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 struct isl_constraint *isl_basic_set_first_constraint(
137 struct isl_basic_set *bset)
143 return isl_basic_set_constraint(bset, &bset->eq[0]);
145 if (bset->n_ineq > 0)
146 return isl_basic_set_constraint(bset, &bset->ineq[0]);
148 isl_basic_set_free(bset);
152 struct isl_constraint *isl_constraint_next(struct isl_constraint *c)
154 c = isl_constraint_cow(c);
155 if (c->line >= c->bmap->eq) {
157 if (c->line < c->bmap->eq + c->bmap->n_eq)
159 c->line = c->bmap->ineq;
162 if (c->line < c->bmap->ineq + c->bmap->n_ineq)
164 isl_constraint_free(c);
168 int isl_constraint_is_equal(struct isl_constraint *constraint1,
169 struct isl_constraint *constraint2)
171 if (!constraint1 || !constraint2)
173 return constraint1->bmap == constraint2->bmap &&
174 constraint1->line == constraint2->line;
177 struct isl_basic_map *isl_basic_map_add_constraint(
178 struct isl_basic_map *bmap, struct isl_constraint *constraint)
180 if (!bmap || !constraint)
183 isl_assert(constraint->ctx,
184 isl_dim_equal(bmap->dim, constraint->bmap->dim), goto error);
186 bmap = isl_basic_map_intersect(bmap,
187 isl_basic_map_copy(constraint->bmap));
188 isl_constraint_free(constraint);
191 isl_basic_map_free(bmap);
192 isl_constraint_free(constraint);
196 struct isl_basic_set *isl_basic_set_add_constraint(
197 struct isl_basic_set *bset, struct isl_constraint *constraint)
199 return (struct isl_basic_set *)
200 isl_basic_map_add_constraint((struct isl_basic_map *)bset,
204 struct isl_constraint *isl_constraint_add_div(struct isl_constraint *constraint,
205 struct isl_div *div, int *pos)
207 if (!constraint || !div)
210 isl_assert(constraint->ctx,
211 isl_dim_equal(div->bmap->dim, constraint->bmap->dim), goto error);
212 isl_assert(constraint->ctx,
213 constraint->bmap->n_eq + constraint->bmap->n_ineq == 1, goto error);
215 constraint->bmap = isl_basic_map_cow(constraint->bmap);
216 constraint->bmap = isl_basic_map_extend_dim(constraint->bmap,
217 isl_dim_copy(constraint->bmap->dim), 1, 0, 0);
218 if (!constraint->bmap)
220 constraint->line = &constraint->bmap->eq[0];
221 *pos = isl_basic_map_alloc_div(constraint->bmap);
224 isl_seq_cpy(constraint->bmap->div[*pos], div->line[0],
225 1 + 1 + isl_basic_map_total_dim(constraint->bmap));
229 isl_constraint_free(constraint);
234 int isl_constraint_dim(struct isl_constraint *constraint,
235 enum isl_dim_type type)
239 return n(constraint, type);
242 void isl_constraint_get_constant(struct isl_constraint *constraint, isl_int *v)
246 isl_int_set(*v, constraint->line[0][0]);
249 void isl_constraint_get_coefficient(struct isl_constraint *constraint,
250 enum isl_dim_type type, int pos, isl_int *v)
255 isl_assert(constraint->ctx, pos < n(constraint, type), return);
256 isl_int_set(*v, constraint->line[0][offset(constraint, type) + pos]);
259 struct isl_div *isl_constraint_div(struct isl_constraint *constraint, int pos)
264 isl_assert(constraint->ctx, pos < n(constraint, isl_dim_div),
266 return isl_basic_map_div(isl_basic_map_copy(constraint->bmap), pos);
269 void isl_constraint_set_constant(struct isl_constraint *constraint, isl_int v)
273 isl_int_set(constraint->line[0][0], v);
276 void isl_constraint_set_coefficient(struct isl_constraint *constraint,
277 enum isl_dim_type type, int pos, isl_int v)
282 isl_assert(constraint->ctx, pos < n(constraint, type), return);
283 isl_int_set(constraint->line[0][offset(constraint, type) + pos], v);
286 void isl_constraint_clear(struct isl_constraint *constraint)
292 total = isl_basic_map_total_dim(constraint->bmap);
293 isl_seq_clr(constraint->line[0], 1 + total);
296 struct isl_constraint *isl_constraint_negate(struct isl_constraint *constraint)
303 isl_assert(constraint->ctx, !isl_constraint_is_equality(constraint),
305 isl_assert(constraint->ctx, constraint->bmap->ref == 1, goto error);
306 total = isl_basic_map_total_dim(constraint->bmap);
307 isl_seq_neg(constraint->line[0], constraint->line[0], 1 + total);
308 isl_int_sub_ui(constraint->line[0][0], constraint->line[0][0], 1);
309 ISL_F_CLR(constraint->bmap, ISL_BASIC_MAP_NORMALIZED);
312 isl_constraint_free(constraint);
316 int isl_constraint_is_equality(struct isl_constraint *constraint)
320 return constraint->line >= constraint->bmap->eq;
324 struct isl_basic_set *isl_basic_set_from_constraint(
325 struct isl_constraint *constraint)
328 struct isl_basic_set *constraint_bset, *bset;
337 isl_assert(constraint->ctx,n(constraint, isl_dim_in) == 0, goto error);
339 constraint_bset = (struct isl_basic_set *)constraint->bmap;
340 bset = isl_basic_set_universe_like(constraint_bset);
341 bset = isl_basic_set_align_divs(bset, constraint_bset);
342 nparam = isl_basic_set_n_param(bset);
343 dim = isl_basic_set_n_dim(bset);
344 bset = isl_basic_set_cow(bset);
345 bset = isl_basic_set_extend(bset, nparam, dim, 0, 1, 1);
346 if (isl_constraint_is_equality(constraint)) {
347 k = isl_basic_set_alloc_equality(bset);
353 k = isl_basic_set_alloc_inequality(bset);
358 total = isl_basic_set_total_dim(bset);
359 isl_seq_cpy(c, constraint->line[0], 1 + total);
360 isl_constraint_free(constraint);
363 isl_constraint_free(constraint);
364 isl_basic_set_free(bset);
368 int isl_basic_set_has_defining_equality(
369 struct isl_basic_set *bset, enum isl_dim_type type, int pos,
370 struct isl_constraint **c)
378 offset = basic_set_offset(bset, type);
379 total = isl_basic_set_total_dim(bset);
380 isl_assert(bset->ctx, pos < isl_basic_set_dim(bset, type), return -1);
381 for (i = 0; i < bset->n_eq; ++i)
382 if (!isl_int_is_zero(bset->eq[i][offset + pos]) &&
383 isl_seq_first_non_zero(bset->eq[i]+offset+pos+1,
384 1+total-offset-pos-1) == -1) {
385 *c= isl_basic_set_constraint(isl_basic_set_copy(bset),
392 int isl_basic_set_has_defining_inequalities(
393 struct isl_basic_set *bset, enum isl_dim_type type, int pos,
394 struct isl_constraint **lower,
395 struct isl_constraint **upper)
401 isl_int **lower_line, **upper_line;
405 offset = basic_set_offset(bset, type);
406 total = isl_basic_set_total_dim(bset);
407 isl_assert(bset->ctx, pos < isl_basic_set_dim(bset, type), return -1);
409 for (i = 0; i < bset->n_ineq; ++i) {
410 if (isl_int_is_zero(bset->ineq[i][offset + pos]))
412 if (isl_int_is_one(bset->ineq[i][offset + pos]))
414 if (isl_int_is_negone(bset->ineq[i][offset + pos]))
416 if (isl_seq_first_non_zero(bset->ineq[i]+offset+pos+1,
417 1+total-offset-pos-1) != -1)
419 for (j = i + 1; j < bset->n_ineq; ++j) {
420 if (!isl_seq_is_neg(bset->ineq[i]+1, bset->ineq[j]+1,
423 isl_int_add(m, bset->ineq[i][0], bset->ineq[j][0]);
424 if (isl_int_abs_ge(m, bset->ineq[i][offset+pos]))
427 if (isl_int_is_pos(bset->ineq[i][offset+pos])) {
428 lower_line = &bset->ineq[i];
429 upper_line = &bset->ineq[j];
431 lower_line = &bset->ineq[j];
432 upper_line = &bset->ineq[i];
434 *lower = isl_basic_set_constraint(
435 isl_basic_set_copy(bset), lower_line);
436 *upper = isl_basic_set_constraint(
437 isl_basic_set_copy(bset), upper_line);