2 * Copyright 2011 INRIA Saclay
3 * Copyright 2011 Sven Verdoolaege
4 * Copyright 2012 Ecole Normale Superieure
6 * Use of this software is governed by the GNU LGPLv2.1 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_list_private.h>
23 #include <isl/constraint.h>
26 #include <isl_config.h>
28 __isl_give isl_aff *isl_aff_alloc_vec(__isl_take isl_local_space *ls,
29 __isl_take isl_vec *v)
36 aff = isl_calloc_type(v->ctx, struct isl_aff);
46 isl_local_space_free(ls);
51 __isl_give isl_aff *isl_aff_alloc(__isl_take isl_local_space *ls)
60 ctx = isl_local_space_get_ctx(ls);
61 if (!isl_local_space_divs_known(ls))
62 isl_die(ctx, isl_error_invalid, "local space has unknown divs",
64 if (!isl_local_space_is_set(ls))
65 isl_die(ctx, isl_error_invalid,
66 "domain of affine expression should be a set",
69 total = isl_local_space_dim(ls, isl_dim_all);
70 v = isl_vec_alloc(ctx, 1 + 1 + total);
71 return isl_aff_alloc_vec(ls, v);
73 isl_local_space_free(ls);
77 __isl_give isl_aff *isl_aff_zero_on_domain(__isl_take isl_local_space *ls)
81 aff = isl_aff_alloc(ls);
85 isl_int_set_si(aff->v->el[0], 1);
86 isl_seq_clr(aff->v->el + 1, aff->v->size - 1);
91 __isl_give isl_aff *isl_aff_copy(__isl_keep isl_aff *aff)
100 __isl_give isl_aff *isl_aff_dup(__isl_keep isl_aff *aff)
105 return isl_aff_alloc_vec(isl_local_space_copy(aff->ls),
106 isl_vec_copy(aff->v));
109 __isl_give isl_aff *isl_aff_cow(__isl_take isl_aff *aff)
117 return isl_aff_dup(aff);
120 void *isl_aff_free(__isl_take isl_aff *aff)
128 isl_local_space_free(aff->ls);
129 isl_vec_free(aff->v);
136 isl_ctx *isl_aff_get_ctx(__isl_keep isl_aff *aff)
138 return aff ? isl_local_space_get_ctx(aff->ls) : NULL;
141 /* Externally, an isl_aff has a map space, but internally, the
142 * ls field corresponds to the domain of that space.
144 int isl_aff_dim(__isl_keep isl_aff *aff, enum isl_dim_type type)
148 if (type == isl_dim_out)
150 if (type == isl_dim_in)
152 return isl_local_space_dim(aff->ls, type);
155 __isl_give isl_space *isl_aff_get_domain_space(__isl_keep isl_aff *aff)
157 return aff ? isl_local_space_get_space(aff->ls) : NULL;
160 __isl_give isl_space *isl_aff_get_space(__isl_keep isl_aff *aff)
165 space = isl_local_space_get_space(aff->ls);
166 space = isl_space_from_domain(space);
167 space = isl_space_add_dims(space, isl_dim_out, 1);
171 __isl_give isl_local_space *isl_aff_get_domain_local_space(
172 __isl_keep isl_aff *aff)
174 return aff ? isl_local_space_copy(aff->ls) : NULL;
177 __isl_give isl_local_space *isl_aff_get_local_space(__isl_keep isl_aff *aff)
182 ls = isl_local_space_copy(aff->ls);
183 ls = isl_local_space_from_domain(ls);
184 ls = isl_local_space_add_dims(ls, isl_dim_out, 1);
188 /* Externally, an isl_aff has a map space, but internally, the
189 * ls field corresponds to the domain of that space.
191 const char *isl_aff_get_dim_name(__isl_keep isl_aff *aff,
192 enum isl_dim_type type, unsigned pos)
196 if (type == isl_dim_out)
198 if (type == isl_dim_in)
200 return isl_local_space_get_dim_name(aff->ls, type, pos);
203 __isl_give isl_aff *isl_aff_reset_domain_space(__isl_take isl_aff *aff,
204 __isl_take isl_space *dim)
206 aff = isl_aff_cow(aff);
210 aff->ls = isl_local_space_reset_space(aff->ls, dim);
212 return isl_aff_free(aff);
221 /* Reset the space of "aff". This function is called from isl_pw_templ.c
222 * and doesn't know if the space of an element object is represented
223 * directly or through its domain. It therefore passes along both.
225 __isl_give isl_aff *isl_aff_reset_space_and_domain(__isl_take isl_aff *aff,
226 __isl_take isl_space *space, __isl_take isl_space *domain)
228 isl_space_free(space);
229 return isl_aff_reset_domain_space(aff, domain);
232 /* Reorder the coefficients of the affine expression based
233 * on the given reodering.
234 * The reordering r is assumed to have been extended with the local
237 static __isl_give isl_vec *vec_reorder(__isl_take isl_vec *vec,
238 __isl_take isl_reordering *r, int n_div)
246 res = isl_vec_alloc(vec->ctx,
247 2 + isl_space_dim(r->dim, isl_dim_all) + n_div);
248 isl_seq_cpy(res->el, vec->el, 2);
249 isl_seq_clr(res->el + 2, res->size - 2);
250 for (i = 0; i < r->len; ++i)
251 isl_int_set(res->el[2 + r->pos[i]], vec->el[2 + i]);
253 isl_reordering_free(r);
258 isl_reordering_free(r);
262 /* Reorder the dimensions of the domain of "aff" according
263 * to the given reordering.
265 __isl_give isl_aff *isl_aff_realign_domain(__isl_take isl_aff *aff,
266 __isl_take isl_reordering *r)
268 aff = isl_aff_cow(aff);
272 r = isl_reordering_extend(r, aff->ls->div->n_row);
273 aff->v = vec_reorder(aff->v, isl_reordering_copy(r),
274 aff->ls->div->n_row);
275 aff->ls = isl_local_space_realign(aff->ls, r);
277 if (!aff->v || !aff->ls)
278 return isl_aff_free(aff);
283 isl_reordering_free(r);
287 __isl_give isl_aff *isl_aff_align_params(__isl_take isl_aff *aff,
288 __isl_take isl_space *model)
293 if (!isl_space_match(aff->ls->dim, isl_dim_param,
294 model, isl_dim_param)) {
297 model = isl_space_drop_dims(model, isl_dim_in,
298 0, isl_space_dim(model, isl_dim_in));
299 model = isl_space_drop_dims(model, isl_dim_out,
300 0, isl_space_dim(model, isl_dim_out));
301 exp = isl_parameter_alignment_reordering(aff->ls->dim, model);
302 exp = isl_reordering_extend_space(exp,
303 isl_aff_get_domain_space(aff));
304 aff = isl_aff_realign_domain(aff, exp);
307 isl_space_free(model);
310 isl_space_free(model);
315 int isl_aff_plain_is_zero(__isl_keep isl_aff *aff)
320 return isl_seq_first_non_zero(aff->v->el + 1, aff->v->size - 1) < 0;
323 int isl_aff_plain_is_equal(__isl_keep isl_aff *aff1, __isl_keep isl_aff *aff2)
330 equal = isl_local_space_is_equal(aff1->ls, aff2->ls);
331 if (equal < 0 || !equal)
334 return isl_vec_is_equal(aff1->v, aff2->v);
337 int isl_aff_get_denominator(__isl_keep isl_aff *aff, isl_int *v)
341 isl_int_set(*v, aff->v->el[0]);
345 int isl_aff_get_constant(__isl_keep isl_aff *aff, isl_int *v)
349 isl_int_set(*v, aff->v->el[1]);
353 int isl_aff_get_coefficient(__isl_keep isl_aff *aff,
354 enum isl_dim_type type, int pos, isl_int *v)
359 if (type == isl_dim_out)
360 isl_die(aff->v->ctx, isl_error_invalid,
361 "output/set dimension does not have a coefficient",
363 if (type == isl_dim_in)
366 if (pos >= isl_local_space_dim(aff->ls, type))
367 isl_die(aff->v->ctx, isl_error_invalid,
368 "position out of bounds", return -1);
370 pos += isl_local_space_offset(aff->ls, type);
371 isl_int_set(*v, aff->v->el[1 + pos]);
376 __isl_give isl_aff *isl_aff_set_denominator(__isl_take isl_aff *aff, isl_int v)
378 aff = isl_aff_cow(aff);
382 aff->v = isl_vec_cow(aff->v);
384 return isl_aff_free(aff);
386 isl_int_set(aff->v->el[0], v);
391 __isl_give isl_aff *isl_aff_set_constant(__isl_take isl_aff *aff, isl_int v)
393 aff = isl_aff_cow(aff);
397 aff->v = isl_vec_cow(aff->v);
399 return isl_aff_free(aff);
401 isl_int_set(aff->v->el[1], v);
406 __isl_give isl_aff *isl_aff_add_constant(__isl_take isl_aff *aff, isl_int v)
408 if (isl_int_is_zero(v))
411 aff = isl_aff_cow(aff);
415 aff->v = isl_vec_cow(aff->v);
417 return isl_aff_free(aff);
419 isl_int_addmul(aff->v->el[1], aff->v->el[0], v);
424 __isl_give isl_aff *isl_aff_add_constant_si(__isl_take isl_aff *aff, int v)
429 isl_int_set_si(t, v);
430 aff = isl_aff_add_constant(aff, t);
436 __isl_give isl_aff *isl_aff_set_constant_si(__isl_take isl_aff *aff, int v)
438 aff = isl_aff_cow(aff);
442 aff->v = isl_vec_cow(aff->v);
444 return isl_aff_free(aff);
446 isl_int_set_si(aff->v->el[1], v);
451 __isl_give isl_aff *isl_aff_set_coefficient(__isl_take isl_aff *aff,
452 enum isl_dim_type type, int pos, isl_int v)
457 if (type == isl_dim_out)
458 isl_die(aff->v->ctx, isl_error_invalid,
459 "output/set dimension does not have a coefficient",
460 return isl_aff_free(aff));
461 if (type == isl_dim_in)
464 if (pos >= isl_local_space_dim(aff->ls, type))
465 isl_die(aff->v->ctx, isl_error_invalid,
466 "position out of bounds", return isl_aff_free(aff));
468 aff = isl_aff_cow(aff);
472 aff->v = isl_vec_cow(aff->v);
474 return isl_aff_free(aff);
476 pos += isl_local_space_offset(aff->ls, type);
477 isl_int_set(aff->v->el[1 + pos], v);
482 __isl_give isl_aff *isl_aff_set_coefficient_si(__isl_take isl_aff *aff,
483 enum isl_dim_type type, int pos, int v)
488 if (type == isl_dim_out)
489 isl_die(aff->v->ctx, isl_error_invalid,
490 "output/set dimension does not have a coefficient",
491 return isl_aff_free(aff));
492 if (type == isl_dim_in)
495 if (pos >= isl_local_space_dim(aff->ls, type))
496 isl_die(aff->v->ctx, isl_error_invalid,
497 "position out of bounds", return isl_aff_free(aff));
499 aff = isl_aff_cow(aff);
503 aff->v = isl_vec_cow(aff->v);
505 return isl_aff_free(aff);
507 pos += isl_local_space_offset(aff->ls, type);
508 isl_int_set_si(aff->v->el[1 + pos], v);
513 __isl_give isl_aff *isl_aff_add_coefficient(__isl_take isl_aff *aff,
514 enum isl_dim_type type, int pos, isl_int v)
519 if (type == isl_dim_out)
520 isl_die(aff->v->ctx, isl_error_invalid,
521 "output/set dimension does not have a coefficient",
522 return isl_aff_free(aff));
523 if (type == isl_dim_in)
526 if (pos >= isl_local_space_dim(aff->ls, type))
527 isl_die(aff->v->ctx, isl_error_invalid,
528 "position out of bounds", return isl_aff_free(aff));
530 aff = isl_aff_cow(aff);
534 aff->v = isl_vec_cow(aff->v);
536 return isl_aff_free(aff);
538 pos += isl_local_space_offset(aff->ls, type);
539 isl_int_addmul(aff->v->el[1 + pos], aff->v->el[0], v);
544 __isl_give isl_aff *isl_aff_add_coefficient_si(__isl_take isl_aff *aff,
545 enum isl_dim_type type, int pos, int v)
550 isl_int_set_si(t, v);
551 aff = isl_aff_add_coefficient(aff, type, pos, t);
557 __isl_give isl_aff *isl_aff_get_div(__isl_keep isl_aff *aff, int pos)
562 return isl_local_space_get_div(aff->ls, pos);
565 __isl_give isl_aff *isl_aff_neg(__isl_take isl_aff *aff)
567 aff = isl_aff_cow(aff);
570 aff->v = isl_vec_cow(aff->v);
572 return isl_aff_free(aff);
574 isl_seq_neg(aff->v->el + 1, aff->v->el + 1, aff->v->size - 1);
579 /* Remove divs from the local space that do not appear in the affine
581 * We currently only remove divs at the end.
582 * Some intermediate divs may also not appear directly in the affine
583 * expression, but we would also need to check that no other divs are
584 * defined in terms of them.
586 __isl_give isl_aff *isl_aff_remove_unused_divs( __isl_take isl_aff *aff)
595 n = isl_local_space_dim(aff->ls, isl_dim_div);
596 off = isl_local_space_offset(aff->ls, isl_dim_div);
598 pos = isl_seq_last_non_zero(aff->v->el + 1 + off, n) + 1;
602 aff = isl_aff_cow(aff);
606 aff->ls = isl_local_space_drop_dims(aff->ls, isl_dim_div, pos, n - pos);
607 aff->v = isl_vec_drop_els(aff->v, 1 + off + pos, n - pos);
608 if (!aff->ls || !aff->v)
609 return isl_aff_free(aff);
614 __isl_give isl_aff *isl_aff_normalize(__isl_take isl_aff *aff)
618 aff->v = isl_vec_normalize(aff->v);
620 return isl_aff_free(aff);
621 aff = isl_aff_remove_unused_divs(aff);
625 /* Given f, return floor(f).
626 * If f is an integer expression, then just return f.
627 * Otherwise, if f = g/m, write g = q m + r,
628 * create a new div d = [r/m] and return the expression q + d.
629 * The coefficients in r are taken to lie between -m/2 and m/2.
631 __isl_give isl_aff *isl_aff_floor(__isl_take isl_aff *aff)
641 if (isl_int_is_one(aff->v->el[0]))
644 aff = isl_aff_cow(aff);
648 aff->v = isl_vec_cow(aff->v);
649 div = isl_vec_copy(aff->v);
650 div = isl_vec_cow(div);
652 return isl_aff_free(aff);
654 ctx = isl_aff_get_ctx(aff);
655 isl_int_fdiv_q(aff->v->el[0], aff->v->el[0], ctx->two);
656 for (i = 1; i < aff->v->size; ++i) {
657 isl_int_fdiv_r(div->el[i], div->el[i], div->el[0]);
658 isl_int_fdiv_q(aff->v->el[i], aff->v->el[i], div->el[0]);
659 if (isl_int_gt(div->el[i], aff->v->el[0])) {
660 isl_int_sub(div->el[i], div->el[i], div->el[0]);
661 isl_int_add_ui(aff->v->el[i], aff->v->el[i], 1);
665 aff->ls = isl_local_space_add_div(aff->ls, div);
667 return isl_aff_free(aff);
670 aff->v = isl_vec_extend(aff->v, size + 1);
672 return isl_aff_free(aff);
673 isl_int_set_si(aff->v->el[0], 1);
674 isl_int_set_si(aff->v->el[size], 1);
681 * aff mod m = aff - m * floor(aff/m)
683 __isl_give isl_aff *isl_aff_mod(__isl_take isl_aff *aff, isl_int m)
687 res = isl_aff_copy(aff);
688 aff = isl_aff_scale_down(aff, m);
689 aff = isl_aff_floor(aff);
690 aff = isl_aff_scale(aff, m);
691 res = isl_aff_sub(res, aff);
698 * pwaff mod m = pwaff - m * floor(pwaff/m)
700 __isl_give isl_pw_aff *isl_pw_aff_mod(__isl_take isl_pw_aff *pwaff, isl_int m)
704 res = isl_pw_aff_copy(pwaff);
705 pwaff = isl_pw_aff_scale_down(pwaff, m);
706 pwaff = isl_pw_aff_floor(pwaff);
707 pwaff = isl_pw_aff_scale(pwaff, m);
708 res = isl_pw_aff_sub(res, pwaff);
713 /* Given f, return ceil(f).
714 * If f is an integer expression, then just return f.
715 * Otherwise, create a new div d = [-f] and return the expression -d.
717 __isl_give isl_aff *isl_aff_ceil(__isl_take isl_aff *aff)
722 if (isl_int_is_one(aff->v->el[0]))
725 aff = isl_aff_neg(aff);
726 aff = isl_aff_floor(aff);
727 aff = isl_aff_neg(aff);
732 /* Apply the expansion computed by isl_merge_divs.
733 * The expansion itself is given by "exp" while the resulting
734 * list of divs is given by "div".
736 __isl_give isl_aff *isl_aff_expand_divs( __isl_take isl_aff *aff,
737 __isl_take isl_mat *div, int *exp)
744 aff = isl_aff_cow(aff);
748 old_n_div = isl_local_space_dim(aff->ls, isl_dim_div);
749 new_n_div = isl_mat_rows(div);
750 if (new_n_div < old_n_div)
751 isl_die(isl_mat_get_ctx(div), isl_error_invalid,
752 "not an expansion", goto error);
754 aff->v = isl_vec_extend(aff->v, aff->v->size + new_n_div - old_n_div);
758 offset = 1 + isl_local_space_offset(aff->ls, isl_dim_div);
760 for (i = new_n_div - 1; i >= 0; --i) {
761 if (j >= 0 && exp[j] == i) {
763 isl_int_swap(aff->v->el[offset + i],
764 aff->v->el[offset + j]);
767 isl_int_set_si(aff->v->el[offset + i], 0);
770 aff->ls = isl_local_space_replace_divs(aff->ls, isl_mat_copy(div));
781 /* Add two affine expressions that live in the same local space.
783 static __isl_give isl_aff *add_expanded(__isl_take isl_aff *aff1,
784 __isl_take isl_aff *aff2)
788 aff1 = isl_aff_cow(aff1);
792 aff1->v = isl_vec_cow(aff1->v);
798 isl_int_gcd(gcd, aff1->v->el[0], aff2->v->el[0]);
799 isl_int_divexact(f, aff2->v->el[0], gcd);
800 isl_seq_scale(aff1->v->el + 1, aff1->v->el + 1, f, aff1->v->size - 1);
801 isl_int_divexact(f, aff1->v->el[0], gcd);
802 isl_seq_addmul(aff1->v->el + 1, f, aff2->v->el + 1, aff1->v->size - 1);
803 isl_int_divexact(f, aff2->v->el[0], gcd);
804 isl_int_mul(aff1->v->el[0], aff1->v->el[0], f);
816 __isl_give isl_aff *isl_aff_add(__isl_take isl_aff *aff1,
817 __isl_take isl_aff *aff2)
827 ctx = isl_aff_get_ctx(aff1);
828 if (!isl_space_is_equal(aff1->ls->dim, aff2->ls->dim))
829 isl_die(ctx, isl_error_invalid,
830 "spaces don't match", goto error);
832 if (aff1->ls->div->n_row == 0 && aff2->ls->div->n_row == 0)
833 return add_expanded(aff1, aff2);
835 exp1 = isl_alloc_array(ctx, int, aff1->ls->div->n_row);
836 exp2 = isl_alloc_array(ctx, int, aff2->ls->div->n_row);
840 div = isl_merge_divs(aff1->ls->div, aff2->ls->div, exp1, exp2);
841 aff1 = isl_aff_expand_divs(aff1, isl_mat_copy(div), exp1);
842 aff2 = isl_aff_expand_divs(aff2, div, exp2);
846 return add_expanded(aff1, aff2);
855 __isl_give isl_aff *isl_aff_sub(__isl_take isl_aff *aff1,
856 __isl_take isl_aff *aff2)
858 return isl_aff_add(aff1, isl_aff_neg(aff2));
861 __isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff, isl_int f)
865 if (isl_int_is_one(f))
868 aff = isl_aff_cow(aff);
871 aff->v = isl_vec_cow(aff->v);
873 return isl_aff_free(aff);
876 isl_int_gcd(gcd, aff->v->el[0], f);
877 isl_int_divexact(aff->v->el[0], aff->v->el[0], gcd);
878 isl_int_divexact(gcd, f, gcd);
879 isl_seq_scale(aff->v->el + 1, aff->v->el + 1, gcd, aff->v->size - 1);
885 __isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff, isl_int f)
889 if (isl_int_is_one(f))
892 aff = isl_aff_cow(aff);
895 aff->v = isl_vec_cow(aff->v);
897 return isl_aff_free(aff);
900 isl_seq_gcd(aff->v->el + 1, aff->v->size - 1, &gcd);
901 isl_int_gcd(gcd, gcd, f);
902 isl_seq_scale_down(aff->v->el + 1, aff->v->el + 1, gcd, aff->v->size - 1);
903 isl_int_divexact(gcd, f, gcd);
904 isl_int_mul(aff->v->el[0], aff->v->el[0], gcd);
910 __isl_give isl_aff *isl_aff_scale_down_ui(__isl_take isl_aff *aff, unsigned f)
918 isl_int_set_ui(v, f);
919 aff = isl_aff_scale_down(aff, v);
925 __isl_give isl_aff *isl_aff_set_dim_name(__isl_take isl_aff *aff,
926 enum isl_dim_type type, unsigned pos, const char *s)
928 aff = isl_aff_cow(aff);
931 if (type == isl_dim_out)
932 isl_die(aff->v->ctx, isl_error_invalid,
933 "cannot set name of output/set dimension",
934 return isl_aff_free(aff));
935 if (type == isl_dim_in)
937 aff->ls = isl_local_space_set_dim_name(aff->ls, type, pos, s);
939 return isl_aff_free(aff);
944 __isl_give isl_aff *isl_aff_set_dim_id(__isl_take isl_aff *aff,
945 enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
947 aff = isl_aff_cow(aff);
949 return isl_id_free(id);
950 if (type == isl_dim_out)
951 isl_die(aff->v->ctx, isl_error_invalid,
952 "cannot set name of output/set dimension",
954 if (type == isl_dim_in)
956 aff->ls = isl_local_space_set_dim_id(aff->ls, type, pos, id);
958 return isl_aff_free(aff);
967 /* Exploit the equalities in "eq" to simplify the affine expression
968 * and the expressions of the integer divisions in the local space.
969 * The integer divisions in this local space are assumed to appear
970 * as regular dimensions in "eq".
972 static __isl_give isl_aff *isl_aff_substitute_equalities_lifted(
973 __isl_take isl_aff *aff, __isl_take isl_basic_set *eq)
982 isl_basic_set_free(eq);
986 aff = isl_aff_cow(aff);
990 aff->ls = isl_local_space_substitute_equalities(aff->ls,
991 isl_basic_set_copy(eq));
995 total = 1 + isl_space_dim(eq->dim, isl_dim_all);
997 for (i = 0; i < eq->n_eq; ++i) {
998 j = isl_seq_last_non_zero(eq->eq[i], total + n_div);
999 if (j < 0 || j == 0 || j >= total)
1002 isl_seq_elim(aff->v->el + 1, eq->eq[i], j, total,
1006 isl_basic_set_free(eq);
1007 aff = isl_aff_normalize(aff);
1010 isl_basic_set_free(eq);
1015 /* Exploit the equalities in "eq" to simplify the affine expression
1016 * and the expressions of the integer divisions in the local space.
1018 static __isl_give isl_aff *isl_aff_substitute_equalities(
1019 __isl_take isl_aff *aff, __isl_take isl_basic_set *eq)
1025 n_div = isl_local_space_dim(aff->ls, isl_dim_div);
1027 eq = isl_basic_set_add(eq, isl_dim_set, n_div);
1028 return isl_aff_substitute_equalities_lifted(aff, eq);
1030 isl_basic_set_free(eq);
1035 /* Look for equalities among the variables shared by context and aff
1036 * and the integer divisions of aff, if any.
1037 * The equalities are then used to eliminate coefficients and/or integer
1038 * divisions from aff.
1040 __isl_give isl_aff *isl_aff_gist(__isl_take isl_aff *aff,
1041 __isl_take isl_set *context)
1043 isl_basic_set *hull;
1048 n_div = isl_local_space_dim(aff->ls, isl_dim_div);
1050 isl_basic_set *bset;
1051 isl_local_space *ls;
1052 context = isl_set_add_dims(context, isl_dim_set, n_div);
1053 ls = isl_aff_get_domain_local_space(aff);
1054 bset = isl_basic_set_from_local_space(ls);
1055 bset = isl_basic_set_lift(bset);
1056 bset = isl_basic_set_flatten(bset);
1057 context = isl_set_intersect(context,
1058 isl_set_from_basic_set(bset));
1061 hull = isl_set_affine_hull(context);
1062 return isl_aff_substitute_equalities_lifted(aff, hull);
1065 isl_set_free(context);
1069 __isl_give isl_aff *isl_aff_gist_params(__isl_take isl_aff *aff,
1070 __isl_take isl_set *context)
1072 isl_set *dom_context = isl_set_universe(isl_aff_get_domain_space(aff));
1073 dom_context = isl_set_intersect_params(dom_context, context);
1074 return isl_aff_gist(aff, dom_context);
1077 /* Return a basic set containing those elements in the space
1078 * of aff where it is non-negative.
1080 __isl_give isl_basic_set *isl_aff_nonneg_basic_set(__isl_take isl_aff *aff)
1082 isl_constraint *ineq;
1083 isl_basic_set *bset;
1085 ineq = isl_inequality_from_aff(aff);
1087 bset = isl_basic_set_from_constraint(ineq);
1088 bset = isl_basic_set_simplify(bset);
1092 /* Return a basic set containing those elements in the space
1093 * of aff where it is zero.
1095 __isl_give isl_basic_set *isl_aff_zero_basic_set(__isl_take isl_aff *aff)
1097 isl_constraint *ineq;
1098 isl_basic_set *bset;
1100 ineq = isl_equality_from_aff(aff);
1102 bset = isl_basic_set_from_constraint(ineq);
1103 bset = isl_basic_set_simplify(bset);
1107 /* Return a basic set containing those elements in the shared space
1108 * of aff1 and aff2 where aff1 is greater than or equal to aff2.
1110 __isl_give isl_basic_set *isl_aff_ge_basic_set(__isl_take isl_aff *aff1,
1111 __isl_take isl_aff *aff2)
1113 aff1 = isl_aff_sub(aff1, aff2);
1115 return isl_aff_nonneg_basic_set(aff1);
1118 /* Return a basic set containing those elements in the shared space
1119 * of aff1 and aff2 where aff1 is smaller than or equal to aff2.
1121 __isl_give isl_basic_set *isl_aff_le_basic_set(__isl_take isl_aff *aff1,
1122 __isl_take isl_aff *aff2)
1124 return isl_aff_ge_basic_set(aff2, aff1);
1127 __isl_give isl_aff *isl_aff_add_on_domain(__isl_keep isl_set *dom,
1128 __isl_take isl_aff *aff1, __isl_take isl_aff *aff2)
1130 aff1 = isl_aff_add(aff1, aff2);
1131 aff1 = isl_aff_gist(aff1, isl_set_copy(dom));
1135 int isl_aff_is_empty(__isl_keep isl_aff *aff)
1143 /* Check whether the given affine expression has non-zero coefficient
1144 * for any dimension in the given range or if any of these dimensions
1145 * appear with non-zero coefficients in any of the integer divisions
1146 * involved in the affine expression.
1148 int isl_aff_involves_dims(__isl_keep isl_aff *aff,
1149 enum isl_dim_type type, unsigned first, unsigned n)
1161 ctx = isl_aff_get_ctx(aff);
1162 if (first + n > isl_aff_dim(aff, type))
1163 isl_die(ctx, isl_error_invalid,
1164 "range out of bounds", return -1);
1166 active = isl_local_space_get_active(aff->ls, aff->v->el + 2);
1170 first += isl_local_space_offset(aff->ls, type) - 1;
1171 for (i = 0; i < n; ++i)
1172 if (active[first + i]) {
1185 __isl_give isl_aff *isl_aff_drop_dims(__isl_take isl_aff *aff,
1186 enum isl_dim_type type, unsigned first, unsigned n)
1192 if (type == isl_dim_out)
1193 isl_die(aff->v->ctx, isl_error_invalid,
1194 "cannot drop output/set dimension",
1195 return isl_aff_free(aff));
1196 if (type == isl_dim_in)
1198 if (n == 0 && !isl_local_space_is_named_or_nested(aff->ls, type))
1201 ctx = isl_aff_get_ctx(aff);
1202 if (first + n > isl_local_space_dim(aff->ls, type))
1203 isl_die(ctx, isl_error_invalid, "range out of bounds",
1204 return isl_aff_free(aff));
1206 aff = isl_aff_cow(aff);
1210 aff->ls = isl_local_space_drop_dims(aff->ls, type, first, n);
1212 return isl_aff_free(aff);
1214 first += 1 + isl_local_space_offset(aff->ls, type);
1215 aff->v = isl_vec_drop_els(aff->v, first, n);
1217 return isl_aff_free(aff);
1222 /* Project the domain of the affine expression onto its parameter space.
1223 * The affine expression may not involve any of the domain dimensions.
1225 __isl_give isl_aff *isl_aff_project_domain_on_params(__isl_take isl_aff *aff)
1231 n = isl_aff_dim(aff, isl_dim_in);
1232 involves = isl_aff_involves_dims(aff, isl_dim_in, 0, n);
1234 return isl_aff_free(aff);
1236 isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
1237 "affine expression involves some of the domain dimensions",
1238 return isl_aff_free(aff));
1239 aff = isl_aff_drop_dims(aff, isl_dim_in, 0, n);
1240 space = isl_aff_get_domain_space(aff);
1241 space = isl_space_params(space);
1242 aff = isl_aff_reset_domain_space(aff, space);
1246 __isl_give isl_aff *isl_aff_insert_dims(__isl_take isl_aff *aff,
1247 enum isl_dim_type type, unsigned first, unsigned n)
1253 if (type == isl_dim_out)
1254 isl_die(aff->v->ctx, isl_error_invalid,
1255 "cannot insert output/set dimensions",
1256 return isl_aff_free(aff));
1257 if (type == isl_dim_in)
1259 if (n == 0 && !isl_local_space_is_named_or_nested(aff->ls, type))
1262 ctx = isl_aff_get_ctx(aff);
1263 if (first > isl_local_space_dim(aff->ls, type))
1264 isl_die(ctx, isl_error_invalid, "position out of bounds",
1265 return isl_aff_free(aff));
1267 aff = isl_aff_cow(aff);
1271 aff->ls = isl_local_space_insert_dims(aff->ls, type, first, n);
1273 return isl_aff_free(aff);
1275 first += 1 + isl_local_space_offset(aff->ls, type);
1276 aff->v = isl_vec_insert_zero_els(aff->v, first, n);
1278 return isl_aff_free(aff);
1283 __isl_give isl_aff *isl_aff_add_dims(__isl_take isl_aff *aff,
1284 enum isl_dim_type type, unsigned n)
1288 pos = isl_aff_dim(aff, type);
1290 return isl_aff_insert_dims(aff, type, pos, n);
1293 __isl_give isl_pw_aff *isl_pw_aff_add_dims(__isl_take isl_pw_aff *pwaff,
1294 enum isl_dim_type type, unsigned n)
1298 pos = isl_pw_aff_dim(pwaff, type);
1300 return isl_pw_aff_insert_dims(pwaff, type, pos, n);
1303 __isl_give isl_pw_aff *isl_pw_aff_from_aff(__isl_take isl_aff *aff)
1305 isl_set *dom = isl_set_universe(isl_aff_get_domain_space(aff));
1306 return isl_pw_aff_alloc(dom, aff);
1310 #define PW isl_pw_aff
1314 #define EL_IS_ZERO is_empty
1318 #define IS_ZERO is_empty
1321 #undef DEFAULT_IS_ZERO
1322 #define DEFAULT_IS_ZERO 0
1326 #define NO_MOVE_DIMS
1330 #include <isl_pw_templ.c>
1332 static __isl_give isl_set *align_params_pw_pw_set_and(
1333 __isl_take isl_pw_aff *pwaff1, __isl_take isl_pw_aff *pwaff2,
1334 __isl_give isl_set *(*fn)(__isl_take isl_pw_aff *pwaff1,
1335 __isl_take isl_pw_aff *pwaff2))
1337 if (!pwaff1 || !pwaff2)
1339 if (isl_space_match(pwaff1->dim, isl_dim_param,
1340 pwaff2->dim, isl_dim_param))
1341 return fn(pwaff1, pwaff2);
1342 if (!isl_space_has_named_params(pwaff1->dim) ||
1343 !isl_space_has_named_params(pwaff2->dim))
1344 isl_die(isl_pw_aff_get_ctx(pwaff1), isl_error_invalid,
1345 "unaligned unnamed parameters", goto error);
1346 pwaff1 = isl_pw_aff_align_params(pwaff1, isl_pw_aff_get_space(pwaff2));
1347 pwaff2 = isl_pw_aff_align_params(pwaff2, isl_pw_aff_get_space(pwaff1));
1348 return fn(pwaff1, pwaff2);
1350 isl_pw_aff_free(pwaff1);
1351 isl_pw_aff_free(pwaff2);
1355 /* Compute a piecewise quasi-affine expression with a domain that
1356 * is the union of those of pwaff1 and pwaff2 and such that on each
1357 * cell, the quasi-affine expression is the better (according to cmp)
1358 * of those of pwaff1 and pwaff2. If only one of pwaff1 or pwaff2
1359 * is defined on a given cell, then the associated expression
1360 * is the defined one.
1362 static __isl_give isl_pw_aff *pw_aff_union_opt(__isl_take isl_pw_aff *pwaff1,
1363 __isl_take isl_pw_aff *pwaff2,
1364 __isl_give isl_basic_set *(*cmp)(__isl_take isl_aff *aff1,
1365 __isl_take isl_aff *aff2))
1372 if (!pwaff1 || !pwaff2)
1375 ctx = isl_space_get_ctx(pwaff1->dim);
1376 if (!isl_space_is_equal(pwaff1->dim, pwaff2->dim))
1377 isl_die(ctx, isl_error_invalid,
1378 "arguments should live in same space", goto error);
1380 if (isl_pw_aff_is_empty(pwaff1)) {
1381 isl_pw_aff_free(pwaff1);
1385 if (isl_pw_aff_is_empty(pwaff2)) {
1386 isl_pw_aff_free(pwaff2);
1390 n = 2 * (pwaff1->n + 1) * (pwaff2->n + 1);
1391 res = isl_pw_aff_alloc_size(isl_space_copy(pwaff1->dim), n);
1393 for (i = 0; i < pwaff1->n; ++i) {
1394 set = isl_set_copy(pwaff1->p[i].set);
1395 for (j = 0; j < pwaff2->n; ++j) {
1396 struct isl_set *common;
1399 common = isl_set_intersect(
1400 isl_set_copy(pwaff1->p[i].set),
1401 isl_set_copy(pwaff2->p[j].set));
1402 better = isl_set_from_basic_set(cmp(
1403 isl_aff_copy(pwaff2->p[j].aff),
1404 isl_aff_copy(pwaff1->p[i].aff)));
1405 better = isl_set_intersect(common, better);
1406 if (isl_set_plain_is_empty(better)) {
1407 isl_set_free(better);
1410 set = isl_set_subtract(set, isl_set_copy(better));
1412 res = isl_pw_aff_add_piece(res, better,
1413 isl_aff_copy(pwaff2->p[j].aff));
1415 res = isl_pw_aff_add_piece(res, set,
1416 isl_aff_copy(pwaff1->p[i].aff));
1419 for (j = 0; j < pwaff2->n; ++j) {
1420 set = isl_set_copy(pwaff2->p[j].set);
1421 for (i = 0; i < pwaff1->n; ++i)
1422 set = isl_set_subtract(set,
1423 isl_set_copy(pwaff1->p[i].set));
1424 res = isl_pw_aff_add_piece(res, set,
1425 isl_aff_copy(pwaff2->p[j].aff));
1428 isl_pw_aff_free(pwaff1);
1429 isl_pw_aff_free(pwaff2);
1433 isl_pw_aff_free(pwaff1);
1434 isl_pw_aff_free(pwaff2);
1438 /* Compute a piecewise quasi-affine expression with a domain that
1439 * is the union of those of pwaff1 and pwaff2 and such that on each
1440 * cell, the quasi-affine expression is the maximum of those of pwaff1
1441 * and pwaff2. If only one of pwaff1 or pwaff2 is defined on a given
1442 * cell, then the associated expression is the defined one.
1444 static __isl_give isl_pw_aff *pw_aff_union_max(__isl_take isl_pw_aff *pwaff1,
1445 __isl_take isl_pw_aff *pwaff2)
1447 return pw_aff_union_opt(pwaff1, pwaff2, &isl_aff_ge_basic_set);
1450 __isl_give isl_pw_aff *isl_pw_aff_union_max(__isl_take isl_pw_aff *pwaff1,
1451 __isl_take isl_pw_aff *pwaff2)
1453 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2,
1457 /* Compute a piecewise quasi-affine expression with a domain that
1458 * is the union of those of pwaff1 and pwaff2 and such that on each
1459 * cell, the quasi-affine expression is the minimum of those of pwaff1
1460 * and pwaff2. If only one of pwaff1 or pwaff2 is defined on a given
1461 * cell, then the associated expression is the defined one.
1463 static __isl_give isl_pw_aff *pw_aff_union_min(__isl_take isl_pw_aff *pwaff1,
1464 __isl_take isl_pw_aff *pwaff2)
1466 return pw_aff_union_opt(pwaff1, pwaff2, &isl_aff_le_basic_set);
1469 __isl_give isl_pw_aff *isl_pw_aff_union_min(__isl_take isl_pw_aff *pwaff1,
1470 __isl_take isl_pw_aff *pwaff2)
1472 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2,
1476 __isl_give isl_pw_aff *isl_pw_aff_union_opt(__isl_take isl_pw_aff *pwaff1,
1477 __isl_take isl_pw_aff *pwaff2, int max)
1480 return isl_pw_aff_union_max(pwaff1, pwaff2);
1482 return isl_pw_aff_union_min(pwaff1, pwaff2);
1485 /* Construct a map with as domain the domain of pwaff and
1486 * one-dimensional range corresponding to the affine expressions.
1488 static __isl_give isl_map *map_from_pw_aff(__isl_take isl_pw_aff *pwaff)
1497 dim = isl_pw_aff_get_space(pwaff);
1498 map = isl_map_empty(dim);
1500 for (i = 0; i < pwaff->n; ++i) {
1501 isl_basic_map *bmap;
1504 bmap = isl_basic_map_from_aff(isl_aff_copy(pwaff->p[i].aff));
1505 map_i = isl_map_from_basic_map(bmap);
1506 map_i = isl_map_intersect_domain(map_i,
1507 isl_set_copy(pwaff->p[i].set));
1508 map = isl_map_union_disjoint(map, map_i);
1511 isl_pw_aff_free(pwaff);
1516 /* Construct a map with as domain the domain of pwaff and
1517 * one-dimensional range corresponding to the affine expressions.
1519 __isl_give isl_map *isl_map_from_pw_aff(__isl_take isl_pw_aff *pwaff)
1523 if (isl_space_is_set(pwaff->dim))
1524 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
1525 "space of input is not a map",
1526 return isl_pw_aff_free(pwaff));
1527 return map_from_pw_aff(pwaff);
1530 /* Construct a one-dimensional set with as parameter domain
1531 * the domain of pwaff and the single set dimension
1532 * corresponding to the affine expressions.
1534 __isl_give isl_set *isl_set_from_pw_aff(__isl_take isl_pw_aff *pwaff)
1538 if (!isl_space_is_set(pwaff->dim))
1539 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
1540 "space of input is not a set",
1541 return isl_pw_aff_free(pwaff));
1542 return map_from_pw_aff(pwaff);
1545 /* Return a set containing those elements in the domain
1546 * of pwaff where it is non-negative.
1548 __isl_give isl_set *isl_pw_aff_nonneg_set(__isl_take isl_pw_aff *pwaff)
1556 set = isl_set_empty(isl_pw_aff_get_domain_space(pwaff));
1558 for (i = 0; i < pwaff->n; ++i) {
1559 isl_basic_set *bset;
1562 bset = isl_aff_nonneg_basic_set(isl_aff_copy(pwaff->p[i].aff));
1563 set_i = isl_set_from_basic_set(bset);
1564 set_i = isl_set_intersect(set_i, isl_set_copy(pwaff->p[i].set));
1565 set = isl_set_union_disjoint(set, set_i);
1568 isl_pw_aff_free(pwaff);
1573 /* Return a set containing those elements in the domain
1574 * of pwaff where it is zero (if complement is 0) or not zero
1575 * (if complement is 1).
1577 static __isl_give isl_set *pw_aff_zero_set(__isl_take isl_pw_aff *pwaff,
1586 set = isl_set_empty(isl_pw_aff_get_domain_space(pwaff));
1588 for (i = 0; i < pwaff->n; ++i) {
1589 isl_basic_set *bset;
1590 isl_set *set_i, *zero;
1592 bset = isl_aff_zero_basic_set(isl_aff_copy(pwaff->p[i].aff));
1593 zero = isl_set_from_basic_set(bset);
1594 set_i = isl_set_copy(pwaff->p[i].set);
1596 set_i = isl_set_subtract(set_i, zero);
1598 set_i = isl_set_intersect(set_i, zero);
1599 set = isl_set_union_disjoint(set, set_i);
1602 isl_pw_aff_free(pwaff);
1607 /* Return a set containing those elements in the domain
1608 * of pwaff where it is zero.
1610 __isl_give isl_set *isl_pw_aff_zero_set(__isl_take isl_pw_aff *pwaff)
1612 return pw_aff_zero_set(pwaff, 0);
1615 /* Return a set containing those elements in the domain
1616 * of pwaff where it is not zero.
1618 __isl_give isl_set *isl_pw_aff_non_zero_set(__isl_take isl_pw_aff *pwaff)
1620 return pw_aff_zero_set(pwaff, 1);
1623 /* Return a set containing those elements in the shared domain
1624 * of pwaff1 and pwaff2 where pwaff1 is greater than (or equal) to pwaff2.
1626 * We compute the difference on the shared domain and then construct
1627 * the set of values where this difference is non-negative.
1628 * If strict is set, we first subtract 1 from the difference.
1629 * If equal is set, we only return the elements where pwaff1 and pwaff2
1632 static __isl_give isl_set *pw_aff_gte_set(__isl_take isl_pw_aff *pwaff1,
1633 __isl_take isl_pw_aff *pwaff2, int strict, int equal)
1635 isl_set *set1, *set2;
1637 set1 = isl_pw_aff_domain(isl_pw_aff_copy(pwaff1));
1638 set2 = isl_pw_aff_domain(isl_pw_aff_copy(pwaff2));
1639 set1 = isl_set_intersect(set1, set2);
1640 pwaff1 = isl_pw_aff_intersect_domain(pwaff1, isl_set_copy(set1));
1641 pwaff2 = isl_pw_aff_intersect_domain(pwaff2, isl_set_copy(set1));
1642 pwaff1 = isl_pw_aff_add(pwaff1, isl_pw_aff_neg(pwaff2));
1645 isl_space *dim = isl_set_get_space(set1);
1647 aff = isl_aff_zero_on_domain(isl_local_space_from_space(dim));
1648 aff = isl_aff_add_constant_si(aff, -1);
1649 pwaff1 = isl_pw_aff_add(pwaff1, isl_pw_aff_alloc(set1, aff));
1654 return isl_pw_aff_zero_set(pwaff1);
1655 return isl_pw_aff_nonneg_set(pwaff1);
1658 /* Return a set containing those elements in the shared domain
1659 * of pwaff1 and pwaff2 where pwaff1 is equal to pwaff2.
1661 static __isl_give isl_set *pw_aff_eq_set(__isl_take isl_pw_aff *pwaff1,
1662 __isl_take isl_pw_aff *pwaff2)
1664 return pw_aff_gte_set(pwaff1, pwaff2, 0, 1);
1667 __isl_give isl_set *isl_pw_aff_eq_set(__isl_take isl_pw_aff *pwaff1,
1668 __isl_take isl_pw_aff *pwaff2)
1670 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_eq_set);
1673 /* Return a set containing those elements in the shared domain
1674 * of pwaff1 and pwaff2 where pwaff1 is greater than or equal to pwaff2.
1676 static __isl_give isl_set *pw_aff_ge_set(__isl_take isl_pw_aff *pwaff1,
1677 __isl_take isl_pw_aff *pwaff2)
1679 return pw_aff_gte_set(pwaff1, pwaff2, 0, 0);
1682 __isl_give isl_set *isl_pw_aff_ge_set(__isl_take isl_pw_aff *pwaff1,
1683 __isl_take isl_pw_aff *pwaff2)
1685 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_ge_set);
1688 /* Return a set containing those elements in the shared domain
1689 * of pwaff1 and pwaff2 where pwaff1 is strictly greater than pwaff2.
1691 static __isl_give isl_set *pw_aff_gt_set(__isl_take isl_pw_aff *pwaff1,
1692 __isl_take isl_pw_aff *pwaff2)
1694 return pw_aff_gte_set(pwaff1, pwaff2, 1, 0);
1697 __isl_give isl_set *isl_pw_aff_gt_set(__isl_take isl_pw_aff *pwaff1,
1698 __isl_take isl_pw_aff *pwaff2)
1700 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_gt_set);
1703 __isl_give isl_set *isl_pw_aff_le_set(__isl_take isl_pw_aff *pwaff1,
1704 __isl_take isl_pw_aff *pwaff2)
1706 return isl_pw_aff_ge_set(pwaff2, pwaff1);
1709 __isl_give isl_set *isl_pw_aff_lt_set(__isl_take isl_pw_aff *pwaff1,
1710 __isl_take isl_pw_aff *pwaff2)
1712 return isl_pw_aff_gt_set(pwaff2, pwaff1);
1715 /* Return a set containing those elements in the shared domain
1716 * of the elements of list1 and list2 where each element in list1
1717 * has the relation specified by "fn" with each element in list2.
1719 static __isl_give isl_set *pw_aff_list_set(__isl_take isl_pw_aff_list *list1,
1720 __isl_take isl_pw_aff_list *list2,
1721 __isl_give isl_set *(*fn)(__isl_take isl_pw_aff *pwaff1,
1722 __isl_take isl_pw_aff *pwaff2))
1728 if (!list1 || !list2)
1731 ctx = isl_pw_aff_list_get_ctx(list1);
1732 if (list1->n < 1 || list2->n < 1)
1733 isl_die(ctx, isl_error_invalid,
1734 "list should contain at least one element", goto error);
1736 set = isl_set_universe(isl_pw_aff_get_domain_space(list1->p[0]));
1737 for (i = 0; i < list1->n; ++i)
1738 for (j = 0; j < list2->n; ++j) {
1741 set_ij = fn(isl_pw_aff_copy(list1->p[i]),
1742 isl_pw_aff_copy(list2->p[j]));
1743 set = isl_set_intersect(set, set_ij);
1746 isl_pw_aff_list_free(list1);
1747 isl_pw_aff_list_free(list2);
1750 isl_pw_aff_list_free(list1);
1751 isl_pw_aff_list_free(list2);
1755 /* Return a set containing those elements in the shared domain
1756 * of the elements of list1 and list2 where each element in list1
1757 * is equal to each element in list2.
1759 __isl_give isl_set *isl_pw_aff_list_eq_set(__isl_take isl_pw_aff_list *list1,
1760 __isl_take isl_pw_aff_list *list2)
1762 return pw_aff_list_set(list1, list2, &isl_pw_aff_eq_set);
1765 __isl_give isl_set *isl_pw_aff_list_ne_set(__isl_take isl_pw_aff_list *list1,
1766 __isl_take isl_pw_aff_list *list2)
1768 return pw_aff_list_set(list1, list2, &isl_pw_aff_ne_set);
1771 /* Return a set containing those elements in the shared domain
1772 * of the elements of list1 and list2 where each element in list1
1773 * is less than or equal to each element in list2.
1775 __isl_give isl_set *isl_pw_aff_list_le_set(__isl_take isl_pw_aff_list *list1,
1776 __isl_take isl_pw_aff_list *list2)
1778 return pw_aff_list_set(list1, list2, &isl_pw_aff_le_set);
1781 __isl_give isl_set *isl_pw_aff_list_lt_set(__isl_take isl_pw_aff_list *list1,
1782 __isl_take isl_pw_aff_list *list2)
1784 return pw_aff_list_set(list1, list2, &isl_pw_aff_lt_set);
1787 __isl_give isl_set *isl_pw_aff_list_ge_set(__isl_take isl_pw_aff_list *list1,
1788 __isl_take isl_pw_aff_list *list2)
1790 return pw_aff_list_set(list1, list2, &isl_pw_aff_ge_set);
1793 __isl_give isl_set *isl_pw_aff_list_gt_set(__isl_take isl_pw_aff_list *list1,
1794 __isl_take isl_pw_aff_list *list2)
1796 return pw_aff_list_set(list1, list2, &isl_pw_aff_gt_set);
1800 /* Return a set containing those elements in the shared domain
1801 * of pwaff1 and pwaff2 where pwaff1 is not equal to pwaff2.
1803 static __isl_give isl_set *pw_aff_ne_set(__isl_take isl_pw_aff *pwaff1,
1804 __isl_take isl_pw_aff *pwaff2)
1806 isl_set *set_lt, *set_gt;
1808 set_lt = isl_pw_aff_lt_set(isl_pw_aff_copy(pwaff1),
1809 isl_pw_aff_copy(pwaff2));
1810 set_gt = isl_pw_aff_gt_set(pwaff1, pwaff2);
1811 return isl_set_union_disjoint(set_lt, set_gt);
1814 __isl_give isl_set *isl_pw_aff_ne_set(__isl_take isl_pw_aff *pwaff1,
1815 __isl_take isl_pw_aff *pwaff2)
1817 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_ne_set);
1820 __isl_give isl_pw_aff *isl_pw_aff_scale_down(__isl_take isl_pw_aff *pwaff,
1825 if (isl_int_is_one(v))
1827 if (!isl_int_is_pos(v))
1828 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
1829 "factor needs to be positive",
1830 return isl_pw_aff_free(pwaff));
1831 pwaff = isl_pw_aff_cow(pwaff);
1837 for (i = 0; i < pwaff->n; ++i) {
1838 pwaff->p[i].aff = isl_aff_scale_down(pwaff->p[i].aff, v);
1839 if (!pwaff->p[i].aff)
1840 return isl_pw_aff_free(pwaff);
1846 __isl_give isl_pw_aff *isl_pw_aff_floor(__isl_take isl_pw_aff *pwaff)
1850 pwaff = isl_pw_aff_cow(pwaff);
1856 for (i = 0; i < pwaff->n; ++i) {
1857 pwaff->p[i].aff = isl_aff_floor(pwaff->p[i].aff);
1858 if (!pwaff->p[i].aff)
1859 return isl_pw_aff_free(pwaff);
1865 __isl_give isl_pw_aff *isl_pw_aff_ceil(__isl_take isl_pw_aff *pwaff)
1869 pwaff = isl_pw_aff_cow(pwaff);
1875 for (i = 0; i < pwaff->n; ++i) {
1876 pwaff->p[i].aff = isl_aff_ceil(pwaff->p[i].aff);
1877 if (!pwaff->p[i].aff)
1878 return isl_pw_aff_free(pwaff);
1884 /* Assuming that "cond1" and "cond2" are disjoint,
1885 * return an affine expression that is equal to pwaff1 on cond1
1886 * and to pwaff2 on cond2.
1888 static __isl_give isl_pw_aff *isl_pw_aff_select(
1889 __isl_take isl_set *cond1, __isl_take isl_pw_aff *pwaff1,
1890 __isl_take isl_set *cond2, __isl_take isl_pw_aff *pwaff2)
1892 pwaff1 = isl_pw_aff_intersect_domain(pwaff1, cond1);
1893 pwaff2 = isl_pw_aff_intersect_domain(pwaff2, cond2);
1895 return isl_pw_aff_add_disjoint(pwaff1, pwaff2);
1898 /* Return an affine expression that is equal to pwaff_true for elements
1899 * where "cond" is non-zero and to pwaff_false for elements where "cond"
1901 * That is, return cond ? pwaff_true : pwaff_false;
1903 __isl_give isl_pw_aff *isl_pw_aff_cond(__isl_take isl_pw_aff *cond,
1904 __isl_take isl_pw_aff *pwaff_true, __isl_take isl_pw_aff *pwaff_false)
1906 isl_set *cond_true, *cond_false;
1908 cond_true = isl_pw_aff_non_zero_set(isl_pw_aff_copy(cond));
1909 cond_false = isl_pw_aff_zero_set(cond);
1910 return isl_pw_aff_select(cond_true, pwaff_true,
1911 cond_false, pwaff_false);
1914 int isl_aff_is_cst(__isl_keep isl_aff *aff)
1919 return isl_seq_first_non_zero(aff->v->el + 2, aff->v->size - 2) == -1;
1922 /* Check whether pwaff is a piecewise constant.
1924 int isl_pw_aff_is_cst(__isl_keep isl_pw_aff *pwaff)
1931 for (i = 0; i < pwaff->n; ++i) {
1932 int is_cst = isl_aff_is_cst(pwaff->p[i].aff);
1933 if (is_cst < 0 || !is_cst)
1940 __isl_give isl_aff *isl_aff_mul(__isl_take isl_aff *aff1,
1941 __isl_take isl_aff *aff2)
1943 if (!isl_aff_is_cst(aff2) && isl_aff_is_cst(aff1))
1944 return isl_aff_mul(aff2, aff1);
1946 if (!isl_aff_is_cst(aff2))
1947 isl_die(isl_aff_get_ctx(aff1), isl_error_invalid,
1948 "at least one affine expression should be constant",
1951 aff1 = isl_aff_cow(aff1);
1955 aff1 = isl_aff_scale(aff1, aff2->v->el[1]);
1956 aff1 = isl_aff_scale_down(aff1, aff2->v->el[0]);
1966 static __isl_give isl_pw_aff *pw_aff_add(__isl_take isl_pw_aff *pwaff1,
1967 __isl_take isl_pw_aff *pwaff2)
1969 return isl_pw_aff_on_shared_domain(pwaff1, pwaff2, &isl_aff_add);
1972 __isl_give isl_pw_aff *isl_pw_aff_add(__isl_take isl_pw_aff *pwaff1,
1973 __isl_take isl_pw_aff *pwaff2)
1975 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_add);
1978 __isl_give isl_pw_aff *isl_pw_aff_union_add(__isl_take isl_pw_aff *pwaff1,
1979 __isl_take isl_pw_aff *pwaff2)
1981 return isl_pw_aff_union_add_(pwaff1, pwaff2);
1984 static __isl_give isl_pw_aff *pw_aff_mul(__isl_take isl_pw_aff *pwaff1,
1985 __isl_take isl_pw_aff *pwaff2)
1987 return isl_pw_aff_on_shared_domain(pwaff1, pwaff2, &isl_aff_mul);
1990 __isl_give isl_pw_aff *isl_pw_aff_mul(__isl_take isl_pw_aff *pwaff1,
1991 __isl_take isl_pw_aff *pwaff2)
1993 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_mul);
1996 static __isl_give isl_pw_aff *pw_aff_min(__isl_take isl_pw_aff *pwaff1,
1997 __isl_take isl_pw_aff *pwaff2)
2002 dom = isl_set_intersect(isl_pw_aff_domain(isl_pw_aff_copy(pwaff1)),
2003 isl_pw_aff_domain(isl_pw_aff_copy(pwaff2)));
2004 le = isl_pw_aff_le_set(isl_pw_aff_copy(pwaff1),
2005 isl_pw_aff_copy(pwaff2));
2006 dom = isl_set_subtract(dom, isl_set_copy(le));
2007 return isl_pw_aff_select(le, pwaff1, dom, pwaff2);
2010 __isl_give isl_pw_aff *isl_pw_aff_min(__isl_take isl_pw_aff *pwaff1,
2011 __isl_take isl_pw_aff *pwaff2)
2013 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_min);
2016 static __isl_give isl_pw_aff *pw_aff_max(__isl_take isl_pw_aff *pwaff1,
2017 __isl_take isl_pw_aff *pwaff2)
2022 dom = isl_set_intersect(isl_pw_aff_domain(isl_pw_aff_copy(pwaff1)),
2023 isl_pw_aff_domain(isl_pw_aff_copy(pwaff2)));
2024 ge = isl_pw_aff_ge_set(isl_pw_aff_copy(pwaff1),
2025 isl_pw_aff_copy(pwaff2));
2026 dom = isl_set_subtract(dom, isl_set_copy(ge));
2027 return isl_pw_aff_select(ge, pwaff1, dom, pwaff2);
2030 __isl_give isl_pw_aff *isl_pw_aff_max(__isl_take isl_pw_aff *pwaff1,
2031 __isl_take isl_pw_aff *pwaff2)
2033 return isl_pw_aff_align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_max);
2036 static __isl_give isl_pw_aff *pw_aff_list_reduce(
2037 __isl_take isl_pw_aff_list *list,
2038 __isl_give isl_pw_aff *(*fn)(__isl_take isl_pw_aff *pwaff1,
2039 __isl_take isl_pw_aff *pwaff2))
2048 ctx = isl_pw_aff_list_get_ctx(list);
2050 isl_die(ctx, isl_error_invalid,
2051 "list should contain at least one element",
2052 return isl_pw_aff_list_free(list));
2054 res = isl_pw_aff_copy(list->p[0]);
2055 for (i = 1; i < list->n; ++i)
2056 res = fn(res, isl_pw_aff_copy(list->p[i]));
2058 isl_pw_aff_list_free(list);
2062 /* Return an isl_pw_aff that maps each element in the intersection of the
2063 * domains of the elements of list to the minimal corresponding affine
2066 __isl_give isl_pw_aff *isl_pw_aff_list_min(__isl_take isl_pw_aff_list *list)
2068 return pw_aff_list_reduce(list, &isl_pw_aff_min);
2071 /* Return an isl_pw_aff that maps each element in the intersection of the
2072 * domains of the elements of list to the maximal corresponding affine
2075 __isl_give isl_pw_aff *isl_pw_aff_list_max(__isl_take isl_pw_aff_list *list)
2077 return pw_aff_list_reduce(list, &isl_pw_aff_max);
2083 #include <isl_multi_templ.c>
2085 /* Construct an isl_multi_aff in the given space with value zero in
2086 * each of the output dimensions.
2088 __isl_give isl_multi_aff *isl_multi_aff_zero(__isl_take isl_space *space)
2096 n = isl_space_dim(space , isl_dim_out);
2097 ma = isl_multi_aff_alloc(isl_space_copy(space));
2100 isl_space_free(space);
2103 isl_local_space *ls;
2106 space = isl_space_domain(space);
2107 ls = isl_local_space_from_space(space);
2108 aff = isl_aff_zero_on_domain(ls);
2110 for (i = 0; i < n; ++i)
2111 ma = isl_multi_aff_set_aff(ma, i, isl_aff_copy(aff));
2119 /* Create an isl_pw_multi_aff with the given isl_multi_aff on a universe
2122 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_multi_aff(
2123 __isl_take isl_multi_aff *ma)
2125 isl_set *dom = isl_set_universe(isl_multi_aff_get_domain_space(ma));
2126 return isl_pw_multi_aff_alloc(dom, ma);
2129 __isl_give isl_multi_aff *isl_multi_aff_add(__isl_take isl_multi_aff *maff1,
2130 __isl_take isl_multi_aff *maff2)
2135 maff1 = isl_multi_aff_cow(maff1);
2136 if (!maff1 || !maff2)
2139 ctx = isl_multi_aff_get_ctx(maff1);
2140 if (!isl_space_is_equal(maff1->space, maff2->space))
2141 isl_die(ctx, isl_error_invalid,
2142 "spaces don't match", goto error);
2144 for (i = 0; i < maff1->n; ++i) {
2145 maff1->p[i] = isl_aff_add(maff1->p[i],
2146 isl_aff_copy(maff2->p[i]));
2151 isl_multi_aff_free(maff2);
2154 isl_multi_aff_free(maff1);
2155 isl_multi_aff_free(maff2);
2159 /* Exploit the equalities in "eq" to simplify the affine expressions.
2161 static __isl_give isl_multi_aff *isl_multi_aff_substitute_equalities(
2162 __isl_take isl_multi_aff *maff, __isl_take isl_basic_set *eq)
2166 maff = isl_multi_aff_cow(maff);
2170 for (i = 0; i < maff->n; ++i) {
2171 maff->p[i] = isl_aff_substitute_equalities(maff->p[i],
2172 isl_basic_set_copy(eq));
2177 isl_basic_set_free(eq);
2180 isl_basic_set_free(eq);
2181 isl_multi_aff_free(maff);
2185 __isl_give isl_multi_aff *isl_multi_aff_scale(__isl_take isl_multi_aff *maff,
2190 maff = isl_multi_aff_cow(maff);
2194 for (i = 0; i < maff->n; ++i) {
2195 maff->p[i] = isl_aff_scale(maff->p[i], f);
2197 return isl_multi_aff_free(maff);
2203 __isl_give isl_multi_aff *isl_multi_aff_add_on_domain(__isl_keep isl_set *dom,
2204 __isl_take isl_multi_aff *maff1, __isl_take isl_multi_aff *maff2)
2206 maff1 = isl_multi_aff_add(maff1, maff2);
2207 maff1 = isl_multi_aff_gist(maff1, isl_set_copy(dom));
2211 int isl_multi_aff_is_empty(__isl_keep isl_multi_aff *maff)
2219 int isl_multi_aff_plain_is_equal(__isl_keep isl_multi_aff *maff1,
2220 __isl_keep isl_multi_aff *maff2)
2225 if (!maff1 || !maff2)
2227 if (maff1->n != maff2->n)
2229 equal = isl_space_is_equal(maff1->space, maff2->space);
2230 if (equal < 0 || !equal)
2233 for (i = 0; i < maff1->n; ++i) {
2234 equal = isl_aff_plain_is_equal(maff1->p[i], maff2->p[i]);
2235 if (equal < 0 || !equal)
2242 __isl_give isl_multi_aff *isl_multi_aff_set_dim_name(
2243 __isl_take isl_multi_aff *maff,
2244 enum isl_dim_type type, unsigned pos, const char *s)
2248 maff = isl_multi_aff_cow(maff);
2252 maff->space = isl_space_set_dim_name(maff->space, type, pos, s);
2254 return isl_multi_aff_free(maff);
2255 for (i = 0; i < maff->n; ++i) {
2256 maff->p[i] = isl_aff_set_dim_name(maff->p[i], type, pos, s);
2258 return isl_multi_aff_free(maff);
2264 __isl_give isl_multi_aff *isl_multi_aff_drop_dims(__isl_take isl_multi_aff *maff,
2265 enum isl_dim_type type, unsigned first, unsigned n)
2269 maff = isl_multi_aff_cow(maff);
2273 maff->space = isl_space_drop_dims(maff->space, type, first, n);
2275 return isl_multi_aff_free(maff);
2277 if (type == isl_dim_out) {
2278 for (i = 0; i < n; ++i)
2279 isl_aff_free(maff->p[first + i]);
2280 for (i = first; i + n < maff->n; ++i)
2281 maff->p[i] = maff->p[i + n];
2286 for (i = 0; i < maff->n; ++i) {
2287 maff->p[i] = isl_aff_drop_dims(maff->p[i], type, first, n);
2289 return isl_multi_aff_free(maff);
2296 #define PW isl_pw_multi_aff
2298 #define EL isl_multi_aff
2300 #define EL_IS_ZERO is_empty
2304 #define IS_ZERO is_empty
2307 #undef DEFAULT_IS_ZERO
2308 #define DEFAULT_IS_ZERO 0
2313 #define NO_INVOLVES_DIMS
2314 #define NO_MOVE_DIMS
2315 #define NO_INSERT_DIMS
2319 #include <isl_pw_templ.c>
2322 #define UNION isl_union_pw_multi_aff
2324 #define PART isl_pw_multi_aff
2326 #define PARTS pw_multi_aff
2327 #define ALIGN_DOMAIN
2331 #include <isl_union_templ.c>
2333 static __isl_give isl_pw_multi_aff *pw_multi_aff_add(
2334 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
2336 return isl_pw_multi_aff_on_shared_domain(pma1, pma2,
2337 &isl_multi_aff_add);
2340 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_add(
2341 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
2343 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
2347 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_union_add(
2348 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
2350 return isl_pw_multi_aff_union_add_(pma1, pma2);
2353 /* Construct a map mapping the domain of the piecewise multi-affine expression
2354 * to its range, with each dimension in the range equated to the
2355 * corresponding affine expression on its cell.
2357 __isl_give isl_map *isl_map_from_pw_multi_aff(__isl_take isl_pw_multi_aff *pma)
2365 map = isl_map_empty(isl_pw_multi_aff_get_space(pma));
2367 for (i = 0; i < pma->n; ++i) {
2368 isl_multi_aff *maff;
2369 isl_basic_map *bmap;
2372 maff = isl_multi_aff_copy(pma->p[i].maff);
2373 bmap = isl_basic_map_from_multi_aff(maff);
2374 map_i = isl_map_from_basic_map(bmap);
2375 map_i = isl_map_intersect_domain(map_i,
2376 isl_set_copy(pma->p[i].set));
2377 map = isl_map_union_disjoint(map, map_i);
2380 isl_pw_multi_aff_free(pma);
2384 __isl_give isl_set *isl_set_from_pw_multi_aff(__isl_take isl_pw_multi_aff *pma)
2386 if (!isl_space_is_set(pma->dim))
2387 isl_die(isl_pw_multi_aff_get_ctx(pma), isl_error_invalid,
2388 "isl_pw_multi_aff cannot be converted into an isl_set",
2389 return isl_pw_multi_aff_free(pma));
2391 return isl_map_from_pw_multi_aff(pma);
2394 /* Given a basic map with a single output dimension that is defined
2395 * in terms of the parameters and input dimensions using an equality,
2396 * extract an isl_aff that expresses the output dimension in terms
2397 * of the parameters and input dimensions.
2399 * Since some applications expect the result of isl_pw_multi_aff_from_map
2400 * to only contain integer affine expressions, we compute the floor
2401 * of the expression before returning.
2403 * This function shares some similarities with
2404 * isl_basic_map_has_defining_equality and isl_constraint_get_bound.
2406 static __isl_give isl_aff *extract_isl_aff_from_basic_map(
2407 __isl_take isl_basic_map *bmap)
2412 isl_local_space *ls;
2417 if (isl_basic_map_dim(bmap, isl_dim_out) != 1)
2418 isl_die(isl_basic_map_get_ctx(bmap), isl_error_invalid,
2419 "basic map should have a single output dimension",
2421 offset = isl_basic_map_offset(bmap, isl_dim_out);
2422 total = isl_basic_map_total_dim(bmap);
2423 for (i = 0; i < bmap->n_eq; ++i) {
2424 if (isl_int_is_zero(bmap->eq[i][offset]))
2426 if (isl_seq_first_non_zero(bmap->eq[i] + offset + 1,
2427 1 + total - (offset + 1)) != -1)
2431 if (i >= bmap->n_eq)
2432 isl_die(isl_basic_map_get_ctx(bmap), isl_error_invalid,
2433 "unable to find suitable equality", goto error);
2434 ls = isl_basic_map_get_local_space(bmap);
2435 aff = isl_aff_alloc(isl_local_space_domain(ls));
2438 if (isl_int_is_neg(bmap->eq[i][offset]))
2439 isl_seq_cpy(aff->v->el + 1, bmap->eq[i], offset);
2441 isl_seq_neg(aff->v->el + 1, bmap->eq[i], offset);
2442 isl_seq_clr(aff->v->el + 1 + offset, aff->v->size - (1 + offset));
2443 isl_int_abs(aff->v->el[0], bmap->eq[i][offset]);
2444 isl_basic_map_free(bmap);
2446 aff = isl_aff_remove_unused_divs(aff);
2447 aff = isl_aff_floor(aff);
2450 isl_basic_map_free(bmap);
2454 /* Given a basic map where each output dimension is defined
2455 * in terms of the parameters and input dimensions using an equality,
2456 * extract an isl_multi_aff that expresses the output dimensions in terms
2457 * of the parameters and input dimensions.
2459 static __isl_give isl_multi_aff *extract_isl_multi_aff_from_basic_map(
2460 __isl_take isl_basic_map *bmap)
2469 ma = isl_multi_aff_alloc(isl_basic_map_get_space(bmap));
2470 n_out = isl_basic_map_dim(bmap, isl_dim_out);
2472 for (i = 0; i < n_out; ++i) {
2473 isl_basic_map *bmap_i;
2476 bmap_i = isl_basic_map_copy(bmap);
2477 bmap_i = isl_basic_map_project_out(bmap_i, isl_dim_out,
2478 i + 1, n_out - (1 + i));
2479 bmap_i = isl_basic_map_project_out(bmap_i, isl_dim_out, 0, i);
2480 aff = extract_isl_aff_from_basic_map(bmap_i);
2481 ma = isl_multi_aff_set_aff(ma, i, aff);
2484 isl_basic_map_free(bmap);
2489 /* Create an isl_pw_multi_aff that is equivalent to
2490 * isl_map_intersect_domain(isl_map_from_basic_map(bmap), domain).
2491 * The given basic map is such that each output dimension is defined
2492 * in terms of the parameters and input dimensions using an equality.
2494 static __isl_give isl_pw_multi_aff *plain_pw_multi_aff_from_map(
2495 __isl_take isl_set *domain, __isl_take isl_basic_map *bmap)
2499 ma = extract_isl_multi_aff_from_basic_map(bmap);
2500 return isl_pw_multi_aff_alloc(domain, ma);
2503 /* Try and create an isl_pw_multi_aff that is equivalent to the given isl_map.
2504 * This obivously only works if the input "map" is single-valued.
2505 * If so, we compute the lexicographic minimum of the image in the form
2506 * of an isl_pw_multi_aff. Since the image is unique, it is equal
2507 * to its lexicographic minimum.
2508 * If the input is not single-valued, we produce an error.
2510 * As a special case, we first check if all output dimensions are uniquely
2511 * defined in terms of the parameters and input dimensions over the entire
2512 * domain. If so, we extract the desired isl_pw_multi_aff directly
2513 * from the affine hull of "map" and its domain.
2515 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_map(__isl_take isl_map *map)
2519 isl_pw_multi_aff *pma;
2520 isl_basic_map *hull;
2525 hull = isl_map_affine_hull(isl_map_copy(map));
2526 sv = isl_basic_map_plain_is_single_valued(hull);
2528 return plain_pw_multi_aff_from_map(isl_map_domain(map), hull);
2529 isl_basic_map_free(hull);
2533 sv = isl_map_is_single_valued(map);
2537 isl_die(isl_map_get_ctx(map), isl_error_invalid,
2538 "map is not single-valued", goto error);
2539 map = isl_map_make_disjoint(map);
2543 pma = isl_pw_multi_aff_empty(isl_map_get_space(map));
2545 for (i = 0; i < map->n; ++i) {
2546 isl_pw_multi_aff *pma_i;
2547 isl_basic_map *bmap;
2548 bmap = isl_basic_map_copy(map->p[i]);
2549 pma_i = isl_basic_map_lexmin_pw_multi_aff(bmap);
2550 pma = isl_pw_multi_aff_add_disjoint(pma, pma_i);
2560 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_set(__isl_take isl_set *set)
2562 return isl_pw_multi_aff_from_map(set);
2565 /* Return the piecewise affine expression "set ? 1 : 0".
2567 __isl_give isl_pw_aff *isl_set_indicator_function(__isl_take isl_set *set)
2570 isl_space *space = isl_set_get_space(set);
2571 isl_local_space *ls = isl_local_space_from_space(space);
2572 isl_aff *zero = isl_aff_zero_on_domain(isl_local_space_copy(ls));
2573 isl_aff *one = isl_aff_zero_on_domain(ls);
2575 one = isl_aff_add_constant_si(one, 1);
2576 pa = isl_pw_aff_alloc(isl_set_copy(set), one);
2577 set = isl_set_complement(set);
2578 pa = isl_pw_aff_add_disjoint(pa, isl_pw_aff_alloc(set, zero));
2583 /* Plug in "subs" for dimension "type", "pos" of "aff".
2585 * Let i be the dimension to replace and let "subs" be of the form
2589 * and "aff" of the form
2595 * floor((a f + d g')/(m d))
2597 * where g' is the result of plugging in "subs" in each of the integer
2600 __isl_give isl_aff *isl_aff_substitute(__isl_take isl_aff *aff,
2601 enum isl_dim_type type, unsigned pos, __isl_keep isl_aff *subs)
2606 aff = isl_aff_cow(aff);
2608 return isl_aff_free(aff);
2610 ctx = isl_aff_get_ctx(aff);
2611 if (!isl_space_is_equal(aff->ls->dim, subs->ls->dim))
2612 isl_die(ctx, isl_error_invalid,
2613 "spaces don't match", return isl_aff_free(aff));
2614 if (isl_local_space_dim(subs->ls, isl_dim_div) != 0)
2615 isl_die(ctx, isl_error_unsupported,
2616 "cannot handle divs yet", return isl_aff_free(aff));
2618 aff->ls = isl_local_space_substitute(aff->ls, type, pos, subs);
2620 return isl_aff_free(aff);
2622 aff->v = isl_vec_cow(aff->v);
2624 return isl_aff_free(aff);
2626 pos += isl_local_space_offset(aff->ls, type);
2629 isl_int_set(v, aff->v->el[1 + pos]);
2630 isl_int_set_si(aff->v->el[1 + pos], 0);
2631 isl_seq_combine(aff->v->el + 1, subs->v->el[0], aff->v->el + 1,
2632 v, subs->v->el + 1, subs->v->size - 1);
2633 isl_int_mul(aff->v->el[0], aff->v->el[0], subs->v->el[0]);
2639 /* Plug in "subs" for dimension "type", "pos" in each of the affine
2640 * expressions in "maff".
2642 __isl_give isl_multi_aff *isl_multi_aff_substitute(
2643 __isl_take isl_multi_aff *maff, enum isl_dim_type type, unsigned pos,
2644 __isl_keep isl_aff *subs)
2648 maff = isl_multi_aff_cow(maff);
2650 return isl_multi_aff_free(maff);
2652 if (type == isl_dim_in)
2655 for (i = 0; i < maff->n; ++i) {
2656 maff->p[i] = isl_aff_substitute(maff->p[i], type, pos, subs);
2658 return isl_multi_aff_free(maff);
2664 /* Plug in "subs" for dimension "type", "pos" of "pma".
2666 * pma is of the form
2670 * while subs is of the form
2672 * v' = B_j(v) -> S_j
2674 * Each pair i,j such that C_ij = A_i \cap B_i is non-empty
2675 * has a contribution in the result, in particular
2677 * C_ij(S_j) -> M_i(S_j)
2679 * Note that plugging in S_j in C_ij may also result in an empty set
2680 * and this contribution should simply be discarded.
2682 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_substitute(
2683 __isl_take isl_pw_multi_aff *pma, enum isl_dim_type type, unsigned pos,
2684 __isl_keep isl_pw_aff *subs)
2687 isl_pw_multi_aff *res;
2690 return isl_pw_multi_aff_free(pma);
2692 n = pma->n * subs->n;
2693 res = isl_pw_multi_aff_alloc_size(isl_space_copy(pma->dim), n);
2695 for (i = 0; i < pma->n; ++i) {
2696 for (j = 0; j < subs->n; ++j) {
2698 isl_multi_aff *res_ij;
2699 common = isl_set_intersect(
2700 isl_set_copy(pma->p[i].set),
2701 isl_set_copy(subs->p[j].set));
2702 common = isl_set_substitute(common,
2703 type, pos, subs->p[j].aff);
2704 if (isl_set_plain_is_empty(common)) {
2705 isl_set_free(common);
2709 res_ij = isl_multi_aff_substitute(
2710 isl_multi_aff_copy(pma->p[i].maff),
2711 type, pos, subs->p[j].aff);
2713 res = isl_pw_multi_aff_add_piece(res, common, res_ij);
2717 isl_pw_multi_aff_free(pma);
2721 /* Extend the local space of "dst" to include the divs
2722 * in the local space of "src".
2724 __isl_give isl_aff *isl_aff_align_divs(__isl_take isl_aff *dst,
2725 __isl_keep isl_aff *src)
2733 return isl_aff_free(dst);
2735 ctx = isl_aff_get_ctx(src);
2736 if (!isl_space_is_equal(src->ls->dim, dst->ls->dim))
2737 isl_die(ctx, isl_error_invalid,
2738 "spaces don't match", goto error);
2740 if (src->ls->div->n_row == 0)
2743 exp1 = isl_alloc_array(ctx, int, src->ls->div->n_row);
2744 exp2 = isl_alloc_array(ctx, int, dst->ls->div->n_row);
2748 div = isl_merge_divs(src->ls->div, dst->ls->div, exp1, exp2);
2749 dst = isl_aff_expand_divs(dst, div, exp2);
2757 return isl_aff_free(dst);
2760 /* Adjust the local spaces of the affine expressions in "maff"
2761 * such that they all have the save divs.
2763 __isl_give isl_multi_aff *isl_multi_aff_align_divs(
2764 __isl_take isl_multi_aff *maff)
2772 maff = isl_multi_aff_cow(maff);
2776 for (i = 1; i < maff->n; ++i)
2777 maff->p[0] = isl_aff_align_divs(maff->p[0], maff->p[i]);
2778 for (i = 1; i < maff->n; ++i) {
2779 maff->p[i] = isl_aff_align_divs(maff->p[i], maff->p[0]);
2781 return isl_multi_aff_free(maff);
2787 __isl_give isl_aff *isl_aff_lift(__isl_take isl_aff *aff)
2789 aff = isl_aff_cow(aff);
2793 aff->ls = isl_local_space_lift(aff->ls);
2795 return isl_aff_free(aff);
2800 /* Lift "maff" to a space with extra dimensions such that the result
2801 * has no more existentially quantified variables.
2802 * If "ls" is not NULL, then *ls is assigned the local space that lies
2803 * at the basis of the lifting applied to "maff".
2805 __isl_give isl_multi_aff *isl_multi_aff_lift(__isl_take isl_multi_aff *maff,
2806 __isl_give isl_local_space **ls)
2820 isl_space *space = isl_multi_aff_get_domain_space(maff);
2821 *ls = isl_local_space_from_space(space);
2823 return isl_multi_aff_free(maff);
2828 maff = isl_multi_aff_cow(maff);
2829 maff = isl_multi_aff_align_divs(maff);
2833 n_div = isl_aff_dim(maff->p[0], isl_dim_div);
2834 space = isl_multi_aff_get_space(maff);
2835 space = isl_space_lift(isl_space_domain(space), n_div);
2836 space = isl_space_extend_domain_with_range(space,
2837 isl_multi_aff_get_space(maff));
2839 return isl_multi_aff_free(maff);
2840 isl_space_free(maff->space);
2841 maff->space = space;
2844 *ls = isl_aff_get_domain_local_space(maff->p[0]);
2846 return isl_multi_aff_free(maff);
2849 for (i = 0; i < maff->n; ++i) {
2850 maff->p[i] = isl_aff_lift(maff->p[i]);
2858 isl_local_space_free(*ls);
2859 return isl_multi_aff_free(maff);
2863 /* Extract an isl_pw_aff corresponding to output dimension "pos" of "pma".
2865 __isl_give isl_pw_aff *isl_pw_multi_aff_get_pw_aff(
2866 __isl_keep isl_pw_multi_aff *pma, int pos)
2876 n_out = isl_pw_multi_aff_dim(pma, isl_dim_out);
2877 if (pos < 0 || pos >= n_out)
2878 isl_die(isl_pw_multi_aff_get_ctx(pma), isl_error_invalid,
2879 "index out of bounds", return NULL);
2881 space = isl_pw_multi_aff_get_space(pma);
2882 space = isl_space_drop_dims(space, isl_dim_out,
2883 pos + 1, n_out - pos - 1);
2884 space = isl_space_drop_dims(space, isl_dim_out, 0, pos);
2886 pa = isl_pw_aff_alloc_size(space, pma->n);
2887 for (i = 0; i < pma->n; ++i) {
2889 aff = isl_multi_aff_get_aff(pma->p[i].maff, pos);
2890 pa = isl_pw_aff_add_piece(pa, isl_set_copy(pma->p[i].set), aff);
2896 /* Return an isl_pw_multi_aff with the given "set" as domain and
2897 * an unnamed zero-dimensional range.
2899 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_from_domain(
2900 __isl_take isl_set *set)
2905 space = isl_set_get_space(set);
2906 space = isl_space_from_domain(space);
2907 ma = isl_multi_aff_zero(space);
2908 return isl_pw_multi_aff_alloc(set, ma);
2911 /* Add an isl_pw_multi_aff with the given "set" as domain and
2912 * an unnamed zero-dimensional range to *user.
2914 static int add_pw_multi_aff_from_domain(__isl_take isl_set *set, void *user)
2916 isl_union_pw_multi_aff **upma = user;
2917 isl_pw_multi_aff *pma;
2919 pma = isl_pw_multi_aff_from_domain(set);
2920 *upma = isl_union_pw_multi_aff_add_pw_multi_aff(*upma, pma);
2925 /* Return an isl_union_pw_multi_aff with the given "uset" as domain and
2926 * an unnamed zero-dimensional range.
2928 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_from_domain(
2929 __isl_take isl_union_set *uset)
2932 isl_union_pw_multi_aff *upma;
2937 space = isl_union_set_get_space(uset);
2938 upma = isl_union_pw_multi_aff_empty(space);
2940 if (isl_union_set_foreach_set(uset,
2941 &add_pw_multi_aff_from_domain, &upma) < 0)
2944 isl_union_set_free(uset);
2947 isl_union_set_free(uset);
2948 isl_union_pw_multi_aff_free(upma);
2952 /* Convert "pma" to an isl_map and add it to *umap.
2954 static int map_from_pw_multi_aff(__isl_take isl_pw_multi_aff *pma, void *user)
2956 isl_union_map **umap = user;
2959 map = isl_map_from_pw_multi_aff(pma);
2960 *umap = isl_union_map_add_map(*umap, map);
2965 /* Construct a union map mapping the domain of the union
2966 * piecewise multi-affine expression to its range, with each dimension
2967 * in the range equated to the corresponding affine expression on its cell.
2969 __isl_give isl_union_map *isl_union_map_from_union_pw_multi_aff(
2970 __isl_take isl_union_pw_multi_aff *upma)
2973 isl_union_map *umap;
2978 space = isl_union_pw_multi_aff_get_space(upma);
2979 umap = isl_union_map_empty(space);
2981 if (isl_union_pw_multi_aff_foreach_pw_multi_aff(upma,
2982 &map_from_pw_multi_aff, &umap) < 0)
2985 isl_union_pw_multi_aff_free(upma);
2988 isl_union_pw_multi_aff_free(upma);
2989 isl_union_map_free(umap);
2993 /* Local data for bin_entry and the callback "fn".
2995 struct isl_union_pw_multi_aff_bin_data {
2996 isl_union_pw_multi_aff *upma2;
2997 isl_union_pw_multi_aff *res;
2998 isl_pw_multi_aff *pma;
2999 int (*fn)(void **entry, void *user);
3002 /* Given an isl_pw_multi_aff from upma1, store it in data->pma
3003 * and call data->fn for each isl_pw_multi_aff in data->upma2.
3005 static int bin_entry(void **entry, void *user)
3007 struct isl_union_pw_multi_aff_bin_data *data = user;
3008 isl_pw_multi_aff *pma = *entry;
3011 if (isl_hash_table_foreach(data->upma2->dim->ctx, &data->upma2->table,
3012 data->fn, data) < 0)
3018 /* Call "fn" on each pair of isl_pw_multi_affs in "upma1" and "upma2".
3019 * The isl_pw_multi_aff from upma1 is stored in data->pma (where data is
3020 * passed as user field) and the isl_pw_multi_aff from upma2 is available
3021 * as *entry. The callback should adjust data->res if desired.
3023 static __isl_give isl_union_pw_multi_aff *bin_op(
3024 __isl_take isl_union_pw_multi_aff *upma1,
3025 __isl_take isl_union_pw_multi_aff *upma2,
3026 int (*fn)(void **entry, void *user))
3029 struct isl_union_pw_multi_aff_bin_data data = { NULL, NULL, NULL, fn };
3031 space = isl_union_pw_multi_aff_get_space(upma2);
3032 upma1 = isl_union_pw_multi_aff_align_params(upma1, space);
3033 space = isl_union_pw_multi_aff_get_space(upma1);
3034 upma2 = isl_union_pw_multi_aff_align_params(upma2, space);
3036 if (!upma1 || !upma2)
3040 data.res = isl_union_pw_multi_aff_alloc(isl_space_copy(upma1->dim),
3042 if (isl_hash_table_foreach(upma1->dim->ctx, &upma1->table,
3043 &bin_entry, &data) < 0)
3046 isl_union_pw_multi_aff_free(upma1);
3047 isl_union_pw_multi_aff_free(upma2);
3050 isl_union_pw_multi_aff_free(upma1);
3051 isl_union_pw_multi_aff_free(upma2);
3052 isl_union_pw_multi_aff_free(data.res);
3056 /* Given two isl_multi_affs A -> B and C -> D,
3057 * construct an isl_multi_aff (A * C) -> (B, D).
3059 __isl_give isl_multi_aff *isl_multi_aff_flat_range_product(
3060 __isl_take isl_multi_aff *ma1, __isl_take isl_multi_aff *ma2)
3070 space = isl_space_range_product(isl_multi_aff_get_space(ma1),
3071 isl_multi_aff_get_space(ma2));
3072 space = isl_space_flatten_range(space);
3073 res = isl_multi_aff_alloc(space);
3075 n1 = isl_multi_aff_dim(ma1, isl_dim_out);
3076 n2 = isl_multi_aff_dim(ma2, isl_dim_out);
3078 for (i = 0; i < n1; ++i) {
3079 aff = isl_multi_aff_get_aff(ma1, i);
3080 res = isl_multi_aff_set_aff(res, i, aff);
3083 for (i = 0; i < n2; ++i) {
3084 aff = isl_multi_aff_get_aff(ma2, i);
3085 res = isl_multi_aff_set_aff(res, n1 + i, aff);
3088 isl_multi_aff_free(ma1);
3089 isl_multi_aff_free(ma2);
3092 isl_multi_aff_free(ma1);
3093 isl_multi_aff_free(ma2);
3097 /* Given two aligned isl_pw_multi_affs A -> B and C -> D,
3098 * construct an isl_pw_multi_aff (A * C) -> (B, D).
3100 static __isl_give isl_pw_multi_aff *pw_multi_aff_flat_range_product(
3101 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3105 space = isl_space_range_product(isl_pw_multi_aff_get_space(pma1),
3106 isl_pw_multi_aff_get_space(pma2));
3107 space = isl_space_flatten_range(space);
3108 return isl_pw_multi_aff_on_shared_domain_in(pma1, pma2, space,
3109 &isl_multi_aff_flat_range_product);
3112 /* Given two isl_pw_multi_affs A -> B and C -> D,
3113 * construct an isl_pw_multi_aff (A * C) -> (B, D).
3115 __isl_give isl_pw_multi_aff *isl_pw_multi_aff_flat_range_product(
3116 __isl_take isl_pw_multi_aff *pma1, __isl_take isl_pw_multi_aff *pma2)
3118 return isl_pw_multi_aff_align_params_pw_pw_and(pma1, pma2,
3119 &pw_multi_aff_flat_range_product);
3122 /* If data->pma and *entry have the same domain space, then compute
3123 * their flat range product and the result to data->res.
3125 static int flat_range_product_entry(void **entry, void *user)
3127 struct isl_union_pw_multi_aff_bin_data *data = user;
3128 isl_pw_multi_aff *pma2 = *entry;
3130 if (!isl_space_tuple_match(data->pma->dim, isl_dim_in,
3131 pma2->dim, isl_dim_in))
3134 pma2 = isl_pw_multi_aff_flat_range_product(
3135 isl_pw_multi_aff_copy(data->pma),
3136 isl_pw_multi_aff_copy(pma2));
3138 data->res = isl_union_pw_multi_aff_add_pw_multi_aff(data->res, pma2);
3143 /* Given two isl_union_pw_multi_affs A -> B and C -> D,
3144 * construct an isl_union_pw_multi_aff (A * C) -> (B, D).
3146 __isl_give isl_union_pw_multi_aff *isl_union_pw_multi_aff_flat_range_product(
3147 __isl_take isl_union_pw_multi_aff *upma1,
3148 __isl_take isl_union_pw_multi_aff *upma2)
3150 return bin_op(upma1, upma2, &flat_range_product_entry);