Added verbose flag

Author: prodromou87

.gitignore

@@ -0,0 +1,2 @@
+*.o
+src/predictor

src/main.c

@@ -23,6 +23,7 @@ usage()
   fprintf(stderr,"       bunzip -kc trace.bz2 | predictor <options>\n");
   fprintf(stderr," Options:\n");
   fprintf(stderr," --help       Print this message\n");
+  fprintf(stderr," --verbose    Print predictions on stdout\n");
   fprintf(stderr," --<type>     Branch prediction scheme:\n");
   fprintf(stderr,"    static\n"
                  "    gshare:<# ghistory>\n"
@@ -48,6 +49,8 @@ handle_option(char *arg)
     sscanf(arg+13,"%d:%d:%d", &ghistoryBits, &lhistoryBits, &pcIndexBits);
   } else if (!strcmp(arg,"--custom")) {
     bpType = CUSTOM;
+  } else if (!strcmp(arg,"--verbose")) {
+    verbose = 1;
   } else {
     return 0;
   }
@@ -80,6 +83,7 @@ main(int argc, char *argv[])
   // Set defaults
   stream = stdin;
   bpType = STATIC;
+  verbose = 0;
 
   // Process cmdline Arguments
   for (int i = 1; i < argc; ++i) {
@@ -111,9 +115,13 @@ main(int argc, char *argv[])
     num_branches++;
 
     // Make a prediction and compare with actual outcome
-    if (make_prediction(pc) != outcome) {
+    uint8_t prediction = make_prediction(pc);
+    if (prediction != outcome) {
       mispredictions++;
     }
+    if (verbose != 0) {
+      printf ("%d\n", prediction);
+    }
 
     // Train the predictor
     train_predictor(pc, outcome);

src/predictor.c

@@ -27,6 +27,7 @@ int ghistoryBits; // Number of bits used for Global History
 int lhistoryBits; // Number of bits used for Local History
 int pcIndexBits;  // Number of bits used for PC index
 int bpType;       // Branch Prediction Type
+int verbose;
 
 //------------------------------------//
 //      Predictor Data Structures     //

src/predictor.h

@@ -45,6 +45,7 @@ extern int ghistoryBits; // Number of bits used for Global History
 extern int lhistoryBits; // Number of bits used for Local History
 extern int pcIndexBits;  // Number of bits used for PC index
 extern int bpType;       // Branch Prediction Type
+extern int verbose;
 
 //------------------------------------//
 //    Predictor Function Prototypes   //