594 lines
20 KiB
C
594 lines
20 KiB
C
#include <stdio.h>
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#include "util.h"
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/* Xifan TANG */
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#include "physical_types.h"
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/* END */
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#include "vpr_types.h"
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#include "globals.h"
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#include "buffer_insertion.h"
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/* Xifan TANG */
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#include "mrfpga_util.h"
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#include "mrfpga_globals.h"
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#include "net_delay_types.h"
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#include "net_delay_local_void.h"
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/* END */
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/* memristor */
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typedef struct s_buffer_plan {t_linked_int* inode_head; t_linked_int* sink_head; float* sink_delay; float C_downstream; float Tdel;} t_buffer_plan;
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typedef struct s_buffer_plan_node { t_buffer_plan value; struct s_buffer_plan_node* next;} t_buffer_plan_node;
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typedef struct s_buffer_plan_list { t_buffer_plan_node* front; } t_buffer_plan_list;
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/* memristor */
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static t_buffer_plan_list get_empty_buffer_plan_list( );
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static t_buffer_plan_list join_left_plan_list_into_whole( t_buffer_plan_list left, t_buffer_plan_list* whole, int num_whole, t_buffer_plan_list current, int num_pins );
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static void free_buffer_list( t_buffer_plan_list list );
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static t_buffer_plan_list insert_buffer( t_buffer_plan_list list, int inode, float C, float R, float Tdel, int num_pins );
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static t_buffer_plan insert_wire_to_buffer_plan( t_buffer_plan plan, float C, float R);
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static void insert_wire_to_buffer_list( t_buffer_plan_list list, float C,float R);
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static void insert_switch_to_buffer_list( t_buffer_plan_list list, struct s_switch_inf switch_inf_local);
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static t_buffer_plan insert_switch_to_buffer_plan( t_buffer_plan plan, struct s_switch_inf switch_inf_local);
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static t_buffer_plan_list insert_buffer_plan_to_list( t_buffer_plan plan, t_buffer_plan_list list );
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static void save_best_buffer_list( t_linked_int* best_list );
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static void free_best_buffer_list( );
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static int get_int_list_length( t_linked_int* list );
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static void save_best_timing( float* sink_delay, t_linked_int* index, float* net_delay );
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static int alloc_isink_to_inode( int inet, int** isink_to_inode_ptr );
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static t_buffer_plan_list try_buffer_rc_tree (t_rc_node* rc_node, int num_pins, int* isink_to_inode);
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static t_buffer_plan get_init_buffer_plan( int inode, int num_pins, int* isink_to_inode );
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static t_buffer_plan_list get_init_buffer_plan_list( int inode, int num_pins, int* isink_to_inode );
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static t_buffer_plan combine_buffer_plan( t_buffer_plan slow_branch, t_buffer_plan* plan_whole, int num_whole, int num_pins );
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static void copy_delay( float* base, float* source, t_linked_int* index );
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static void add_delay_to_array( float* sink_delay, t_linked_int* index, float delay_addition );
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static float* copy_from_float_array( float* source, int num );
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static t_buffer_plan add_delay_to_buffer_plan( t_buffer_plan plan, float Tdel );
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void try_buffer_for_net( int inet, t_rc_node** rc_node_free_list, t_linked_rc_edge** rc_edge_free_list, t_linked_rc_ptr* rr_node_to_rc_node, float* net_delay );
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/* memristor */
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void try_buffer_for_routing ( float** net_delay ) {
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t_rc_node *rc_node_free_list;
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t_linked_rc_edge *rc_edge_free_list;
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int inet;
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t_linked_rc_ptr *rr_node_to_rc_node; /* [0..num_rr_nodes-1] */
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rr_node_to_rc_node = (t_linked_rc_ptr *) my_calloc (num_rr_nodes,
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sizeof (t_linked_rc_ptr));
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rc_node_free_list = NULL;
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rc_edge_free_list = NULL;
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free_best_buffer_list( );
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for (inet=0;inet<num_nets;inet++) {
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try_buffer_for_net( inet, &rc_node_free_list, &rc_edge_free_list, rr_node_to_rc_node, net_delay[inet] );
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}
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/* printf( " critical delay after buffer insertion: %g\n", crit_delay ); */
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free_rc_node_free_list (rc_node_free_list);
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free_rc_edge_free_list (rc_edge_free_list);
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free (rr_node_to_rc_node);
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}
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void try_buffer_for_net( int inet, t_rc_node** rc_node_free_list, t_linked_rc_edge** rc_edge_free_list, t_linked_rc_ptr* rr_node_to_rc_node, float* net_delay ) {
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t_rc_node *rc_root;
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t_buffer_plan_list plan_list;
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t_buffer_plan_node* traverse;
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t_buffer_plan best;
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float crit_delay = 0;
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int* isink_to_inode;
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int num_pins;
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/* Xifan TANG: VPR7 use clb_net */
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if (clb_net[inet].is_global) {
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return;
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}
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else {
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num_pins = alloc_isink_to_inode( inet, &isink_to_inode );
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rc_root = alloc_and_load_rc_tree (inet, rc_node_free_list,
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rc_edge_free_list, rr_node_to_rc_node);
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plan_list = try_buffer_rc_tree(rc_root, num_pins, isink_to_inode);
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best.Tdel = HUGE_VAL;
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traverse = plan_list.front;
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while ( traverse != NULL )
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{
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if ( traverse->value.Tdel < best.Tdel || ( traverse->value.Tdel == best.Tdel && get_int_list_length( traverse->value.inode_head ) < get_int_list_length( best.inode_head ) ) )
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{
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best = traverse->value;;
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}
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traverse = traverse->next;
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}
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crit_delay = max( crit_delay, best.Tdel );
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save_best_buffer_list( best.inode_head );
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save_best_timing( best.sink_delay, best.sink_head, net_delay );
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free_buffer_list( plan_list );
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free_rc_tree (rc_root, rc_node_free_list, rc_edge_free_list);
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reset_rr_node_to_rc_node (rr_node_to_rc_node, inet );
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free( isink_to_inode );
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}
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}
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static void save_best_timing( float* sink_delay, t_linked_int* index, float* net_delay )
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{
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t_linked_int* traverse;
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traverse = index;
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while( traverse != NULL )
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{
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net_delay[traverse->data] = sink_delay[traverse->data];
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traverse = traverse->next;
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}
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}
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static int alloc_isink_to_inode( int inet, int** isink_to_inode_ptr )
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{
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int i;
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int num_pins = clb_net[inet].num_sinks + 1;
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*isink_to_inode_ptr = (int*)my_malloc( sizeof(int) * num_pins );
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for( i = 1; i < num_pins; i++ )
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{
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(*isink_to_inode_ptr)[i] = net_rr_terminals[inet][i];
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}
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return num_pins;
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}
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static int get_int_list_length( t_linked_int* list )
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{
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t_linked_int* traverse = list;
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int counter = 0;
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while ( traverse != NULL )
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{
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counter++;
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traverse = traverse->next;
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}
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return counter;
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}
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static void free_best_buffer_list( )
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{
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t_linked_int* traverse = main_best_buffer_list;
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t_linked_int* current;
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while ( traverse != NULL )
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{
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current = traverse;
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traverse = current->next;
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free( current );
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}
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main_best_buffer_list = NULL;
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}
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static void save_best_buffer_list( t_linked_int* best_list )
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{
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t_linked_int* current;
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t_linked_int* traverse = best_list;
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while ( traverse != NULL )
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{
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current = ( t_linked_int* ) my_malloc( sizeof( t_linked_int ) );
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current->data = traverse->data;
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current->next = main_best_buffer_list;
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main_best_buffer_list = current;
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traverse = traverse->next;
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}
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}
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void load_best_buffer_list( )
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{
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t_linked_int* traverse = main_best_buffer_list;
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clear_buffer( );
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while ( traverse != NULL )
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{
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rr_node[ traverse->data ].buffered = 1;
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traverse = traverse->next;
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}
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}
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int print_stat_memristor_buffer( char* fname, float buffer_size )
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{
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char fnamex[100];
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char fnamey[100];
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FILE* fpx;
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FILE* fpy;
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int** freqx;
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int** freqy;
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int counter;
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int i, j;
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t_linked_int* traverse;
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int max_number;
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sprintf( fnamex, "x_%s", fname );
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sprintf( fnamey, "y_%s", fname );
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fpx = my_fopen( fnamex, "w" ,0);
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fpy = my_fopen( fnamey, "w" ,0);
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freqx = (int**) alloc_matrix( 1, nx, 0, ny, sizeof(int) );
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freqy = (int**) alloc_matrix( 0, nx, 1, ny, sizeof(int) );
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counter = 0;
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for( i = 1; i <= nx; i++ )
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{
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for( j = 0; j <= ny; j++ )
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{
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freqx[i][j]=0;
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}
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}
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for( i = 0; i <= nx; i++ )
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{
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for( j = 1; j <= ny; j++ )
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{
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freqy[i][j]=0;
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}
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}
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traverse = main_best_buffer_list;
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while ( traverse != NULL )
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{
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counter++;
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if ( rr_node[traverse->data].type == CHANX )
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{
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freqx[rr_node[traverse->data].xlow][( rr_node[traverse->data].ylow + rr_node[traverse->data].yhigh ) / 2]++;
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}
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else if ( rr_node[traverse->data].type == CHANY )
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{
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freqy[(rr_node[traverse->data].xlow+rr_node[traverse->data].xhigh)/2][rr_node[traverse->data].ylow]++;
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}
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traverse = traverse->next;
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}
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max_number = 0;
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for( i = 1; i <= nx; i++ )
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{
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for( j = 0; j <= ny; j++ )
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{
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max_number = max( max_number, freqx[i][j] );
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fprintf( fpx, "%d ", freqx[i][j] );
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}
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fprintf( fpx, "\n" );
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}
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for( i = 0; i <= nx; i++ )
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{
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for( j = 1; j <= ny; j++ )
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{
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max_number = max( max_number, freqy[i][j] );
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fprintf( fpy, "%d ", freqy[i][j] );
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}
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fprintf( fpy, "\n" );
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}
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free_matrix( freqx, 1, nx, 0, sizeof(int) );
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free_matrix( freqy, 0, nx, 1, sizeof(int) );
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fclose( fpx );
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fclose( fpy );
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printf( "%d buffers ( size: %g ) inserted, total active trans: %g\n", counter, buffer_size, counter*buffer_size );
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printf( "maximum # of buffers in one channel: %d\n", max_number );
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return max_number;
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}
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void clear_buffer( )
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{
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int i;
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for( i = 0; i < num_rr_nodes; i++ )
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{
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rr_node[ i ].buffered = 0;
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}
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}
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static t_buffer_plan_list try_buffer_rc_tree (t_rc_node *rc_node, int num_pins, int* isink_to_inode) {
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t_linked_rc_edge *linked_rc_edge;
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t_rc_node *child_node;
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short iswitch;
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int inode;
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int num_whole;
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int i;
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t_rr_node rrnode;
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t_buffer_plan_list result;
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t_buffer_plan_list* plan_list_from_branch;
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inode = rc_node->inode;
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rrnode = rr_node[ inode ];
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if ( rrnode.type == SINK )
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{
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result = get_init_buffer_plan_list( inode, num_pins, isink_to_inode );
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}
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else
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{
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result = get_empty_buffer_plan_list( );
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num_whole = 0;
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linked_rc_edge = rc_node->u.child_list;
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while (linked_rc_edge != NULL) { /* For all children */
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num_whole++;
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linked_rc_edge = linked_rc_edge->next;
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}
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plan_list_from_branch = ( t_buffer_plan_list* )my_malloc( num_whole*sizeof(t_buffer_plan_list) );
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i = 0;
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linked_rc_edge = rc_node->u.child_list;
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while (linked_rc_edge != NULL) { /* For all children */
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iswitch = linked_rc_edge->iswitch;
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child_node = linked_rc_edge->child;
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plan_list_from_branch[i] = try_buffer_rc_tree( child_node, num_pins, isink_to_inode );
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insert_switch_to_buffer_list( plan_list_from_branch[i], switch_inf[ iswitch ] );
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linked_rc_edge = linked_rc_edge->next;
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i++;
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}
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if ( num_whole > 1 )
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{
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for( i = 0; i < num_whole; i++ )
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{
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result = join_left_plan_list_into_whole( plan_list_from_branch[ i ], plan_list_from_branch, num_whole, result, num_pins );
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}
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for( i = 0; i < num_whole; i++ )
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{
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free_buffer_list( plan_list_from_branch[ i ] );
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}
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}
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else
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{
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result = plan_list_from_branch[ 0 ];
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}
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free( plan_list_from_branch );
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insert_wire_to_buffer_list( result, rrnode.C, 0.5 * rrnode.R );
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if (rr_node[ inode ].type == CHANX || rr_node[ inode ].type == CHANY)
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{
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result = insert_buffer( result, inode, wire_buffer_inf.C, wire_buffer_inf.R, wire_buffer_inf.Tdel, num_pins );
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}
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}
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return result;
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}
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static void add_delay_to_buffer_list( t_buffer_plan_list list, float Tdel , boolean skip_first )
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{
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t_buffer_plan_node* traverse = list.front;
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if ( skip_first && traverse != NULL )
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{
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traverse = traverse->next;
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}
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while ( traverse != NULL )
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{
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traverse->value = add_delay_to_buffer_plan( traverse->value, Tdel );
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traverse = traverse->next;
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}
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}
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static t_buffer_plan add_delay_to_buffer_plan( t_buffer_plan plan, float Tdel )
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{
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add_delay_to_array( plan.sink_delay, plan.sink_head, Tdel );
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plan.Tdel += Tdel;
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return plan;
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}
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static t_buffer_plan_list get_empty_buffer_plan_list( )
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{
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t_buffer_plan_list list;
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list.front = NULL;
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return list;
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}
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static t_buffer_plan get_init_buffer_plan( int inode, int num_pins, int* isink_to_inode )
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{
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t_buffer_plan plan;
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int i;
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plan.inode_head = NULL;
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plan.sink_head = (t_linked_int*) my_malloc( sizeof( t_linked_int ) );
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plan.sink_head->next = 0;
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plan.sink_delay = (float*) my_malloc( sizeof(float) * num_pins );
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for( i = 1; i < num_pins; i++ )
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{
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if( isink_to_inode[ i ] == inode )
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{
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plan.sink_head->data = i;
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}
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plan.sink_delay[i] = 0;
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}
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plan.C_downstream = 0.;
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plan.Tdel = 0.;
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return plan;
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}
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static t_buffer_plan_list get_init_buffer_plan_list( int inode, int num_pins, int* isink_to_inode )
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{
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t_buffer_plan_list list;
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list.front = ( t_buffer_plan_node* ) my_malloc( sizeof( t_buffer_plan_node ) );
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list.front->value = get_init_buffer_plan( inode, num_pins, isink_to_inode );
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list.front->next = NULL;
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return list;
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}
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static t_buffer_plan_list join_left_plan_list_into_whole( t_buffer_plan_list left, t_buffer_plan_list* whole, int num_whole, t_buffer_plan_list current, int num_pins )
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{
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int i;
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t_buffer_plan_node* left_traverse;
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t_buffer_plan_node* whole_traverse;
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t_buffer_plan* best_plans = (t_buffer_plan*) my_malloc(num_whole*sizeof(t_buffer_plan));
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left_traverse = left.front;
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while( left_traverse != NULL )
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{
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for( i=0; i< num_whole; i++ )
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{
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best_plans[i].C_downstream = HUGE_VAL;
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if ( left.front == whole[ i ].front )
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{
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continue;
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}
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whole_traverse = whole[i].front;
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while ( whole_traverse != NULL )
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{
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if ( whole_traverse->value.Tdel <= left_traverse->value.Tdel
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&& whole_traverse->value.C_downstream < best_plans[i].C_downstream )
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{
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best_plans[i] = whole_traverse->value;
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}
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whole_traverse = whole_traverse->next;
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}
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if ( best_plans[i].C_downstream == HUGE_VAL )
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{
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break;
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}
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}
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if ( i == num_whole )
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{
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current = insert_buffer_plan_to_list( combine_buffer_plan( left_traverse->value, best_plans, num_whole, num_pins ), current );
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}
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left_traverse = left_traverse->next;
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}
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free( best_plans );
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return current;
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}
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static t_buffer_plan combine_buffer_plan( t_buffer_plan slow_branch, t_buffer_plan* plan_whole, int num_whole, int num_pins )
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{
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int i;
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t_buffer_plan new_plan = slow_branch;
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new_plan.inode_head = NULL;
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new_plan.sink_head = NULL;
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new_plan.sink_delay = (float*) my_malloc( sizeof(float) * num_pins );
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new_plan.inode_head = copy_from_list( new_plan.inode_head, slow_branch.inode_head );
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new_plan.sink_head = copy_from_list( new_plan.sink_head, slow_branch.sink_head );
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copy_delay( new_plan.sink_delay, slow_branch.sink_delay, slow_branch.sink_head );
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for( i = 0; i < num_whole; i++ )
|
|
{
|
|
if ( plan_whole[ i ].C_downstream == HUGE_VAL )
|
|
{
|
|
continue;
|
|
}
|
|
new_plan.C_downstream += plan_whole[i].C_downstream;
|
|
new_plan.inode_head = copy_from_list( new_plan.inode_head, plan_whole[i].inode_head );
|
|
new_plan.sink_head = copy_from_list( new_plan.sink_head, plan_whole[i].sink_head );
|
|
copy_delay( new_plan.sink_delay, plan_whole[i].sink_delay, plan_whole[i].sink_head );
|
|
}
|
|
return new_plan;
|
|
}
|
|
|
|
static void copy_delay( float* base, float* source, t_linked_int* index )
|
|
{
|
|
t_linked_int* traverse = index;
|
|
while( traverse != NULL )
|
|
{
|
|
base[traverse->data] = source[traverse->data];
|
|
traverse = traverse->next;
|
|
}
|
|
}
|
|
|
|
static void free_buffer_list( t_buffer_plan_list list )
|
|
{
|
|
t_buffer_plan_node* traverse = list.front;
|
|
t_buffer_plan_node* temp;
|
|
while( traverse != NULL )
|
|
{
|
|
free_int_list( &( traverse->value.inode_head ) );
|
|
free_int_list( &( traverse->value.sink_head ) );
|
|
free( traverse->value.sink_delay );
|
|
temp = traverse->next;
|
|
free( traverse );
|
|
traverse = temp;
|
|
}
|
|
}
|
|
|
|
static t_buffer_plan_list insert_buffer( t_buffer_plan_list list, int inode, float C, float R, float Tdel, int num_pins )
|
|
{
|
|
t_buffer_plan best;
|
|
//int i;
|
|
float Tdel_temp;
|
|
float delay_addition;
|
|
float Tdel_best = HUGE_VAL;
|
|
t_buffer_plan_node* traverse = list.front;
|
|
while ( traverse != NULL )
|
|
{
|
|
Tdel_temp = traverse->value.Tdel + traverse->value.C_downstream * R;
|
|
if ( Tdel_temp < Tdel_best )
|
|
{
|
|
Tdel_best = Tdel_temp;
|
|
best = traverse->value;
|
|
}
|
|
traverse = traverse->next;
|
|
}
|
|
best.inode_head = copy_from_list( NULL, best.inode_head );
|
|
best.inode_head = insert_in_int_list2( best.inode_head, inode );
|
|
best.sink_head = copy_from_list( NULL, best.sink_head );
|
|
best.sink_delay = copy_from_float_array( best.sink_delay, num_pins );
|
|
best.C_downstream = C;
|
|
delay_addition = Tdel_best + Tdel - best.Tdel;
|
|
add_delay_to_array( best.sink_delay, best.sink_head, delay_addition );
|
|
best.Tdel += delay_addition;
|
|
return insert_buffer_plan_to_list( best, list );
|
|
}
|
|
|
|
static float* copy_from_float_array( float* source, int num )
|
|
{
|
|
int i;
|
|
float* result = (float*)my_malloc( sizeof(float) * num );
|
|
for( i = 0; i < num; i++ )
|
|
{
|
|
result[i] = source[i];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static t_buffer_plan insert_wire_to_buffer_plan( t_buffer_plan plan, float C, float R )
|
|
{
|
|
float delay_addition;
|
|
plan.C_downstream += C;
|
|
delay_addition = R * plan.C_downstream;
|
|
add_delay_to_array( plan.sink_delay, plan.sink_head, delay_addition );
|
|
plan.Tdel += delay_addition;
|
|
return plan;
|
|
}
|
|
|
|
static void add_delay_to_array( float* sink_delay, t_linked_int* index, float delay_addition )
|
|
{
|
|
t_linked_int* traverse = index;
|
|
while( traverse != NULL )
|
|
{
|
|
sink_delay[traverse->data] += delay_addition;
|
|
traverse = traverse->next;
|
|
}
|
|
}
|
|
|
|
static t_buffer_plan insert_switch_to_buffer_plan( t_buffer_plan plan, struct s_switch_inf switch_inf_local)
|
|
{
|
|
float delay_addition;
|
|
delay_addition = switch_inf_local.R * plan.C_downstream + switch_inf_local.Tdel;
|
|
add_delay_to_array( plan.sink_delay, plan.sink_head, delay_addition );
|
|
plan.Tdel += delay_addition;
|
|
if ( switch_inf_local.buffered )
|
|
{
|
|
plan.C_downstream = switch_inf_local.Cin;
|
|
}
|
|
else
|
|
{
|
|
plan.C_downstream += switch_inf_local.Cout + switch_inf_local.Cin;
|
|
}
|
|
return plan;
|
|
}
|
|
|
|
static void insert_switch_to_buffer_list( t_buffer_plan_list list, struct s_switch_inf switch_inf_local)
|
|
{
|
|
t_buffer_plan_node* traverse = list.front;
|
|
while ( traverse != NULL )
|
|
{
|
|
traverse->value = insert_switch_to_buffer_plan( traverse->value, switch_inf_local);
|
|
traverse = traverse->next;
|
|
}
|
|
}
|
|
|
|
static void insert_wire_to_buffer_list( t_buffer_plan_list list, float C,float R )
|
|
{
|
|
t_buffer_plan_node* traverse = list.front;
|
|
while ( traverse != NULL )
|
|
{
|
|
traverse->value = insert_wire_to_buffer_plan( traverse->value, C, R );
|
|
traverse = traverse->next;
|
|
}
|
|
}
|
|
|
|
static t_buffer_plan_list insert_buffer_plan_to_list( t_buffer_plan plan, t_buffer_plan_list list ) {
|
|
/* original name : new is a resevered word in C++!!! */
|
|
t_buffer_plan_node* new_buffer_plan_node = ( t_buffer_plan_node* )my_malloc( sizeof( t_buffer_plan_node ) );
|
|
new_buffer_plan_node->value = plan;
|
|
new_buffer_plan_node->next = list.front;
|
|
list.front = new_buffer_plan_node;
|
|
return list;
|
|
}
|
|
|
|
void count_routing_memristor_buffer( int num_per_channel, float buffer_size )
|
|
{
|
|
float total_area = num_per_channel*((1+nx)*ny+(1+ny)*nx)*buffer_size;
|
|
printf("\nRouting area due to inserted buffers: Total: %g Per clb: %g\n", total_area, total_area / nx / ny );
|
|
printf("tile area: %#g\n", total_area / nx / ny + grid_logic_tile_area );
|
|
}
|
|
|
|
/* memristor end */
|
|
|