Viewing file:  pr42250.c (1.97 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2" } */
extern double log10 (double __x);
extern double ceil (double __x);
extern double floor (double __x);
extern void free (void *__ptr);
extern void *my_malloc (unsigned int);
extern int num_rr_nodes;
static float get_cblock_trans (int *num_inputs_to_cblock,
int max_inputs_to_cblock,
float trans_cblock_to_lblock_buf,
float trans_sram_bit);
static float trans_per_mux (int num_inputs, float trans_sram_bit);
void
count_routing_transistors (int num_switch, float R_minW_nmos,
float R_minW_pmos)
{
int *num_inputs_to_cblock;
int iswitch, i, j, iseg, max_inputs_to_cblock;
float input_cblock_trans;
const float trans_sram_bit = 6.;
float trans_cblock_to_lblock_buf;
input_cblock_trans =
get_cblock_trans (num_inputs_to_cblock, max_inputs_to_cblock,
trans_cblock_to_lblock_buf, trans_sram_bit);
}
static float
get_cblock_trans (int *num_inputs_to_cblock, int max_inputs_to_cblock,
float trans_cblock_to_lblock_buf, float trans_sram_bit)
{
float *trans_per_cblock;
float trans_count;
int i, num_inputs;
trans_per_cblock =
(float *) my_malloc ((max_inputs_to_cblock + 1) * sizeof (float));
for (i = 1; i <= max_inputs_to_cblock; i++)
trans_per_cblock[i] =
trans_per_mux (i, trans_sram_bit) + trans_cblock_to_lblock_buf;
for (i = 0; i < num_rr_nodes; i++)
{
num_inputs = num_inputs_to_cblock[i];
trans_count += trans_per_cblock[num_inputs];
}
free (trans_per_cblock);
return (trans_count);
}
static float
trans_per_mux (int num_inputs, float trans_sram_bit)
{
int nlevels, ilevel, current_inps;
float ntrans = 0;
if (num_inputs <= 1)
return (0);
nlevels = ceil (log10 (num_inputs) / log10 (2.) - 0.00001);
current_inps = num_inputs;
for (ilevel = 1; ilevel <= nlevels; ilevel++)
{
ntrans += 2 * floor (current_inps / 2.);
current_inps = ceil (current_inps / 2.);
}
ntrans += trans_sram_bit * nlevels;
return (ntrans);
}
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