/* Compute the size of a bounding box around the origin and "set",
* where "set" is assumed to contain only non-negative elements.
* In particular, compute the maximal value of "set" in each direction
* and add one.
*/
__isl_give isl_multi_pw_aff *ppcg_size_from_extent(__isl_take isl_set *set)
{
int i, n;
isl_multi_pw_aff *mpa;
n = isl_set_dim(set, isl_dim_set);
mpa = isl_multi_pw_aff_zero(isl_set_get_space(set));
for (i = 0; i < n; ++i) {
isl_space *space;
isl_aff *one;
isl_pw_aff *bound;
if (!isl_set_dim_has_upper_bound(set, isl_dim_set, i)) {
const char *name;
name = isl_set_get_tuple_name(set);
if (!name)
name = "";
fprintf(stderr, "unable to determine extent of '%s' "
"in dimension %d\n", name, i);
set = isl_set_free(set);
}
bound = isl_set_dim_max(isl_set_copy(set), i);
space = isl_pw_aff_get_domain_space(bound);
one = isl_aff_zero_on_domain(isl_local_space_from_space(space));
one = isl_aff_add_constant_si(one, 1);
bound = isl_pw_aff_add(bound, isl_pw_aff_from_aff(one));
mpa = isl_multi_pw_aff_set_pw_aff(mpa, i, bound);
}
isl_set_free(set);
return mpa;
}
/* Return the result of applying the comparison operator "type"
* to "pa1" and "pa2".
*
* In particular, construct an isl_pw_aff that is equal to 1
* on the subset of the shared domain of "pa1" and "pa2" where
* the comparison holds and 0 on the other part of the shared domain.
*
* If "pa1" or "pa2" involve any NaN, then return NaN.
*/
__isl_give isl_pw_aff *pet_comparison(enum pet_op_type type,
__isl_take isl_pw_aff *pa1, __isl_take isl_pw_aff *pa2)
{
isl_set *dom;
isl_set *cond;
isl_pw_aff *res;
if (!pa1 || !pa2)
goto error;
if (isl_pw_aff_involves_nan(pa1) || isl_pw_aff_involves_nan(pa2)) {
isl_space *space = isl_pw_aff_get_domain_space(pa1);
isl_local_space *ls = isl_local_space_from_space(space);
isl_pw_aff_free(pa1);
isl_pw_aff_free(pa2);
return isl_pw_aff_nan_on_domain(ls);
}
dom = isl_pw_aff_domain(isl_pw_aff_copy(pa1));
dom = isl_set_intersect(dom, isl_pw_aff_domain(isl_pw_aff_copy(pa2)));
switch (type) {
case pet_op_lt:
cond = isl_pw_aff_lt_set(pa1, pa2);
break;
case pet_op_le:
cond = isl_pw_aff_le_set(pa1, pa2);
break;
case pet_op_gt:
cond = isl_pw_aff_gt_set(pa1, pa2);
break;
case pet_op_ge:
cond = isl_pw_aff_ge_set(pa1, pa2);
break;
case pet_op_eq:
cond = isl_pw_aff_eq_set(pa1, pa2);
break;
case pet_op_ne:
cond = isl_pw_aff_ne_set(pa1, pa2);
break;
default:
isl_die(isl_pw_aff_get_ctx(pa1), isl_error_internal,
"not a comparison operator", cond = NULL);
isl_pw_aff_free(pa1);
isl_pw_aff_free(pa2);
}
cond = isl_set_coalesce(cond);
res = indicator_function(cond, dom);
return res;
error:
isl_pw_aff_free(pa1);
isl_pw_aff_free(pa2);
return NULL;
}
/* Return "!!pa", i.e., a function that is equal to 1 when "pa"
* is non-zero and equal to 0 when "pa" is equal to zero,
* on the domain of "pa".
*
* If "pa" involves any NaN, then return NaN.
*/
__isl_give isl_pw_aff *pet_to_bool(__isl_take isl_pw_aff *pa)
{
isl_set *cond, *dom;
if (!pa)
return NULL;
if (isl_pw_aff_involves_nan(pa)) {
isl_space *space = isl_pw_aff_get_domain_space(pa);
isl_local_space *ls = isl_local_space_from_space(space);
isl_pw_aff_free(pa);
return isl_pw_aff_nan_on_domain(ls);
}
dom = isl_pw_aff_domain(isl_pw_aff_copy(pa));
cond = isl_pw_aff_non_zero_set(pa);
pa = indicator_function(cond, dom);
return pa;
}
