TempleOSTS_130315.ISO

TempleOS/Demo/TimeIns.CPP

@@ -0,0 +1,44 @@
+/*
+This program allows you to measure the
+timing of various instructions.
+Don't be surprised by odd results
+because the CPU does instructions in
+parallel sometimes and a simple
+instruction might take place in parallel
+with the loop instruction and it will
+report zero clock cycles.
+*/
+
+
+#define SAMPLE_SIZE	100000000
+
+
+U0 TimeIns()
+{
+  I64 i;
+  I64 start1,end1,start2,end2,overhead_time,test_time;
+  F64 reg d=5.0; //Use the reg directive to designate register vars
+  Bool old_preempt=Preempt(OFF);
+
+//Measure Loop Overhead
+  start1=GetTimeStamp;
+  for (i=0;i<SAMPLE_SIZE;i++);
+  end1=GetTimeStamp;
+  overhead_time=end1-start1;
+
+
+  start2=GetTimeStamp;
+  for (i=0;i<SAMPLE_SIZE;i++) {
+#exe {OPassTraceMask(0b1000000000);OTrace(ON);};
+//Put your test instructions here.
+    d*=1.00001;
+#exe {OTrace(OFF);};
+  }
+  end2=GetTimeStamp;
+  test_time=end2-start2;
+
+  "\n\n\nCycles %10.5f\n",ToF64(test_time-overhead_time)/SAMPLE_SIZE;
+  Preempt(old_preempt);
+}
+
+TimeIns;