / 1000000); + } + return (BASE_CLOCK_RATE * static_cast(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::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::max(); + } + if (ns > MAX_VALUE_TO_MULTIPLY) { + LOG_DEBUG(Core_Timing, "Time very big, do rounding"); + return BASE_CLOCK_RATE * (static_cast(ns) / 1000000000); + } + return (BASE_CLOCK_RATE * static_cast(ns)) / 1000000000; +} + +} // namespace CoreTiming -- cgit v1.2.3