SRC/read_place.c

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#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "util.h"
#include "vpr_types.h"
#include "globals.h"
#include "hash.h"
#include "read_place.h"


/* extern, should be a header */
char **ReadLineTokens(INOUT FILE * InFile,
                      INOUT int *LineNum);


void
read_place(IN const char *place_file,
           IN const char *arch_file,
           IN const char *net_file,
           IN int nx,
           IN int ny,
           IN int num_blocks,
           INOUT struct s_block block_list[])
{

    FILE *infile;
    char **tokens;
    int line;
    int i;
    int error;
    struct s_block *cur_blk;

    infile = my_fopen(place_file, "r");

    /* Check filenames in first line match */
    tokens = ReadLineTokens(infile, &line);
    error = 0;
    if(NULL == tokens)
        {
            error = 1;
        }
    for(i = 0; i < 6; ++i)
        {
            if(!error)
                {
                    if(NULL == tokens[i])
                        {
                            error = 1;
                        }
                }
        }
    if(!error)
        {
            if((0 != strcmp(tokens[0], "Netlist")) ||
               (0 != strcmp(tokens[1], "file:")) ||
               (0 != strcmp(tokens[3], "Architecture")) ||
               (0 != strcmp(tokens[4], "file:")))
                {
                    error = 1;
                };
        }
    if(error)
        {
            printf(ERRTAG
                   "'%s' - Bad filename specification line in placement file\n",
                   place_file);
            exit(1);
        }
    if(0 != strcmp(tokens[2], arch_file))
        {
            printf(ERRTAG
                   "'%s' - Architecture file that generated placement (%s) does "
                   "not match current architecture file (%s)\n", place_file,
                   tokens[2], arch_file);
            exit(1);
        }
    if(0 != strcmp(tokens[5], net_file))
        {
            printf(ERRTAG
                   "'%s' - Netlist file that generated placement (%s) does "
                   "not match current netlist file (%s)\n", place_file,
                   tokens[5], net_file);
            exit(1);
        }

    /* Check array size in second line matches */
    tokens = ReadLineTokens(infile, &line);
    error = 0;
    if(NULL == tokens)
        {
            error = 1;
        }
    for(i = 0; i < 7; ++i)
        {
            if(!error)
                {
                    if(NULL == tokens[i])
                        {
                            error = 1;
                        }
                }
        }
    if(!error)
        {
            if((0 != strcmp(tokens[0], "Array")) ||
               (0 != strcmp(tokens[1], "size:")) ||
               (0 != strcmp(tokens[3], "x")) ||
               (0 != strcmp(tokens[5], "logic")) ||
               (0 != strcmp(tokens[6], "blocks")))
                {
                    error = 1;
                };
        }
    if(error)
        {
            printf(ERRTAG
                   "'%s' - Bad fpga size specification line in placement file\n",
                   place_file);
            exit(1);
        }
    if((my_atoi(tokens[2]) != nx) || (my_atoi(tokens[4]) != ny))
        {
            printf(ERRTAG
                   "'%s' - Current FPGA size (%d x %d) is different from "
                   "size when placement generated (%d x %d)\n", place_file,
                   nx, ny, my_atoi(tokens[2]), my_atoi(tokens[4]));
            exit(1);
        }

    tokens = ReadLineTokens(infile, &line);
    while(tokens)
        {
            /* Linear search to match pad to netlist */
            cur_blk = NULL;
            for(i = 0; i < num_blocks; ++i)
                {
                    if(0 == strcmp(block_list[i].name, tokens[0]))
                        {
                            cur_blk = (block_list + i);
                            break;
                        }
                }

            /* Error if invalid block */
            if(NULL == cur_blk)
                {
                    printf(ERRTAG "'%s':%d - Block in placement file does "
                           "not exist in netlist\n", place_file, line);
                    exit(1);
                }

            /* Set pad coords */
            cur_blk->x = my_atoi(tokens[1]);
            cur_blk->y = my_atoi(tokens[2]);
            cur_blk->z = my_atoi(tokens[3]);

            /* Get next line */
            assert(*tokens);
            free(*tokens);
            free(tokens);
            tokens = ReadLineTokens(infile, &line);
        }

    fclose(infile);
}

void
read_user_pad_loc(char *pad_loc_file)
{

/* Reads in the locations of the IO pads from a file. */

    struct s_hash **hash_table, *h_ptr;
    int iblk, i, j, xtmp, ytmp, bnum, k;
    FILE *fp;
    char buf[BUFSIZE], bname[BUFSIZE], *ptr;

    printf("\nReading locations of IO pads from %s.\n", pad_loc_file);
    linenum = 0;
    fp = my_fopen(pad_loc_file, "r");

    hash_table = alloc_hash_table();
    for(iblk = 0; iblk < num_blocks; iblk++)
        {
            if(block[iblk].type == IO_TYPE)
                {
                    h_ptr =
                        insert_in_hash_table(hash_table, block[iblk].name,
                                             iblk);
                    block[iblk].x = OPEN;       /* Mark as not seen yet. */
                }
        }

    for(i = 0; i <= nx + 1; i++)
        {
            for(j = 0; j <= ny + 1; j++)
                {
                    if(grid[i][j].type == IO_TYPE)
                        {
                            for(k = 0; k < IO_TYPE->capacity; k++)
                                grid[i][j].blocks[k] = OPEN;    /* Flag for err. check */
                        }
                }
        }

    ptr = my_fgets(buf, BUFSIZE, fp);

    while(ptr != NULL)
        {
            ptr = my_strtok(buf, TOKENS, fp, buf);
            if(ptr == NULL)
                {
                    ptr = my_fgets(buf, BUFSIZE, fp);
                    continue;   /* Skip blank or comment lines. */
                }

            strcpy(bname, ptr);

            ptr = my_strtok(NULL, TOKENS, fp, buf);
            if(ptr == NULL)
                {
                    printf("Error:  line %d is incomplete.\n", linenum);
                    exit(1);
                }
            sscanf(ptr, "%d", &xtmp);

            ptr = my_strtok(NULL, TOKENS, fp, buf);
            if(ptr == NULL)
                {
                    printf("Error:  line %d is incomplete.\n", linenum);
                    exit(1);
                }
            sscanf(ptr, "%d", &ytmp);

            ptr = my_strtok(NULL, TOKENS, fp, buf);
            if(ptr == NULL)
                {
                    printf("Error:  line %d is incomplete.\n", linenum);
                    exit(1);
                }
            sscanf(ptr, "%d", &k);

            ptr = my_strtok(NULL, TOKENS, fp, buf);
            if(ptr != NULL)
                {
                    printf("Error:  extra characters at end of line %d.\n",
                           linenum);
                    exit(1);
                }

            h_ptr = get_hash_entry(hash_table, bname);
            if(h_ptr == NULL)
                {
                    printf("Error:  block %s on line %d: no such IO pad.\n",
                           bname, linenum);
                    exit(1);
                }
            bnum = h_ptr->index;
            i = xtmp;
            j = ytmp;

            if(block[bnum].x != OPEN)
                {
                    printf
                        ("Error:  line %d.  Block %s listed twice in pad file.\n",
                         linenum, bname);
                    exit(1);
                }

            if(i < 0 || i > nx + 1 || j < 0 || j > ny + 1)
                {
                    printf("Error:  block #%d (%s) location\n", bnum, bname);
                    printf("(%d,%d) is out of range.\n", i, j);
                    exit(1);
                }

            block[bnum].x = i;  /* Will be reloaded by initial_placement anyway. */
            block[bnum].y = j;  /* I need to set .x only as a done flag.         */

            if(grid[i][j].type != IO_TYPE)
                {
                    printf("Error:  attempt to place IO block %s in \n",
                           bname);
                    printf("an illegal location (%d, %d).\n", i, j);
                    exit(1);
                }

            if(k >= IO_TYPE->capacity || k < 0)
                {
                    printf
                        ("Error:  Block %s subblock number (%d) on line %d is out of "
                         "range.\n", bname, k, linenum);
                    exit(1);
                }
            grid[i][j].blocks[k] = bnum;
            grid[i][j].usage++;

            ptr = my_fgets(buf, BUFSIZE, fp);
        }

    for(iblk = 0; iblk < num_blocks; iblk++)
        {
            if(block[iblk].type == IO_TYPE && block[iblk].x == OPEN)
                {
                    printf
                        ("Error:  IO block %s location was not specified in "
                         "the pad file.\n", block[iblk].name);
                    exit(1);
                }
        }

    fclose(fp);
    free_hash_table(hash_table);
    printf("Successfully read %s.\n\n", pad_loc_file);
}


void
print_place(char *place_file,
            char *net_file,
            char *arch_file)
{

/* Prints out the placement of the circuit.  The architecture and    *
 * netlist files used to generate this placement are recorded in the *
 * file to avoid loading a placement with the wrong support files    *
 * later.                                                            */

    FILE *fp;
    int i;

    fp = my_fopen(place_file, "w");

    fprintf(fp, "Netlist file: %s   Architecture file: %s\n", net_file,
            arch_file);
    fprintf(fp, "Array size: %d x %d logic blocks\n\n", nx, ny);
    fprintf(fp, "#block name\tx\ty\tsubblk\tblock number\n");
    fprintf(fp, "#----------\t--\t--\t------\t------------\n");

    for(i = 0; i < num_blocks; i++)
        {
            fprintf(fp, "%s\t", block[i].name);
            if(strlen(block[i].name) < 8)
                fprintf(fp, "\t");

            fprintf(fp, "%d\t%d\t%d", block[i].x, block[i].y, block[i].z);
            fprintf(fp, "\t#%d\n", i);
        }

    fclose(fp);
}

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