907507886d
Allows us to directly calculate the GPU tick without double conversion to and from the host clock tick.
51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "common/uint128.h"
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#include "common/x64/native_clock.h"
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#include "common/x64/rdtsc.h"
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namespace Common::X64 {
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NativeClock::NativeClock(u64 rdtsc_frequency_)
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: start_ticks{FencedRDTSC()}, rdtsc_frequency{rdtsc_frequency_},
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ns_rdtsc_factor{GetFixedPoint64Factor(NsRatio::den, rdtsc_frequency)},
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us_rdtsc_factor{GetFixedPoint64Factor(UsRatio::den, rdtsc_frequency)},
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ms_rdtsc_factor{GetFixedPoint64Factor(MsRatio::den, rdtsc_frequency)},
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cntpct_rdtsc_factor{GetFixedPoint64Factor(CNTFRQ, rdtsc_frequency)},
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gputick_rdtsc_factor{GetFixedPoint64Factor(GPUTickFreq, rdtsc_frequency)} {}
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std::chrono::nanoseconds NativeClock::GetTimeNS() const {
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return std::chrono::nanoseconds{MultiplyHigh(GetHostTicksElapsed(), ns_rdtsc_factor)};
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}
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std::chrono::microseconds NativeClock::GetTimeUS() const {
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return std::chrono::microseconds{MultiplyHigh(GetHostTicksElapsed(), us_rdtsc_factor)};
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}
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std::chrono::milliseconds NativeClock::GetTimeMS() const {
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return std::chrono::milliseconds{MultiplyHigh(GetHostTicksElapsed(), ms_rdtsc_factor)};
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}
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u64 NativeClock::GetCNTPCT() const {
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return MultiplyHigh(GetHostTicksElapsed(), cntpct_rdtsc_factor);
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}
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u64 NativeClock::GetGPUTick() const {
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return MultiplyHigh(GetHostTicksElapsed(), gputick_rdtsc_factor);
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}
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u64 NativeClock::GetHostTicksNow() const {
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return FencedRDTSC();
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}
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u64 NativeClock::GetHostTicksElapsed() const {
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return FencedRDTSC() - start_ticks;
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}
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bool NativeClock::IsNative() const {
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return true;
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}
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} // namespace Common::X64
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