SRC/timing_place.c File Reference

#include <stdio.h>
#include <math.h>
#include "util.h"
#include "vpr_types.h"
#include "globals.h"
#include "path_delay.h"
#include "path_delay2.h"
#include "net_delay.h"
#include "timing_place_lookup.h"
#include "timing_place.h"

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Functions
static float **	alloc_crit (struct s_linked_vptr **chunk_list_head_ptr)
static void	free_crit (struct s_linked_vptr **chunk_list_head_ptr)
void	print_sink_delays (char *fname)
void	load_criticalities (struct s_placer_opts placer_opts, float **net_slack, float d_max, float crit_exponent)
void	alloc_lookups_and_criticalities (t_chan_width_dist chan_width_dist, struct s_router_opts router_opts, struct s_det_routing_arch det_routing_arch, t_segment_inf *segment_inf, t_timing_inf timing_inf, t_subblock_data subblock_data, float ***net_delay, float ***net_slack)
void	free_lookups_and_criticalities (float ***net_delay, float ***net_slack)
Variables
float **	timing_place_crit
static struct s_linked_vptr *	timing_place_crit_chunk_list_head
static struct s_linked_vptr *	net_delay_chunk_list_head

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Function Documentation

static float ** alloc_crit

(

struct s_linked_vptr **

chunk_list_head_ptr

)

[static]

Definition at line 27 of file timing_place.c.

{

    /* Allocates space for the timing_place_crit data structure *
     * [0..num_nets-1][1..num_pins-1].  I chunk the data to save space on large    *
     * problems.                                                                   */

    float **local_crit;         /* [0..num_nets-1][1..num_pins-1] */
    float *tmp_ptr;
    int inet;
    int chunk_bytes_avail;
    char *chunk_next_avail_mem;

    *chunk_list_head_ptr = NULL;
    chunk_bytes_avail = 0;
    chunk_next_avail_mem = NULL;

    local_crit = (float **)my_malloc(num_nets * sizeof(float *));

    for(inet = 0; inet < num_nets; inet++)
        {
            tmp_ptr = (float *)my_chunk_malloc((net[inet].num_sinks) *
                                               sizeof(float),
                                               chunk_list_head_ptr,
                                               &chunk_bytes_avail,
                                               &chunk_next_avail_mem);
            local_crit[inet] = tmp_ptr - 1;     /* [1..num_sinks] */
        }

    return (local_crit);
}

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void alloc_lookups_and_criticalities	(	t_chan_width_dist	chan_width_dist,
		struct s_router_opts	router_opts,
		struct s_det_routing_arch	det_routing_arch,
		t_segment_inf *	segment_inf,
		t_timing_inf	timing_inf,
		t_subblock_data	subblock_data,
		float ***	net_delay,
		float ***	net_slack
	)

Definition at line 138 of file timing_place.c.

{

    (*net_slack) = alloc_and_load_timing_graph(timing_inf, subblock_data);

    (*net_delay) = alloc_net_delay(&net_delay_chunk_list_head);

    compute_delay_lookup_tables(router_opts, det_routing_arch, segment_inf,
                                timing_inf, chan_width_dist, subblock_data);

    timing_place_crit = alloc_crit(&timing_place_crit_chunk_list_head);

}

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static void free_crit

(

struct s_linked_vptr **

chunk_list_head_ptr

)

[static]

Definition at line 61 of file timing_place.c.

{

    free_chunk_memory(*chunk_list_head_ptr);
    *chunk_list_head_ptr = NULL;
}

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void free_lookups_and_criticalities	(	float ***	net_delay,
		float ***	net_slack
	)

Definition at line 161 of file timing_place.c.

{

    free(timing_place_crit);
    free_crit(&timing_place_crit_chunk_list_head);

    free_timing_graph(*net_slack);
    free_net_delay(*net_delay, &net_delay_chunk_list_head);

}

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void load_criticalities	(	struct s_placer_opts	placer_opts,
		float **	net_slack,
		float	d_max,
		float	crit_exponent
	)

Definition at line 100 of file timing_place.c.

{

    /*set criticality values, returns the maximum criticality found */
    /*assumes that net_slack contains correct values, ie. assumes  *
     *that load_net_slack has been called*/

    int inet, ipin;
    float pin_crit;



    for(inet = 0; inet < num_nets; inet++)
        {

            if(inet == OPEN)
                continue;
            if(net[inet].is_global)
                continue;

            for(ipin = 1; ipin <= net[inet].num_sinks; ipin++)
                {
                    /*clip the criticality to never go negative (could happen */
                    /*for a constant generator since it's slack is huge) */
                    pin_crit = max(1 - net_slack[inet][ipin] / d_max, 0.);
                    timing_place_crit[inet][ipin] =
                        pow(pin_crit, crit_exponent);

                }
        }
}

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void print_sink_delays

(

char *

fname

)

Definition at line 70 of file timing_place.c.

{


    int num_at_level, num_edges, inode, ilevel, i;
    FILE *fp;

    fp = my_fopen(fname, "w");


    for(ilevel = num_tnode_levels - 1; ilevel >= 0; ilevel--)
        {
            num_at_level = tnodes_at_level[ilevel].nelem;

            for(i = 0; i < num_at_level; i++)
                {
                    inode = tnodes_at_level[ilevel].list[i];
                    num_edges = tnode[inode].num_edges;

                    if(num_edges == 0)
                        {       /* sink */
                            fprintf(fp, "%g\n", tnode[inode].T_arr);
                        }
                }
        }
    fclose(fp);
}

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Variable Documentation

struct s_linked_vptr* net_delay_chunk_list_head [static]

Definition at line 16 of file timing_place.c.

float** timing_place_crit

Definition at line 13 of file timing_place.c.

struct s_linked_vptr* timing_place_crit_chunk_list_head [static]

Definition at line 15 of file timing_place.c.