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authorbunnei <bunneidev@gmail.com>2018-07-25 20:09:31 +0200
committerGitHub <noreply@github.com>2018-07-25 20:09:31 +0200
commit657bd113e35edc9e36037c8529a1c1027c15c5fd (patch)
treea8b6bd2227ba84cb4dd3d5a54d0c6d18a3d631d9 /src/core/core_timing_util.h
parentMerge pull request #802 from lioncash/unreach (diff)
parentcore_timing: Split off utility functions into core_timing_util (diff)
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Diffstat (limited to 'src/core/core_timing_util.h')
-rw-r--r--src/core/core_timing_util.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/src/core/core_timing_util.h b/src/core/core_timing_util.h
new file mode 100644
index 000000000..5c3718782
--- /dev/null
+++ b/src/core/core_timing_util.h
@@ -0,0 +1,64 @@
+// Copyright 2008 Dolphin Emulator Project / 2017 Citra Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace CoreTiming {
+
+// The below clock rate is based on Switch's clockspeed being widely known as 1.020GHz
+// The exact value used is of course unverified.
+constexpr u64 BASE_CLOCK_RATE = 1019215872; // Switch clock speed is 1020MHz un/docked
+
+inline s64 msToCycles(int 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 static_cast<s64>(BASE_CLOCK_RATE * (0.001f) * ms);
+}
+
+inline s64 msToCycles(double ms) {
+ return static_cast<s64>(BASE_CLOCK_RATE * (0.001) * ms);
+}
+
+inline s64 usToCycles(float us) {
+ return static_cast<s64>(BASE_CLOCK_RATE * (0.000001f) * us);
+}
+
+inline s64 usToCycles(int us) {
+ return (BASE_CLOCK_RATE * static_cast<s64>(us) / 1000000);
+}
+
+s64 usToCycles(s64 us);
+
+s64 usToCycles(u64 us);
+
+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;
+}
+
+s64 nsToCycles(s64 ns);
+
+s64 nsToCycles(u64 ns);
+
+inline u64 cyclesToNs(s64 cycles) {
+ return cycles * 1000000000 / BASE_CLOCK_RATE;
+}
+
+inline s64 cyclesToUs(s64 cycles) {
+ return cycles * 1000000 / BASE_CLOCK_RATE;
+}
+
+inline u64 cyclesToMs(s64 cycles) {
+ return cycles * 1000 / BASE_CLOCK_RATE;
+}
+
+} // namespace CoreTiming