gcc/testsuite/gcc.dg/pr42250.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 extern double log10 (double __x);
   5 extern double ceil (double __x);
   6 extern double floor (double __x);
   7 extern void free (void *__ptr);
   8 extern void *my_malloc (unsigned int);
   9 extern int num_rr_nodes;
  10 static float get_cblock_trans (int *num_inputs_to_cblock,
  11                                int max_inputs_to_cblock,
  12                                float trans_cblock_to_lblock_buf,
  13                                float trans_sram_bit);
  14 static float trans_per_mux (int num_inputs, float trans_sram_bit);
  15 void
  16 count_routing_transistors (int num_switch, float R_minW_nmos,
  17                            float R_minW_pmos)
  18 {
  19   int *num_inputs_to_cblock;
  20   int iswitch, i, j, iseg, max_inputs_to_cblock;
  21   float input_cblock_trans;
  22   const float trans_sram_bit = 6.;
  23   float trans_cblock_to_lblock_buf;
  24   input_cblock_trans =
  25     get_cblock_trans (num_inputs_to_cblock, max_inputs_to_cblock,
  26                       trans_cblock_to_lblock_buf, trans_sram_bit);
  27 }
  28
  29 static float
  30 get_cblock_trans (int *num_inputs_to_cblock, int max_inputs_to_cblock,
  31                   float trans_cblock_to_lblock_buf, float trans_sram_bit)
  32 {
  33   float *trans_per_cblock;
  34   float trans_count;
  35   int i, num_inputs;
  36
  37   trans_per_cblock =
  38     (float *) my_malloc ((max_inputs_to_cblock + 1) * sizeof (float));
  39   for (i = 1; i <= max_inputs_to_cblock; i++)
  40     trans_per_cblock[i] =
  41       trans_per_mux (i, trans_sram_bit) + trans_cblock_to_lblock_buf;
  42   for (i = 0; i < num_rr_nodes; i++)
  43     {
  44       num_inputs = num_inputs_to_cblock[i];
  45       trans_count += trans_per_cblock[num_inputs];
  46     }
  47   free (trans_per_cblock);
  48   return (trans_count);
  49 }
  50
  51 static float
  52 trans_per_mux (int num_inputs, float trans_sram_bit)
  53 {
  54   int nlevels, ilevel, current_inps;
  55   float ntrans = 0;
  56
  57   if (num_inputs <= 1)
  58     return (0);
  59   nlevels = ceil (log10 (num_inputs) / log10 (2.) - 0.00001);
  60   current_inps = num_inputs;
  61   for (ilevel = 1; ilevel <= nlevels; ilevel++)
  62     {
  63       ntrans += 2 * floor (current_inps / 2.);
  64       current_inps = ceil (current_inps / 2.);
  65     }
  66   ntrans += trans_sram_bit * nlevels;
  67   return (ntrans);
  68 }