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core_timing: Use CNTPCT as the guest CPU tick

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Previously, we were mixing the raw CPU frequency and CNTFRQ.
The raw CPU frequency (1020 MHz) should've never been used as CNTPCT (whose frequency is CNTFRQ) is the only counter available.
This commit is contained in:
Morph 2023-04-23 00:01:08 -04:00
parent bbd502f67a
commit 8e56a84566
14 changed files with 47 additions and 122 deletions
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17
src/common/wall_clock.h
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@ -38,6 +38,22 @@ public:
/// @returns Whether the clock directly uses the host's hardware clock.
virtual bool IsNative() const = 0;
static inline u64 NSToCNTPCT(u64 ns) {
return ns * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den;
}
static inline u64 USToCNTPCT(u64 us) {
return us * UsToCNTPCTRatio::num / UsToCNTPCTRatio::den;
}
static inline u64 CNTPCTToNS(u64 cntpct) {
return cntpct * NsToCNTPCTRatio::den / NsToCNTPCTRatio::num;
}
static inline u64 CNTPCTToUS(u64 cntpct) {
return cntpct * UsToCNTPCTRatio::den / UsToCNTPCTRatio::num;
}
protected:
using NsRatio = std::nano;
using UsRatio = std::micro;
@ -46,6 +62,7 @@ protected:
using NsToUsRatio = std::ratio_divide<std::nano, std::micro>;
using NsToMsRatio = std::ratio_divide<std::nano, std::milli>;
using NsToCNTPCTRatio = std::ratio<CNTFRQ, std::nano::den>;
using UsToCNTPCTRatio = std::ratio<CNTFRQ, std::micro::den>;
};
std::unique_ptr<WallClock> CreateOptimalClock();