x64: Simplify RDTSC on non-MSVC compilers
Co-Authored-By: liamwhite <liamwhite@users.noreply.github.com>
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@ -33,16 +33,13 @@ __forceinline static void TPAUSE() {
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}
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#else
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static u64 FencedRDTSC() {
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u64 result;
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u64 eax;
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u64 edx;
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asm volatile("lfence\n\t"
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"rdtsc\n\t"
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"shl $32, %%rdx\n\t"
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"or %%rdx, %0\n\t"
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"lfence"
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: "=a"(result)
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:
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: "rdx", "memory", "cc");
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return result;
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"lfence\n\t"
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: "=a"(eax), "=d"(edx));
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return (edx << 32) | eax;
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}
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static void TPAUSE() {
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@ -27,16 +27,13 @@ __forceinline static u64 FencedRDTSC() {
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}
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#else
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static u64 FencedRDTSC() {
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u64 result;
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u64 eax;
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u64 edx;
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asm volatile("lfence\n\t"
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"rdtsc\n\t"
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"shl $32, %%rdx\n\t"
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"or %%rdx, %0\n\t"
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"lfence"
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: "=a"(result)
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:
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: "rdx", "memory", "cc");
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return result;
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"lfence\n\t"
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: "=a"(eax), "=d"(edx));
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return (edx << 32) | eax;
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}
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#endif
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