Merge pull request #60 from chiangkd/master

Fix incorrect clock calculation on macOS

Author: jserv

utils.c

@@ -48,7 +48,8 @@ static uint64_t semu_timer_clocksource(uint64_t freq)
     static mach_timebase_info_data_t t;
     if (t.denom == 0)
         (void) mach_timebase_info(&t);
-    return mult_frac(mach_absolute_time() * freq, t.numer, t.denom);
+    return mult_frac(mult_frac(mach_absolute_time(), freq, 1e9), t.numer,
+                     t.denom);
 #else
     return time(0) * freq;
 #endif