x64: cpu_wait: Implement MWAITX for non-MSVC compilers
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@ -47,6 +47,16 @@ static void TPAUSE() {
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const auto edx = static_cast<u32>(tsc >> 32);
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asm volatile("tpause %0" : : "r"(RequestC02State), "d"(edx), "a"(eax));
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}
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static void MWAITX() {
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static constexpr auto EnableWaitTimeFlag = 1U << 1;
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static constexpr auto RequestC1State = 0U;
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// monitor_var should be aligned to a cache line.
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alignas(64) u64 monitor_var{};
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asm volatile("monitorx" : : "a"(&monitor_var), "c"(0), "d"(0));
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asm volatile("mwaitx" : : "a"(RequestC1State), "b"(PauseCycles), "c"(EnableWaitTimeFlag));
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}
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#endif
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void MicroSleep() {
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