vpr/SRC/route/check_rr_graph.h File Reference
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Functions | |
| void | check_rr_graph (INP t_graph_type graph_type, INP int num_types, INP t_type_ptr types, INP int nx, INP int ny, INP struct s_grid_tile **grid, INP int nodes_per_chan, INP int Fs, INP int num_seg_types, INP int num_switches, INP t_segment_inf *segment_inf, INP int global_route_switch, INP int delayless_switch, INP int wire_to_ipin_switch, t_seg_details *seg_details, int *Fc_in, int *Fc_out, t_ivec ***rr_node_indices, int *****opin_to_track_map, int *****ipin_to_track_map, t_ivec ****track_to_ipin_lookup, t_ivec ***switch_block_conn, boolean *perturb_ipins) |
| void | check_node (int inode, enum e_route_type route_type) |
Function Documentation
| void check_node | ( | int | inode, |
| enum e_route_type | route_type | ||
| ) |
This routine checks that the rr_node is inside the grid and has a valid pin number, etc.
Definition at line 245 of file check_rr_graph.c.
{
int xlow, ylow, xhigh, yhigh, ptc_num, capacity;
t_rr_type rr_type;
t_type_ptr type;
int nodes_per_chan, tracks_per_node, num_edges, cost_index;
float C, R;
rr_type = rr_node[inode].type;
xlow = rr_node[inode].xlow;
xhigh = rr_node[inode].xhigh;
ylow = rr_node[inode].ylow;
yhigh = rr_node[inode].yhigh;
ptc_num = rr_node[inode].ptc_num;
capacity = rr_node[inode].capacity;
type = NULL;
if(xlow > xhigh || ylow > yhigh)
{
printf
("Error in check_node: rr endpoints are (%d,%d) and (%d,%d).\n",
xlow, ylow, xhigh, yhigh);
exit(1);
}
if(xlow < 0 || xhigh > nx + 1 || ylow < 0 || yhigh > ny + 1)
{
printf
("Error in check_node: rr endpoints, (%d,%d) and (%d,%d), \n"
"are out of range.\n", xlow, ylow, xhigh, yhigh);
exit(1);
}
if(ptc_num < 0)
{
printf("Error in check_node. Inode %d (type %d) had a ptc_num\n"
"of %d.\n", inode, rr_type, ptc_num);
exit(1);
}
/* Check that the segment is within the array and such. */
switch (rr_type)
{
case SOURCE:
case SINK:
case IPIN:
case OPIN:
/* This is used later as well */
type = grid[xlow][ylow].type;
if(type == NULL)
{
printf
("Error in check_node: Node %d (type %d) is at an illegal\n"
" clb location (%d, %d).\n", inode, rr_type, xlow,
ylow);
exit(1);
}
if(xlow != xhigh || ylow != (yhigh - type->height + 1))
{
printf
("Error in check_node: Node %d (type %d) has endpoints of\n"
"(%d,%d) and (%d,%d)\n", inode, rr_type, xlow, ylow,
xhigh, yhigh);
exit(1);
}
break;
case CHANX:
if(xlow < 1 || xhigh > nx || yhigh > ny || yhigh != ylow)
{
printf("Error in check_node: CHANX out of range.\n");
printf("Endpoints: (%d,%d) and (%d,%d)\n", xlow, ylow,
xhigh, yhigh);
exit(1);
}
if(route_type == GLOBAL && xlow != xhigh)
{
printf
("Error in check_node: node %d spans multiple channel segments\n"
"which is not allowed with global routing.\n",
inode);
exit(1);
}
break;
case CHANY:
if(xhigh > nx || ylow < 1 || yhigh > ny || xlow != xhigh)
{
printf("Error in check_node: CHANY out of range.\n");
printf("Endpoints: (%d,%d) and (%d,%d)\n", xlow, ylow,
xhigh, yhigh);
exit(1);
}
if(route_type == GLOBAL && ylow != yhigh)
{
printf
("Error in check_node: node %d spans multiple channel segments\n"
"which is not allowed with global routing.\n",
inode);
exit(1);
}
break;
default:
printf("Error in check_node: Unexpected segment type: %d\n",
rr_type);
exit(1);
}
/* Check that it's capacities and such make sense. */
switch (rr_type)
{
case SOURCE:
if(ptc_num >= type->num_class
|| type->class_inf[ptc_num].type != DRIVER)
{
printf
("Error in check_node. Inode %d (type %d) had a ptc_num\n"
"of %d.\n", inode, rr_type, ptc_num);
exit(1);
}
if(type->class_inf[ptc_num].num_pins != capacity)
{
printf
("Error in check_node. Inode %d (type %d) had a capacity\n"
"of %d.\n", inode, rr_type, capacity);
exit(1);
}
break;
case SINK:
if(ptc_num >= type->num_class
|| type->class_inf[ptc_num].type != RECEIVER)
{
printf
("Error in check_node. Inode %d (type %d) had a ptc_num\n"
"of %d.\n", inode, rr_type, ptc_num);
exit(1);
}
if(type->class_inf[ptc_num].num_pins != capacity)
{
printf
("Error in check_node. Inode %d (type %d) has a capacity\n"
"of %d.\n", inode, rr_type, capacity);
exit(1);
}
break;
case OPIN:
if(ptc_num >= type->num_pins
|| type->class_inf[type->pin_class[ptc_num]].type != DRIVER)
{
printf
("Error in check_node. Inode %d (type %d) had a ptc_num\n"
"of %d.\n", inode, rr_type, ptc_num);
exit(1);
}
if(capacity != 1)
{
printf
("Error in check_node: Inode %d (type %d) has a capacity\n"
"of %d.\n", inode, rr_type, capacity);
exit(1);
}
break;
case IPIN:
if(ptc_num >= type->num_pins
|| type->class_inf[type->pin_class[ptc_num]].type != RECEIVER)
{
printf
("Error in check_node. Inode %d (type %d) had a ptc_num\n"
"of %d.\n", inode, rr_type, ptc_num);
exit(1);
}
if(capacity != 1)
{
printf
("Error in check_node: Inode %d (type %d) has a capacity\n"
"of %d.\n", inode, rr_type, capacity);
exit(1);
}
break;
case CHANX:
if(route_type == DETAILED)
{
nodes_per_chan = chan_width_x[ylow];
tracks_per_node = 1;
}
else
{
nodes_per_chan = 1;
tracks_per_node = chan_width_x[ylow];
}
if(ptc_num >= nodes_per_chan)
{
printf
("Error in check_node: Inode %d (type %d) has a ptc_num\n"
"of %d.\n", inode, rr_type, ptc_num);
exit(1);
}
if(capacity != tracks_per_node)
{
printf
("Error in check_node: Inode %d (type %d) has a capacity\n"
"of %d.\n", inode, rr_type, capacity);
exit(1);
}
break;
case CHANY:
if(route_type == DETAILED)
{
nodes_per_chan = chan_width_y[xlow];
tracks_per_node = 1;
}
else
{
nodes_per_chan = 1;
tracks_per_node = chan_width_y[xlow];
}
if(ptc_num >= nodes_per_chan)
{
printf
("Error in check_node: Inode %d (type %d) has a ptc_num\n"
"of %d.\n", inode, rr_type, ptc_num);
exit(1);
}
if(capacity != tracks_per_node)
{
printf
("Error in check_node: Inode %d (type %d) has a capacity\n"
"of %d.\n", inode, rr_type, capacity);
exit(1);
}
break;
default:
printf("Error in check_node: Unexpected segment type: %d\n",
rr_type);
exit(1);
}
/* Check that the number of (out) edges is reasonable. */
num_edges = rr_node[inode].num_edges;
if(rr_type != SINK)
{
if(num_edges <= 0)
{
printf("Error: in check_node: node %d has no edges.\n",
inode);
exit(1);
}
}
else
{ /* SINK -- remove this check if feedthroughs allowed */
if(num_edges != 0)
{
printf("Error in check_node: node %d is a sink, but has "
"%d edges.\n", inode, num_edges);
exit(1);
}
}
/* Check that the capacitance, resistance and cost_index are reasonable. */
C = rr_node[inode].C;
R = rr_node[inode].R;
if(rr_type == CHANX || rr_type == CHANY)
{
if(C < 0. || R < 0.)
{
printf
("Error in check_node: node %d of type %d has R = %g "
"and C = %g.\n", inode, rr_type, R, C);
exit(1);
}
}
else
{
if(C != 0. || R != 0.)
{
printf
("Error in check_node: node %d of type %d has R = %g "
"and C = %g.\n", inode, rr_type, R, C);
exit(1);
}
}
cost_index = rr_node[inode].cost_index;
if(cost_index < 0 || cost_index >= num_rr_indexed_data)
{
printf("Error in check_node: node %d cost index (%d) is out of "
"range.\n", inode, cost_index);
exit(1);
}
}
Here is the caller graph for this function:
| void check_rr_graph | ( | INP t_graph_type | graph_type, |
| INP int | num_types, | ||
| INP t_type_ptr | types, | ||
| INP int | nx, | ||
| INP int | ny, | ||
| INP struct s_grid_tile ** | grid, | ||
| INP int | nodes_per_chan, | ||
| INP int | Fs, | ||
| INP int | num_seg_types, | ||
| INP int | num_switches, | ||
| INP t_segment_inf * | segment_inf, | ||
| INP int | global_route_switch, | ||
| INP int | delayless_switch, | ||
| INP int | wire_to_ipin_switch, | ||
| t_seg_details * | seg_details, | ||
| int * | Fc_in, | ||
| int * | Fc_out, | ||
| t_ivec *** | rr_node_indices, | ||
| int ***** | opin_to_track_map, | ||
| int ***** | ipin_to_track_map, | ||
| t_ivec **** | track_to_ipin_lookup, | ||
| t_ivec *** | switch_block_conn, | ||
| boolean * | perturb_ipins | ||
| ) |
Definition at line 25 of file check_rr_graph.c.
{
int *num_edges_from_current_to_node; /* [0..num_rr_nodes-1] */
int *total_edges_to_node; /* [0..num_rr_nodes-1] */
char *switch_types_from_current_to_node; /* [0..num_rr_nodes-1] */
int inode, iedge, to_node, num_edges;
short switch_type;
t_rr_type rr_type, to_rr_type;
enum e_route_type route_type;
boolean is_fringe_warning_sent;
route_type = DETAILED;
if(graph_type == GRAPH_GLOBAL)
{
route_type = GLOBAL;
}
total_edges_to_node = (int *)my_calloc(num_rr_nodes, sizeof(int));
num_edges_from_current_to_node = (int *)my_calloc(num_rr_nodes,
sizeof(int));
switch_types_from_current_to_node = (char *)my_calloc(num_rr_nodes,
sizeof(char));
for(inode = 0; inode < num_rr_nodes; inode++)
{
rr_type = rr_node[inode].type;
num_edges = rr_node[inode].num_edges;
check_node(inode, route_type);
/* Check all the connectivity (edges, etc.) information. */
for(iedge = 0; iedge < num_edges; iedge++)
{
to_node = rr_node[inode].edges[iedge];
if(to_node < 0 || to_node >= num_rr_nodes)
{
printf
("Error in check_rr_graph: node %d has an edge %d.\n"
"Edge is out of range.\n", inode, to_node);
exit(1);
}
num_edges_from_current_to_node[to_node]++;
total_edges_to_node[to_node]++;
switch_type = rr_node[inode].switches[iedge];
if(switch_type < 0 || switch_type >= num_switches)
{
printf
("Error in check_rr_graph: node %d has a switch type %d.\n"
"Switch type is out of range.\n", inode,
switch_type);
exit(1);
}
if(switch_inf[switch_type].buffered)
switch_types_from_current_to_node[to_node] |=
BUF_FLAG;
else
switch_types_from_current_to_node[to_node] |=
PTRANS_FLAG;
} /* End for all edges of node. */
for(iedge = 0; iedge < num_edges; iedge++)
{
to_node = rr_node[inode].edges[iedge];
if(num_edges_from_current_to_node[to_node] > 1)
{
to_rr_type = rr_node[to_node].type;
if((to_rr_type != CHANX && to_rr_type != CHANY) ||
(rr_type != CHANX && rr_type != CHANY))
{
printf
("Error in check_rr_graph: node %d connects to node %d "
"%d times.\n", inode, to_node,
num_edges_from_current_to_node
[to_node]);
exit(1);
}
/* Between two wire segments. Two connections are legal only if *
* one connection is a buffer and the other is a pass transistor. */
else if(num_edges_from_current_to_node[to_node] !=
2
||
switch_types_from_current_to_node[to_node]
!= BUF_AND_PTRANS_FLAG)
{
printf
("Error in check_rr_graph: node %d connects to node %d "
"%d times.\n", inode, to_node,
num_edges_from_current_to_node
[to_node]);
exit(1);
}
}
num_edges_from_current_to_node[to_node] = 0;
switch_types_from_current_to_node[to_node] = 0;
}
/* Slow test below. Leave commented out most of the time. */
#ifdef DEBUG
check_pass_transistors(inode);
#endif
} /* End for all rr_nodes */
/* I built a list of how many edges went to everything in the code above -- *
* now I check that everything is reachable. */
is_fringe_warning_sent = FALSE;
for(inode = 0; inode < num_rr_nodes; inode++)
{
rr_type = rr_node[inode].type;
if(rr_type != SOURCE)
{
if(total_edges_to_node[inode] < 1 &&
!rr_node_is_global_clb_ipin(inode))
{
boolean is_fringe;
boolean is_wire;
/* A global CLB input pin will not have any edges, and neither will *
* a SOURCE. Anything else is an error. */
is_fringe = ((rr_node[inode].xlow == 1) || (rr_node[inode].ylow == 1)
|| (rr_node[inode].xhigh == nx) || (rr_node[inode].yhigh == ny));
is_wire = (rr_node[inode].type == CHANX || rr_node[inode].type == CHANY);
if (!is_fringe && !is_wire)
{
printf ("Error in check_rr_graph: node %d has no fanin.\n", inode);
exit(1);
}
else if (!is_fringe_warning_sent)
{
printf ("WARNING: in check_rr_graph: fringe node %d has no fanin.\n"
"This is possible on the fringe for low Fc_out, N, and certain Lengths\n"
, inode);
is_fringe_warning_sent = TRUE;
}
}
}
else
{ /* SOURCE. No fanin for now; change if feedthroughs allowed. */
if(total_edges_to_node[inode] != 0)
{
printf
("Error in check_rr_graph: SOURCE node %d has a fanin\n"
"\tof %d, expected 0.\n", inode,
total_edges_to_node[inode]);
exit(1);
}
}
}
free(num_edges_from_current_to_node);
free(total_edges_to_node);
free(switch_types_from_current_to_node);
}
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