tools/perf/arch/x86/util/tsc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3
   4 #include "../../../util/tsc.h"
   5
   6 u64 rdtsc(void)
   7 {
   8         unsigned int low, high;
   9
  10         asm volatile("rdtsc" : "=a" (low), "=d" (high));
  11
  12         return low | ((u64)high) << 32;
  13 }