From dd12dd4c67dd4bc6e7a7d071b925afc38e687f8b Mon Sep 17 00:00:00 2001 From: Morph <39850852+Morph1984@users.noreply.github.com> Date: Sat, 22 Apr 2023 22:55:03 -0400 Subject: x64: Deduplicate RDTSC usage --- src/common/x64/rdtsc.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 src/common/x64/rdtsc.h (limited to 'src/common/x64/rdtsc.h') diff --git a/src/common/x64/rdtsc.h b/src/common/x64/rdtsc.h new file mode 100644 index 000000000..0ec4f52f9 --- /dev/null +++ b/src/common/x64/rdtsc.h @@ -0,0 +1,37 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#pragma once + +#ifdef _MSC_VER +#include +#endif + +#include "common/common_types.h" + +namespace Common::X64 { + +#ifdef _MSC_VER +__forceinline static u64 FencedRDTSC() { + _mm_lfence(); + _ReadWriteBarrier(); + const u64 result = __rdtsc(); + _mm_lfence(); + _ReadWriteBarrier(); + return result; +} +#else +static inline u64 FencedRDTSC() { + u64 eax; + u64 edx; + asm volatile("lfence\n\t" + "rdtsc\n\t" + "lfence\n\t" + : "=a"(eax), "=d"(edx)); + return (edx << 32) | eax; +} +#endif + +u64 EstimateRDTSCFrequency(); + +} // namespace Common::X64 -- cgit v1.2.3