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x64: Deduplicate RDTSC usage

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This commit is contained in:
Morph 2023-04-22 22:55:03 -04:00
parent 400286b7a0
commit 728048edfe
5 changed files with 82 additions and 19 deletions
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20
src/common/x64/cpu_wait.cpp
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@ -9,19 +9,11 @@
#include "common/x64/cpu_detect.h"
#include "common/x64/cpu_wait.h"
#include "common/x64/rdtsc.h"
namespace Common::X64 {
#ifdef _MSC_VER
__forceinline static u64 FencedRDTSC() {
_mm_lfence();
_ReadWriteBarrier();
const u64 result = __rdtsc();
_mm_lfence();
_ReadWriteBarrier();
return result;
}
__forceinline static void TPAUSE() {
// 100,000 cycles is a reasonable amount of time to wait to save on CPU resources.
// For reference:
@ -32,16 +24,6 @@ __forceinline static void TPAUSE() {
_tpause(0, FencedRDTSC() + PauseCycles);
}
#else
static 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;
}
static void TPAUSE() {
// 100,000 cycles is a reasonable amount of time to wait to save on CPU resources.
// For reference: