main.c

analog device vdsp branch prediction tutorial

/*
** Example of using PGO session IDs to indicate different builds of
** the same file.
*/

#include <ccblkfn.h>
#include <ctype.h>
#include <stdio.h>
#include <cycle_count.h>
#include "global.h"
#include "choices.h"

static const char data[] =
   "This example demonstrates how Profile-Guided Optimization can be "
   "affected by dual-core applications. This text will be processed "
   "in two different ways, one by each core, but the code for both "
   "versions resides in the same function, conditionally compiled. "
   "PGO has to use session IDs to indicate which version of the file "
   "is being profiled."
  ;

int main(void)
{
  char c;
  const char *s = data;
  bool in_word = false;
  int nAZ = 0, naz = 0, nx = 0;
  int nc = 0, nw = 0, nl = 0;
  cycle_t start_count, final_count;


#ifndef COREB
  adi_core_b_enable();	/* start Core B running */
#endif
  START_CYCLE_COUNT(start_count)
  for (c = *s++; c; c = *s++) {
#ifdef COREA
    if (EXPRA(isspace(c))) {
      in_word = false;
      if (EXPRB(c == '\n'))
        nl++;
    } else {
      if (EXPRC(!in_word)) {
        in_word = true;
        nw++;
      }
    }
    nc++;
#endif /* COREA */
#ifdef COREB
    if (EXPRA(isupper(c)))
      nAZ++;
    else if (EXPRB(islower(c)))
      naz++;
    else
      nx++;
#endif /* COREB */
  }
  STOP_CYCLE_COUNT(final_count, start_count)

#ifdef COREA
  v_nw = nw;
  v_nc = nc;
  v_nl = nl;
  while (!core_b_finished)
    ;
  printf("nl = %d, nw = %d, nc = %d\n"
         "nAZ = %d, naz = %d, nx = %d\n",
         v_nl, v_nw, v_nc, v_nAZ, v_naz, v_nx);
  PRINT_CYCLES("Core A cycles: ", final_count)
  PRINT_CYCLES("Core B cycles: ", v_final_count)
  return 0;
#endif
#ifdef COREB
  v_nAZ = nAZ;
  v_naz = naz;
  v_nx = nx;
  v_final_count = final_count;
  core_b_finished = true;
  while (true) ;
#endif
}