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x64: cpu_wait: Implement MWAITX for non-MSVC compilers

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Morph 2023-06-28 01:35:16 -04:00
parent 2b68a3cbbf
commit 295fc7d0f8
1 changed files with 10 additions and 0 deletions
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src/common/x64/cpu_wait.cpp
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@ -47,6 +47,16 @@ static void TPAUSE() {
const auto edx = static_cast<u32>(tsc >> 32); const auto edx = static_cast<u32>(tsc >> 32);
asm volatile("tpause %0" : : "r"(RequestC02State), "d"(edx), "a"(eax)); asm volatile("tpause %0" : : "r"(RequestC02State), "d"(edx), "a"(eax));
} }
static void MWAITX() {
static constexpr auto EnableWaitTimeFlag = 1U << 1;
static constexpr auto RequestC1State = 0U;
// monitor_var should be aligned to a cache line.
alignas(64) u64 monitor_var{};
asm volatile("monitorx" : : "a"(&monitor_var), "c"(0), "d"(0));
asm volatile("mwaitx" : : "a"(RequestC1State), "b"(PauseCycles), "c"(EnableWaitTimeFlag));
}
#endif #endif
void MicroSleep() { void MicroSleep() {