2 * Copyright 2011 INRIA Saclay
3 * Copyright 2011 Sven Verdoolaege
4 * Copyright 2012-2013 Ecole Normale Superieure
6 * Use of this software is governed by the MIT license
8 * Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
9 * Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
11 * and Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France
14 #include <isl_ctx_private.h>
16 #include <isl_map_private.h>
17 #include <isl_union_map_private.h>
18 #include <isl_aff_private.h>
19 #include <isl_space_private.h>
20 #include <isl_local_space_private.h>
21 #include <isl_mat_private.h>
22 #include <isl/constraint.h>
25 #include <isl_val_private.h>
26 #include <isl_config.h>
31 #include <isl_list_templ.c>
36 #include <isl_list_templ.c>
38 __isl_give isl_aff *isl_aff_alloc_vec(__isl_take isl_local_space *ls,
39 __isl_take isl_vec *v)
46 aff = isl_calloc_type(v->ctx, struct isl_aff);
56 isl_local_space_free(ls);
61 __isl_give isl_aff *isl_aff_alloc(__isl_take isl_local_space *ls)
70 ctx = isl_local_space_get_ctx(ls);
71 if (!isl_local_space_divs_known(ls))
72 isl_die(ctx, isl_error_invalid, "local space has unknown divs",
74 if (!isl_local_space_is_set(ls))
75 isl_die(ctx, isl_error_invalid,
76 "domain of affine expression should be a set",
79 total = isl_local_space_dim(ls, isl_dim_all);
80 v = isl_vec_alloc(ctx, 1 + 1 + total);
81 return isl_aff_alloc_vec(ls, v);
83 isl_local_space_free(ls);
87 __isl_give isl_aff *isl_aff_zero_on_domain(__isl_take isl_local_space *ls)
91 aff = isl_aff_alloc(ls);
95 isl_int_set_si(aff->v->el[0], 1);
96 isl_seq_clr(aff->v->el + 1, aff->v->size - 1);
101 /* Return a piecewise affine expression defined on the specified domain
102 * that is equal to zero.
104 __isl_give isl_pw_aff *isl_pw_aff_zero_on_domain(__isl_take isl_local_space *ls)
106 return isl_pw_aff_from_aff(isl_aff_zero_on_domain(ls));
109 /* Return an affine expression that is equal to the specified dimension
112 __isl_give isl_aff *isl_aff_var_on_domain(__isl_take isl_local_space *ls,
113 enum isl_dim_type type, unsigned pos)
121 space = isl_local_space_get_space(ls);
124 if (isl_space_is_map(space))
125 isl_die(isl_space_get_ctx(space), isl_error_invalid,
126 "expecting (parameter) set space", goto error);
127 if (pos >= isl_local_space_dim(ls, type))
128 isl_die(isl_space_get_ctx(space), isl_error_invalid,
129 "position out of bounds", goto error);
131 isl_space_free(space);
132 aff = isl_aff_alloc(ls);
136 pos += isl_local_space_offset(aff->ls, type);
138 isl_int_set_si(aff->v->el[0], 1);
139 isl_seq_clr(aff->v->el + 1, aff->v->size - 1);
140 isl_int_set_si(aff->v->el[1 + pos], 1);
144 isl_local_space_free(ls);
145 isl_space_free(space);
149 /* Return a piecewise affine expression that is equal to
150 * the specified dimension in "ls".
152 __isl_give isl_pw_aff *isl_pw_aff_var_on_domain(__isl_take isl_local_space *ls,
153 enum isl_dim_type type, unsigned pos)
155 return isl_pw_aff_from_aff(isl_aff_var_on_domain(ls, type, pos));
158 __isl_give isl_aff *isl_aff_copy(__isl_keep isl_aff *aff)
167 __isl_give isl_aff *isl_aff_dup(__isl_keep isl_aff *aff)
172 return isl_aff_alloc_vec(isl_local_space_copy(aff->ls),
173 isl_vec_copy(aff->v));
176 __isl_give isl_aff *isl_aff_cow(__isl_take isl_aff *aff)
184 return isl_aff_dup(aff);
187 void *isl_aff_free(__isl_take isl_aff *aff)
195 isl_local_space_free(aff->ls);
196 isl_vec_free(aff->v);
203 isl_ctx *isl_aff_get_ctx(__isl_keep isl_aff *aff)
205 return aff ? isl_local_space_get_ctx(aff->ls) : NULL;
208 /* Externally, an isl_aff has a map space, but internally, the
209 * ls field corresponds to the domain of that space.
211 int isl_aff_dim(__isl_keep isl_aff *aff, enum isl_dim_type type)
215 if (type == isl_dim_out)
217 if (type == isl_dim_in)
219 return isl_local_space_dim(aff->ls, type);
222 __isl_give isl_space *isl_aff_get_domain_space(__isl_keep isl_aff *aff)
224 return aff ? isl_local_space_get_space(aff->ls) : NULL;
227 __isl_give isl_space *isl_aff_get_space(__isl_keep isl_aff *aff)
232 space = isl_local_space_get_space(aff->ls);
233 space = isl_space_from_domain(space);
234 space = isl_space_add_dims(space, isl_dim_out, 1);
238 __isl_give isl_local_space *isl_aff_get_domain_local_space(
239 __isl_keep isl_aff *aff)
241 return aff ? isl_local_space_copy(aff->ls) : NULL;
244 __isl_give isl_local_space *isl_aff_get_local_space(__isl_keep isl_aff *aff)
249 ls = isl_local_space_copy(aff->ls);
250 ls = isl_local_space_from_domain(ls);
251 ls = isl_local_space_add_dims(ls, isl_dim_out, 1);
255 /* Externally, an isl_aff has a map space, but internally, the
256 * ls field corresponds to the domain of that space.
258 const char *isl_aff_get_dim_name(__isl_keep isl_aff *aff,
259 enum isl_dim_type type, unsigned pos)
263 if (type == isl_dim_out)
265 if (type == isl_dim_in)
267 return isl_local_space_get_dim_name(aff->ls, type, pos);
270 __isl_give isl_aff *isl_aff_reset_domain_space(__isl_take isl_aff *aff,
271 __isl_take isl_space *dim)
273 aff = isl_aff_cow(aff);
277 aff->ls = isl_local_space_reset_space(aff->ls, dim);
279 return isl_aff_free(aff);
288 /* Reset the space of "aff". This function is called from isl_pw_templ.c
289 * and doesn't know if the space of an element object is represented
290 * directly or through its domain. It therefore passes along both.
292 __isl_give isl_aff *isl_aff_reset_space_and_domain(__isl_take isl_aff *aff,
293 __isl_take isl_space *space, __isl_take isl_space *domain)
295 isl_space_free(space);
296 return isl_aff_reset_domain_space(aff, domain);
299 /* Reorder the coefficients of the affine expression based
300 * on the given reodering.
301 * The reordering r is assumed to have been extended with the local
304 static __isl_give isl_vec *vec_reorder(__isl_take isl_vec *vec,
305 __isl_take isl_reordering *r, int n_div)
313 res = isl_vec_alloc(vec->ctx,
314 2 + isl_space_dim(r->dim, isl_dim_all) + n_div);
315 isl_seq_cpy(res->el, vec->el, 2);
316 isl_seq_clr(res->el + 2, res->size - 2);
317 for (i = 0; i < r->len; ++i)
318 isl_int_set(res->el[2 + r->pos[i]], vec->el[2 + i]);
320 isl_reordering_free(r);
325 isl_reordering_free(r);
329 /* Reorder the dimensions of the domain of "aff" according
330 * to the given reordering.
332 __isl_give isl_aff *isl_aff_realign_domain(__isl_take isl_aff *aff,
333 __isl_take isl_reordering *r)
335 aff = isl_aff_cow(aff);
339 r = isl_reordering_extend(r, aff->ls->div->n_row);
340 aff->v = vec_reorder(aff->v, isl_reordering_copy(r),
341 aff->ls->div->n_row);
342 aff->ls = isl_local_space_realign(aff->ls, r);
344 if (!aff->v || !aff->ls)
345 return isl_aff_free(aff);
350 isl_reordering_free(r);
354 __isl_give isl_aff *isl_aff_align_params(__isl_take isl_aff *aff,
355 __isl_take isl_space *model)
360 if (!isl_space_match(aff->ls->dim, isl_dim_param,
361 model, isl_dim_param)) {
364 model = isl_space_drop_dims(model, isl_dim_in,
365 0, isl_space_dim(model, isl_dim_in));
366 model = isl_space_drop_dims(model, isl_dim_out,
367 0, isl_space_dim(model, isl_dim_out));
368 exp = isl_parameter_alignment_reordering(aff->ls->dim, model);
369 exp = isl_reordering_extend_space(exp,
370 isl_aff_get_domain_space(aff));
371 aff = isl_aff_realign_domain(aff, exp);
374 isl_space_free(model);
377 isl_space_free(model);
382 int isl_aff_plain_is_zero(__isl_keep isl_aff *aff)
387 return isl_seq_first_non_zero(aff->v->el + 1, aff->v->size - 1) < 0;
390 int isl_aff_plain_is_equal(__isl_keep isl_aff *aff1, __isl_keep isl_aff *aff2)
397 equal = isl_local_space_is_equal(aff1->ls, aff2->ls);
398 if (equal < 0 || !equal)
401 return isl_vec_is_equal(aff1->v, aff2->v);
404 int isl_aff_get_denominator(__isl_keep isl_aff *aff, isl_int *v)
408 isl_int_set(*v, aff->v->el[0]);
412 /* Return the common denominator of "aff".
414 __isl_give isl_val *isl_aff_get_denominator_val(__isl_keep isl_aff *aff)
421 ctx = isl_aff_get_ctx(aff);
422 return isl_val_int_from_isl_int(ctx, aff->v->el[0]);
425 int isl_aff_get_constant(__isl_keep isl_aff *aff, isl_int *v)
429 isl_int_set(*v, aff->v->el[1]);
433 /* Return the constant term of "aff".
435 __isl_give isl_val *isl_aff_get_constant_val(__isl_keep isl_aff *aff)
443 ctx = isl_aff_get_ctx(aff);
444 v = isl_val_rat_from_isl_int(ctx, aff->v->el[1], aff->v->el[0]);
445 return isl_val_normalize(v);
448 int isl_aff_get_coefficient(__isl_keep isl_aff *aff,
449 enum isl_dim_type type, int pos, isl_int *v)
454 if (type == isl_dim_out)
455 isl_die(aff->v->ctx, isl_error_invalid,
456 "output/set dimension does not have a coefficient",
458 if (type == isl_dim_in)
461 if (pos >= isl_local_space_dim(aff->ls, type))
462 isl_die(aff->v->ctx, isl_error_invalid,
463 "position out of bounds", return -1);
465 pos += isl_local_space_offset(aff->ls, type);
466 isl_int_set(*v, aff->v->el[1 + pos]);
471 /* Return the coefficient of the variable of type "type" at position "pos"
474 __isl_give isl_val *isl_aff_get_coefficient_val(__isl_keep isl_aff *aff,
475 enum isl_dim_type type, int pos)
483 ctx = isl_aff_get_ctx(aff);
484 if (type == isl_dim_out)
485 isl_die(ctx, isl_error_invalid,
486 "output/set dimension does not have a coefficient",
488 if (type == isl_dim_in)
491 if (pos >= isl_local_space_dim(aff->ls, type))
492 isl_die(ctx, isl_error_invalid,
493 "position out of bounds", return NULL);
495 pos += isl_local_space_offset(aff->ls, type);
496 v = isl_val_rat_from_isl_int(ctx, aff->v->el[1 + pos], aff->v->el[0]);
497 return isl_val_normalize(v);
500 __isl_give isl_aff *isl_aff_set_denominator(__isl_take isl_aff *aff, isl_int v)
502 aff = isl_aff_cow(aff);
506 aff->v = isl_vec_cow(aff->v);
508 return isl_aff_free(aff);
510 isl_int_set(aff->v->el[0], v);
515 __isl_give isl_aff *isl_aff_set_constant(__isl_take isl_aff *aff, isl_int v)
517 aff = isl_aff_cow(aff);
521 aff->v = isl_vec_cow(aff->v);
523 return isl_aff_free(aff);
525 isl_int_set(aff->v->el[1], v);
530 /* Replace the constant term of "aff" by "v".
532 __isl_give isl_aff *isl_aff_set_constant_val(__isl_take isl_aff *aff,
533 __isl_take isl_val *v)
538 if (!isl_val_is_rat(v))
539 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
540 "expecting rational value", goto error);
542 if (isl_int_eq(aff->v->el[1], v->n) &&
543 isl_int_eq(aff->v->el[0], v->d)) {
548 aff = isl_aff_cow(aff);
551 aff->v = isl_vec_cow(aff->v);
555 if (isl_int_eq(aff->v->el[0], v->d)) {
556 isl_int_set(aff->v->el[1], v->n);
557 } else if (isl_int_is_one(v->d)) {
558 isl_int_mul(aff->v->el[1], aff->v->el[0], v->n);
560 isl_seq_scale(aff->v->el + 1,
561 aff->v->el + 1, v->d, aff->v->size - 1);
562 isl_int_mul(aff->v->el[1], aff->v->el[0], v->n);
563 isl_int_mul(aff->v->el[0], aff->v->el[0], v->d);
564 aff->v = isl_vec_normalize(aff->v);
577 __isl_give isl_aff *isl_aff_add_constant(__isl_take isl_aff *aff, isl_int v)
579 if (isl_int_is_zero(v))
582 aff = isl_aff_cow(aff);
586 aff->v = isl_vec_cow(aff->v);
588 return isl_aff_free(aff);
590 isl_int_addmul(aff->v->el[1], aff->v->el[0], v);
595 /* Add "v" to the constant term of "aff".
597 __isl_give isl_aff *isl_aff_add_constant_val(__isl_take isl_aff *aff,
598 __isl_take isl_val *v)
603 if (isl_val_is_zero(v)) {
608 if (!isl_val_is_rat(v))
609 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
610 "expecting rational value", goto error);
612 aff = isl_aff_cow(aff);
616 aff->v = isl_vec_cow(aff->v);
620 if (isl_int_is_one(v->d)) {
621 isl_int_addmul(aff->v->el[1], aff->v->el[0], v->n);
622 } else if (isl_int_eq(aff->v->el[0], v->d)) {
623 isl_int_add(aff->v->el[1], aff->v->el[1], v->n);
624 aff->v = isl_vec_normalize(aff->v);
628 isl_seq_scale(aff->v->el + 1,
629 aff->v->el + 1, v->d, aff->v->size - 1);
630 isl_int_addmul(aff->v->el[1], aff->v->el[0], v->n);
631 isl_int_mul(aff->v->el[0], aff->v->el[0], v->d);
632 aff->v = isl_vec_normalize(aff->v);
645 __isl_give isl_aff *isl_aff_add_constant_si(__isl_take isl_aff *aff, int v)
650 isl_int_set_si(t, v);
651 aff = isl_aff_add_constant(aff, t);
657 /* Add "v" to the numerator of the constant term of "aff".
659 __isl_give isl_aff *isl_aff_add_constant_num(__isl_take isl_aff *aff, isl_int v)
661 if (isl_int_is_zero(v))
664 aff = isl_aff_cow(aff);
668 aff->v = isl_vec_cow(aff->v);
670 return isl_aff_free(aff);
672 isl_int_add(aff->v->el[1], aff->v->el[1], v);
677 /* Add "v" to the numerator of the constant term of "aff".
679 __isl_give isl_aff *isl_aff_add_constant_num_si(__isl_take isl_aff *aff, int v)
687 isl_int_set_si(t, v);
688 aff = isl_aff_add_constant_num(aff, t);
694 __isl_give isl_aff *isl_aff_set_constant_si(__isl_take isl_aff *aff, int v)
696 aff = isl_aff_cow(aff);
700 aff->v = isl_vec_cow(aff->v);
702 return isl_aff_free(aff);
704 isl_int_set_si(aff->v->el[1], v);
709 __isl_give isl_aff *isl_aff_set_coefficient(__isl_take isl_aff *aff,
710 enum isl_dim_type type, int pos, isl_int v)
715 if (type == isl_dim_out)
716 isl_die(aff->v->ctx, isl_error_invalid,
717 "output/set dimension does not have a coefficient",
718 return isl_aff_free(aff));
719 if (type == isl_dim_in)
722 if (pos >= isl_local_space_dim(aff->ls, type))
723 isl_die(aff->v->ctx, isl_error_invalid,
724 "position out of bounds", return isl_aff_free(aff));
726 aff = isl_aff_cow(aff);
730 aff->v = isl_vec_cow(aff->v);
732 return isl_aff_free(aff);
734 pos += isl_local_space_offset(aff->ls, type);
735 isl_int_set(aff->v->el[1 + pos], v);
740 __isl_give isl_aff *isl_aff_set_coefficient_si(__isl_take isl_aff *aff,
741 enum isl_dim_type type, int pos, int v)
746 if (type == isl_dim_out)
747 isl_die(aff->v->ctx, isl_error_invalid,
748 "output/set dimension does not have a coefficient",
749 return isl_aff_free(aff));
750 if (type == isl_dim_in)
753 if (pos >= isl_local_space_dim(aff->ls, type))
754 isl_die(aff->v->ctx, isl_error_invalid,
755 "position out of bounds", return isl_aff_free(aff));
757 aff = isl_aff_cow(aff);
761 aff->v = isl_vec_cow(aff->v);
763 return isl_aff_free(aff);
765 pos += isl_local_space_offset(aff->ls, type);
766 isl_int_set_si(aff->v->el[1 + pos], v);
771 /* Replace the coefficient of the variable of type "type" at position "pos"
774 __isl_give isl_aff *isl_aff_set_coefficient_val(__isl_take isl_aff *aff,
775 enum isl_dim_type type, int pos, __isl_take isl_val *v)
780 if (type == isl_dim_out)
781 isl_die(aff->v->ctx, isl_error_invalid,
782 "output/set dimension does not have a coefficient",
784 if (type == isl_dim_in)
787 if (pos >= isl_local_space_dim(aff->ls, type))
788 isl_die(aff->v->ctx, isl_error_invalid,
789 "position out of bounds", goto error);
791 if (!isl_val_is_rat(v))
792 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
793 "expecting rational value", goto error);
795 pos += isl_local_space_offset(aff->ls, type);
796 if (isl_int_eq(aff->v->el[1 + pos], v->n) &&
797 isl_int_eq(aff->v->el[0], v->d)) {
802 aff = isl_aff_cow(aff);
805 aff->v = isl_vec_cow(aff->v);
809 if (isl_int_eq(aff->v->el[0], v->d)) {
810 isl_int_set(aff->v->el[1 + pos], v->n);
811 } else if (isl_int_is_one(v->d)) {
812 isl_int_mul(aff->v->el[1 + pos], aff->v->el[0], v->n);
814 isl_seq_scale(aff->v->el + 1,
815 aff->v->el + 1, v->d, aff->v->size - 1);
816 isl_int_mul(aff->v->el[1 + pos], aff->v->el[0], v->n);
817 isl_int_mul(aff->v->el[0], aff->v->el[0], v->d);
818 aff->v = isl_vec_normalize(aff->v);
831 __isl_give isl_aff *isl_aff_add_coefficient(__isl_take isl_aff *aff,
832 enum isl_dim_type type, int pos, isl_int v)
837 if (type == isl_dim_out)
838 isl_die(aff->v->ctx, isl_error_invalid,
839 "output/set dimension does not have a coefficient",
840 return isl_aff_free(aff));
841 if (type == isl_dim_in)
844 if (pos >= isl_local_space_dim(aff->ls, type))
845 isl_die(aff->v->ctx, isl_error_invalid,
846 "position out of bounds", return isl_aff_free(aff));
848 aff = isl_aff_cow(aff);
852 aff->v = isl_vec_cow(aff->v);
854 return isl_aff_free(aff);
856 pos += isl_local_space_offset(aff->ls, type);
857 isl_int_addmul(aff->v->el[1 + pos], aff->v->el[0], v);
862 /* Add "v" to the coefficient of the variable of type "type"
863 * at position "pos" of "aff".
865 __isl_give isl_aff *isl_aff_add_coefficient_val(__isl_take isl_aff *aff,
866 enum isl_dim_type type, int pos, __isl_take isl_val *v)
871 if (isl_val_is_zero(v)) {
876 if (type == isl_dim_out)
877 isl_die(aff->v->ctx, isl_error_invalid,
878 "output/set dimension does not have a coefficient",
880 if (type == isl_dim_in)
883 if (pos >= isl_local_space_dim(aff->ls, type))
884 isl_die(aff->v->ctx, isl_error_invalid,
885 "position out of bounds", goto error);
887 if (!isl_val_is_rat(v))
888 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
889 "expecting rational value", goto error);
891 aff = isl_aff_cow(aff);
895 aff->v = isl_vec_cow(aff->v);
899 pos += isl_local_space_offset(aff->ls, type);
900 if (isl_int_is_one(v->d)) {
901 isl_int_addmul(aff->v->el[1 + pos], aff->v->el[0], v->n);
902 } else if (isl_int_eq(aff->v->el[0], v->d)) {
903 isl_int_add(aff->v->el[1 + pos], aff->v->el[1 + pos], v->n);
904 aff->v = isl_vec_normalize(aff->v);
908 isl_seq_scale(aff->v->el + 1,
909 aff->v->el + 1, v->d, aff->v->size - 1);
910 isl_int_addmul(aff->v->el[1 + pos], aff->v->el[0], v->n);
911 isl_int_mul(aff->v->el[0], aff->v->el[0], v->d);
912 aff->v = isl_vec_normalize(aff->v);
925 __isl_give isl_aff *isl_aff_add_coefficient_si(__isl_take isl_aff *aff,
926 enum isl_dim_type type, int pos, int v)
931 isl_int_set_si(t, v);
932 aff = isl_aff_add_coefficient(aff, type, pos, t);
938 __isl_give isl_aff *isl_aff_get_div(__isl_keep isl_aff *aff, int pos)
943 return isl_local_space_get_div(aff->ls, pos);
946 __isl_give isl_aff *isl_aff_neg(__isl_take isl_aff *aff)
948 aff = isl_aff_cow(aff);
951 aff->v = isl_vec_cow(aff->v);
953 return isl_aff_free(aff);
955 isl_seq_neg(aff->v->el + 1, aff->v->el + 1, aff->v->size - 1);
960 /* Remove divs from the local space that do not appear in the affine
962 * We currently only remove divs at the end.
963 * Some intermediate divs may also not appear directly in the affine
964 * expression, but we would also need to check that no other divs are
965 * defined in terms of them.
967 __isl_give isl_aff *isl_aff_remove_unused_divs( __isl_take isl_aff *aff)
976 n = isl_local_space_dim(aff->ls, isl_dim_div);
977 off = isl_local_space_offset(aff->ls, isl_dim_div);
979 pos = isl_seq_last_non_zero(aff->v->el + 1 + off, n) + 1;
983 aff = isl_aff_cow(aff);
987 aff->ls = isl_local_space_drop_dims(aff->ls, isl_dim_div, pos, n - pos);
988 aff->v = isl_vec_drop_els(aff->v, 1 + off + pos, n - pos);
989 if (!aff->ls || !aff->v)
990 return isl_aff_free(aff);
995 /* Given two affine expressions "p" of length p_len (including the
996 * denominator and the constant term) and "subs" of length subs_len,
997 * plug in "subs" for the variable at position "pos".
998 * The variables of "subs" and "p" are assumed to match up to subs_len,
999 * but "p" may have additional variables.
1000 * "v" is an initialized isl_int that can be used internally.
1002 * In particular, if "p" represents the expression
1006 * with i the variable at position "pos" and "subs" represents the expression
1010 * then the result represents the expression
1015 void isl_seq_substitute(isl_int *p, int pos, isl_int *subs,
1016 int p_len, int subs_len, isl_int v)
1018 isl_int_set(v, p[1 + pos]);
1019 isl_int_set_si(p[1 + pos], 0);
1020 isl_seq_combine(p + 1, subs[0], p + 1, v, subs + 1, subs_len - 1);
1021 isl_seq_scale(p + subs_len, p + subs_len, subs[0], p_len - subs_len);
1022 isl_int_mul(p[0], p[0], subs[0]);
1025 /* Look for any divs in the aff->ls with a denominator equal to one
1026 * and plug them into the affine expression and any subsequent divs
1027 * that may reference the div.
1029 static __isl_give isl_aff *plug_in_integral_divs(__isl_take isl_aff *aff)
1035 isl_local_space *ls;
1041 n = isl_local_space_dim(aff->ls, isl_dim_div);
1043 for (i = 0; i < n; ++i) {
1044 if (!isl_int_is_one(aff->ls->div->row[i][0]))
1046 ls = isl_local_space_copy(aff->ls);
1047 ls = isl_local_space_substitute_seq(ls, isl_dim_div, i,
1048 aff->ls->div->row[i], len, i + 1, n - (i + 1));
1049 vec = isl_vec_copy(aff->v);
1050 vec = isl_vec_cow(vec);
1056 pos = isl_local_space_offset(aff->ls, isl_dim_div) + i;
1057 isl_seq_substitute(vec->el, pos, aff->ls->div->row[i],
1062 isl_vec_free(aff->v);
1064 isl_local_space_free(aff->ls);
1071 isl_local_space_free(ls);
1072 return isl_aff_free(aff);
1075 /* Look for any divs j that appear with a unit coefficient inside
1076 * the definitions of other divs i and plug them into the definitions
1079 * In particular, an expression of the form
1081 * floor((f(..) + floor(g(..)/n))/m)
1085 * floor((n * f(..) + g(..))/(n * m))
1087 * This simplification is correct because we can move the expression
1088 * f(..) into the inner floor in the original expression to obtain
1090 * floor(floor((n * f(..) + g(..))/n)/m)
1092 * from which we can derive the simplified expression.
1094 static __isl_give isl_aff *plug_in_unit_divs(__isl_take isl_aff *aff)
1102 n = isl_local_space_dim(aff->ls, isl_dim_div);
1103 off = isl_local_space_offset(aff->ls, isl_dim_div);
1104 for (i = 1; i < n; ++i) {
1105 for (j = 0; j < i; ++j) {
1106 if (!isl_int_is_one(aff->ls->div->row[i][1 + off + j]))
1108 aff->ls = isl_local_space_substitute_seq(aff->ls,
1109 isl_dim_div, j, aff->ls->div->row[j],
1110 aff->v->size, i, 1);
1112 return isl_aff_free(aff);
1119 /* Swap divs "a" and "b" in "aff", which is assumed to be non-NULL.
1121 * Even though this function is only called on isl_affs with a single
1122 * reference, we are careful to only change aff->v and aff->ls together.
1124 static __isl_give isl_aff *swap_div(__isl_take isl_aff *aff, int a, int b)
1126 unsigned off = isl_local_space_offset(aff->ls, isl_dim_div);
1127 isl_local_space *ls;
1130 ls = isl_local_space_copy(aff->ls);
1131 ls = isl_local_space_swap_div(ls, a, b);
1132 v = isl_vec_copy(aff->v);
1137 isl_int_swap(v->el[1 + off + a], v->el[1 + off + b]);
1138 isl_vec_free(aff->v);
1140 isl_local_space_free(aff->ls);
1146 isl_local_space_free(ls);
1147 return isl_aff_free(aff);
1150 /* Merge divs "a" and "b" in "aff", which is assumed to be non-NULL.
1152 * We currently do not actually remove div "b", but simply add its
1153 * coefficient to that of "a" and then zero it out.
1155 static __isl_give isl_aff *merge_divs(__isl_take isl_aff *aff, int a, int b)
1157 unsigned off = isl_local_space_offset(aff->ls, isl_dim_div);
1159 if (isl_int_is_zero(aff->v->el[1 + off + b]))
1162 aff->v = isl_vec_cow(aff->v);
1164 return isl_aff_free(aff);
1166 isl_int_add(aff->v->el[1 + off + a],
1167 aff->v->el[1 + off + a], aff->v->el[1 + off + b]);
1168 isl_int_set_si(aff->v->el[1 + off + b], 0);
1173 /* Sort the divs in the local space of "aff" according to
1174 * the comparison function "cmp_row" in isl_local_space.c,
1175 * combining the coefficients of identical divs.
1177 * Reordering divs does not change the semantics of "aff",
1178 * so there is no need to call isl_aff_cow.
1179 * Moreover, this function is currently only called on isl_affs
1180 * with a single reference.
1182 static __isl_give isl_aff *sort_divs(__isl_take isl_aff *aff)
1190 off = isl_local_space_offset(aff->ls, isl_dim_div);
1191 n = isl_aff_dim(aff, isl_dim_div);
1192 for (i = 1; i < n; ++i) {
1193 for (j = i - 1; j >= 0; --j) {
1194 int cmp = isl_mat_cmp_div(aff->ls->div, j, j + 1);
1198 aff = merge_divs(aff, j, j + 1);
1200 aff = swap_div(aff, j, j + 1);
1209 /* Normalize the representation of "aff".
1211 * This function should only be called of "new" isl_affs, i.e.,
1212 * with only a single reference. We therefore do not need to
1213 * worry about affecting other instances.
1215 __isl_give isl_aff *isl_aff_normalize(__isl_take isl_aff *aff)
1219 aff->v = isl_vec_normalize(aff->v);
1221 return isl_aff_free(aff);
1222 aff = plug_in_integral_divs(aff);
1223 aff = plug_in_unit_divs(aff);
1224 aff = sort_divs(aff);
1225 aff = isl_aff_remove_unused_divs(aff);
1229 /* Given f, return floor(f).
1230 * If f is an integer expression, then just return f.
1231 * If f is a constant, then return the constant floor(f).
1232 * Otherwise, if f = g/m, write g = q m + r,
1233 * create a new div d = [r/m] and return the expression q + d.
1234 * The coefficients in r are taken to lie between -m/2 and m/2.
1236 __isl_give isl_aff *isl_aff_floor(__isl_take isl_aff *aff)
1246 if (isl_int_is_one(aff->v->el[0]))
1249 aff = isl_aff_cow(aff);
1253 aff->v = isl_vec_cow(aff->v);
1255 return isl_aff_free(aff);
1257 if (isl_aff_is_cst(aff)) {
1258 isl_int_fdiv_q(aff->v->el[1], aff->v->el[1], aff->v->el[0]);
1259 isl_int_set_si(aff->v->el[0], 1);
1263 div = isl_vec_copy(aff->v);
1264 div = isl_vec_cow(div);
1266 return isl_aff_free(aff);
1268 ctx = isl_aff_get_ctx(aff);
1269 isl_int_fdiv_q(aff->v->el[0], aff->v->el[0], ctx->two);
1270 for (i = 1; i < aff->v->size; ++i) {
1271 isl_int_fdiv_r(div->el[i], div->el[i], div->el[0]);
1272 isl_int_fdiv_q(aff->v->el[i], aff->v->el[i], div->el[0]);
1273 if (isl_int_gt(div->el[i], aff->v->el[0])) {
1274 isl_int_sub(div->el[i], div->el[i], div->el[0]);
1275 isl_int_add_ui(aff->v->el[i], aff->v->el[i], 1);
1279 aff->ls = isl_local_space_add_div(aff->ls, div);
1281 return isl_aff_free(aff);
1283 size = aff->v->size;
1284 aff->v = isl_vec_extend(aff->v, size + 1);
1286 return isl_aff_free(aff);
1287 isl_int_set_si(aff->v->el[0], 1);
1288 isl_int_set_si(aff->v->el[size], 1);
1290 aff = isl_aff_normalize(aff);
1297 * aff mod m = aff - m * floor(aff/m)
1299 __isl_give isl_aff *isl_aff_mod(__isl_take isl_aff *aff, isl_int m)
1303 res = isl_aff_copy(aff);
1304 aff = isl_aff_scale_down(aff, m);
1305 aff = isl_aff_floor(aff);
1306 aff = isl_aff_scale(aff, m);
1307 res = isl_aff_sub(res, aff);
1314 * aff mod m = aff - m * floor(aff/m)
1316 * with m an integer value.
1318 __isl_give isl_aff *isl_aff_mod_val(__isl_take isl_aff *aff,
1319 __isl_take isl_val *m)
1326 if (!isl_val_is_int(m))
1327 isl_die(isl_val_get_ctx(m), isl_error_invalid,
1328 "expecting integer modulo", goto error);
1330 res = isl_aff_copy(aff);
1331 aff = isl_aff_scale_down_val(aff, isl_val_copy(m));
1332 aff = isl_aff_floor(aff);
1333 aff = isl_aff_scale_val(aff, m);
1334 res = isl_aff_sub(res, aff);
1345 * pwaff mod m = pwaff - m * floor(pwaff/m)
1347 __isl_give isl_pw_aff *isl_pw_aff_mod(__isl_take isl_pw_aff *pwaff, isl_int m)
1351 res = isl_pw_aff_copy(pwaff);
1352 pwaff = isl_pw_aff_scale_down(pwaff, m);
1353 pwaff = isl_pw_aff_floor(pwaff);
1354 pwaff = isl_pw_aff_scale(pwaff, m);
1355 res = isl_pw_aff_sub(res, pwaff);
1362 * pa mod m = pa - m * floor(pa/m)
1364 * with m an integer value.
1366 __isl_give isl_pw_aff *isl_pw_aff_mod_val(__isl_take isl_pw_aff *pa,
1367 __isl_take isl_val *m)
1371 if (!isl_val_is_int(m))
1372 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
1373 "expecting integer modulo", goto error);
1374 pa = isl_pw_aff_mod(pa, m->n);
1378 isl_pw_aff_free(pa);
1383 /* Given f, return ceil(f).
1384 * If f is an integer expression, then just return f.
1385 * Otherwise, let f be the expression
1391 * floor((e + m - 1)/m)
1393 __isl_give isl_aff *isl_aff_ceil(__isl_take isl_aff *aff)
1398 if (isl_int_is_one(aff->v->el[0]))
1401 aff = isl_aff_cow(aff);
1404 aff->v = isl_vec_cow(aff->v);
1406 return isl_aff_free(aff);
1408 isl_int_add(aff->v->el[1], aff->v->el[1], aff->v->el[0]);
1409 isl_int_sub_ui(aff->v->el[1], aff->v->el[1], 1);
1410 aff = isl_aff_floor(aff);
1415 /* Apply the expansion computed by isl_merge_divs.
1416 * The expansion itself is given by "exp" while the resulting
1417 * list of divs is given by "div".
1419 __isl_give isl_aff *isl_aff_expand_divs( __isl_take isl_aff *aff,
1420 __isl_take isl_mat *div, int *exp)
1427 aff = isl_aff_cow(aff);
1431 old_n_div = isl_local_space_dim(aff->ls, isl_dim_div);
1432 new_n_div = isl_mat_rows(div);
1433 if (new_n_div < old_n_div)
1434 isl_die(isl_mat_get_ctx(div), isl_error_invalid,
1435 "not an expansion", goto error);
1437 aff->v = isl_vec_extend(aff->v, aff->v->size + new_n_div - old_n_div);
1441 offset = 1 + isl_local_space_offset(aff->ls, isl_dim_div);
1443 for (i = new_n_div - 1; i >= 0; --i) {
1444 if (j >= 0 && exp[j] == i) {
1446 isl_int_swap(aff->v->el[offset + i],
1447 aff->v->el[offset + j]);
1450 isl_int_set_si(aff->v->el[offset + i], 0);
1453 aff->ls = isl_local_space_replace_divs(aff->ls, isl_mat_copy(div));
1464 /* Add two affine expressions that live in the same local space.
1466 static __isl_give isl_aff *add_expanded(__isl_take isl_aff *aff1,
1467 __isl_take isl_aff *aff2)
1471 aff1 = isl_aff_cow(aff1);
1475 aff1->v = isl_vec_cow(aff1->v);
1481 isl_int_gcd(gcd, aff1->v->el[0], aff2->v->el[0]);
1482 isl_int_divexact(f, aff2->v->el[0], gcd);
1483 isl_seq_scale(aff1->v->el + 1, aff1->v->el + 1, f, aff1->v->size - 1);
1484 isl_int_divexact(f, aff1->v->el[0], gcd);
1485 isl_seq_addmul(aff1->v->el + 1, f, aff2->v->el + 1, aff1->v->size - 1);
1486 isl_int_divexact(f, aff2->v->el[0], gcd);
1487 isl_int_mul(aff1->v->el[0], aff1->v->el[0], f);
1499 __isl_give isl_aff *isl_aff_add(__isl_take isl_aff *aff1,
1500 __isl_take isl_aff *aff2)
1510 ctx = isl_aff_get_ctx(aff1);
1511 if (!isl_space_is_equal(aff1->ls->dim, aff2->ls->dim))
1512 isl_die(ctx, isl_error_invalid,
1513 "spaces don't match", goto error);
1515 if (aff1->ls->div->n_row == 0 && aff2->ls->div->n_row == 0)
1516 return add_expanded(aff1, aff2);
1518 exp1 = isl_alloc_array(ctx, int, aff1->ls->div->n_row);
1519 exp2 = isl_alloc_array(ctx, int, aff2->ls->div->n_row);
1523 div = isl_merge_divs(aff1->ls->div, aff2->ls->div, exp1, exp2);
1524 aff1 = isl_aff_expand_divs(aff1, isl_mat_copy(div), exp1);
1525 aff2 = isl_aff_expand_divs(aff2, div, exp2);
1529 return add_expanded(aff1, aff2);
1538 __isl_give isl_aff *isl_aff_sub(__isl_take isl_aff *aff1,
1539 __isl_take isl_aff *aff2)
1541 return isl_aff_add(aff1, isl_aff_neg(aff2));
1544 __isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff, isl_int f)
1548 if (isl_int_is_one(f))
1551 aff = isl_aff_cow(aff);
1554 aff->v = isl_vec_cow(aff->v);
1556 return isl_aff_free(aff);
1558 if (isl_int_is_pos(f) && isl_int_is_divisible_by(aff->v->el[0], f)) {
1559 isl_int_divexact(aff->v->el[0], aff->v->el[0], f);
1564 isl_int_gcd(gcd, aff->v->el[0], f);
1565 isl_int_divexact(aff->v->el[0], aff->v->el[0], gcd);
1566 isl_int_divexact(gcd, f, gcd);
1567 isl_seq_scale(aff->v->el + 1, aff->v->el + 1, gcd, aff->v->size - 1);
1573 /* Multiple "aff" by "v".
1575 __isl_give isl_aff *isl_aff_scale_val(__isl_take isl_aff *aff,
1576 __isl_take isl_val *v)
1581 if (isl_val_is_one(v)) {
1586 if (!isl_val_is_rat(v))
1587 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
1588 "expecting rational factor", goto error);
1590 aff = isl_aff_scale(aff, v->n);
1591 aff = isl_aff_scale_down(aff, v->d);
1601 __isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff, isl_int f)
1605 if (isl_int_is_one(f))
1608 aff = isl_aff_cow(aff);
1612 if (isl_int_is_zero(f))
1613 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
1614 "cannot scale down by zero", return isl_aff_free(aff));
1616 aff->v = isl_vec_cow(aff->v);
1618 return isl_aff_free(aff);
1621 isl_seq_gcd(aff->v->el + 1, aff->v->size - 1, &gcd);
1622 isl_int_gcd(gcd, gcd, f);
1623 isl_seq_scale_down(aff->v->el + 1, aff->v->el + 1, gcd, aff->v->size - 1);
1624 isl_int_divexact(gcd, f, gcd);
1625 isl_int_mul(aff->v->el[0], aff->v->el[0], gcd);
1631 /* Divide "aff" by "v".
1633 __isl_give isl_aff *isl_aff_scale_down_val(__isl_take isl_aff *aff,
1634 __isl_take isl_val *v)
1639 if (isl_val_is_one(v)) {
1644 if (!isl_val_is_rat(v))
1645 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
1646 "expecting rational factor", goto error);
1647 if (!isl_val_is_pos(v))
1648 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
1649 "factor needs to be positive", goto error);
1651 aff = isl_aff_scale(aff, v->d);
1652 aff = isl_aff_scale_down(aff, v->n);
1662 __isl_give isl_aff *isl_aff_scale_down_ui(__isl_take isl_aff *aff, unsigned f)
1670 isl_int_set_ui(v, f);
1671 aff = isl_aff_scale_down(aff, v);
1677 __isl_give isl_aff *isl_aff_set_dim_name(__isl_take isl_aff *aff,
1678 enum isl_dim_type type, unsigned pos, const char *s)
1680 aff = isl_aff_cow(aff);
1683 if (type == isl_dim_out)
1684 isl_die(aff->v->ctx, isl_error_invalid,
1685 "cannot set name of output/set dimension",
1686 return isl_aff_free(aff));
1687 if (type == isl_dim_in)
1689 aff->ls = isl_local_space_set_dim_name(aff->ls, type, pos, s);
1691 return isl_aff_free(aff);
1696 __isl_give isl_aff *isl_aff_set_dim_id(__isl_take isl_aff *aff,
1697 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
1699 aff = isl_aff_cow(aff);
1701 return isl_id_free(id);
1702 if (type == isl_dim_out)
1703 isl_die(aff->v->ctx, isl_error_invalid,
1704 "cannot set name of output/set dimension",
1706 if (type == isl_dim_in)
1708 aff->ls = isl_local_space_set_dim_id(aff->ls, type, pos, id);
1710 return isl_aff_free(aff);
1719 /* Exploit the equalities in "eq" to simplify the affine expression
1720 * and the expressions of the integer divisions in the local space.
1721 * The integer divisions in this local space are assumed to appear
1722 * as regular dimensions in "eq".
1724 static __isl_give isl_aff *isl_aff_substitute_equalities_lifted(
1725 __isl_take isl_aff *aff, __isl_take isl_basic_set *eq)
1733 if (eq->n_eq == 0) {
1734 isl_basic_set_free(eq);
1738 aff = isl_aff_cow(aff);
1742 aff->ls = isl_local_space_substitute_equalities(aff->ls,
1743 isl_basic_set_copy(eq));
1744 aff->v = isl_vec_cow(aff->v);
1745 if (!aff->ls || !aff->v)
1748 total = 1 + isl_space_dim(eq->dim, isl_dim_all);
1750 for (i = 0; i < eq->n_eq; ++i) {
1751 j = isl_seq_last_non_zero(eq->eq[i], total + n_div);
1752 if (j < 0 || j == 0 || j >= total)
1755 isl_seq_elim(aff->v->el + 1, eq->eq[i], j, total,
1759 isl_basic_set_free(eq);
1760 aff = isl_aff_normalize(aff);
1763 isl_basic_set_free(eq);
1768 /* Exploit the equalities in "eq" to simplify the affine expression
1769 * and the expressions of the integer divisions in the local space.
1771 static __isl_give isl_aff *isl_aff_substitute_equalities(
1772 __isl_take isl_aff *aff, __isl_take isl_basic_set *eq)
1778 n_div = isl_local_space_dim(aff->ls, isl_dim_div);
1780 eq = isl_basic_set_add_dims(eq, isl_dim_set, n_div);
1781 return isl_aff_substitute_equalities_lifted(aff, eq);
1783 isl_basic_set_free(eq);
1788 /* Look for equalities among the variables shared by context and aff
1789 * and the integer divisions of aff, if any.
1790 * The equalities are then used to eliminate coefficients and/or integer
1791 * divisions from aff.
1793 __isl_give isl_aff *isl_aff_gist(__isl_take isl_aff *aff,
1794 __isl_take isl_set *context)
1796 isl_basic_set *hull;
1801 n_div = isl_local_space_dim(aff->ls, isl_dim_div);
1803 isl_basic_set *bset;
1804 isl_local_space *ls;
1805 context = isl_set_add_dims(context, isl_dim_set, n_div);
1806 ls = isl_aff_get_domain_local_space(aff);
1807 bset = isl_basic_set_from_local_space(ls);
1808 bset = isl_basic_set_lift(bset);
1809 bset = isl_basic_set_flatten(bset);
1810 context = isl_set_intersect(context,
1811 isl_set_from_basic_set(bset));
1814 hull = isl_set_affine_hull(context);
1815 return isl_aff_substitute_equalities_lifted(aff, hull);
1818 isl_set_free(context);
1822 __isl_give isl_aff *isl_aff_gist_params(__isl_take isl_aff *aff,
1823 __isl_take isl_set *context)
1825 isl_set *dom_context = isl_set_universe(isl_aff_get_domain_space(aff));
1826 dom_context = isl_set_intersect_params(dom_context, context);
1827 return isl_aff_gist(aff, dom_context);
1830 /* Return a basic set containing those elements in the space
1831 * of aff where it is non-negative.
1832 * If "rational" is set, then return a rational basic set.
1834 static __isl_give isl_basic_set *aff_nonneg_basic_set(
1835 __isl_take isl_aff *aff, int rational)
1837 isl_constraint *ineq;
1838 isl_basic_set *bset;
1840 ineq = isl_inequality_from_aff(aff);
1842 bset = isl_basic_set_from_constraint(ineq);
1844 bset = isl_basic_set_set_rational(bset);
1845 bset = isl_basic_set_simplify(bset);
1849 /* Return a basic set containing those elements in the space
1850 * of aff where it is non-negative.
1852 __isl_give isl_basic_set *isl_aff_nonneg_basic_set(__isl_take isl_aff *aff)
1854 return aff_nonneg_basic_set(aff, 0);
1857 /* Return a basic set containing those elements in the domain space
1858 * of aff where it is negative.
1860 __isl_give isl_basic_set *isl_aff_neg_basic_set(__isl_take isl_aff *aff)
1862 aff = isl_aff_neg(aff);
1863 aff = isl_aff_add_constant_num_si(aff, -1);
1864 return isl_aff_nonneg_basic_set(aff);
1867 /* Return a basic set containing those elements in the space
1868 * of aff where it is zero.
1869 * If "rational" is set, then return a rational basic set.
1871 static __isl_give isl_basic_set *aff_zero_basic_set(__isl_take isl_aff *aff,
1874 isl_constraint *ineq;
1875 isl_basic_set *bset;
1877 ineq = isl_equality_from_aff(aff);
1879 bset = isl_basic_set_from_constraint(ineq);
1881 bset = isl_basic_set_set_rational(bset);
1882 bset = isl_basic_set_simplify(bset);
1886 /* Return a basic set containing those elements in the space
1887 * of aff where it is zero.
1889 __isl_give isl_basic_set *isl_aff_zero_basic_set(__isl_take isl_aff *aff)
1891 return aff_zero_basic_set(aff, 0);
1894 /* Return a basic set containing those elements in the shared space
1895 * of aff1 and aff2 where aff1 is greater than or equal to aff2.
1897 __isl_give isl_basic_set *isl_aff_ge_basic_set(__isl_take isl_aff *aff1,
1898 __isl_take isl_aff *aff2)
1900 aff1 = isl_aff_sub(aff1, aff2);
1902 return isl_aff_nonneg_basic_set(aff1);
1905 /* Return a basic set containing those elements in the shared space
1906 * of aff1 and aff2 where aff1 is smaller than or equal to aff2.
1908 __isl_give isl_basic_set *isl_aff_le_basic_set(__isl_take isl_aff *aff1,
1909 __isl_take isl_aff *aff2)
1911 return isl_aff_ge_basic_set(aff2, aff1);
1914 __isl_give isl_aff *isl_aff_add_on_domain(__isl_keep isl_set *dom,
1915 __isl_take isl_aff *aff1, __isl_take isl_aff *aff2)
1917 aff1 = isl_aff_add(aff1, aff2);
1918 aff1 = isl_aff_gist(aff1, isl_set_copy(dom));
1922 int isl_aff_is_empty(__isl_keep isl_aff *aff)
1930 /* Check whether the given affine expression has non-zero coefficient
1931 * for any dimension in the given range or if any of these dimensions
1932 * appear with non-zero coefficients in any of the integer divisions
1933 * involved in the affine expression.
1935 int isl_aff_involves_dims(__isl_keep isl_aff *aff,
1936 enum isl_dim_type type, unsigned first, unsigned n)
1948 ctx = isl_aff_get_ctx(aff);
1949 if (first + n > isl_aff_dim(aff, type))
1950 isl_die(ctx, isl_error_invalid,
1951 "range out of bounds", return -1);
1953 active = isl_local_space_get_active(aff->ls, aff->v->el + 2);
1957 first += isl_local_space_offset(aff->ls, type) - 1;
1958 for (i = 0; i < n; ++i)
1959 if (active[first + i]) {
1972 __isl_give isl_aff *isl_aff_drop_dims(__isl_take isl_aff *aff,
1973 enum isl_dim_type type, unsigned first, unsigned n)
1979 if (type == isl_dim_out)
1980 isl_die(aff->v->ctx, isl_error_invalid,
1981 "cannot drop output/set dimension",
1982 return isl_aff_free(aff));
1983 if (type == isl_dim_in)
1985 if (n == 0 && !isl_local_space_is_named_or_nested(aff->ls, type))
1988 ctx = isl_aff_get_ctx(aff);
1989 if (first + n > isl_local_space_dim(aff->ls, type))
1990 isl_die(ctx, isl_error_invalid, "range out of bounds",
1991 return isl_aff_free(aff));
1993 aff = isl_aff_cow(aff);
1997 aff->ls = isl_local_space_drop_dims(aff->ls, type, first, n);
1999 return isl_aff_free(aff);
2001 first += 1 + isl_local_space_offset(aff->ls, type);
2002 aff->v = isl_vec_drop_els(aff->v, first, n);
2004 return isl_aff_free(aff);
2009 /* Project the domain of the affine expression onto its parameter space.
2010 * The affine expression may not involve any of the domain dimensions.
2012 __isl_give isl_aff *isl_aff_project_domain_on_params(__isl_take isl_aff *aff)
2018 n = isl_aff_dim(aff, isl_dim_in);
2019 involves = isl_aff_involves_dims(aff, isl_dim_in, 0, n);
2021 return isl_aff_free(aff);
2023 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
2024 "affine expression involves some of the domain dimensions",
2025 return isl_aff_free(aff));
2026 aff = isl_aff_drop_dims(aff, isl_dim_in, 0, n);
2027 space = isl_aff_get_domain_space(aff);
2028 space = isl_space_params(space);
2029 aff = isl_aff_reset_domain_space(aff, space);
2033 __isl_give isl_aff *isl_aff_insert_dims(__isl_take isl_aff *aff,
2034 enum isl_dim_type type, unsigned first, unsigned n)
2040 if (type == isl_dim_out)
2041 isl_die(aff->v->ctx, isl_error_invalid,
2042 "cannot insert output/set dimensions",
2043 return isl_aff_free(aff));
2044 if (type == isl_dim_in)
2046 if (n == 0 && !isl_local_space_is_named_or_nested(aff->ls, type))
2049 ctx = isl_aff_get_ctx(aff);
2050 if (first > isl_local_space_dim(aff->ls, type))
2051 isl_die(ctx, isl_error_invalid, "position out of bounds",
2052 return isl_aff_free(aff));
2054 aff = isl_aff_cow(aff);
2058 aff->ls = isl_local_space_insert_dims(aff->ls, type, first, n);
2060 return isl_aff_free(aff);
2062 first += 1 + isl_local_space_offset(aff->ls, type);
2063 aff->v = isl_vec_insert_zero_els(aff->v, first, n);
2065 return isl_aff_free(aff);
2070 __isl_give isl_aff *isl_aff_add_dims(__isl_take isl_aff *aff,
2071 enum isl_dim_type type, unsigned n)
2075 pos = isl_aff_dim(aff, type);
2077 return isl_aff_insert_dims(aff, type, pos, n);
2080 __isl_give isl_pw_aff *isl_pw_aff_add_dims(__isl_take isl_pw_aff *pwaff,
2081 enum isl_dim_type type, unsigned n)
2085 pos = isl_pw_aff_dim(pwaff, type);
2087 return isl_pw_aff_insert_dims(pwaff, type, pos, n);
2090 __isl_give isl_pw_aff *isl_pw_aff_from_aff(__isl_take isl_aff *aff)
2092 isl_set *dom = isl_set_universe(isl_aff_get_domain_space(aff));
2093 return isl_pw_aff_alloc(dom, aff);
2097 #define PW isl_pw_aff
2101 #define EL_IS_ZERO is_empty
2105 #define IS_ZERO is_empty
2108 #undef DEFAULT_IS_ZERO
2109 #define DEFAULT_IS_ZERO 0
2113 #define NO_MOVE_DIMS
2117 #include <isl_pw_templ.c>
2119 static __isl_give isl_set *align_params_pw_pw_set_and(
2120 __isl_take isl_pw_aff *pwaff1, __isl_take isl_pw_aff *pwaff2,
2121 __isl_give isl_set *(*fn)(__isl_take isl_pw_aff *pwaff1,
2122 __isl_take isl_pw_aff *pwaff2))
2124 if (!pwaff1 || !pwaff2)
2126 if (isl_space_match(pwaff1->dim, isl_dim_param,
2127 pwaff2->dim, isl_dim_param))
2128 return fn(pwaff1, pwaff2);
2129 if (!isl_space_has_named_params(pwaff1->dim) ||
2130 !isl_space_has_named_params(pwaff2->dim))
2131 isl_die(isl_pw_aff_get_ctx(pwaff1), isl_error_invalid,
2132 "unaligned unnamed parameters", goto error);
2133 pwaff1 = isl_pw_aff_align_params(pwaff1, isl_pw_aff_get_space(pwaff2));
2134 pwaff2 = isl_pw_aff_align_params(pwaff2, isl_pw_aff_get_space(pwaff1));
2135 return fn(pwaff1, pwaff2);
2137 isl_pw_aff_free(pwaff1);
2138 isl_pw_aff_free(pwaff2);
2142 /* Compute a piecewise quasi-affine expression with a domain that
2143 * is the union of those of pwaff1 and pwaff2 and such that on each
2144 * cell, the quasi-affine expression is the better (according to cmp)
2145 * of those of pwaff1 and pwaff2. If only one of pwaff1 or pwaff2
2146 * is defined on a given cell, then the associated expression
2147 * is the defined one.
2149 static __isl_give isl_pw_aff *pw_aff_union_opt(__isl_take isl_pw_aff *pwaff1,
2150 __isl_take isl_pw_aff *pwaff2,
2151 __isl_give isl_basic_set *(*cmp)(__isl_take isl_aff *aff1,
2152 __isl_take isl_aff *aff2))
2159 if (!pwaff1 || !pwaff2)
2162 ctx = isl_space_get_ctx(pwaff1->dim);
2163 if (!isl_space_is_equal(pwaff1->dim, pwaff2->dim))
2164 isl_die(ctx, isl_error_invalid,
2165 "arguments should live in same space", goto error);
2167 if (isl_pw_aff_is_empty(pwaff1)) {
2168 isl_pw_aff_free(pwaff1);
2172 if (isl_pw_aff_is_empty(pwaff2)) {
2173 isl_pw_aff_free(pwaff2);
2177 n = 2 * (pwaff1->n + 1) * (pwaff2->n + 1);
2178 res = isl_pw_aff_alloc_size(isl_space_copy(pwaff1->dim), n);
2180 for (i = 0; i < pwaff1->n; ++i) {
2181 set = isl_set_copy(pwaff1->p[i].set);
2182 for (j = 0; j < pwaff2->n; ++j) {
2183 struct isl_set *common;
2186 common = isl_set_intersect(
2187 isl_set_copy(pwaff1->p[i].set),
2188 isl_set_copy(pwaff2->p[j].set));
2189 better = isl_set_from_basic_set(cmp(
2190 isl_aff_copy(pwaff2->p[j].aff),
2191 isl_aff_copy(pwaff1->p[i].aff)));
2192 better = isl_set_intersect(common, better);
2193 if (isl_set_plain_is_empty(better)) {
2194 isl_set_free(better);
2197 set = isl_set_subtract(set, isl_set_copy(better));
2199 res = isl_pw_aff_add_piece(res, better,
2200 isl_aff_copy(pwaff2->p[j].aff));
2202 res = isl_pw_aff_add_piece(res, set,
2203 isl_aff_copy(pwaff1->p[i].aff));
2206 for (j = 0; j < pwaff2->n; ++j) {
2207 set = isl_set_copy(pwaff2->p[j].set);
2208 for (i = 0; i < pwaff1->n; ++i)
2209 set = isl_set_subtract(set,
2210 isl_set_copy(pwaff1->p[i].set));
2211 res = isl_pw_aff_add_piece(res, set,
2212 isl_aff_copy(pwaff2->p[j].aff));
2215 isl_pw_aff_free(pwaff1);
2216 isl_pw_aff_free(pwaff2);
2220 isl_pw_aff_free(pwaff1);
2221 isl_pw_aff_free(pwaff2);
2225 /* Compute a piecewise quasi-affine expression with a domain that
2226 * is the union of those of pwaff1 and pwaff2 and such that on each
2227 * cell, the quasi-affine expression is the maximum of those of pwaff1
2228 * and pwaff2. If only one of pwaff1 or pwaff2 is defined on a given
2229 * cell, then the associated expression is the defined one.
2231 static __isl_give isl_pw_aff *pw_aff_union_max(__isl_take isl_pw_aff *pwaff1,
2232 __isl_take isl_pw_aff *pwaff2)
2234 return pw_aff_union_opt(pwaff1, pwaff2, &isl_aff_ge_basic_set);
2237 __isl_give isl_pw_aff *isl_pw_aff_union_max(__isl_take isl_pw_aff *pwaff1,
2238 __isl_take isl_pw_aff *pwaff2)
2240 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2,
2244 /* Compute a piecewise quasi-affine expression with a domain that
2245 * is the union of those of pwaff1 and pwaff2 and such that on each
2246 * cell, the quasi-affine expression is the minimum of those of pwaff1
2247 * and pwaff2. If only one of pwaff1 or pwaff2 is defined on a given
2248 * cell, then the associated expression is the defined one.
2250 static __isl_give isl_pw_aff *pw_aff_union_min(__isl_take isl_pw_aff *pwaff1,
2251 __isl_take isl_pw_aff *pwaff2)
2253 return pw_aff_union_opt(pwaff1, pwaff2, &isl_aff_le_basic_set);
2256 __isl_give isl_pw_aff *isl_pw_aff_union_min(__isl_take isl_pw_aff *pwaff1,
2257 __isl_take isl_pw_aff *pwaff2)
2259 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2,
2263 __isl_give isl_pw_aff *isl_pw_aff_union_opt(__isl_take isl_pw_aff *pwaff1,
2264 __isl_take isl_pw_aff *pwaff2, int max)
2267 return isl_pw_aff_union_max(pwaff1, pwaff2);
2269 return isl_pw_aff_union_min(pwaff1, pwaff2);
2272 /* Construct a map with as domain the domain of pwaff and
2273 * one-dimensional range corresponding to the affine expressions.
2275 static __isl_give isl_map *map_from_pw_aff(__isl_take isl_pw_aff *pwaff)
2284 dim = isl_pw_aff_get_space(pwaff);
2285 map = isl_map_empty(dim);
2287 for (i = 0; i < pwaff->n; ++i) {
2288 isl_basic_map *bmap;
2291 bmap = isl_basic_map_from_aff(isl_aff_copy(pwaff->p[i].aff));
2292 map_i = isl_map_from_basic_map(bmap);
2293 map_i = isl_map_intersect_domain(map_i,
2294 isl_set_copy(pwaff->p[i].set));
2295 map = isl_map_union_disjoint(map, map_i);
2298 isl_pw_aff_free(pwaff);
2303 /* Construct a map with as domain the domain of pwaff and
2304 * one-dimensional range corresponding to the affine expressions.
2306 __isl_give isl_map *isl_map_from_pw_aff(__isl_take isl_pw_aff *pwaff)
2310 if (isl_space_is_set(pwaff->dim))
2311 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
2312 "space of input is not a map",
2313 return isl_pw_aff_free(pwaff));
2314 return map_from_pw_aff(pwaff);
2317 /* Construct a one-dimensional set with as parameter domain
2318 * the domain of pwaff and the single set dimension
2319 * corresponding to the affine expressions.
2321 __isl_give isl_set *isl_set_from_pw_aff(__isl_take isl_pw_aff *pwaff)
2325 if (!isl_space_is_set(pwaff->dim))
2326 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
2327 "space of input is not a set",
2328 return isl_pw_aff_free(pwaff));
2329 return map_from_pw_aff(pwaff);
2332 /* Return a set containing those elements in the domain
2333 * of pwaff where it is non-negative.
2335 __isl_give isl_set *isl_pw_aff_nonneg_set(__isl_take isl_pw_aff *pwaff)
2343 set = isl_set_empty(isl_pw_aff_get_domain_space(pwaff));
2345 for (i = 0; i < pwaff->n; ++i) {
2346 isl_basic_set *bset;
2350 rational = isl_set_has_rational(pwaff->p[i].set);
2351 bset = aff_nonneg_basic_set(isl_aff_copy(pwaff->p[i].aff),
2353 set_i = isl_set_from_basic_set(bset);
2354 set_i = isl_set_intersect(set_i, isl_set_copy(pwaff->p[i].set));
2355 set = isl_set_union_disjoint(set, set_i);
2358 isl_pw_aff_free(pwaff);
2363 /* Return a set containing those elements in the domain
2364 * of pwaff where it is zero (if complement is 0) or not zero
2365 * (if complement is 1).
2367 static __isl_give isl_set *pw_aff_zero_set(__isl_take isl_pw_aff *pwaff,
2376 set = isl_set_empty(isl_pw_aff_get_domain_space(pwaff));
2378 for (i = 0; i < pwaff->n; ++i) {
2379 isl_basic_set *bset;
2380 isl_set *set_i, *zero;
2383 rational = isl_set_has_rational(pwaff->p[i].set);
2384 bset = aff_zero_basic_set(isl_aff_copy(pwaff->p[i].aff),
2386 zero = isl_set_from_basic_set(bset);
2387 set_i = isl_set_copy(pwaff->p[i].set);
2389 set_i = isl_set_subtract(set_i, zero);
2391 set_i = isl_set_intersect(set_i, zero);
2392 set = isl_set_union_disjoint(set, set_i);
2395 isl_pw_aff_free(pwaff);
2400 /* Return a set containing those elements in the domain
2401 * of pwaff where it is zero.
2403 __isl_give isl_set *isl_pw_aff_zero_set(__isl_take isl_pw_aff *pwaff)
2405 return pw_aff_zero_set(pwaff, 0);
2408 /* Return a set containing those elements in the domain
2409 * of pwaff where it is not zero.
2411 __isl_give isl_set *isl_pw_aff_non_zero_set(__isl_take isl_pw_aff *pwaff)
2413 return pw_aff_zero_set(pwaff, 1);
2416 /* Return a set containing those elements in the shared domain
2417 * of pwaff1 and pwaff2 where pwaff1 is greater than (or equal) to pwaff2.
2419 * We compute the difference on the shared domain and then construct
2420 * the set of values where this difference is non-negative.
2421 * If strict is set, we first subtract 1 from the difference.
2422 * If equal is set, we only return the elements where pwaff1 and pwaff2
2425 static __isl_give isl_set *pw_aff_gte_set(__isl_take isl_pw_aff *pwaff1,
2426 __isl_take isl_pw_aff *pwaff2, int strict, int equal)
2428 isl_set *set1, *set2;
2430 set1 = isl_pw_aff_domain(isl_pw_aff_copy(pwaff1));
2431 set2 = isl_pw_aff_domain(isl_pw_aff_copy(pwaff2));
2432 set1 = isl_set_intersect(set1, set2);
2433 pwaff1 = isl_pw_aff_intersect_domain(pwaff1, isl_set_copy(set1));
2434 pwaff2 = isl_pw_aff_intersect_domain(pwaff2, isl_set_copy(set1));
2435 pwaff1 = isl_pw_aff_add(pwaff1, isl_pw_aff_neg(pwaff2));
2438 isl_space *dim = isl_set_get_space(set1);
2440 aff = isl_aff_zero_on_domain(isl_local_space_from_space(dim));
2441 aff = isl_aff_add_constant_si(aff, -1);
2442 pwaff1 = isl_pw_aff_add(pwaff1, isl_pw_aff_alloc(set1, aff));
2447 return isl_pw_aff_zero_set(pwaff1);
2448 return isl_pw_aff_nonneg_set(pwaff1);
2451 /* Return a set containing those elements in the shared domain
2452 * of pwaff1 and pwaff2 where pwaff1 is equal to pwaff2.
2454 static __isl_give isl_set *pw_aff_eq_set(__isl_take isl_pw_aff *pwaff1,
2455 __isl_take isl_pw_aff *pwaff2)
2457 return pw_aff_gte_set(pwaff1, pwaff2, 0, 1);
2460 __isl_give isl_set *isl_pw_aff_eq_set(__isl_take isl_pw_aff *pwaff1,
2461 __isl_take isl_pw_aff *pwaff2)
2463 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_eq_set);
2466 /* Return a set containing those elements in the shared domain
2467 * of pwaff1 and pwaff2 where pwaff1 is greater than or equal to pwaff2.
2469 static __isl_give isl_set *pw_aff_ge_set(__isl_take isl_pw_aff *pwaff1,
2470 __isl_take isl_pw_aff *pwaff2)
2472 return pw_aff_gte_set(pwaff1, pwaff2, 0, 0);
2475 __isl_give isl_set *isl_pw_aff_ge_set(__isl_take isl_pw_aff *pwaff1,
2476 __isl_take isl_pw_aff *pwaff2)
2478 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_ge_set);
2481 /* Return a set containing those elements in the shared domain
2482 * of pwaff1 and pwaff2 where pwaff1 is strictly greater than pwaff2.
2484 static __isl_give isl_set *pw_aff_gt_set(__isl_take isl_pw_aff *pwaff1,
2485 __isl_take isl_pw_aff *pwaff2)
2487 return pw_aff_gte_set(pwaff1, pwaff2, 1, 0);
2490 __isl_give isl_set *isl_pw_aff_gt_set(__isl_take isl_pw_aff *pwaff1,
2491 __isl_take isl_pw_aff *pwaff2)
2493 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_gt_set);
2496 __isl_give isl_set *isl_pw_aff_le_set(__isl_take isl_pw_aff *pwaff1,
2497 __isl_take isl_pw_aff *pwaff2)
2499 return isl_pw_aff_ge_set(pwaff2, pwaff1);
2502 __isl_give isl_set *isl_pw_aff_lt_set(__isl_take isl_pw_aff *pwaff1,
2503 __isl_take isl_pw_aff *pwaff2)
2505 return isl_pw_aff_gt_set(pwaff2, pwaff1);
2508 /* Return a set containing those elements in the shared domain
2509 * of the elements of list1 and list2 where each element in list1
2510 * has the relation specified by "fn" with each element in list2.
2512 static __isl_give isl_set *pw_aff_list_set(__isl_take isl_pw_aff_list *list1,
2513 __isl_take isl_pw_aff_list *list2,
2514 __isl_give isl_set *(*fn)(__isl_take isl_pw_aff *pwaff1,
2515 __isl_take isl_pw_aff *pwaff2))
2521 if (!list1 || !list2)
2524 ctx = isl_pw_aff_list_get_ctx(list1);
2525 if (list1->n < 1 || list2->n < 1)
2526 isl_die(ctx, isl_error_invalid,
2527 "list should contain at least one element", goto error);
2529 set = isl_set_universe(isl_pw_aff_get_domain_space(list1->p[0]));
2530 for (i = 0; i < list1->n; ++i)
2531 for (j = 0; j < list2->n; ++j) {
2534 set_ij = fn(isl_pw_aff_copy(list1->p[i]),
2535 isl_pw_aff_copy(list2->p[j]));
2536 set = isl_set_intersect(set, set_ij);
2539 isl_pw_aff_list_free(list1);
2540 isl_pw_aff_list_free(list2);
2543 isl_pw_aff_list_free(list1);
2544 isl_pw_aff_list_free(list2);
2548 /* Return a set containing those elements in the shared domain
2549 * of the elements of list1 and list2 where each element in list1
2550 * is equal to each element in list2.
2552 __isl_give isl_set *isl_pw_aff_list_eq_set(__isl_take isl_pw_aff_list *list1,
2553 __isl_take isl_pw_aff_list *list2)
2555 return pw_aff_list_set(list1, list2, &isl_pw_aff_eq_set);
2558 __isl_give isl_set *isl_pw_aff_list_ne_set(__isl_take isl_pw_aff_list *list1,
2559 __isl_take isl_pw_aff_list *list2)
2561 return pw_aff_list_set(list1, list2, &isl_pw_aff_ne_set);
2564 /* Return a set containing those elements in the shared domain
2565 * of the elements of list1 and list2 where each element in list1
2566 * is less than or equal to each element in list2.
2568 __isl_give isl_set *isl_pw_aff_list_le_set(__isl_take isl_pw_aff_list *list1,
2569 __isl_take isl_pw_aff_list *list2)
2571 return pw_aff_list_set(list1, list2, &isl_pw_aff_le_set);
2574 __isl_give isl_set *isl_pw_aff_list_lt_set(__isl_take isl_pw_aff_list *list1,
2575 __isl_take isl_pw_aff_list *list2)
2577 return pw_aff_list_set(list1, list2, &isl_pw_aff_lt_set);
2580 __isl_give isl_set *isl_pw_aff_list_ge_set(__isl_take isl_pw_aff_list *list1,
2581 __isl_take isl_pw_aff_list *list2)
2583 return pw_aff_list_set(list1, list2, &isl_pw_aff_ge_set);
2586 __isl_give isl_set *isl_pw_aff_list_gt_set(__isl_take isl_pw_aff_list *list1,
2587 __isl_take isl_pw_aff_list *list2)
2589 return pw_aff_list_set(list1, list2, &isl_pw_aff_gt_set);
2593 /* Return a set containing those elements in the shared domain
2594 * of pwaff1 and pwaff2 where pwaff1 is not equal to pwaff2.
2596 static __isl_give isl_set *pw_aff_ne_set(__isl_take isl_pw_aff *pwaff1,
2597 __isl_take isl_pw_aff *pwaff2)
2599 isl_set *set_lt, *set_gt;
2601 set_lt = isl_pw_aff_lt_set(isl_pw_aff_copy(pwaff1),
2602 isl_pw_aff_copy(pwaff2));
2603 set_gt = isl_pw_aff_gt_set(pwaff1, pwaff2);
2604 return isl_set_union_disjoint(set_lt, set_gt);
2607 __isl_give isl_set *isl_pw_aff_ne_set(__isl_take isl_pw_aff *pwaff1,
2608 __isl_take isl_pw_aff *pwaff2)
2610 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_ne_set);
2613 __isl_give isl_pw_aff *isl_pw_aff_scale_down(__isl_take isl_pw_aff *pwaff,
2618 if (isl_int_is_one(v))
2620 if (!isl_int_is_pos(v))
2621 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
2622 "factor needs to be positive",
2623 return isl_pw_aff_free(pwaff));
2624 pwaff = isl_pw_aff_cow(pwaff);
2630 for (i = 0; i < pwaff->n; ++i) {
2631 pwaff->p[i].aff = isl_aff_scale_down(pwaff->p[i].aff, v);
2632 if (!pwaff->p[i].aff)
2633 return isl_pw_aff_free(pwaff);
2639 /* Divide "pa" by "f".
2641 __isl_give isl_pw_aff *isl_pw_aff_scale_down_val(__isl_take isl_pw_aff *pa,
2642 __isl_take isl_val *f)
2649 if (isl_val_is_one(f)) {
2654 if (!isl_val_is_rat(f))
2655 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
2656 "expecting rational factor", goto error);
2657 if (!isl_val_is_pos(f))
2658 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
2659 "factor needs to be positive", goto error);
2661 pa = isl_pw_aff_cow(pa);
2667 for (i = 0; i < pa->n; ++i) {
2668 pa->p[i].aff = isl_aff_scale_down_val(pa->p[i].aff,
2677 isl_pw_aff_free(pa);
2682 __isl_give isl_pw_aff *isl_pw_aff_floor(__isl_take isl_pw_aff *pwaff)
2686 pwaff = isl_pw_aff_cow(pwaff);
2692 for (i = 0; i < pwaff->n; ++i) {
2693 pwaff->p[i].aff = isl_aff_floor(pwaff->p[i].aff);
2694 if (!pwaff->p[i].aff)
2695 return isl_pw_aff_free(pwaff);
2701 __isl_give isl_pw_aff *isl_pw_aff_ceil(__isl_take isl_pw_aff *pwaff)
2705 pwaff = isl_pw_aff_cow(pwaff);
2711 for (i = 0; i < pwaff->n; ++i) {
2712 pwaff->p[i].aff = isl_aff_ceil(pwaff->p[i].aff);
2713 if (!pwaff->p[i].aff)
2714 return isl_pw_aff_free(pwaff);
2720 /* Assuming that "cond1" and "cond2" are disjoint,
2721 * return an affine expression that is equal to pwaff1 on cond1
2722 * and to pwaff2 on cond2.
2724 static __isl_give isl_pw_aff *isl_pw_aff_select(
2725 __isl_take isl_set *cond1, __isl_take isl_pw_aff *pwaff1,
2726 __isl_take isl_set *cond2, __isl_take isl_pw_aff *pwaff2)
2728 pwaff1 = isl_pw_aff_intersect_domain(pwaff1, cond1);
2729 pwaff2 = isl_pw_aff_intersect_domain(pwaff2, cond2);
2731 return isl_pw_aff_add_disjoint(pwaff1, pwaff2);
2734 /* Return an affine expression that is equal to pwaff_true for elements
2735 * where "cond" is non-zero and to pwaff_false for elements where "cond"
2737 * That is, return cond ? pwaff_true : pwaff_false;
2739 __isl_give isl_pw_aff *isl_pw_aff_cond(__isl_take isl_pw_aff *cond,
2740 __isl_take isl_pw_aff *pwaff_true, __isl_take isl_pw_aff *pwaff_false)
2742 isl_set *cond_true, *cond_false;
2744 cond_true = isl_pw_aff_non_zero_set(isl_pw_aff_copy(cond));
2745 cond_false = isl_pw_aff_zero_set(cond);
2746 return isl_pw_aff_select(cond_true, pwaff_true,
2747 cond_false, pwaff_false);
2750 int isl_aff_is_cst(__isl_keep isl_aff *aff)
2755 return isl_seq_first_non_zero(aff->v->el + 2, aff->v->size - 2) == -1;
2758 /* Check whether pwaff is a piecewise constant.
2760 int isl_pw_aff_is_cst(__isl_keep isl_pw_aff *pwaff)
2767 for (i = 0; i < pwaff->n; ++i) {
2768 int is_cst = isl_aff_is_cst(pwaff->p[i].aff);
2769 if (is_cst < 0 || !is_cst)
2776 __isl_give isl_aff *isl_aff_mul(__isl_take isl_aff *aff1,
2777 __isl_take isl_aff *aff2)
2779 if (!isl_aff_is_cst(aff2) && isl_aff_is_cst(aff1))
2780 return isl_aff_mul(aff2, aff1);
2782 if (!isl_aff_is_cst(aff2))
2783 isl_die(isl_aff_get_ctx(aff1), isl_error_invalid,
2784 "at least one affine expression should be constant",
2787 aff1 = isl_aff_cow(aff1);
2791 aff1 = isl_aff_scale(aff1, aff2->v->el[1]);
2792 aff1 = isl_aff_scale_down(aff1, aff2->v->el[0]);
2802 /* Divide "aff1" by "aff2", assuming "aff2" is a piecewise constant.
2804 __isl_give isl_aff *isl_aff_div(__isl_take isl_aff *aff1,
2805 __isl_take isl_aff *aff2)
2810 is_cst = isl_aff_is_cst(aff2);
2814 isl_die(isl_aff_get_ctx(aff2), isl_error_invalid,
2815 "second argument should be a constant", goto error);
2820 neg = isl_int_is_neg(aff2->v->el[1]);
2822 isl_int_neg(aff2->v->el[0], aff2->v->el[0]);
2823 isl_int_neg(aff2->v->el[1], aff2->v->el[1]);
2826 aff1 = isl_aff_scale(aff1, aff2->v->el[0]);
2827 aff1 = isl_aff_scale_down(aff1, aff2->v->el[1]);
2830 isl_int_neg(aff2->v->el[0], aff2->v->el[0]);
2831 isl_int_neg(aff2->v->el[1], aff2->v->el[1]);
2842 static __isl_give isl_pw_aff *pw_aff_add(__isl_take isl_pw_aff *pwaff1,
2843 __isl_take isl_pw_aff *pwaff2)
2845 return isl_pw_aff_on_shared_domain(pwaff1, pwaff2, &isl_aff_add);
2848 __isl_give isl_pw_aff *isl_pw_aff_add(__isl_take isl_pw_aff *pwaff1,
2849 __isl_take isl_pw_aff *pwaff2)
2851 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_add);
2854 __isl_give isl_pw_aff *isl_pw_aff_union_add(__isl_take isl_pw_aff *pwaff1,
2855 __isl_take isl_pw_aff *pwaff2)
2857 return isl_pw_aff_union_add_(pwaff1, pwaff2);
2860 static __isl_give isl_pw_aff *pw_aff_mul(__isl_take isl_pw_aff *pwaff1,
2861 __isl_take isl_pw_aff *pwaff2)
2863 return isl_pw_aff_on_shared_domain(pwaff1, pwaff2, &isl_aff_mul);
2866 __isl_give isl_pw_aff *isl_pw_aff_mul(__isl_take isl_pw_aff *pwaff1,
2867 __isl_take isl_pw_aff *pwaff2)
2869 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_mul);
2872 static __isl_give isl_pw_aff *pw_aff_div(__isl_take isl_pw_aff *pa1,
2873 __isl_take isl_pw_aff *pa2)
2875 return isl_pw_aff_on_shared_domain(pa1, pa2, &isl_aff_div);
2878 /* Divide "pa1" by "pa2", assuming "pa2" is a piecewise constant.
2880 __isl_give isl_pw_aff *isl_pw_aff_div(__isl_take isl_pw_aff *pa1,
2881 __isl_take isl_pw_aff *pa2)
2885 is_cst = isl_pw_aff_is_cst(pa2);
2889 isl_die(isl_pw_aff_get_ctx(pa2), isl_error_invalid,
2890 "second argument should be a piecewise constant",
2892 return isl_pw_aff_align_params_pw_pw_and(pa1, pa2, &pw_aff_div);
2894 isl_pw_aff_free(pa1);
2895 isl_pw_aff_free(pa2);
2899 /* Compute the quotient of the integer division of "pa1" by "pa2"
2900 * with rounding towards zero.
2901 * "pa2" is assumed to be a piecewise constant.
2903 * In particular, return
2905 * pa1 >= 0 ? floor(pa1/pa2) : ceil(pa1/pa2)
2908 __isl_give isl_pw_aff *isl_pw_aff_tdiv_q(__isl_take isl_pw_aff *pa1,
2909 __isl_take isl_pw_aff *pa2)
2915 is_cst = isl_pw_aff_is_cst(pa2);
2919 isl_die(isl_pw_aff_get_ctx(pa2), isl_error_invalid,
2920 "second argument should be a piecewise constant",
2923 pa1 = isl_pw_aff_div(pa1, pa2);
2925 cond = isl_pw_aff_nonneg_set(isl_pw_aff_copy(pa1));
2926 f = isl_pw_aff_floor(isl_pw_aff_copy(pa1));
2927 c = isl_pw_aff_ceil(pa1);
2928 return isl_pw_aff_cond(isl_set_indicator_function(cond), f, c);
2930 isl_pw_aff_free(pa1);
2931 isl_pw_aff_free(pa2);
2935 /* Compute the remainder of the integer division of "pa1" by "pa2"
2936 * with rounding towards zero.
2937 * "pa2" is assumed to be a piecewise constant.
2939 * In particular, return
2941 * pa1 - pa2 * (pa1 >= 0 ? floor(pa1/pa2) : ceil(pa1/pa2))
2944 __isl_give isl_pw_aff *isl_pw_aff_tdiv_r(__isl_take isl_pw_aff *pa1,
2945 __isl_take isl_pw_aff *pa2)
2950 is_cst = isl_pw_aff_is_cst(pa2);
2954 isl_die(isl_pw_aff_get_ctx(pa2), isl_error_invalid,
2955 "second argument should be a piecewise constant",
2957 res = isl_pw_aff_tdiv_q(isl_pw_aff_copy(pa1), isl_pw_aff_copy(pa2));
2958 res = isl_pw_aff_mul(pa2, res);
2959 res = isl_pw_aff_sub(pa1, res);
2962 isl_pw_aff_free(pa1);
2963 isl_pw_aff_free(pa2);
2967 static __isl_give isl_pw_aff *pw_aff_min(__isl_take isl_pw_aff *pwaff1,
2968 __isl_take isl_pw_aff *pwaff2)
2973 dom = isl_set_intersect(isl_pw_aff_domain(isl_pw_aff_copy(pwaff1)),
2974 isl_pw_aff_domain(isl_pw_aff_copy(pwaff2)));
2975 le = isl_pw_aff_le_set(isl_pw_aff_copy(pwaff1),
2976 isl_pw_aff_copy(pwaff2));
2977 dom = isl_set_subtract(dom, isl_set_copy(le));
2978 return isl_pw_aff_select(le, pwaff1, dom, pwaff2);
2981 __isl_give isl_pw_aff *isl_pw_aff_min(__isl_take isl_pw_aff *pwaff1,
2982 __isl_take isl_pw_aff *pwaff2)
2984 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_min);
2987 static __isl_give isl_pw_aff *pw_aff_max(__isl_take isl_pw_aff *pwaff1,
2988 __isl_take isl_pw_aff *pwaff2)
2993 dom = isl_set_intersect(isl_pw_aff_domain(isl_pw_aff_copy(pwaff1)),
2994 isl_pw_aff_domain(isl_pw_aff_copy(pwaff2)));
2995 ge = isl_pw_aff_ge_set(isl_pw_aff_copy(pwaff1),
2996 isl_pw_aff_copy(pwaff2));
2997 dom = isl_set_subtract(dom, isl_set_copy(ge));
2998 return isl_pw_aff_select(ge, pwaff1, dom, pwaff2);
3001 __isl_give isl_pw_aff *isl_pw_aff_max(__isl_take isl_pw_aff *pwaff1,
3002 __isl_take isl_pw_aff *pwaff2)
3004 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_max);
3007 static __isl_give isl_pw_aff *pw_aff_list_reduce(
3008 __isl_take isl_pw_aff_list *list,
3009 __isl_give isl_pw_aff *(*fn)(__isl_take isl_pw_aff *pwaff1,
3010 __isl_take isl_pw_aff *pwaff2))
3019 ctx = isl_pw_aff_list_get_ctx(list);
3021 isl_die(ctx, isl_error_invalid,
3022 "list should contain at least one element",
3023 return isl_pw_aff_list_free(list));
3025 res = isl_pw_aff_copy(list->p[0]);
3026 for (i = 1; i < list->n; ++i)
3027 res = fn(res, isl_pw_aff_copy(list->p[i]));
3029 isl_pw_aff_list_free(list);
3033 /* Return an isl_pw_aff that maps each element in the intersection of the
3034 * domains of the elements of list to the minimal corresponding affine
3037 __isl_give isl_pw_aff *isl_pw_aff_list_min(__isl_take isl_pw_aff_list *list)
3039 return pw_aff_list_reduce(list, &isl_pw_aff_min);
3042 /* Return an isl_pw_aff that maps each element in the intersection of the
3043 * domains of the elements of list to the maximal corresponding affine
3046 __isl_give isl_pw_aff *isl_pw_aff_list_max(__isl_take isl_pw_aff_list *list)
3048 return pw_aff_list_reduce(list, &isl_pw_aff_max);
3051 /* Mark the domains of "pwaff" as rational.
3053 __isl_give isl_pw_aff *isl_pw_aff_set_rational(__isl_take isl_pw_aff *pwaff)
3057 pwaff = isl_pw_aff_cow(pwaff);
3063 for (i = 0; i < pwaff->n; ++i) {
3064 pwaff->p[i].set = isl_set_set_rational(pwaff->p[i].set);
3065 if (!pwaff->p[i].set)
3066 return isl_pw_aff_free(pwaff);
3072 /* Mark the domains of the elements of "list" as rational.
3074 __isl_give isl_pw_aff_list *isl_pw_aff_list_set_rational(
3075 __isl_take isl_pw_aff_list *list)
3085 for (i = 0; i < n; ++i) {
3088 pa = isl_pw_aff_list_get_pw_aff(list, i);
3089 pa = isl_pw_aff_set_rational(pa);
3090 list = isl_pw_aff_list_set_pw_aff(list, i, pa);
3096 /* Check that the domain space of "aff" matches "space".
3098 * Return 0 on success and -1 on error.
3100 int isl_aff_check_match_domain_space(__isl_keep isl_aff *aff,
3101 __isl_keep isl_space *space)
3103 isl_space *aff_space;
3109 aff_space = isl_aff_get_domain_space(aff);
3111 match = isl_space_match(space, isl_dim_param, aff_space, isl_dim_param);
3115 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
3116 "parameters don't match", goto error);
3117 match = isl_space_tuple_match(space, isl_dim_in,
3118 aff_space, isl_dim_set);
3122 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
3123 "domains don't match", goto error);
3124 isl_space_free(aff_space);
3127 isl_space_free(aff_space);
3134 #include <isl_multi_templ.c>
3136 /* Create an isl_pw_multi_aff with the given isl_multi_aff on a universe
3139 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_multi_aff(
3140 __isl_take isl_multi_aff *ma)
3142 isl_set *dom = isl_set_universe(isl_multi_aff_get_domain_space(ma));
3143 return isl_pw_multi_aff_alloc(dom, ma);
3146 /* Create a piecewise multi-affine expression in the given space that maps each
3147 * input dimension to the corresponding output dimension.
3149 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_identity(
3150 __isl_take isl_space *space)
3152 return isl_pw_multi_aff_from_multi_aff(isl_multi_aff_identity(space));
3155 __isl_give isl_multi_aff *isl_multi_aff_add(__isl_take isl_multi_aff *maff1,
3156 __isl_take isl_multi_aff *maff2)
3158 return isl_multi_aff_bin_op(maff1, maff2, &isl_aff_add);
3161 /* Subtract "ma2" from "ma1" and return the result.
3163 __isl_give isl_multi_aff *isl_multi_aff_sub(__isl_take isl_multi_aff *ma1,
3164 __isl_take isl_multi_aff *ma2)
3166 return isl_multi_aff_bin_op(ma1, ma2, &isl_aff_sub);
3169 /* Given two multi-affine expressions A -> B and C -> D,
3170 * construct a multi-affine expression [A -> C] -> [B -> D].
3172 __isl_give isl_multi_aff *isl_multi_aff_product(
3173 __isl_take isl_multi_aff *ma1, __isl_take isl_multi_aff *ma2)
3179 int in1, in2, out1, out2;
3181 in1 = isl_multi_aff_dim(ma1, isl_dim_in);
3182 in2 = isl_multi_aff_dim(ma2, isl_dim_in);
3183 out1 = isl_multi_aff_dim(ma1, isl_dim_out);
3184 out2 = isl_multi_aff_dim(ma2, isl_dim_out);
3185 space = isl_space_product(isl_multi_aff_get_space(ma1),
3186 isl_multi_aff_get_space(ma2));
3187 res = isl_multi_aff_alloc(isl_space_copy(space));
3188 space = isl_space_domain(space);
3190 for (i = 0; i < out1; ++i) {
3191 aff = isl_multi_aff_get_aff(ma1, i);
3192 aff = isl_aff_insert_dims(aff, isl_dim_in, in1, in2);
3193 aff = isl_aff_reset_domain_space(aff, isl_space_copy(space));
3194 res = isl_multi_aff_set_aff(res, i, aff);
3197 for (i = 0; i < out2; ++i) {
3198 aff = isl_multi_aff_get_aff(ma2, i);
3199 aff = isl_aff_insert_dims(aff, isl_dim_in, 0, in1);
3200 aff = isl_aff_reset_domain_space(aff, isl_space_copy(space));
3201 res = isl_multi_aff_set_aff(res, out1 + i, aff);
3204 isl_space_free(space);
3205 isl_multi_aff_free(ma1);
3206 isl_multi_aff_free(ma2);
3210 /* Exploit the equalities in "eq" to simplify the affine expressions.
3212 static __isl_give isl_multi_aff *isl_multi_aff_substitute_equalities(
3213 __isl_take isl_multi_aff *maff, __isl_take isl_basic_set *eq)
3217 maff = isl_multi_aff_cow(maff);
3221 for (i = 0; i < maff->n; ++i) {
3222 maff->p[i] = isl_aff_substitute_equalities(maff->p[i],
3223 isl_basic_set_copy(eq));
3228 isl_basic_set_free(eq);
3231 isl_basic_set_free(eq);
3232 isl_multi_aff_free(maff);
3236 __isl_give isl_multi_aff *isl_multi_aff_scale(__isl_take isl_multi_aff *maff,
3241 maff = isl_multi_aff_cow(maff);
3245 for (i = 0; i < maff->n; ++i) {
3246 maff->p[i] = isl_aff_scale(maff->p[i], f);
3248 return isl_multi_aff_free(maff);
3254 __isl_give isl_multi_aff *isl_multi_aff_add_on_domain(__isl_keep isl_set *dom,
3255 __isl_take isl_multi_aff *maff1, __isl_take isl_multi_aff *maff2)
3257 maff1 = isl_multi_aff_add(maff1, maff2);
3258 maff1 = isl_multi_aff_gist(maff1, isl_set_copy(dom));
3262 int isl_multi_aff_is_empty(__isl_keep isl_multi_aff *maff)
3270 int isl_multi_aff_plain_is_equal(__isl_keep isl_multi_aff *maff1,
3271 __isl_keep isl_multi_aff *maff2)
3276 if (!maff1 || !maff2)
3278 if (maff1->n != maff2->n)
3280 equal = isl_space_is_equal(maff1->space, maff2->space);
3281 if (equal < 0 || !equal)
3284 for (i = 0; i < maff1->n; ++i) {
3285 equal = isl_aff_plain_is_equal(maff1->p[i], maff2->p[i]);
3286 if (equal < 0 || !equal)
3293 /* Return the set of domain elements where "ma1" is lexicographically
3294 * smaller than or equal to "ma2".
3296 __isl_give isl_set *isl_multi_aff_lex_le_set(__isl_take isl_multi_aff *ma1,
3297 __isl_take isl_multi_aff *ma2)
3299 return isl_multi_aff_lex_ge_set(ma2, ma1);
3302 /* Return the set of domain elements where "ma1" is lexicographically
3303 * greater than or equal to "ma2".
3305 __isl_give isl_set *isl_multi_aff_lex_ge_set(__isl_take isl_multi_aff *ma1,
3306 __isl_take isl_multi_aff *ma2)
3309 isl_map *map1, *map2;
3312 map1 = isl_map_from_multi_aff(ma1);
3313 map2 = isl_map_from_multi_aff(ma2);
3314 map = isl_map_range_product(map1, map2);
3315 space = isl_space_range(isl_map_get_space(map));
3316 space = isl_space_domain(isl_space_unwrap(space));
3317 ge = isl_map_lex_ge(space);
3318 map = isl_map_intersect_range(map, isl_map_wrap(ge));
3320 return isl_map_domain(map);
3324 #define PW isl_pw_multi_aff
3326 #define EL isl_multi_aff
3328 #define EL_IS_ZERO is_empty
3332 #define IS_ZERO is_empty
3335 #undef DEFAULT_IS_ZERO
3336 #define DEFAULT_IS_ZERO 0
3341 #define NO_INVOLVES_DIMS
3342 #define NO_MOVE_DIMS
3343 #define NO_INSERT_DIMS
3347 #include <isl_pw_templ.c>
3350 #define UNION isl_union_pw_multi_aff
3352 #define PART isl_pw_multi_aff
3354 #define PARTS pw_multi_aff
3355 #define ALIGN_DOMAIN
3359 #include <isl_union_templ.c>
3361 /* Given a function "cmp" that returns the set of elements where
3362 * "ma1" is "better" than "ma2", return the intersection of this
3363 * set with "dom1" and "dom2".
3365 static __isl_give isl_set *shared_and_better(__isl_keep isl_set *dom1,
3366 __isl_keep isl_set *dom2, __isl_keep isl_multi_aff *ma1,
3367 __isl_keep isl_multi_aff *ma2,
3368 __isl_give isl_set *(*cmp)(__isl_take isl_multi_aff *ma1,
3369 __isl_take isl_multi_aff *ma2))
3375 common = isl_set_intersect(isl_set_copy(dom1), isl_set_copy(dom2));
3376 is_empty = isl_set_plain_is_empty(common);
3377 if (is_empty >= 0 && is_empty)
3380 return isl_set_free(common);
3381 better = cmp(isl_multi_aff_copy(ma1), isl_multi_aff_copy(ma2));
3382 better = isl_set_intersect(common, better);
3387 /* Given a function "cmp" that returns the set of elements where
3388 * "ma1" is "better" than "ma2", return a piecewise multi affine
3389 * expression defined on the union of the definition domains
3390 * of "pma1" and "pma2" that maps to the "best" of "pma1" and
3391 * "pma2" on each cell. If only one of the two input functions
3392 * is defined on a given cell, then it is considered the best.
3394 static __isl_give isl_pw_multi_aff *pw_multi_aff_union_opt(
3395 __isl_take isl_pw_multi_aff *pma1,
3396 __isl_take isl_pw_multi_aff *pma2,
3397 __isl_give isl_set *(*cmp)(__isl_take isl_multi_aff *ma1,
3398 __isl_take isl_multi_aff *ma2))
3401 isl_pw_multi_aff *res = NULL;
3403 isl_set *set = NULL;
3408 ctx = isl_space_get_ctx(pma1->dim);
3409 if (!isl_space_is_equal(pma1->dim, pma2->dim))
3410 isl_die(ctx, isl_error_invalid,
3411 "arguments should live in the same space", goto error);
3413 if (isl_pw_multi_aff_is_empty(pma1)) {
3414 isl_pw_multi_aff_free(pma1);
3418 if (isl_pw_multi_aff_is_empty(pma2)) {
3419 isl_pw_multi_aff_free(pma2);
3423 n = 2 * (pma1->n + 1) * (pma2->n + 1);
3424 res = isl_pw_multi_aff_alloc_size(isl_space_copy(pma1->dim), n);
3426 for (i = 0; i < pma1->n; ++i) {
3427 set = isl_set_copy(pma1->p[i].set);
3428 for (j = 0; j < pma2->n; ++j) {
3432 better = shared_and_better(pma2->p[j].set,
3433 pma1->p[i].set, pma2->p[j].maff,
3434 pma1->p[i].maff, cmp);
3435 is_empty = isl_set_plain_is_empty(better);
3436 if (is_empty < 0 || is_empty) {
3437 isl_set_free(better);
3442 set = isl_set_subtract(set, isl_set_copy(better));
3444 res = isl_pw_multi_aff_add_piece(res, better,
3445 isl_multi_aff_copy(pma2->p[j].maff));
3447 res = isl_pw_multi_aff_add_piece(res, set,
3448 isl_multi_aff_copy(pma1->p[i].maff));
3451 for (j = 0; j < pma2->n; ++j) {
3452 set = isl_set_copy(pma2->p[j].set);
3453 for (i = 0; i < pma1->n; ++i)
3454 set = isl_set_subtract(set,
3455 isl_set_copy(pma1->p[i].set));
3456 res = isl_pw_multi_aff_add_piece(res, set,
3457 isl_multi_aff_copy(pma2->p[j].maff));
3460 isl_pw_multi_aff_free(pma1);
3461 isl_pw_multi_aff_free(pma2);
3465 isl_pw_multi_aff_free(pma1);
3466 isl_pw_multi_aff_free(pma2);
3468 return isl_pw_multi_aff_free(res);
3471 static __isl_give isl_pw_multi_aff *pw_multi_aff_union_lexmax(
3472 __isl_take isl_pw_multi_aff *pma1,
3473 __isl_take isl_pw_multi_aff *pma2)
3475 return pw_multi_aff_union_opt(pma1, pma2, &isl_multi_aff_lex_ge_set);
3478 /* Given two piecewise multi affine expressions, return a piecewise
3479 * multi-affine expression defined on the union of the definition domains
3480 * of the inputs that is equal to the lexicographic maximum of the two
3481 * inputs on each cell. If only one of the two inputs is defined on
3482 * a given cell, then it is considered to be the maximum.
3484 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_union_lexmax(
3485 __isl_take isl_pw_multi_aff *pma1,
3486 __isl_take isl_pw_multi_aff *pma2)
3488 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
3489 &pw_multi_aff_union_lexmax);
3492 static __isl_give isl_pw_multi_aff *pw_multi_aff_union_lexmin(
3493 __isl_take isl_pw_multi_aff *pma1,
3494 __isl_take isl_pw_multi_aff *pma2)
3496 return pw_multi_aff_union_opt(pma1, pma2, &isl_multi_aff_lex_le_set);
3499 /* Given two piecewise multi affine expressions, return a piecewise
3500 * multi-affine expression defined on the union of the definition domains
3501 * of the inputs that is equal to the lexicographic minimum of the two
3502 * inputs on each cell. If only one of the two inputs is defined on
3503 * a given cell, then it is considered to be the minimum.
3505 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_union_lexmin(
3506 __isl_take isl_pw_multi_aff *pma1,
3507 __isl_take isl_pw_multi_aff *pma2)
3509 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
3510 &pw_multi_aff_union_lexmin);
3513 static __isl_give isl_pw_multi_aff *pw_multi_aff_add(
3514 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3516 return isl_pw_multi_aff_on_shared_domain(pma1, pma2,
3517 &isl_multi_aff_add);
3520 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_add(
3521 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3523 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
3527 static __isl_give isl_pw_multi_aff *pw_multi_aff_sub(
3528 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3530 return isl_pw_multi_aff_on_shared_domain(pma1, pma2,
3531 &isl_multi_aff_sub);
3534 /* Subtract "pma2" from "pma1" and return the result.
3536 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_sub(
3537 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3539 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
3543 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_union_add(
3544 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3546 return isl_pw_multi_aff_union_add_(pma1, pma2);
3549 /* Given two piecewise multi-affine expressions A -> B and C -> D,
3550 * construct a piecewise multi-affine expression [A -> C] -> [B -> D].
3552 static __isl_give isl_pw_multi_aff *pw_multi_aff_product(
3553 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3557 isl_pw_multi_aff *res;
3562 n = pma1->n * pma2->n;
3563 space = isl_space_product(isl_space_copy(pma1->dim),
3564 isl_space_copy(pma2->dim));
3565 res = isl_pw_multi_aff_alloc_size(space, n);
3567 for (i = 0; i < pma1->n; ++i) {
3568 for (j = 0; j < pma2->n; ++j) {
3572 domain = isl_set_product(isl_set_copy(pma1->p[i].set),
3573 isl_set_copy(pma2->p[j].set));
3574 ma = isl_multi_aff_product(
3575 isl_multi_aff_copy(pma1->p[i].maff),
3576 isl_multi_aff_copy(pma2->p[i].maff));
3577 res = isl_pw_multi_aff_add_piece(res, domain, ma);
3581 isl_pw_multi_aff_free(pma1);
3582 isl_pw_multi_aff_free(pma2);
3585 isl_pw_multi_aff_free(pma1);
3586 isl_pw_multi_aff_free(pma2);
3590 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_product(
3591 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3593 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
3594 &pw_multi_aff_product);
3597 /* Construct a map mapping the domain of the piecewise multi-affine expression
3598 * to its range, with each dimension in the range equated to the
3599 * corresponding affine expression on its cell.
3601 __isl_give isl_map *isl_map_from_pw_multi_aff(__isl_take isl_pw_multi_aff *pma)
3609 map = isl_map_empty(isl_pw_multi_aff_get_space(pma));
3611 for (i = 0; i < pma->n; ++i) {
3612 isl_multi_aff *maff;
3613 isl_basic_map *bmap;
3616 maff = isl_multi_aff_copy(pma->p[i].maff);
3617 bmap = isl_basic_map_from_multi_aff(maff);
3618 map_i = isl_map_from_basic_map(bmap);
3619 map_i = isl_map_intersect_domain(map_i,
3620 isl_set_copy(pma->p[i].set));
3621 map = isl_map_union_disjoint(map, map_i);
3624 isl_pw_multi_aff_free(pma);
3628 __isl_give isl_set *isl_set_from_pw_multi_aff(__isl_take isl_pw_multi_aff *pma)
3633 if (!isl_space_is_set(pma->dim))
3634 isl_die(isl_pw_multi_aff_get_ctx(pma), isl_error_invalid,
3635 "isl_pw_multi_aff cannot be converted into an isl_set",
3636 return isl_pw_multi_aff_free(pma));
3638 return isl_map_from_pw_multi_aff(pma);
3641 /* Given a basic map with a single output dimension that is defined
3642 * in terms of the parameters and input dimensions using an equality,
3643 * extract an isl_aff that expresses the output dimension in terms
3644 * of the parameters and input dimensions.
3646 * Since some applications expect the result of isl_pw_multi_aff_from_map
3647 * to only contain integer affine expressions, we compute the floor
3648 * of the expression before returning.
3650 * This function shares some similarities with
3651 * isl_basic_map_has_defining_equality and isl_constraint_get_bound.
3653 static __isl_give isl_aff *extract_isl_aff_from_basic_map(
3654 __isl_take isl_basic_map *bmap)
3659 isl_local_space *ls;
3664 if (isl_basic_map_dim(bmap, isl_dim_out) != 1)
3665 isl_die(isl_basic_map_get_ctx(bmap), isl_error_invalid,
3666 "basic map should have a single output dimension",
3668 offset = isl_basic_map_offset(bmap, isl_dim_out);
3669 total = isl_basic_map_total_dim(bmap);
3670 for (i = 0; i < bmap->n_eq; ++i) {
3671 if (isl_int_is_zero(bmap->eq[i][offset]))
3673 if (isl_seq_first_non_zero(bmap->eq[i] + offset + 1,
3674 1 + total - (offset + 1)) != -1)
3678 if (i >= bmap->n_eq)
3679 isl_die(isl_basic_map_get_ctx(bmap), isl_error_invalid,
3680 "unable to find suitable equality", goto error);
3681 ls = isl_basic_map_get_local_space(bmap);
3682 aff = isl_aff_alloc(isl_local_space_domain(ls));
3685 if (isl_int_is_neg(bmap->eq[i][offset]))
3686 isl_seq_cpy(aff->v->el + 1, bmap->eq[i], offset);
3688 isl_seq_neg(aff->v->el + 1, bmap->eq[i], offset);
3689 isl_seq_clr(aff->v->el + 1 + offset, aff->v->size - (1 + offset));
3690 isl_int_abs(aff->v->el[0], bmap->eq[i][offset]);
3691 isl_basic_map_free(bmap);
3693 aff = isl_aff_remove_unused_divs(aff);
3694 aff = isl_aff_floor(aff);
3697 isl_basic_map_free(bmap);
3701 /* Given a basic map where each output dimension is defined
3702 * in terms of the parameters and input dimensions using an equality,
3703 * extract an isl_multi_aff that expresses the output dimensions in terms
3704 * of the parameters and input dimensions.
3706 static __isl_give isl_multi_aff *extract_isl_multi_aff_from_basic_map(
3707 __isl_take isl_basic_map *bmap)
3716 ma = isl_multi_aff_alloc(isl_basic_map_get_space(bmap));
3717 n_out = isl_basic_map_dim(bmap, isl_dim_out);
3719 for (i = 0; i < n_out; ++i) {
3720 isl_basic_map *bmap_i;
3723 bmap_i = isl_basic_map_copy(bmap);
3724 bmap_i = isl_basic_map_project_out(bmap_i, isl_dim_out,
3725 i + 1, n_out - (1 + i));
3726 bmap_i = isl_basic_map_project_out(bmap_i, isl_dim_out, 0, i);
3727 aff = extract_isl_aff_from_basic_map(bmap_i);
3728 ma = isl_multi_aff_set_aff(ma, i, aff);
3731 isl_basic_map_free(bmap);
3736 /* Create an isl_pw_multi_aff that is equivalent to
3737 * isl_map_intersect_domain(isl_map_from_basic_map(bmap), domain).
3738 * The given basic map is such that each output dimension is defined
3739 * in terms of the parameters and input dimensions using an equality.
3741 static __isl_give isl_pw_multi_aff *plain_pw_multi_aff_from_map(
3742 __isl_take isl_set *domain, __isl_take isl_basic_map *bmap)
3746 ma = extract_isl_multi_aff_from_basic_map(bmap);
3747 return isl_pw_multi_aff_alloc(domain, ma);
3750 /* Try and create an isl_pw_multi_aff that is equivalent to the given isl_map.
3751 * This obviously only works if the input "map" is single-valued.
3752 * If so, we compute the lexicographic minimum of the image in the form
3753 * of an isl_pw_multi_aff. Since the image is unique, it is equal
3754 * to its lexicographic minimum.
3755 * If the input is not single-valued, we produce an error.
3757 static __isl_give isl_pw_multi_aff *pw_multi_aff_from_map_base(
3758 __isl_take isl_map *map)
3762 isl_pw_multi_aff *pma;
3764 sv = isl_map_is_single_valued(map);
3768 isl_die(isl_map_get_ctx(map), isl_error_invalid,
3769 "map is not single-valued", goto error);
3770 map = isl_map_make_disjoint(map);
3774 pma = isl_pw_multi_aff_empty(isl_map_get_space(map));
3776 for (i = 0; i < map->n; ++i) {
3777 isl_pw_multi_aff *pma_i;
3778 isl_basic_map *bmap;
3779 bmap = isl_basic_map_copy(map->p[i]);
3780 pma_i = isl_basic_map_lexmin_pw_multi_aff(bmap);
3781 pma = isl_pw_multi_aff_add_disjoint(pma, pma_i);
3791 /* Try and create an isl_pw_multi_aff that is equivalent to the given isl_map,
3792 * taking into account that the output dimension at position "d"
3793 * can be represented as
3795 * x = floor((e(...) + c1) / m)
3797 * given that constraint "i" is of the form
3799 * e(...) + c1 - m x >= 0
3802 * Let "map" be of the form
3806 * We construct a mapping
3808 * A -> [A -> x = floor(...)]
3810 * apply that to the map, obtaining
3812 * [A -> x = floor(...)] -> B
3814 * and equate dimension "d" to x.
3815 * We then compute a isl_pw_multi_aff representation of the resulting map
3816 * and plug in the mapping above.
3818 static __isl_give isl_pw_multi_aff *pw_multi_aff_from_map_div(
3819 __isl_take isl_map *map, __isl_take isl_basic_map *hull, int d, int i)
3823 isl_local_space *ls;
3831 isl_pw_multi_aff *pma;
3834 is_set = isl_map_is_set(map);
3836 offset = isl_basic_map_offset(hull, isl_dim_out);
3837 ctx = isl_map_get_ctx(map);
3838 space = isl_space_domain(isl_map_get_space(map));
3839 n_in = isl_space_dim(space, isl_dim_set);
3840 n = isl_space_dim(space, isl_dim_all);
3842 v = isl_vec_alloc(ctx, 1 + 1 + n);
3844 isl_int_neg(v->el[0], hull->ineq[i][offset + d]);
3845 isl_seq_cpy(v->el + 1, hull->ineq[i], 1 + n);
3847 isl_basic_map_free(hull);
3849 ls = isl_local_space_from_space(isl_space_copy(space));
3850 aff = isl_aff_alloc_vec(ls, v);
3851 aff = isl_aff_floor(aff);
3853 isl_space_free(space);
3854 ma = isl_multi_aff_from_aff(aff);
3856 ma = isl_multi_aff_identity(isl_space_map_from_set(space));
3857 ma = isl_multi_aff_range_product(ma,
3858 isl_multi_aff_from_aff(aff));
3861 insert = isl_map_from_multi_aff(isl_multi_aff_copy(ma));
3862 map = isl_map_apply_domain(map, insert);
3863 map = isl_map_equate(map, isl_dim_in, n_in, isl_dim_out, d);
3864 pma = isl_pw_multi_aff_from_map(map);
3865 pma = isl_pw_multi_aff_pullback_multi_aff(pma, ma);
3870 /* Is constraint "c" of the form
3872 * e(...) + c1 - m x >= 0
3876 * -e(...) + c2 + m x >= 0
3878 * where m > 1 and e only depends on parameters and input dimemnsions?
3880 * "offset" is the offset of the output dimensions
3881 * "pos" is the position of output dimension x.
3883 static int is_potential_div_constraint(isl_int *c, int offset, int d, int total)
3885 if (isl_int_is_zero(c[offset + d]))
3887 if (isl_int_is_one(c[offset + d]))
3889 if (isl_int_is_negone(c[offset + d]))
3891 if (isl_seq_first_non_zero(c + offset, d) != -1)
3893 if (isl_seq_first_non_zero(c + offset + d + 1,
3894 total - (offset + d + 1)) != -1)
3899 /* Try and create an isl_pw_multi_aff that is equivalent to the given isl_map.
3901 * As a special case, we first check if there is any pair of constraints,
3902 * shared by all the basic maps in "map" that force a given dimension
3903 * to be equal to the floor of some affine combination of the input dimensions.
3905 * In particular, if we can find two constraints
3907 * e(...) + c1 - m x >= 0 i.e., m x <= e(...) + c1
3911 * -e(...) + c2 + m x >= 0 i.e., m x >= e(...) - c2
3913 * where m > 1 and e only depends on parameters and input dimemnsions,
3916 * c1 + c2 < m i.e., -c2 >= c1 - (m - 1)
3918 * then we know that we can take
3920 * x = floor((e(...) + c1) / m)
3922 * without having to perform any computation.
3924 * Note that we know that
3928 * If c1 + c2 were 0, then we would have detected an equality during
3929 * simplification. If c1 + c2 were negative, then we would have detected
3932 static __isl_give isl_pw_multi_aff *pw_multi_aff_from_map_check_div(
3933 __isl_take isl_map *map)
3939 isl_basic_map *hull;
3941 hull = isl_map_unshifted_simple_hull(isl_map_copy(map));
3946 dim = isl_map_dim(map, isl_dim_out);
3947 offset = isl_basic_map_offset(hull, isl_dim_out);
3948 total = 1 + isl_basic_map_total_dim(hull);
3950 for (d = 0; d < dim; ++d) {
3951 for (i = 0; i < n; ++i) {
3952 if (!is_potential_div_constraint(hull->ineq[i],
3955 for (j = i + 1; j < n; ++j) {
3956 if (!isl_seq_is_neg(hull->ineq[i] + 1,
3957 hull->ineq[j] + 1, total - 1))
3959 isl_int_add(sum, hull->ineq[i][0],
3961 if (isl_int_abs_lt(sum,
3962 hull->ineq[i][offset + d]))
3969 if (isl_int_is_pos(hull->ineq[j][offset + d]))
3971 return pw_multi_aff_from_map_div(map, hull, d, j);
3975 isl_basic_map_free(hull);
3976 return pw_multi_aff_from_map_base(map);
3979 isl_basic_map_free(hull);
3983 /* Given an affine expression
3985 * [A -> B] -> f(A,B)
3987 * construct an isl_multi_aff
3991 * such that dimension "d" in B' is set to "aff" and the remaining
3992 * dimensions are set equal to the corresponding dimensions in B.
3993 * "n_in" is the dimension of the space A.
3994 * "n_out" is the dimension of the space B.
3996 * If "is_set" is set, then the affine expression is of the form
4000 * and we construct an isl_multi_aff
4004 static __isl_give isl_multi_aff *range_map(__isl_take isl_aff *aff, int d,
4005 unsigned n_in, unsigned n_out, int is_set)
4009 isl_space *space, *space2;
4010 isl_local_space *ls;
4012 space = isl_aff_get_domain_space(aff);
4013 ls = isl_local_space_from_space(isl_space_copy(space));
4014 space2 = isl_space_copy(space);
4016 space2 = isl_space_range(isl_space_unwrap(space2));
4017 space = isl_space_map_from_domain_and_range(space, space2);
4018 ma = isl_multi_aff_alloc(space);
4019 ma = isl_multi_aff_set_aff(ma, d, aff);
4021 for (i = 0; i < n_out; ++i) {
4024 aff = isl_aff_var_on_domain(isl_local_space_copy(ls),
4025 isl_dim_set, n_in + i);
4026 ma = isl_multi_aff_set_aff(ma, i, aff);
4029 isl_local_space_free(ls);
4034 /* Try and create an isl_pw_multi_aff that is equivalent to the given isl_map,
4035 * taking into account that the dimension at position "d" can be written as
4037 * x = m a + f(..) (1)
4039 * where m is equal to "gcd".
4040 * "i" is the index of the equality in "hull" that defines f(..).
4041 * In particular, the equality is of the form
4043 * f(..) - x + m g(existentials) = 0
4047 * -f(..) + x + m g(existentials) = 0
4049 * We basically plug (1) into "map", resulting in a map with "a"
4050 * in the range instead of "x". The corresponding isl_pw_multi_aff
4051 * defining "a" is then plugged back into (1) to obtain a definition fro "x".
4053 * Specifically, given the input map
4057 * We first wrap it into a set
4061 * and define (1) on top of the corresponding space, resulting in "aff".
4062 * We use this to create an isl_multi_aff that maps the output position "d"
4063 * from "a" to "x", leaving all other (intput and output) dimensions unchanged.
4064 * We plug this into the wrapped map, unwrap the result and compute the
4065 * corresponding isl_pw_multi_aff.
4066 * The result is an expression
4074 * so that we can plug that into "aff", after extending the latter to
4080 * If "map" is actually a set, then there is no "A" space, meaning
4081 * that we do not need to perform any wrapping, and that the result
4082 * of the recursive call is of the form
4086 * which is plugged into a mapping of the form
4090 static __isl_give isl_pw_multi_aff *pw_multi_aff_from_map_stride(
4091 __isl_take isl_map *map, __isl_take isl_basic_map *hull, int d, int i,
4096 isl_local_space *ls;
4099 isl_pw_multi_aff *pma, *id;
4105 is_set = isl_map_is_set(map);
4107 n_in = isl_basic_map_dim(hull, isl_dim_in);
4108 n_out = isl_basic_map_dim(hull, isl_dim_out);
4109 o_out = isl_basic_map_offset(hull, isl_dim_out);
4114 set = isl_map_wrap(map);
4115 space = isl_space_map_from_set(isl_set_get_space(set));
4116 ma = isl_multi_aff_identity(space);
4117 ls = isl_local_space_from_space(isl_set_get_space(set));
4118 aff = isl_aff_alloc(ls);
4120 isl_int_set_si(aff->v->el[0], 1);
4121 if (isl_int_is_one(hull->eq[i][o_out + d]))
4122 isl_seq_neg(aff->v->el + 1, hull->eq[i],
4125 isl_seq_cpy(aff->v->el + 1, hull->eq[i],
4127 isl_int_set(aff->v->el[1 + o_out + d], gcd);
4129 ma = isl_multi_aff_set_aff(ma, n_in + d, isl_aff_copy(aff));
4130 set = isl_set_preimage_multi_aff(set, ma);
4132 ma = range_map(aff, d, n_in, n_out, is_set);
4137 map = isl_set_unwrap(set);
4138 pma = isl_pw_multi_aff_from_map(set);
4141 space = isl_pw_multi_aff_get_domain_space(pma);
4142 space = isl_space_map_from_set(space);
4143 id = isl_pw_multi_aff_identity(space);
4144 pma = isl_pw_multi_aff_range_product(id, pma);
4146 id = isl_pw_multi_aff_from_multi_aff(ma);
4147 pma = isl_pw_multi_aff_pullback_pw_multi_aff(id, pma);
4149 isl_basic_map_free(hull);
4153 /* Try and create an isl_pw_multi_aff that is equivalent to the given isl_map.
4155 * As a special case, we first check if all output dimensions are uniquely
4156 * defined in terms of the parameters and input dimensions over the entire
4157 * domain. If so, we extract the desired isl_pw_multi_aff directly
4158 * from the affine hull of "map" and its domain.
4160 * Otherwise, we check if any of the output dimensions is "strided".
4161 * That is, we check if can be written as
4165 * with m greater than 1, a some combination of existentiall quantified
4166 * variables and f and expression in the parameters and input dimensions.
4167 * If so, we remove the stride in pw_multi_aff_from_map_stride.
4169 * Otherwise, we continue with pw_multi_aff_from_map_check_div for a further
4172 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_map(__isl_take isl_map *map)
4176 isl_basic_map *hull;
4186 hull = isl_map_affine_hull(isl_map_copy(map));
4187 sv = isl_basic_map_plain_is_single_valued(hull);
4189 return plain_pw_multi_aff_from_map(isl_map_domain(map), hull);
4191 hull = isl_basic_map_free(hull);
4195 n_div = isl_basic_map_dim(hull, isl_dim_div);
4196 o_div = isl_basic_map_offset(hull, isl_dim_div);
4199 isl_basic_map_free(hull);
4200 return pw_multi_aff_from_map_check_div(map);
4205 n_out = isl_basic_map_dim(hull, isl_dim_out);
4206 o_out = isl_basic_map_offset(hull, isl_dim_out);
4208 for (i = 0; i < n_out; ++i) {
4209 for (j = 0; j < hull->n_eq; ++j) {
4210 isl_int *eq = hull->eq[j];
4211 isl_pw_multi_aff *res;
4213 if (!isl_int_is_one(eq[o_out + i]) &&
4214 !isl_int_is_negone(eq[o_out + i]))
4216 if (isl_seq_first_non_zero(eq + o_out, i) != -1)
4218 if (isl_seq_first_non_zero(eq + o_out + i + 1,
4219 n_out - (i + 1)) != -1)
4221 isl_seq_gcd(eq + o_div, n_div, &gcd);
4222 if (isl_int_is_zero(gcd))
4224 if (isl_int_is_one(gcd))
4227 res = pw_multi_aff_from_map_stride(map, hull,
4235 isl_basic_map_free(hull);
4236 return pw_multi_aff_from_map_check_div(map);
4242 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_set(__isl_take isl_set *set)
4244 return isl_pw_multi_aff_from_map(set);
4247 /* Convert "map" into an isl_pw_multi_aff (if possible) and
4250 static int pw_multi_aff_from_map(__isl_take isl_map *map, void *user)
4252 isl_union_pw_multi_aff **upma = user;
4253 isl_pw_multi_aff *pma;
4255 pma = isl_pw_multi_aff_from_map(map);
4256 *upma = isl_union_pw_multi_aff_add_pw_multi_aff(*upma, pma);
4258 return *upma ? 0 : -1;
4261 /* Try and create an isl_union_pw_multi_aff that is equivalent
4262 * to the given isl_union_map.
4263 * The isl_union_map is required to be single-valued in each space.
4264 * Otherwise, an error is produced.
4266 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_from_union_map(
4267 __isl_take isl_union_map *umap)
4270 isl_union_pw_multi_aff *upma;
4272 space = isl_union_map_get_space(umap);
4273 upma = isl_union_pw_multi_aff_empty(space);
4274 if (isl_union_map_foreach_map(umap, &pw_multi_aff_from_map, &upma) < 0)
4275 upma = isl_union_pw_multi_aff_free(upma);
4276 isl_union_map_free(umap);
4281 /* Try and create an isl_union_pw_multi_aff that is equivalent
4282 * to the given isl_union_set.
4283 * The isl_union_set is required to be a singleton in each space.
4284 * Otherwise, an error is produced.
4286 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_from_union_set(
4287 __isl_take isl_union_set *uset)
4289 return isl_union_pw_multi_aff_from_union_map(uset);
4292 /* Return the piecewise affine expression "set ? 1 : 0".
4294 __isl_give isl_pw_aff *isl_set_indicator_function(__isl_take isl_set *set)
4297 isl_space *space = isl_set_get_space(set);
4298 isl_local_space *ls = isl_local_space_from_space(space);
4299 isl_aff *zero = isl_aff_zero_on_domain(isl_local_space_copy(ls));
4300 isl_aff *one = isl_aff_zero_on_domain(ls);
4302 one = isl_aff_add_constant_si(one, 1);
4303 pa = isl_pw_aff_alloc(isl_set_copy(set), one);
4304 set = isl_set_complement(set);
4305 pa = isl_pw_aff_add_disjoint(pa, isl_pw_aff_alloc(set, zero));
4310 /* Plug in "subs" for dimension "type", "pos" of "aff".
4312 * Let i be the dimension to replace and let "subs" be of the form
4316 * and "aff" of the form
4322 * (a f + d g')/(m d)
4324 * where g' is the result of plugging in "subs" in each of the integer
4327 __isl_give isl_aff *isl_aff_substitute(__isl_take isl_aff *aff,
4328 enum isl_dim_type type, unsigned pos, __isl_keep isl_aff *subs)
4333 aff = isl_aff_cow(aff);
4335 return isl_aff_free(aff);
4337 ctx = isl_aff_get_ctx(aff);
4338 if (!isl_space_is_equal(aff->ls->dim, subs->ls->dim))
4339 isl_die(ctx, isl_error_invalid,
4340 "spaces don't match", return isl_aff_free(aff));
4341 if (isl_local_space_dim(subs->ls, isl_dim_div) != 0)
4342 isl_die(ctx, isl_error_unsupported,
4343 "cannot handle divs yet", return isl_aff_free(aff));
4345 aff->ls = isl_local_space_substitute(aff->ls, type, pos, subs);
4347 return isl_aff_free(aff);
4349 aff->v = isl_vec_cow(aff->v);
4351 return isl_aff_free(aff);
4353 pos += isl_local_space_offset(aff->ls, type);
4356 isl_seq_substitute(aff->v->el, pos, subs->v->el,
4357 aff->v->size, subs->v->size, v);
4363 /* Plug in "subs" for dimension "type", "pos" in each of the affine
4364 * expressions in "maff".
4366 __isl_give isl_multi_aff *isl_multi_aff_substitute(
4367 __isl_take isl_multi_aff *maff, enum isl_dim_type type, unsigned pos,
4368 __isl_keep isl_aff *subs)
4372 maff = isl_multi_aff_cow(maff);
4374 return isl_multi_aff_free(maff);
4376 if (type == isl_dim_in)
4379 for (i = 0; i < maff->n; ++i) {
4380 maff->p[i] = isl_aff_substitute(maff->p[i], type, pos, subs);
4382 return isl_multi_aff_free(maff);
4388 /* Plug in "subs" for dimension "type", "pos" of "pma".
4390 * pma is of the form
4394 * while subs is of the form
4396 * v' = B_j(v) -> S_j
4398 * Each pair i,j such that C_ij = A_i \cap B_i is non-empty
4399 * has a contribution in the result, in particular
4401 * C_ij(S_j) -> M_i(S_j)
4403 * Note that plugging in S_j in C_ij may also result in an empty set
4404 * and this contribution should simply be discarded.
4406 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_substitute(
4407 __isl_take isl_pw_multi_aff *pma, enum isl_dim_type type, unsigned pos,
4408 __isl_keep isl_pw_aff *subs)
4411 isl_pw_multi_aff *res;
4414 return isl_pw_multi_aff_free(pma);
4416 n = pma->n * subs->n;
4417 res = isl_pw_multi_aff_alloc_size(isl_space_copy(pma->dim), n);
4419 for (i = 0; i < pma->n; ++i) {
4420 for (j = 0; j < subs->n; ++j) {
4422 isl_multi_aff *res_ij;
4425 common = isl_set_intersect(
4426 isl_set_copy(pma->p[i].set),
4427 isl_set_copy(subs->p[j].set));
4428 common = isl_set_substitute(common,
4429 type, pos, subs->p[j].aff);
4430 empty = isl_set_plain_is_empty(common);
4431 if (empty < 0 || empty) {
4432 isl_set_free(common);
4438 res_ij = isl_multi_aff_substitute(
4439 isl_multi_aff_copy(pma->p[i].maff),
4440 type, pos, subs->p[j].aff);
4442 res = isl_pw_multi_aff_add_piece(res, common, res_ij);
4446 isl_pw_multi_aff_free(pma);
4449 isl_pw_multi_aff_free(pma);
4450 isl_pw_multi_aff_free(res);
4454 /* Compute the preimage of a range of dimensions in the affine expression "src"
4455 * under "ma" and put the result in "dst". The number of dimensions in "src"
4456 * that precede the range is given by "n_before". The number of dimensions
4457 * in the range is given by the number of output dimensions of "ma".
4458 * The number of dimensions that follow the range is given by "n_after".
4459 * If "has_denom" is set (to one),
4460 * then "src" and "dst" have an extra initial denominator.
4461 * "n_div_ma" is the number of existentials in "ma"
4462 * "n_div_bset" is the number of existentials in "src"
4463 * The resulting "dst" (which is assumed to have been allocated by
4464 * the caller) contains coefficients for both sets of existentials,
4465 * first those in "ma" and then those in "src".
4466 * f, c1, c2 and g are temporary objects that have been initialized
4469 * Let src represent the expression
4471 * (a(p) + f_u u + b v + f_w w + c(divs))/d
4473 * and let ma represent the expressions
4475 * v_i = (r_i(p) + s_i(y) + t_i(divs'))/m_i
4477 * We start out with the following expression for dst:
4479 * (a(p) + f_u u + 0 y + f_w w + 0 divs' + c(divs) + f \sum_i b_i v_i)/d
4481 * with the multiplication factor f initially equal to 1
4482 * and f \sum_i b_i v_i kept separately.
4483 * For each x_i that we substitute, we multiply the numerator
4484 * (and denominator) of dst by c_1 = m_i and add the numerator
4485 * of the x_i expression multiplied by c_2 = f b_i,
4486 * after removing the common factors of c_1 and c_2.
4487 * The multiplication factor f also needs to be multiplied by c_1
4488 * for the next x_j, j > i.
4490 void isl_seq_preimage(isl_int *dst, isl_int *src,
4491 __isl_keep isl_multi_aff *ma, int n_before, int n_after,
4492 int n_div_ma, int n_div_bmap,
4493 isl_int f, isl_int c1, isl_int c2, isl_int g, int has_denom)
4496 int n_param, n_in, n_out;
4499 n_param = isl_multi_aff_dim(ma, isl_dim_param);
4500 n_in = isl_multi_aff_dim(ma, isl_dim_in);
4501 n_out = isl_multi_aff_dim(ma, isl_dim_out);
4503 isl_seq_cpy(dst, src, has_denom + 1 + n_param + n_before);
4504 o_dst = o_src = has_denom + 1 + n_param + n_before;
4505 isl_seq_clr(dst + o_dst, n_in);
4508 isl_seq_cpy(dst + o_dst, src + o_src, n_after);
4511 isl_seq_clr(dst + o_dst, n_div_ma);
4513 isl_seq_cpy(dst + o_dst, src + o_src, n_div_bmap);
4515 isl_int_set_si(f, 1);
4517 for (i = 0; i < n_out; ++i) {
4518 int offset = has_denom + 1 + n_param + n_before + i;
4520 if (isl_int_is_zero(src[offset]))
4522 isl_int_set(c1, ma->p[i]->v->el[0]);
4523 isl_int_mul(c2, f, src[offset]);
4524 isl_int_gcd(g, c1, c2);
4525 isl_int_divexact(c1, c1, g);
4526 isl_int_divexact(c2, c2, g);
4528 isl_int_mul(f, f, c1);
4531 isl_seq_combine(dst + o_dst, c1, dst + o_dst,
4532 c2, ma->p[i]->v->el + o_src, 1 + n_param);
4533 o_dst += 1 + n_param;
4534 o_src += 1 + n_param;
4535 isl_seq_scale(dst + o_dst, dst + o_dst, c1, n_before);
4537 isl_seq_combine(dst + o_dst, c1, dst + o_dst,
4538 c2, ma->p[i]->v->el + o_src, n_in);
4541 isl_seq_scale(dst + o_dst, dst + o_dst, c1, n_after);
4543 isl_seq_combine(dst + o_dst, c1, dst + o_dst,
4544 c2, ma->p[i]->v->el + o_src, n_div_ma);
4547 isl_seq_scale(dst + o_dst, dst + o_dst, c1, n_div_bmap);
4549 isl_int_mul(dst[0], dst[0], c1);
4553 /* Compute the pullback of "aff" by the function represented by "ma".
4554 * In other words, plug in "ma" in "aff". The result is an affine expression
4555 * defined over the domain space of "ma".
4557 * If "aff" is represented by
4559 * (a(p) + b x + c(divs))/d
4561 * and ma is represented by
4563 * x = D(p) + F(y) + G(divs')
4565 * then the result is
4567 * (a(p) + b D(p) + b F(y) + b G(divs') + c(divs))/d
4569 * The divs in the local space of the input are similarly adjusted
4570 * through a call to isl_local_space_preimage_multi_aff.
4572 __isl_give isl_aff *isl_aff_pullback_multi_aff(__isl_take isl_aff *aff,
4573 __isl_take isl_multi_aff *ma)
4575 isl_aff *res = NULL;
4576 isl_local_space *ls;
4577 int n_div_aff, n_div_ma;
4578 isl_int f, c1, c2, g;
4580 ma = isl_multi_aff_align_divs(ma);
4584 n_div_aff = isl_aff_dim(aff, isl_dim_div);
4585 n_div_ma = ma->n ? isl_aff_dim(ma->p[0], isl_dim_div) : 0;
4587 ls = isl_aff_get_domain_local_space(aff);
4588 ls = isl_local_space_preimage_multi_aff(ls, isl_multi_aff_copy(ma));
4589 res = isl_aff_alloc(ls);
4598 isl_seq_preimage(res->v->el, aff->v->el, ma, 0, 0, n_div_ma, n_div_aff,
4607 isl_multi_aff_free(ma);
4608 res = isl_aff_normalize(res);
4612 isl_multi_aff_free(ma);
4617 /* Compute the pullback of "ma1" by the function represented by "ma2".
4618 * In other words, plug in "ma2" in "ma1".
4620 __isl_give isl_multi_aff *isl_multi_aff_pullback_multi_aff(
4621 __isl_take isl_multi_aff *ma1, __isl_take isl_multi_aff *ma2)
4624 isl_space *space = NULL;
4626 ma2 = isl_multi_aff_align_divs(ma2);
4627 ma1 = isl_multi_aff_cow(ma1);
4631 space = isl_space_join(isl_multi_aff_get_space(ma2),
4632 isl_multi_aff_get_space(ma1));
4634 for (i = 0; i < ma1->n; ++i) {
4635 ma1->p[i] = isl_aff_pullback_multi_aff(ma1->p[i],
4636 isl_multi_aff_copy(ma2));
4641 ma1 = isl_multi_aff_reset_space(ma1, space);
4642 isl_multi_aff_free(ma2);
4645 isl_space_free(space);
4646 isl_multi_aff_free(ma2);
4647 isl_multi_aff_free(ma1);
4651 /* Extend the local space of "dst" to include the divs
4652 * in the local space of "src".
4654 __isl_give isl_aff *isl_aff_align_divs(__isl_take isl_aff *dst,
4655 __isl_keep isl_aff *src)
4663 return isl_aff_free(dst);
4665 ctx = isl_aff_get_ctx(src);
4666 if (!isl_space_is_equal(src->ls->dim, dst->ls->dim))
4667 isl_die(ctx, isl_error_invalid,
4668 "spaces don't match", goto error);
4670 if (src->ls->div->n_row == 0)
4673 exp1 = isl_alloc_array(ctx, int, src->ls->div->n_row);
4674 exp2 = isl_alloc_array(ctx, int, dst->ls->div->n_row);
4678 div = isl_merge_divs(src->ls->div, dst->ls->div, exp1, exp2);
4679 dst = isl_aff_expand_divs(dst, div, exp2);
4687 return isl_aff_free(dst);
4690 /* Adjust the local spaces of the affine expressions in "maff"
4691 * such that they all have the save divs.
4693 __isl_give isl_multi_aff *isl_multi_aff_align_divs(
4694 __isl_take isl_multi_aff *maff)
4702 maff = isl_multi_aff_cow(maff);
4706 for (i = 1; i < maff->n; ++i)
4707 maff->p[0] = isl_aff_align_divs(maff->p[0], maff->p[i]);
4708 for (i = 1; i < maff->n; ++i) {
4709 maff->p[i] = isl_aff_align_divs(maff->p[i], maff->p[0]);
4711 return isl_multi_aff_free(maff);
4717 __isl_give isl_aff *isl_aff_lift(__isl_take isl_aff *aff)
4719 aff = isl_aff_cow(aff);
4723 aff->ls = isl_local_space_lift(aff->ls);
4725 return isl_aff_free(aff);
4730 /* Lift "maff" to a space with extra dimensions such that the result
4731 * has no more existentially quantified variables.
4732 * If "ls" is not NULL, then *ls is assigned the local space that lies
4733 * at the basis of the lifting applied to "maff".
4735 __isl_give isl_multi_aff *isl_multi_aff_lift(__isl_take isl_multi_aff *maff,
4736 __isl_give isl_local_space **ls)
4750 isl_space *space = isl_multi_aff_get_domain_space(maff);
4751 *ls = isl_local_space_from_space(space);
4753 return isl_multi_aff_free(maff);
4758 maff = isl_multi_aff_cow(maff);
4759 maff = isl_multi_aff_align_divs(maff);
4763 n_div = isl_aff_dim(maff->p[0], isl_dim_div);
4764 space = isl_multi_aff_get_space(maff);
4765 space = isl_space_lift(isl_space_domain(space), n_div);
4766 space = isl_space_extend_domain_with_range(space,
4767 isl_multi_aff_get_space(maff));
4769 return isl_multi_aff_free(maff);
4770 isl_space_free(maff->space);
4771 maff->space = space;
4774 *ls = isl_aff_get_domain_local_space(maff->p[0]);
4776 return isl_multi_aff_free(maff);
4779 for (i = 0; i < maff->n; ++i) {
4780 maff->p[i] = isl_aff_lift(maff->p[i]);
4788 isl_local_space_free(*ls);
4789 return isl_multi_aff_free(maff);
4793 /* Extract an isl_pw_aff corresponding to output dimension "pos" of "pma".
4795 __isl_give isl_pw_aff *isl_pw_multi_aff_get_pw_aff(
4796 __isl_keep isl_pw_multi_aff *pma, int pos)
4806 n_out = isl_pw_multi_aff_dim(pma, isl_dim_out);
4807 if (pos < 0 || pos >= n_out)
4808 isl_die(isl_pw_multi_aff_get_ctx(pma), isl_error_invalid,
4809 "index out of bounds", return NULL);
4811 space = isl_pw_multi_aff_get_space(pma);
4812 space = isl_space_drop_dims(space, isl_dim_out,
4813 pos + 1, n_out - pos - 1);
4814 space = isl_space_drop_dims(space, isl_dim_out, 0, pos);
4816 pa = isl_pw_aff_alloc_size(space, pma->n);
4817 for (i = 0; i < pma->n; ++i) {
4819 aff = isl_multi_aff_get_aff(pma->p[i].maff, pos);
4820 pa = isl_pw_aff_add_piece(pa, isl_set_copy(pma->p[i].set), aff);
4826 /* Return an isl_pw_multi_aff with the given "set" as domain and
4827 * an unnamed zero-dimensional range.
4829 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_domain(
4830 __isl_take isl_set *set)
4835 space = isl_set_get_space(set);
4836 space = isl_space_from_domain(space);
4837 ma = isl_multi_aff_zero(space);
4838 return isl_pw_multi_aff_alloc(set, ma);
4841 /* Add an isl_pw_multi_aff with the given "set" as domain and
4842 * an unnamed zero-dimensional range to *user.
4844 static int add_pw_multi_aff_from_domain(__isl_take isl_set *set, void *user)
4846 isl_union_pw_multi_aff **upma = user;
4847 isl_pw_multi_aff *pma;
4849 pma = isl_pw_multi_aff_from_domain(set);
4850 *upma = isl_union_pw_multi_aff_add_pw_multi_aff(*upma, pma);
4855 /* Return an isl_union_pw_multi_aff with the given "uset" as domain and
4856 * an unnamed zero-dimensional range.
4858 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_from_domain(
4859 __isl_take isl_union_set *uset)
4862 isl_union_pw_multi_aff *upma;
4867 space = isl_union_set_get_space(uset);
4868 upma = isl_union_pw_multi_aff_empty(space);
4870 if (isl_union_set_foreach_set(uset,
4871 &add_pw_multi_aff_from_domain, &upma) < 0)
4874 isl_union_set_free(uset);
4877 isl_union_set_free(uset);
4878 isl_union_pw_multi_aff_free(upma);
4882 /* Convert "pma" to an isl_map and add it to *umap.
4884 static int map_from_pw_multi_aff(__isl_take isl_pw_multi_aff *pma, void *user)
4886 isl_union_map **umap = user;
4889 map = isl_map_from_pw_multi_aff(pma);
4890 *umap = isl_union_map_add_map(*umap, map);
4895 /* Construct a union map mapping the domain of the union
4896 * piecewise multi-affine expression to its range, with each dimension
4897 * in the range equated to the corresponding affine expression on its cell.
4899 __isl_give isl_union_map *isl_union_map_from_union_pw_multi_aff(
4900 __isl_take isl_union_pw_multi_aff *upma)
4903 isl_union_map *umap;
4908 space = isl_union_pw_multi_aff_get_space(upma);
4909 umap = isl_union_map_empty(space);
4911 if (isl_union_pw_multi_aff_foreach_pw_multi_aff(upma,
4912 &map_from_pw_multi_aff, &umap) < 0)
4915 isl_union_pw_multi_aff_free(upma);
4918 isl_union_pw_multi_aff_free(upma);
4919 isl_union_map_free(umap);
4923 /* Local data for bin_entry and the callback "fn".
4925 struct isl_union_pw_multi_aff_bin_data {
4926 isl_union_pw_multi_aff *upma2;
4927 isl_union_pw_multi_aff *res;
4928 isl_pw_multi_aff *pma;
4929 int (*fn)(void **entry, void *user);
4932 /* Given an isl_pw_multi_aff from upma1, store it in data->pma
4933 * and call data->fn for each isl_pw_multi_aff in data->upma2.
4935 static int bin_entry(void **entry, void *user)
4937 struct isl_union_pw_multi_aff_bin_data *data = user;
4938 isl_pw_multi_aff *pma = *entry;
4941 if (isl_hash_table_foreach(data->upma2->dim->ctx, &data->upma2->table,
4942 data->fn, data) < 0)
4948 /* Call "fn" on each pair of isl_pw_multi_affs in "upma1" and "upma2".
4949 * The isl_pw_multi_aff from upma1 is stored in data->pma (where data is
4950 * passed as user field) and the isl_pw_multi_aff from upma2 is available
4951 * as *entry. The callback should adjust data->res if desired.
4953 static __isl_give isl_union_pw_multi_aff *bin_op(
4954 __isl_take isl_union_pw_multi_aff *upma1,
4955 __isl_take isl_union_pw_multi_aff *upma2,
4956 int (*fn)(void **entry, void *user))
4959 struct isl_union_pw_multi_aff_bin_data data = { NULL, NULL, NULL, fn };
4961 space = isl_union_pw_multi_aff_get_space(upma2);
4962 upma1 = isl_union_pw_multi_aff_align_params(upma1, space);
4963 space = isl_union_pw_multi_aff_get_space(upma1);
4964 upma2 = isl_union_pw_multi_aff_align_params(upma2, space);
4966 if (!upma1 || !upma2)
4970 data.res = isl_union_pw_multi_aff_alloc(isl_space_copy(upma1->dim),
4972 if (isl_hash_table_foreach(upma1->dim->ctx, &upma1->table,
4973 &bin_entry, &data) < 0)
4976 isl_union_pw_multi_aff_free(upma1);
4977 isl_union_pw_multi_aff_free(upma2);
4980 isl_union_pw_multi_aff_free(upma1);
4981 isl_union_pw_multi_aff_free(upma2);
4982 isl_union_pw_multi_aff_free(data.res);
4986 /* Given two aligned isl_pw_multi_affs A -> B and C -> D,
4987 * construct an isl_pw_multi_aff (A * C) -> [B -> D].
4989 static __isl_give isl_pw_multi_aff *pw_multi_aff_range_product(
4990 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
4994 space = isl_space_range_product(isl_pw_multi_aff_get_space(pma1),
4995 isl_pw_multi_aff_get_space(pma2));
4996 return isl_pw_multi_aff_on_shared_domain_in(pma1, pma2, space,
4997 &isl_multi_aff_range_product);
5000 /* Given two isl_pw_multi_affs A -> B and C -> D,
5001 * construct an isl_pw_multi_aff (A * C) -> [B -> D].
5003 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_range_product(
5004 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
5006 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
5007 &pw_multi_aff_range_product);
5010 /* Given two aligned isl_pw_multi_affs A -> B and C -> D,
5011 * construct an isl_pw_multi_aff (A * C) -> (B, D).
5013 static __isl_give isl_pw_multi_aff *pw_multi_aff_flat_range_product(
5014 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
5018 space = isl_space_range_product(isl_pw_multi_aff_get_space(pma1),
5019 isl_pw_multi_aff_get_space(pma2));
5020 space = isl_space_flatten_range(space);
5021 return isl_pw_multi_aff_on_shared_domain_in(pma1, pma2, space,
5022 &isl_multi_aff_flat_range_product);
5025 /* Given two isl_pw_multi_affs A -> B and C -> D,
5026 * construct an isl_pw_multi_aff (A * C) -> (B, D).
5028 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_flat_range_product(
5029 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
5031 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
5032 &pw_multi_aff_flat_range_product);
5035 /* If data->pma and *entry have the same domain space, then compute
5036 * their flat range product and the result to data->res.
5038 static int flat_range_product_entry(void **entry, void *user)
5040 struct isl_union_pw_multi_aff_bin_data *data = user;
5041 isl_pw_multi_aff *pma2 = *entry;
5043 if (!isl_space_tuple_match(data->pma->dim, isl_dim_in,
5044 pma2->dim, isl_dim_in))
5047 pma2 = isl_pw_multi_aff_flat_range_product(
5048 isl_pw_multi_aff_copy(data->pma),
5049 isl_pw_multi_aff_copy(pma2));
5051 data->res = isl_union_pw_multi_aff_add_pw_multi_aff(data->res, pma2);
5056 /* Given two isl_union_pw_multi_affs A -> B and C -> D,
5057 * construct an isl_union_pw_multi_aff (A * C) -> (B, D).
5059 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_flat_range_product(
5060 __isl_take isl_union_pw_multi_aff *upma1,
5061 __isl_take isl_union_pw_multi_aff *upma2)
5063 return bin_op(upma1, upma2, &flat_range_product_entry);
5066 /* Replace the affine expressions at position "pos" in "pma" by "pa".
5067 * The parameters are assumed to have been aligned.
5069 * The implementation essentially performs an isl_pw_*_on_shared_domain,
5070 * except that it works on two different isl_pw_* types.
5072 static __isl_give isl_pw_multi_aff *pw_multi_aff_set_pw_aff(
5073 __isl_take isl_pw_multi_aff *pma, unsigned pos,
5074 __isl_take isl_pw_aff *pa)
5077 isl_pw_multi_aff *res = NULL;
5082 if (!isl_space_tuple_match(pma->dim, isl_dim_in, pa->dim, isl_dim_in))
5083 isl_die(isl_pw_multi_aff_get_ctx(pma), isl_error_invalid,
5084 "domains don't match", goto error);
5085 if (pos >= isl_pw_multi_aff_dim(pma, isl_dim_out))
5086 isl_die(isl_pw_multi_aff_get_ctx(pma), isl_error_invalid,
5087 "index out of bounds", goto error);
5090 res = isl_pw_multi_aff_alloc_size(isl_pw_multi_aff_get_space(pma), n);
5092 for (i = 0; i < pma->n; ++i) {
5093 for (j = 0; j < pa->n; ++j) {
5095 isl_multi_aff *res_ij;
5098 common = isl_set_intersect(isl_set_copy(pma->p[i].set),
5099 isl_set_copy(pa->p[j].set));
5100 empty = isl_set_plain_is_empty(common);
5101 if (empty < 0 || empty) {
5102 isl_set_free(common);
5108 res_ij = isl_multi_aff_set_aff(
5109 isl_multi_aff_copy(pma->p[i].maff), pos,
5110 isl_aff_copy(pa->p[j].aff));
5111 res_ij = isl_multi_aff_gist(res_ij,
5112 isl_set_copy(common));
5114 res = isl_pw_multi_aff_add_piece(res, common, res_ij);
5118 isl_pw_multi_aff_free(pma);
5119 isl_pw_aff_free(pa);
5122 isl_pw_multi_aff_free(pma);
5123 isl_pw_aff_free(pa);
5124 return isl_pw_multi_aff_free(res);
5127 /* Replace the affine expressions at position "pos" in "pma" by "pa".
5129 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_set_pw_aff(
5130 __isl_take isl_pw_multi_aff *pma, unsigned pos,
5131 __isl_take isl_pw_aff *pa)
5135 if (isl_space_match(pma->dim, isl_dim_param, pa->dim, isl_dim_param))
5136 return pw_multi_aff_set_pw_aff(pma, pos, pa);
5137 if (!isl_space_has_named_params(pma->dim) ||
5138 !isl_space_has_named_params(pa->dim))
5139 isl_die(isl_pw_multi_aff_get_ctx(pma), isl_error_invalid,
5140 "unaligned unnamed parameters", goto error);
5141 pma = isl_pw_multi_aff_align_params(pma, isl_pw_aff_get_space(pa));
5142 pa = isl_pw_aff_align_params(pa, isl_pw_multi_aff_get_space(pma));
5143 return pw_multi_aff_set_pw_aff(pma, pos, pa);
5145 isl_pw_multi_aff_free(pma);
5146 isl_pw_aff_free(pa);
5150 /* Check that the domain space of "pa" matches "space".
5152 * Return 0 on success and -1 on error.
5154 int isl_pw_aff_check_match_domain_space(__isl_keep isl_pw_aff *pa,
5155 __isl_keep isl_space *space)
5157 isl_space *pa_space;
5163 pa_space = isl_pw_aff_get_space(pa);
5165 match = isl_space_match(space, isl_dim_param, pa_space, isl_dim_param);
5169 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
5170 "parameters don't match", goto error);
5171 match = isl_space_tuple_match(space, isl_dim_in, pa_space, isl_dim_in);
5175 isl_die(isl_pw_aff_get_ctx(pa), isl_error_invalid,
5176 "domains don't match", goto error);
5177 isl_space_free(pa_space);
5180 isl_space_free(pa_space);
5187 #include <isl_multi_templ.c>
5189 /* Scale the first elements of "ma" by the corresponding elements of "vec".
5191 __isl_give isl_multi_aff *isl_multi_aff_scale_vec(__isl_take isl_multi_aff *ma,
5192 __isl_take isl_vec *vec)
5200 n = isl_multi_aff_dim(ma, isl_dim_out);
5201 if (isl_vec_size(vec) < n)
5202 n = isl_vec_size(vec);
5205 for (i = 0; i < n; ++i) {
5208 isl_vec_get_element(vec, i, &v);
5210 aff = isl_multi_aff_get_aff(ma, i);
5211 aff = isl_aff_scale(aff, v);
5212 ma = isl_multi_aff_set_aff(ma, i, aff);
5220 isl_multi_aff_free(ma);
5224 /* Scale the first elements of "pma" by the corresponding elements of "vec".
5226 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_scale_vec(
5227 __isl_take isl_pw_multi_aff *pma, __isl_take isl_vec *v)
5231 pma = isl_pw_multi_aff_cow(pma);
5235 for (i = 0; i < pma->n; ++i) {
5236 pma->p[i].maff = isl_multi_aff_scale_vec(pma->p[i].maff,
5238 if (!pma->p[i].maff)
5246 isl_pw_multi_aff_free(pma);
5250 /* This function is called for each entry of an isl_union_pw_multi_aff.
5251 * Replace the entry by the result of applying isl_pw_multi_aff_scale_vec
5252 * to the original entry with the isl_vec in "user" as extra argument.
5254 static int union_pw_multi_aff_scale_vec_entry(void **entry, void *user)
5256 isl_pw_multi_aff **pma = (isl_pw_multi_aff **) entry;
5259 *pma = isl_pw_multi_aff_scale_vec(*pma, isl_vec_copy(v));
5266 /* Scale the first elements of "upma" by the corresponding elements of "vec".
5268 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_scale_vec(
5269 __isl_take isl_union_pw_multi_aff *upma, __isl_take isl_vec *v)
5271 upma = isl_union_pw_multi_aff_cow(upma);
5275 if (isl_hash_table_foreach(upma->dim->ctx, &upma->table,
5276 &union_pw_multi_aff_scale_vec_entry, v) < 0)
5283 isl_union_pw_multi_aff_free(upma);