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- #include "espresso.h"
-
-
- /* cost -- compute the cost of a cover */
- void cover_cost(F, cost)
- IN pcover F;
- INOUT pcost cost;
- {
- register pcube p, last;
- pcube *T;
- int var;
-
- /* use the routine used by cofactor to decide splitting variables */
- massive_count(T = cube1list(F));
- free_cubelist(T);
-
- cost->cubes = F->count;
- cost->total = cost->in = cost->out = cost->mv = cost->primes = 0;
-
- /* Count transistors (zeros) for each binary variable (inputs) */
- for(var = 0; var < cube.num_binary_vars; var++)
- cost->in += cdata.var_zeros[var];
-
- /* Count transistors for each mv variable based on sparse/dense */
- for(var = cube.num_binary_vars; var < cube.num_vars - 1; var++)
- if (cube.sparse[var])
- cost->mv += F->count * cube.part_size[var] - cdata.var_zeros[var];
- else
- cost->mv += cdata.var_zeros[var];
-
- /* Count the transistors (ones) for the output variable */
- if (cube.num_binary_vars != cube.num_vars) {
- var = cube.num_vars - 1;
- cost->out = F->count * cube.part_size[var] - cdata.var_zeros[var];
- }
-
- /* Count the number of nonprime cubes */
- foreach_set(F, last, p)
- cost->primes += TESTP(p, PRIME) != 0;
-
- /* Count the total number of literals */
- cost->total = cost->in + cost->out + cost->mv;
- }
-
-
- /* fmt_cost -- return a string which reports the "cost" of a cover */
- char *fmt_cost(cost)
- IN pcost cost;
- {
- static char s[200];
-
- if (cube.num_binary_vars == cube.num_vars - 1)
- (void) sprintf(s, "c=%d(%d) in=%d out=%d tot=%d",
- cost->cubes, cost->cubes - cost->primes, cost->in,
- cost->out, cost->total);
- else
- (void) sprintf(s, "c=%d(%d) in=%d mv=%d out=%d",
- cost->cubes, cost->cubes - cost->primes, cost->in,
- cost->mv, cost->out);
- return s;
- }
-
-
- char *print_cost(F)
- IN pcover F;
- {
- cost_t cost;
- cover_cost(F, &cost);
- return fmt_cost(&cost);
- }
-
-
- /* copy_cost -- copy a cost function from s to d */
- void copy_cost(s, d)
- pcost s, d;
- {
- d->cubes = s->cubes;
- d->in = s->in;
- d->out = s->out;
- d->mv = s->mv;
- d->total = s->total;
- d->primes = s->primes;
- }
-
-
- /* size_stamp -- print single line giving the size of a cover */
- void size_stamp(T, name)
- IN pcover T;
- IN char *name;
- {
- printf("# %s\tCost is %s\n", name, print_cost(T));
- (void) fflush(stdout);
- }
-
-
- /* print_trace -- print a line reporting size and time after a function */
- void print_trace(T, name, time)
- pcover T;
- char *name;
- long time;
- {
- printf("# %s\tTime was %s, cost is %s\n",
- name, print_time(time), print_cost(T));
- (void) fflush(stdout);
- }
-
-
- /* totals -- add time spent in the function into the totals */
- void totals(time, i, T, cost)
- long time;
- int i;
- pcover T;
- pcost cost;
- {
- time = ptime() - time;
- total_time[i] += time;
- total_calls[i]++;
- cover_cost(T, cost);
- if (trace) {
- printf("# %s\tTime was %s, cost is %s\n",
- total_name[i], print_time(time), fmt_cost(cost));
- (void) fflush(stdout);
- }
- }
-
-
- /* fatal -- report fatal error message and take a dive */
- void fatal(s)
- char *s;
- {
- fprintf(stderr, "espresso: %s\n", s);
- exit(1);
- }
-