1 #include <isl_constraint.h>
3 #include "isl_map_private.h"
5 static unsigned n(struct isl_constraint *c, enum isl_dim_type type)
7 return isl_basic_map_dim(c->bmap, type);
10 static unsigned offset(struct isl_constraint *c, enum isl_dim_type type)
12 struct isl_dim *dim = c->bmap->dim;
14 case isl_dim_param: return 1;
15 case isl_dim_in: return 1 + dim->nparam;
16 case isl_dim_out: return 1 + dim->nparam + dim->n_in;
17 case isl_dim_div: return 1 + dim->nparam + dim->n_in + dim->n_out;
21 static unsigned basic_set_offset(struct isl_basic_set *bset,
22 enum isl_dim_type type)
24 struct isl_dim *dim = bset->dim;
26 case isl_dim_param: return 1;
27 case isl_dim_in: return 1 + dim->nparam;
28 case isl_dim_out: return 1 + dim->nparam + dim->n_in;
29 case isl_dim_div: return 1 + dim->nparam + dim->n_in + dim->n_out;
33 struct isl_constraint *isl_basic_map_constraint(struct isl_basic_map *bmap,
36 struct isl_constraint *constraint;
41 constraint = isl_alloc_type(bmap->ctx, struct isl_constraint);
45 constraint->ctx = bmap->ctx;
46 isl_ctx_ref(constraint->ctx);
48 constraint->bmap = bmap;
49 constraint->line = line;
53 isl_basic_map_free(bmap);
57 struct isl_constraint *isl_basic_set_constraint(struct isl_basic_set *bset,
60 return isl_basic_map_constraint((struct isl_basic_map *)bset, line);
63 struct isl_constraint *isl_equality_alloc(struct isl_dim *dim)
65 struct isl_basic_map *bmap;
70 bmap = isl_basic_map_alloc_dim(dim, 0, 1, 0);
74 isl_basic_map_alloc_equality(bmap);
75 isl_seq_clr(bmap->eq[0], 1 + isl_basic_map_total_dim(bmap));
76 return isl_basic_map_constraint(bmap, &bmap->eq[0]);
79 struct isl_constraint *isl_inequality_alloc(struct isl_dim *dim)
81 struct isl_basic_map *bmap;
86 bmap = isl_basic_map_alloc_dim(dim, 0, 0, 1);
90 isl_basic_map_alloc_inequality(bmap);
91 isl_seq_clr(bmap->ineq[0], 1 + isl_basic_map_total_dim(bmap));
92 return isl_basic_map_constraint(bmap, &bmap->ineq[0]);
95 struct isl_constraint *isl_constraint_dup(struct isl_constraint *c)
100 return isl_basic_map_constraint(isl_basic_map_copy(c->bmap), c->line);
103 struct isl_constraint *isl_constraint_cow(struct isl_constraint *c)
111 return isl_constraint_dup(c);
114 struct isl_constraint *isl_constraint_copy(struct isl_constraint *constraint)
123 void isl_constraint_free(struct isl_constraint *c)
131 isl_basic_map_free(c->bmap);
132 isl_ctx_deref(c->ctx);
136 __isl_give isl_constraint *isl_basic_map_first_constraint(
137 __isl_take isl_basic_map *bmap)
143 return isl_basic_map_constraint(bmap, &bmap->eq[0]);
145 if (bmap->n_ineq > 0)
146 return isl_basic_map_constraint(bmap, &bmap->ineq[0]);
148 isl_basic_map_free(bmap);
152 __isl_give isl_constraint *isl_basic_set_first_constraint(
153 __isl_take isl_basic_set *bset)
155 return isl_basic_map_first_constraint((struct isl_basic_map *)bset);
158 struct isl_constraint *isl_constraint_next(struct isl_constraint *c)
160 c = isl_constraint_cow(c);
161 if (c->line >= c->bmap->eq) {
163 if (c->line < c->bmap->eq + c->bmap->n_eq)
165 c->line = c->bmap->ineq;
168 if (c->line < c->bmap->ineq + c->bmap->n_ineq)
170 isl_constraint_free(c);
174 int isl_constraint_is_equal(struct isl_constraint *constraint1,
175 struct isl_constraint *constraint2)
177 if (!constraint1 || !constraint2)
179 return constraint1->bmap == constraint2->bmap &&
180 constraint1->line == constraint2->line;
183 struct isl_basic_map *isl_basic_map_add_constraint(
184 struct isl_basic_map *bmap, struct isl_constraint *constraint)
186 if (!bmap || !constraint)
189 isl_assert(constraint->ctx,
190 isl_dim_equal(bmap->dim, constraint->bmap->dim), goto error);
192 bmap = isl_basic_map_intersect(bmap,
193 isl_basic_map_from_constraint(constraint));
196 isl_basic_map_free(bmap);
197 isl_constraint_free(constraint);
201 struct isl_basic_set *isl_basic_set_add_constraint(
202 struct isl_basic_set *bset, struct isl_constraint *constraint)
204 return (struct isl_basic_set *)
205 isl_basic_map_add_constraint((struct isl_basic_map *)bset,
209 struct isl_constraint *isl_constraint_add_div(struct isl_constraint *constraint,
210 struct isl_div *div, int *pos)
212 if (!constraint || !div)
215 isl_assert(constraint->ctx,
216 isl_dim_equal(div->bmap->dim, constraint->bmap->dim), goto error);
217 isl_assert(constraint->ctx,
218 constraint->bmap->n_eq + constraint->bmap->n_ineq == 1, goto error);
220 constraint->bmap = isl_basic_map_cow(constraint->bmap);
221 constraint->bmap = isl_basic_map_extend_dim(constraint->bmap,
222 isl_dim_copy(constraint->bmap->dim), 1, 0, 0);
223 if (!constraint->bmap)
225 constraint->line = &constraint->bmap->eq[0];
226 *pos = isl_basic_map_alloc_div(constraint->bmap);
229 isl_seq_cpy(constraint->bmap->div[*pos], div->line[0],
230 1 + 1 + isl_basic_map_total_dim(constraint->bmap));
234 isl_constraint_free(constraint);
239 int isl_constraint_dim(struct isl_constraint *constraint,
240 enum isl_dim_type type)
244 return n(constraint, type);
247 void isl_constraint_get_constant(struct isl_constraint *constraint, isl_int *v)
251 isl_int_set(*v, constraint->line[0][0]);
254 void isl_constraint_get_coefficient(struct isl_constraint *constraint,
255 enum isl_dim_type type, int pos, isl_int *v)
260 isl_assert(constraint->ctx, pos < n(constraint, type), return);
261 isl_int_set(*v, constraint->line[0][offset(constraint, type) + pos]);
264 struct isl_div *isl_constraint_div(struct isl_constraint *constraint, int pos)
269 isl_assert(constraint->ctx, pos < n(constraint, isl_dim_div),
271 return isl_basic_map_div(isl_basic_map_copy(constraint->bmap), pos);
274 void isl_constraint_set_constant(struct isl_constraint *constraint, isl_int v)
278 isl_int_set(constraint->line[0][0], v);
281 void isl_constraint_set_coefficient(struct isl_constraint *constraint,
282 enum isl_dim_type type, int pos, isl_int v)
287 isl_assert(constraint->ctx, pos < n(constraint, type), return);
288 isl_int_set(constraint->line[0][offset(constraint, type) + pos], v);
291 void isl_constraint_clear(struct isl_constraint *constraint)
297 total = isl_basic_map_total_dim(constraint->bmap);
298 isl_seq_clr(constraint->line[0], 1 + total);
301 struct isl_constraint *isl_constraint_negate(struct isl_constraint *constraint)
308 isl_assert(constraint->ctx, !isl_constraint_is_equality(constraint),
310 isl_assert(constraint->ctx, constraint->bmap->ref == 1, goto error);
311 total = isl_basic_map_total_dim(constraint->bmap);
312 isl_seq_neg(constraint->line[0], constraint->line[0], 1 + total);
313 isl_int_sub_ui(constraint->line[0][0], constraint->line[0][0], 1);
314 ISL_F_CLR(constraint->bmap, ISL_BASIC_MAP_NORMALIZED);
317 isl_constraint_free(constraint);
321 int isl_constraint_is_equality(struct isl_constraint *constraint)
325 return constraint->line >= constraint->bmap->eq;
328 __isl_give isl_basic_map *isl_basic_map_from_constraint(
329 __isl_take isl_constraint *constraint)
332 struct isl_basic_map *bmap;
339 if (constraint->bmap->n_eq + constraint->bmap->n_ineq == 1) {
340 bmap = isl_basic_map_copy(constraint->bmap);
341 isl_constraint_free(constraint);
345 bmap = isl_basic_map_universe_like(constraint->bmap);
346 bmap = isl_basic_map_align_divs(bmap, constraint->bmap);
347 bmap = isl_basic_map_cow(bmap);
348 bmap = isl_basic_map_extend_constraints(bmap, 1, 1);
349 if (isl_constraint_is_equality(constraint)) {
350 k = isl_basic_map_alloc_equality(bmap);
356 k = isl_basic_map_alloc_inequality(bmap);
361 total = isl_basic_map_total_dim(bmap);
362 isl_seq_cpy(c, constraint->line[0], 1 + total);
363 isl_constraint_free(constraint);
366 isl_constraint_free(constraint);
367 isl_basic_map_free(bmap);
371 struct isl_basic_set *isl_basic_set_from_constraint(
372 struct isl_constraint *constraint)
377 isl_assert(constraint->ctx,n(constraint, isl_dim_in) == 0, goto error);
378 return (isl_basic_set *)isl_basic_map_from_constraint(constraint);
380 isl_constraint_free(constraint);
384 int isl_basic_set_has_defining_equality(
385 struct isl_basic_set *bset, enum isl_dim_type type, int pos,
386 struct isl_constraint **c)
394 offset = basic_set_offset(bset, type);
395 total = isl_basic_set_total_dim(bset);
396 isl_assert(bset->ctx, pos < isl_basic_set_dim(bset, type), return -1);
397 for (i = 0; i < bset->n_eq; ++i)
398 if (!isl_int_is_zero(bset->eq[i][offset + pos]) &&
399 isl_seq_first_non_zero(bset->eq[i]+offset+pos+1,
400 1+total-offset-pos-1) == -1) {
401 *c= isl_basic_set_constraint(isl_basic_set_copy(bset),
408 int isl_basic_set_has_defining_inequalities(
409 struct isl_basic_set *bset, enum isl_dim_type type, int pos,
410 struct isl_constraint **lower,
411 struct isl_constraint **upper)
417 isl_int **lower_line, **upper_line;
421 offset = basic_set_offset(bset, type);
422 total = isl_basic_set_total_dim(bset);
423 isl_assert(bset->ctx, pos < isl_basic_set_dim(bset, type), return -1);
425 for (i = 0; i < bset->n_ineq; ++i) {
426 if (isl_int_is_zero(bset->ineq[i][offset + pos]))
428 if (isl_int_is_one(bset->ineq[i][offset + pos]))
430 if (isl_int_is_negone(bset->ineq[i][offset + pos]))
432 if (isl_seq_first_non_zero(bset->ineq[i]+offset+pos+1,
433 1+total-offset-pos-1) != -1)
435 for (j = i + 1; j < bset->n_ineq; ++j) {
436 if (!isl_seq_is_neg(bset->ineq[i]+1, bset->ineq[j]+1,
439 isl_int_add(m, bset->ineq[i][0], bset->ineq[j][0]);
440 if (isl_int_abs_ge(m, bset->ineq[i][offset+pos]))
443 if (isl_int_is_pos(bset->ineq[i][offset+pos])) {
444 lower_line = &bset->ineq[i];
445 upper_line = &bset->ineq[j];
447 lower_line = &bset->ineq[j];
448 upper_line = &bset->ineq[i];
450 *lower = isl_basic_set_constraint(
451 isl_basic_set_copy(bset), lower_line);
452 *upper = isl_basic_set_constraint(
453 isl_basic_set_copy(bset), upper_line);