LTCD_070816.ISO

LT/Demo/TimeIns.CPZ

@@ -0,0 +1,51 @@
+/*
+$FG,2$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.
+$FG$*/
+
+
+#define SAMPLE_SIZE	100000000
+
+
+void TimeIns()
+{
+  I8 i;
+  U8 start1,end1,start2,end2,overhead_time,test_time;
+  double reg d=5.0; //$FG,2$Use the $FG,4$reg$FG,2$ directive to designate register variables$FG$
+
+  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++) {
+$FG,4$#exe {OPassTraceMask(0b100000000);OTrace(ON);}
+//$FG,2$Put your test instructions here.$FG,4$
+    d*=1.00001;
+#exe {OTrace(OFF);}
+$FG$  }
+  end2=GetTimeStamp;
+  test_time=end2-start2;
+
+  PrintF("\r\n\r\n\r\nCycles %10.5f\r\n",
+    (test_time-overhead_time)*1.0/SAMPLE_SIZE);
+
+  Preempt(ON);
+}
+
+TimeIns;
+
+