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