[core] Add volatile keyword to asm block in rdtsc (Haivision#2759).

arthenica · Jul 13, 2023 · 1737e96 · 1737e96
1 parent 61c7bed
commit 1737e96
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/srtcore/sync_posix.cpp b/srtcore/sync_posix.cpp
@@ -52,7 +52,7 @@ static void rdtsc(uint64_t& x)
     asm("mov %0=ar.itc" : "=r"(x)::"memory");
 #elif SRT_SYNC_CLOCK == SRT_SYNC_CLOCK_AMD64_RDTSC
     uint32_t lval, hval;
-    asm("rdtsc" : "=a"(lval), "=d"(hval));
+    asm volatile("rdtsc" : "=a"(lval), "=d"(hval));
     x = hval;
     x = (x << 32) | lval;
 #elif SRT_SYNC_CLOCK == SRT_SYNC_CLOCK_WINQPC