map.c

主要进行大规模的电路综合

/*
 * Revision Control Information
 *
 * $Source: /projects/mvsis/Repository/mvsis-1.3/src/sis/espresso/map.c,v $
 * $Author: wjiang $
 * $Revision: 1.1.1.1 $
 * $Date: 2003/02/24 22:24:08 $
 *
 */
#include "espresso.h"

static pcube Gcube;
static pset Gminterm;

pset minterms(T)
pcover T;
{
    int size, var;
    register pcube last;

    size = 1;
    for(var = 0; var < cube.num_vars; var++)
	size *= cube.part_size[var];
    Gminterm = set_new(size);

    foreach_set(T, last, Gcube)
	explode(cube.num_vars-1, 0);

    return Gminterm;
}


void explode(var, z)
int var, z;
{
    int i, last = cube.last_part[var];
    for(i=cube.first_part[var], z *= cube.part_size[var]; i<=last; i++, z++)
	if (is_in_set(Gcube, i))
	    if (var == 0)
		set_insert(Gminterm, z);
	    else
		explode(var-1, z);
}


static int mapindex[16][16] = {
     0,  1,  3,  2,   16, 17, 19, 18,      80, 81, 83, 82,   64, 65, 67, 66,
     4,  5,  7,  6,   20, 21, 23, 22,      84, 85, 87, 86,   68, 69, 71, 70,
    12, 13, 15, 14,   28, 29, 31, 30,      92, 93, 95, 94,   76, 77, 79, 78,
     8,  9, 11, 10,   24, 25, 27, 26,      88, 89, 91, 90,   72, 73, 75, 74,

    32, 33, 35, 34,   48, 49, 51, 50,     112,113,115,114,   96, 97, 99, 98,
    36, 37, 39, 38,   52, 53, 55, 54,     116,117,119,118,  100,101,103,102,
    44, 45, 47, 46,   60, 61, 63, 62,     124,125,127,126,  108,109,111,110,
    40, 41, 43, 42,   56, 57, 59, 58,     120,121,123,122,  104,105,107,106,


   160,161,163,162,  176,177,179,178,     240,241,243,242,  224,225,227,226,
   164,165,167,166,  180,181,183,182,     244,245,247,246,  228,229,231,230,
   172,173,175,174,  188,189,191,190,     252,253,255,254,  236,237,239,238,
   168,169,171,170,  184,185,187,186,     248,249,251,250,  232,233,235,234,

   128,129,131,130,  144,145,147,146,     208,209,211,210,  192,193,195,194,
   132,133,135,134,  148,149,151,150,     212,213,215,214,  196,197,199,198,
   140,141,143,142,  156,157,159,158,     220,221,223,222,  204,205,207,206,
   136,137,139,138,  152,153,155,154,     216,217,219,218,  200,201,203,202
};

#define POWER2(n) (1 << n)
void map(T)
pcover T;
{
    int j, k, l, other_input_offset, output_offset, outnum, ind;
    int largest_input_ind,  numout;
    char c;
    pset m;
    bool some_output;

    m = minterms(T);
    largest_input_ind = POWER2(cube.num_binary_vars);
    numout = cube.part_size[cube.num_vars-1];

    for(outnum = 0; outnum < numout; outnum++) {
	output_offset = outnum * largest_input_ind;
	(void) printf("\n\nOutput space # %d\n", outnum);
	for(l = 0; l <= MAX(cube.num_binary_vars - 8, 0); l++) {
	    other_input_offset = l * 256;
	    for(k = 0; k < 16; k++) {
		some_output = FALSE;
		for(j = 0; j < 16; j++) {
		    ind = mapindex[k][j] + other_input_offset;
		    if (ind < largest_input_ind) {
			c = is_in_set(m, ind+output_offset) ? '1' : '.';
			putchar(c);
			some_output = TRUE;
		    }
		    if ((j+1)%4 == 0)
			putchar(' ');
		    if ((j+1)%8 == 0)
			(void) printf("  ");
		}
		if (some_output)
		    putchar('\n');
		if ((k+1)%4 == 0) {
		    if (k != 15 && mapindex[k+1][0] >= largest_input_ind)
			break;
		    putchar('\n');
		}
		if ((k+1)%8 == 0)
		    putchar('\n');
	    }
	}
    }
    set_free(m);
}