1 files changed, 16 insertions, 0 deletions

diff --git a/nacl/cpucycles/amd64cpuinfo.c b/nacl/cpucycles/amd64cpuinfo.c
new file mode 100644
index 00000000..729f2612
--- /dev/null
+++ b/nacl/cpucycles/amd64cpuinfo.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include "osfreq.c"
+
+long long cpucycles_amd64cpuinfo(void)
+{
+  unsigned long long result;
+  asm volatile(".byte 15;.byte 49;shlq $32,%%rdx;orq %%rdx,%%rax"
+    : "=a" (result) ::  "%rdx");
+  return result;
+}
+
+long long cpucycles_amd64cpuinfo_persecond(void)
+{
+  return osfreq();
+}