2 * Copyright 2011 INRIA Saclay
3 * Copyright 2011 Sven Verdoolaege
5 * Use of this software is governed by the GNU LGPLv2.1 license
7 * Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
8 * Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
12 #include <isl_ctx_private.h>
13 #include <isl_map_private.h>
14 #include <isl_aff_private.h>
15 #include <isl_space_private.h>
16 #include <isl_local_space_private.h>
17 #include <isl_mat_private.h>
18 #include <isl_list_private.h>
19 #include <isl/constraint.h>
23 __isl_give isl_aff *isl_aff_alloc_vec(__isl_take isl_local_space *ls,
24 __isl_take isl_vec *v)
31 aff = isl_calloc_type(v->ctx, struct isl_aff);
41 isl_local_space_free(ls);
46 __isl_give isl_aff *isl_aff_alloc(__isl_take isl_local_space *ls)
55 ctx = isl_local_space_get_ctx(ls);
56 if (!isl_local_space_divs_known(ls))
57 isl_die(ctx, isl_error_invalid, "local space has unknown divs",
59 if (!isl_local_space_is_set(ls))
60 isl_die(ctx, isl_error_invalid,
61 "domain of affine expression should be a set",
64 total = isl_local_space_dim(ls, isl_dim_all);
65 v = isl_vec_alloc(ctx, 1 + 1 + total);
66 return isl_aff_alloc_vec(ls, v);
68 isl_local_space_free(ls);
72 __isl_give isl_aff *isl_aff_zero_on_domain(__isl_take isl_local_space *ls)
76 aff = isl_aff_alloc(ls);
80 isl_int_set_si(aff->v->el[0], 1);
81 isl_seq_clr(aff->v->el + 1, aff->v->size - 1);
86 __isl_give isl_aff *isl_aff_copy(__isl_keep isl_aff *aff)
95 __isl_give isl_aff *isl_aff_dup(__isl_keep isl_aff *aff)
100 return isl_aff_alloc_vec(isl_local_space_copy(aff->ls),
101 isl_vec_copy(aff->v));
104 __isl_give isl_aff *isl_aff_cow(__isl_take isl_aff *aff)
112 return isl_aff_dup(aff);
115 void *isl_aff_free(__isl_take isl_aff *aff)
123 isl_local_space_free(aff->ls);
124 isl_vec_free(aff->v);
131 isl_ctx *isl_aff_get_ctx(__isl_keep isl_aff *aff)
133 return aff ? isl_local_space_get_ctx(aff->ls) : NULL;
136 /* Externally, an isl_aff has a map space, but internally, the
137 * ls field corresponds to the domain of that space.
139 int isl_aff_dim(__isl_keep isl_aff *aff, enum isl_dim_type type)
143 if (type == isl_dim_out)
145 if (type == isl_dim_in)
147 return isl_local_space_dim(aff->ls, type);
150 __isl_give isl_space *isl_aff_get_domain_space(__isl_keep isl_aff *aff)
152 return aff ? isl_local_space_get_space(aff->ls) : NULL;
155 __isl_give isl_space *isl_aff_get_space(__isl_keep isl_aff *aff)
160 space = isl_local_space_get_space(aff->ls);
161 space = isl_space_from_domain(space);
162 space = isl_space_add_dims(space, isl_dim_out, 1);
166 __isl_give isl_local_space *isl_aff_get_domain_local_space(
167 __isl_keep isl_aff *aff)
169 return aff ? isl_local_space_copy(aff->ls) : NULL;
172 __isl_give isl_local_space *isl_aff_get_local_space(__isl_keep isl_aff *aff)
177 ls = isl_local_space_copy(aff->ls);
178 ls = isl_local_space_from_domain(ls);
179 ls = isl_local_space_add_dims(ls, isl_dim_out, 1);
183 /* Externally, an isl_aff has a map space, but internally, the
184 * ls field corresponds to the domain of that space.
186 const char *isl_aff_get_dim_name(__isl_keep isl_aff *aff,
187 enum isl_dim_type type, unsigned pos)
191 if (type == isl_dim_out)
193 if (type == isl_dim_in)
195 return isl_local_space_get_dim_name(aff->ls, type, pos);
198 __isl_give isl_aff *isl_aff_reset_domain_space(__isl_take isl_aff *aff,
199 __isl_take isl_space *dim)
201 aff = isl_aff_cow(aff);
205 aff->ls = isl_local_space_reset_space(aff->ls, dim);
207 return isl_aff_free(aff);
216 /* Reset the space of "aff". This function is called from isl_pw_templ.c
217 * and doesn't know if the space of an element object is represented
218 * directly or through its domain. It therefore passes along both.
220 __isl_give isl_aff *isl_aff_reset_space_and_domain(__isl_take isl_aff *aff,
221 __isl_take isl_space *space, __isl_take isl_space *domain)
223 isl_space_free(space);
224 return isl_aff_reset_domain_space(aff, domain);
227 /* Reorder the coefficients of the affine expression based
228 * on the given reodering.
229 * The reordering r is assumed to have been extended with the local
232 static __isl_give isl_vec *vec_reorder(__isl_take isl_vec *vec,
233 __isl_take isl_reordering *r, int n_div)
241 res = isl_vec_alloc(vec->ctx,
242 2 + isl_space_dim(r->dim, isl_dim_all) + n_div);
243 isl_seq_cpy(res->el, vec->el, 2);
244 isl_seq_clr(res->el + 2, res->size - 2);
245 for (i = 0; i < r->len; ++i)
246 isl_int_set(res->el[2 + r->pos[i]], vec->el[2 + i]);
248 isl_reordering_free(r);
253 isl_reordering_free(r);
257 /* Reorder the dimensions of the domain of "aff" according
258 * to the given reordering.
260 __isl_give isl_aff *isl_aff_realign_domain(__isl_take isl_aff *aff,
261 __isl_take isl_reordering *r)
263 aff = isl_aff_cow(aff);
267 r = isl_reordering_extend(r, aff->ls->div->n_row);
268 aff->v = vec_reorder(aff->v, isl_reordering_copy(r),
269 aff->ls->div->n_row);
270 aff->ls = isl_local_space_realign(aff->ls, r);
272 if (!aff->v || !aff->ls)
273 return isl_aff_free(aff);
278 isl_reordering_free(r);
282 int isl_aff_plain_is_zero(__isl_keep isl_aff *aff)
287 return isl_seq_first_non_zero(aff->v->el + 1, aff->v->size - 1) < 0;
290 int isl_aff_plain_is_equal(__isl_keep isl_aff *aff1, __isl_keep isl_aff *aff2)
297 equal = isl_local_space_is_equal(aff1->ls, aff2->ls);
298 if (equal < 0 || !equal)
301 return isl_vec_is_equal(aff1->v, aff2->v);
304 int isl_aff_get_denominator(__isl_keep isl_aff *aff, isl_int *v)
308 isl_int_set(*v, aff->v->el[0]);
312 int isl_aff_get_constant(__isl_keep isl_aff *aff, isl_int *v)
316 isl_int_set(*v, aff->v->el[1]);
320 int isl_aff_get_coefficient(__isl_keep isl_aff *aff,
321 enum isl_dim_type type, int pos, isl_int *v)
326 if (type == isl_dim_out)
327 isl_die(aff->v->ctx, isl_error_invalid,
328 "output/set dimension does not have a coefficient",
330 if (type == isl_dim_in)
333 if (pos >= isl_local_space_dim(aff->ls, type))
334 isl_die(aff->v->ctx, isl_error_invalid,
335 "position out of bounds", return -1);
337 pos += isl_local_space_offset(aff->ls, type);
338 isl_int_set(*v, aff->v->el[1 + pos]);
343 __isl_give isl_aff *isl_aff_set_denominator(__isl_take isl_aff *aff, isl_int v)
345 aff = isl_aff_cow(aff);
349 aff->v = isl_vec_cow(aff->v);
351 return isl_aff_free(aff);
353 isl_int_set(aff->v->el[0], v);
358 __isl_give isl_aff *isl_aff_set_constant(__isl_take isl_aff *aff, isl_int v)
360 aff = isl_aff_cow(aff);
364 aff->v = isl_vec_cow(aff->v);
366 return isl_aff_free(aff);
368 isl_int_set(aff->v->el[1], v);
373 __isl_give isl_aff *isl_aff_add_constant(__isl_take isl_aff *aff, isl_int v)
375 if (isl_int_is_zero(v))
378 aff = isl_aff_cow(aff);
382 aff->v = isl_vec_cow(aff->v);
384 return isl_aff_free(aff);
386 isl_int_addmul(aff->v->el[1], aff->v->el[0], v);
391 __isl_give isl_aff *isl_aff_add_constant_si(__isl_take isl_aff *aff, int v)
396 isl_int_set_si(t, v);
397 aff = isl_aff_add_constant(aff, t);
403 __isl_give isl_aff *isl_aff_set_constant_si(__isl_take isl_aff *aff, int v)
405 aff = isl_aff_cow(aff);
409 aff->v = isl_vec_cow(aff->v);
411 return isl_aff_free(aff);
413 isl_int_set_si(aff->v->el[1], v);
418 __isl_give isl_aff *isl_aff_set_coefficient(__isl_take isl_aff *aff,
419 enum isl_dim_type type, int pos, isl_int v)
424 if (type == isl_dim_out)
425 isl_die(aff->v->ctx, isl_error_invalid,
426 "output/set dimension does not have a coefficient",
427 return isl_aff_free(aff));
428 if (type == isl_dim_in)
431 if (pos >= isl_local_space_dim(aff->ls, type))
432 isl_die(aff->v->ctx, isl_error_invalid,
433 "position out of bounds", return isl_aff_free(aff));
435 aff = isl_aff_cow(aff);
439 aff->v = isl_vec_cow(aff->v);
441 return isl_aff_free(aff);
443 pos += isl_local_space_offset(aff->ls, type);
444 isl_int_set(aff->v->el[1 + pos], v);
449 __isl_give isl_aff *isl_aff_set_coefficient_si(__isl_take isl_aff *aff,
450 enum isl_dim_type type, int pos, int v)
455 if (type == isl_dim_out)
456 isl_die(aff->v->ctx, isl_error_invalid,
457 "output/set dimension does not have a coefficient",
458 return isl_aff_free(aff));
459 if (type == isl_dim_in)
462 if (pos >= isl_local_space_dim(aff->ls, type))
463 isl_die(aff->v->ctx, isl_error_invalid,
464 "position out of bounds", return isl_aff_free(aff));
466 aff = isl_aff_cow(aff);
470 aff->v = isl_vec_cow(aff->v);
472 return isl_aff_free(aff);
474 pos += isl_local_space_offset(aff->ls, type);
475 isl_int_set_si(aff->v->el[1 + pos], v);
480 __isl_give isl_aff *isl_aff_add_coefficient(__isl_take isl_aff *aff,
481 enum isl_dim_type type, int pos, isl_int v)
486 if (type == isl_dim_out)
487 isl_die(aff->v->ctx, isl_error_invalid,
488 "output/set dimension does not have a coefficient",
489 return isl_aff_free(aff));
490 if (type == isl_dim_in)
493 if (pos >= isl_local_space_dim(aff->ls, type))
494 isl_die(aff->v->ctx, isl_error_invalid,
495 "position out of bounds", return isl_aff_free(aff));
497 aff = isl_aff_cow(aff);
501 aff->v = isl_vec_cow(aff->v);
503 return isl_aff_free(aff);
505 pos += isl_local_space_offset(aff->ls, type);
506 isl_int_addmul(aff->v->el[1 + pos], aff->v->el[0], v);
511 __isl_give isl_aff *isl_aff_add_coefficient_si(__isl_take isl_aff *aff,
512 enum isl_dim_type type, int pos, int v)
517 isl_int_set_si(t, v);
518 aff = isl_aff_add_coefficient(aff, type, pos, t);
524 __isl_give isl_div *isl_aff_get_div(__isl_keep isl_aff *aff, int pos)
529 return isl_local_space_get_div(aff->ls, pos);
532 __isl_give isl_aff *isl_aff_neg(__isl_take isl_aff *aff)
534 aff = isl_aff_cow(aff);
537 aff->v = isl_vec_cow(aff->v);
539 return isl_aff_free(aff);
541 isl_seq_neg(aff->v->el + 1, aff->v->el + 1, aff->v->size - 1);
546 /* Given f, return floor(f).
547 * If f is an integer expression, then just return f.
548 * Otherwise, if f = g/m, write g = q m + r,
549 * create a new div d = [r/m] and return the expression q + d.
550 * The coefficients in r are taken to lie between -m/2 and m/2.
552 __isl_give isl_aff *isl_aff_floor(__isl_take isl_aff *aff)
562 if (isl_int_is_one(aff->v->el[0]))
565 aff = isl_aff_cow(aff);
569 aff->v = isl_vec_cow(aff->v);
570 div = isl_vec_copy(aff->v);
571 div = isl_vec_cow(div);
573 return isl_aff_free(aff);
575 ctx = isl_aff_get_ctx(aff);
576 isl_int_fdiv_q(aff->v->el[0], aff->v->el[0], ctx->two);
577 for (i = 1; i < aff->v->size; ++i) {
578 isl_int_fdiv_r(div->el[i], div->el[i], div->el[0]);
579 isl_int_fdiv_q(aff->v->el[i], aff->v->el[i], div->el[0]);
580 if (isl_int_gt(div->el[i], aff->v->el[0])) {
581 isl_int_sub(div->el[i], div->el[i], div->el[0]);
582 isl_int_add_ui(aff->v->el[i], aff->v->el[i], 1);
586 aff->ls = isl_local_space_add_div(aff->ls, div);
588 return isl_aff_free(aff);
591 aff->v = isl_vec_extend(aff->v, size + 1);
593 return isl_aff_free(aff);
594 isl_int_set_si(aff->v->el[0], 1);
595 isl_int_set_si(aff->v->el[size], 1);
602 * aff mod m = aff - m * floor(aff/m)
604 __isl_give isl_aff *isl_aff_mod(__isl_take isl_aff *aff, isl_int m)
608 res = isl_aff_copy(aff);
609 aff = isl_aff_scale_down(aff, m);
610 aff = isl_aff_floor(aff);
611 aff = isl_aff_scale(aff, m);
612 res = isl_aff_sub(res, aff);
619 * pwaff mod m = pwaff - m * floor(pwaff/m)
621 __isl_give isl_pw_aff *isl_pw_aff_mod(__isl_take isl_pw_aff *pwaff, isl_int m)
625 res = isl_pw_aff_copy(pwaff);
626 pwaff = isl_pw_aff_scale_down(pwaff, m);
627 pwaff = isl_pw_aff_floor(pwaff);
628 pwaff = isl_pw_aff_scale(pwaff, m);
629 res = isl_pw_aff_sub(res, pwaff);
634 /* Given f, return ceil(f).
635 * If f is an integer expression, then just return f.
636 * Otherwise, create a new div d = [-f] and return the expression -d.
638 __isl_give isl_aff *isl_aff_ceil(__isl_take isl_aff *aff)
643 if (isl_int_is_one(aff->v->el[0]))
646 aff = isl_aff_neg(aff);
647 aff = isl_aff_floor(aff);
648 aff = isl_aff_neg(aff);
653 /* Apply the expansion computed by isl_merge_divs.
654 * The expansion itself is given by "exp" while the resulting
655 * list of divs is given by "div".
657 __isl_give isl_aff *isl_aff_expand_divs( __isl_take isl_aff *aff,
658 __isl_take isl_mat *div, int *exp)
665 aff = isl_aff_cow(aff);
669 old_n_div = isl_local_space_dim(aff->ls, isl_dim_div);
670 new_n_div = isl_mat_rows(div);
671 if (new_n_div < old_n_div)
672 isl_die(isl_mat_get_ctx(div), isl_error_invalid,
673 "not an expansion", goto error);
675 aff->v = isl_vec_extend(aff->v, aff->v->size + new_n_div - old_n_div);
679 offset = 1 + isl_local_space_offset(aff->ls, isl_dim_div);
681 for (i = new_n_div - 1; i >= 0; --i) {
682 if (j >= 0 && exp[j] == i) {
684 isl_int_swap(aff->v->el[offset + i],
685 aff->v->el[offset + j]);
688 isl_int_set_si(aff->v->el[offset + i], 0);
691 aff->ls = isl_local_space_replace_divs(aff->ls, isl_mat_copy(div));
702 /* Add two affine expressions that live in the same local space.
704 static __isl_give isl_aff *add_expanded(__isl_take isl_aff *aff1,
705 __isl_take isl_aff *aff2)
709 aff1 = isl_aff_cow(aff1);
713 aff1->v = isl_vec_cow(aff1->v);
719 isl_int_gcd(gcd, aff1->v->el[0], aff2->v->el[0]);
720 isl_int_divexact(f, aff2->v->el[0], gcd);
721 isl_seq_scale(aff1->v->el + 1, aff1->v->el + 1, f, aff1->v->size - 1);
722 isl_int_divexact(f, aff1->v->el[0], gcd);
723 isl_seq_addmul(aff1->v->el + 1, f, aff2->v->el + 1, aff1->v->size - 1);
724 isl_int_divexact(f, aff2->v->el[0], gcd);
725 isl_int_mul(aff1->v->el[0], aff1->v->el[0], f);
737 __isl_give isl_aff *isl_aff_add(__isl_take isl_aff *aff1,
738 __isl_take isl_aff *aff2)
748 ctx = isl_aff_get_ctx(aff1);
749 if (!isl_space_is_equal(aff1->ls->dim, aff2->ls->dim))
750 isl_die(ctx, isl_error_invalid,
751 "spaces don't match", goto error);
753 if (aff1->ls->div->n_row == 0 && aff2->ls->div->n_row == 0)
754 return add_expanded(aff1, aff2);
756 exp1 = isl_alloc_array(ctx, int, aff1->ls->div->n_row);
757 exp2 = isl_alloc_array(ctx, int, aff2->ls->div->n_row);
761 div = isl_merge_divs(aff1->ls->div, aff2->ls->div, exp1, exp2);
762 aff1 = isl_aff_expand_divs(aff1, isl_mat_copy(div), exp1);
763 aff2 = isl_aff_expand_divs(aff2, div, exp2);
767 return add_expanded(aff1, aff2);
776 __isl_give isl_aff *isl_aff_sub(__isl_take isl_aff *aff1,
777 __isl_take isl_aff *aff2)
779 return isl_aff_add(aff1, isl_aff_neg(aff2));
782 __isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff, isl_int f)
786 if (isl_int_is_one(f))
789 aff = isl_aff_cow(aff);
792 aff->v = isl_vec_cow(aff->v);
794 return isl_aff_free(aff);
797 isl_int_gcd(gcd, aff->v->el[0], f);
798 isl_int_divexact(aff->v->el[0], aff->v->el[0], gcd);
799 isl_int_divexact(gcd, f, gcd);
800 isl_seq_scale(aff->v->el + 1, aff->v->el + 1, gcd, aff->v->size - 1);
806 __isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff, isl_int f)
810 if (isl_int_is_one(f))
813 aff = isl_aff_cow(aff);
816 aff->v = isl_vec_cow(aff->v);
818 return isl_aff_free(aff);
821 isl_seq_gcd(aff->v->el + 1, aff->v->size - 1, &gcd);
822 isl_int_gcd(gcd, gcd, f);
823 isl_seq_scale_down(aff->v->el + 1, aff->v->el + 1, gcd, aff->v->size - 1);
824 isl_int_divexact(gcd, f, gcd);
825 isl_int_mul(aff->v->el[0], aff->v->el[0], gcd);
831 __isl_give isl_aff *isl_aff_scale_down_ui(__isl_take isl_aff *aff, unsigned f)
839 isl_int_set_ui(v, f);
840 aff = isl_aff_scale_down(aff, v);
846 __isl_give isl_aff *isl_aff_set_dim_name(__isl_take isl_aff *aff,
847 enum isl_dim_type type, unsigned pos, const char *s)
849 aff = isl_aff_cow(aff);
852 if (type == isl_dim_out)
853 isl_die(aff->v->ctx, isl_error_invalid,
854 "cannot set name of output/set dimension",
855 return isl_aff_free(aff));
856 if (type == isl_dim_in)
858 aff->ls = isl_local_space_set_dim_name(aff->ls, type, pos, s);
860 return isl_aff_free(aff);
865 /* Exploit the equalities in "eq" to simplify the affine expression
866 * and the expressions of the integer divisions in the local space.
867 * The integer divisions in this local space are assumed to appear
868 * as regular dimensions in "eq".
870 static __isl_give isl_aff *isl_aff_substitute_equalities_lifted(
871 __isl_take isl_aff *aff, __isl_take isl_basic_set *eq)
880 isl_basic_set_free(eq);
884 aff = isl_aff_cow(aff);
888 aff->ls = isl_local_space_substitute_equalities(aff->ls,
889 isl_basic_set_copy(eq));
893 total = 1 + isl_space_dim(eq->dim, isl_dim_all);
895 for (i = 0; i < eq->n_eq; ++i) {
896 j = isl_seq_last_non_zero(eq->eq[i], total + n_div);
897 if (j < 0 || j == 0 || j >= total)
900 isl_seq_elim(aff->v->el + 1, eq->eq[i], j, total,
904 isl_basic_set_free(eq);
907 isl_basic_set_free(eq);
912 /* Exploit the equalities in "eq" to simplify the affine expression
913 * and the expressions of the integer divisions in the local space.
915 static __isl_give isl_aff *isl_aff_substitute_equalities(
916 __isl_take isl_aff *aff, __isl_take isl_basic_set *eq)
922 n_div = isl_local_space_dim(aff->ls, isl_dim_div);
924 eq = isl_basic_set_add(eq, isl_dim_set, n_div);
925 return isl_aff_substitute_equalities_lifted(aff, eq);
927 isl_basic_set_free(eq);
932 /* Look for equalities among the variables shared by context and aff
933 * and the integer divisions of aff, if any.
934 * The equalities are then used to eliminate coefficients and/or integer
935 * divisions from aff.
937 __isl_give isl_aff *isl_aff_gist(__isl_take isl_aff *aff,
938 __isl_take isl_set *context)
945 n_div = isl_local_space_dim(aff->ls, isl_dim_div);
949 context = isl_set_add_dims(context, isl_dim_set, n_div);
950 ls = isl_aff_get_domain_local_space(aff);
951 bset = isl_basic_set_from_local_space(ls);
952 bset = isl_basic_set_lift(bset);
953 bset = isl_basic_set_flatten(bset);
954 context = isl_set_intersect(context,
955 isl_set_from_basic_set(bset));
958 hull = isl_set_affine_hull(context);
959 return isl_aff_substitute_equalities_lifted(aff, hull);
962 isl_set_free(context);
966 /* Return a basic set containing those elements in the space
967 * of aff where it is non-negative.
969 __isl_give isl_basic_set *isl_aff_nonneg_basic_set(__isl_take isl_aff *aff)
971 isl_constraint *ineq;
973 ineq = isl_inequality_from_aff(aff);
975 return isl_basic_set_from_constraint(ineq);
978 /* Return a basic set containing those elements in the space
979 * of aff where it is zero.
981 __isl_give isl_basic_set *isl_aff_zero_basic_set(__isl_take isl_aff *aff)
983 isl_constraint *ineq;
985 ineq = isl_equality_from_aff(aff);
987 return isl_basic_set_from_constraint(ineq);
990 /* Return a basic set containing those elements in the shared space
991 * of aff1 and aff2 where aff1 is greater than or equal to aff2.
993 __isl_give isl_basic_set *isl_aff_ge_basic_set(__isl_take isl_aff *aff1,
994 __isl_take isl_aff *aff2)
996 aff1 = isl_aff_sub(aff1, aff2);
998 return isl_aff_nonneg_basic_set(aff1);
1001 /* Return a basic set containing those elements in the shared space
1002 * of aff1 and aff2 where aff1 is smaller than or equal to aff2.
1004 __isl_give isl_basic_set *isl_aff_le_basic_set(__isl_take isl_aff *aff1,
1005 __isl_take isl_aff *aff2)
1007 return isl_aff_ge_basic_set(aff2, aff1);
1010 __isl_give isl_aff *isl_aff_add_on_domain(__isl_keep isl_set *dom,
1011 __isl_take isl_aff *aff1, __isl_take isl_aff *aff2)
1013 aff1 = isl_aff_add(aff1, aff2);
1014 aff1 = isl_aff_gist(aff1, isl_set_copy(dom));
1018 int isl_aff_is_empty(__isl_keep isl_aff *aff)
1026 /* Check whether the given affine expression has non-zero coefficient
1027 * for any dimension in the given range or if any of these dimensions
1028 * appear with non-zero coefficients in any of the integer divisions
1029 * involved in the affine expression.
1031 int isl_aff_involves_dims(__isl_keep isl_aff *aff,
1032 enum isl_dim_type type, unsigned first, unsigned n)
1044 ctx = isl_aff_get_ctx(aff);
1045 if (first + n > isl_aff_dim(aff, type))
1046 isl_die(ctx, isl_error_invalid,
1047 "range out of bounds", return -1);
1049 active = isl_local_space_get_active(aff->ls, aff->v->el + 2);
1053 first += isl_local_space_offset(aff->ls, type) - 1;
1054 for (i = 0; i < n; ++i)
1055 if (active[first + i]) {
1068 __isl_give isl_aff *isl_aff_drop_dims(__isl_take isl_aff *aff,
1069 enum isl_dim_type type, unsigned first, unsigned n)
1075 if (type == isl_dim_out)
1076 isl_die(aff->v->ctx, isl_error_invalid,
1077 "cannot drop output/set dimension",
1078 return isl_aff_free(aff));
1079 if (type == isl_dim_in)
1081 if (n == 0 && !isl_local_space_is_named_or_nested(aff->ls, type))
1084 ctx = isl_aff_get_ctx(aff);
1085 if (first + n > isl_local_space_dim(aff->ls, type))
1086 isl_die(ctx, isl_error_invalid, "range out of bounds",
1087 return isl_aff_free(aff));
1089 aff = isl_aff_cow(aff);
1093 aff->ls = isl_local_space_drop_dims(aff->ls, type, first, n);
1095 return isl_aff_free(aff);
1097 first += 1 + isl_local_space_offset(aff->ls, type);
1098 aff->v = isl_vec_drop_els(aff->v, first, n);
1100 return isl_aff_free(aff);
1105 __isl_give isl_aff *isl_aff_insert_dims(__isl_take isl_aff *aff,
1106 enum isl_dim_type type, unsigned first, unsigned n)
1112 if (type == isl_dim_out)
1113 isl_die(aff->v->ctx, isl_error_invalid,
1114 "cannot insert output/set dimensions",
1115 return isl_aff_free(aff));
1116 if (type == isl_dim_in)
1118 if (n == 0 && !isl_local_space_is_named_or_nested(aff->ls, type))
1121 ctx = isl_aff_get_ctx(aff);
1122 if (first > isl_local_space_dim(aff->ls, type))
1123 isl_die(ctx, isl_error_invalid, "position out of bounds",
1124 return isl_aff_free(aff));
1126 aff = isl_aff_cow(aff);
1130 aff->ls = isl_local_space_insert_dims(aff->ls, type, first, n);
1132 return isl_aff_free(aff);
1134 first += 1 + isl_local_space_offset(aff->ls, type);
1135 aff->v = isl_vec_insert_zero_els(aff->v, first, n);
1137 return isl_aff_free(aff);
1142 __isl_give isl_aff *isl_aff_add_dims(__isl_take isl_aff *aff,
1143 enum isl_dim_type type, unsigned n)
1147 pos = isl_aff_dim(aff, type);
1149 return isl_aff_insert_dims(aff, type, pos, n);
1152 __isl_give isl_pw_aff *isl_pw_aff_add_dims(__isl_take isl_pw_aff *pwaff,
1153 enum isl_dim_type type, unsigned n)
1157 pos = isl_pw_aff_dim(pwaff, type);
1159 return isl_pw_aff_insert_dims(pwaff, type, pos, n);
1162 __isl_give isl_pw_aff *isl_pw_aff_set_tuple_id(__isl_take isl_pw_aff *pwaff,
1163 __isl_take isl_id *id)
1167 dim = isl_pw_aff_get_space(pwaff);
1168 dim = isl_space_set_tuple_id(dim, isl_dim_in, id);
1170 return isl_pw_aff_reset_space(pwaff, dim);
1173 __isl_give isl_pw_aff *isl_pw_aff_from_aff(__isl_take isl_aff *aff)
1175 isl_set *dom = isl_set_universe(isl_aff_get_domain_space(aff));
1176 return isl_pw_aff_alloc(dom, aff);
1180 #define PW isl_pw_aff
1184 #define EL_IS_ZERO is_empty
1188 #define IS_ZERO is_empty
1194 #define NO_MOVE_DIMS
1198 #include <isl_pw_templ.c>
1200 static __isl_give isl_set *align_params_pw_pw_set_and(
1201 __isl_take isl_pw_aff *pwaff1, __isl_take isl_pw_aff *pwaff2,
1202 __isl_give isl_set *(*fn)(__isl_take isl_pw_aff *pwaff1,
1203 __isl_take isl_pw_aff *pwaff2))
1205 if (!pwaff1 || !pwaff2)
1207 if (isl_space_match(pwaff1->dim, isl_dim_param,
1208 pwaff2->dim, isl_dim_param))
1209 return fn(pwaff1, pwaff2);
1210 if (!isl_space_has_named_params(pwaff1->dim) ||
1211 !isl_space_has_named_params(pwaff2->dim))
1212 isl_die(isl_pw_aff_get_ctx(pwaff1), isl_error_invalid,
1213 "unaligned unnamed parameters", goto error);
1214 pwaff1 = isl_pw_aff_align_params(pwaff1, isl_pw_aff_get_space(pwaff2));
1215 pwaff2 = isl_pw_aff_align_params(pwaff2, isl_pw_aff_get_space(pwaff1));
1216 return fn(pwaff1, pwaff2);
1218 isl_pw_aff_free(pwaff1);
1219 isl_pw_aff_free(pwaff2);
1223 /* Compute a piecewise quasi-affine expression with a domain that
1224 * is the union of those of pwaff1 and pwaff2 and such that on each
1225 * cell, the quasi-affine expression is the better (according to cmp)
1226 * of those of pwaff1 and pwaff2. If only one of pwaff1 or pwaff2
1227 * is defined on a given cell, then the associated expression
1228 * is the defined one.
1230 static __isl_give isl_pw_aff *pw_aff_union_opt(__isl_take isl_pw_aff *pwaff1,
1231 __isl_take isl_pw_aff *pwaff2,
1232 __isl_give isl_basic_set *(*cmp)(__isl_take isl_aff *aff1,
1233 __isl_take isl_aff *aff2))
1240 if (!pwaff1 || !pwaff2)
1243 ctx = isl_space_get_ctx(pwaff1->dim);
1244 if (!isl_space_is_equal(pwaff1->dim, pwaff2->dim))
1245 isl_die(ctx, isl_error_invalid,
1246 "arguments should live in same space", goto error);
1248 if (isl_pw_aff_is_empty(pwaff1)) {
1249 isl_pw_aff_free(pwaff1);
1253 if (isl_pw_aff_is_empty(pwaff2)) {
1254 isl_pw_aff_free(pwaff2);
1258 n = 2 * (pwaff1->n + 1) * (pwaff2->n + 1);
1259 res = isl_pw_aff_alloc_size(isl_space_copy(pwaff1->dim), n);
1261 for (i = 0; i < pwaff1->n; ++i) {
1262 set = isl_set_copy(pwaff1->p[i].set);
1263 for (j = 0; j < pwaff2->n; ++j) {
1264 struct isl_set *common;
1267 common = isl_set_intersect(
1268 isl_set_copy(pwaff1->p[i].set),
1269 isl_set_copy(pwaff2->p[j].set));
1270 better = isl_set_from_basic_set(cmp(
1271 isl_aff_copy(pwaff2->p[j].aff),
1272 isl_aff_copy(pwaff1->p[i].aff)));
1273 better = isl_set_intersect(common, better);
1274 if (isl_set_plain_is_empty(better)) {
1275 isl_set_free(better);
1278 set = isl_set_subtract(set, isl_set_copy(better));
1280 res = isl_pw_aff_add_piece(res, better,
1281 isl_aff_copy(pwaff2->p[j].aff));
1283 res = isl_pw_aff_add_piece(res, set,
1284 isl_aff_copy(pwaff1->p[i].aff));
1287 for (j = 0; j < pwaff2->n; ++j) {
1288 set = isl_set_copy(pwaff2->p[j].set);
1289 for (i = 0; i < pwaff1->n; ++i)
1290 set = isl_set_subtract(set,
1291 isl_set_copy(pwaff1->p[i].set));
1292 res = isl_pw_aff_add_piece(res, set,
1293 isl_aff_copy(pwaff2->p[j].aff));
1296 isl_pw_aff_free(pwaff1);
1297 isl_pw_aff_free(pwaff2);
1301 isl_pw_aff_free(pwaff1);
1302 isl_pw_aff_free(pwaff2);
1306 /* Compute a piecewise quasi-affine expression with a domain that
1307 * is the union of those of pwaff1 and pwaff2 and such that on each
1308 * cell, the quasi-affine expression is the maximum of those of pwaff1
1309 * and pwaff2. If only one of pwaff1 or pwaff2 is defined on a given
1310 * cell, then the associated expression is the defined one.
1312 static __isl_give isl_pw_aff *pw_aff_union_max(__isl_take isl_pw_aff *pwaff1,
1313 __isl_take isl_pw_aff *pwaff2)
1315 return pw_aff_union_opt(pwaff1, pwaff2, &isl_aff_ge_basic_set);
1318 __isl_give isl_pw_aff *isl_pw_aff_union_max(__isl_take isl_pw_aff *pwaff1,
1319 __isl_take isl_pw_aff *pwaff2)
1321 return align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_union_max);
1324 /* Compute a piecewise quasi-affine expression with a domain that
1325 * is the union of those of pwaff1 and pwaff2 and such that on each
1326 * cell, the quasi-affine expression is the minimum of those of pwaff1
1327 * and pwaff2. If only one of pwaff1 or pwaff2 is defined on a given
1328 * cell, then the associated expression is the defined one.
1330 static __isl_give isl_pw_aff *pw_aff_union_min(__isl_take isl_pw_aff *pwaff1,
1331 __isl_take isl_pw_aff *pwaff2)
1333 return pw_aff_union_opt(pwaff1, pwaff2, &isl_aff_le_basic_set);
1336 __isl_give isl_pw_aff *isl_pw_aff_union_min(__isl_take isl_pw_aff *pwaff1,
1337 __isl_take isl_pw_aff *pwaff2)
1339 return align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_union_min);
1342 __isl_give isl_pw_aff *isl_pw_aff_union_opt(__isl_take isl_pw_aff *pwaff1,
1343 __isl_take isl_pw_aff *pwaff2, int max)
1346 return isl_pw_aff_union_max(pwaff1, pwaff2);
1348 return isl_pw_aff_union_min(pwaff1, pwaff2);
1351 /* Construct a map with as domain the domain of pwaff and
1352 * one-dimensional range corresponding to the affine expressions.
1354 static __isl_give isl_map *map_from_pw_aff(__isl_take isl_pw_aff *pwaff)
1363 dim = isl_pw_aff_get_space(pwaff);
1364 map = isl_map_empty(dim);
1366 for (i = 0; i < pwaff->n; ++i) {
1367 isl_basic_map *bmap;
1370 bmap = isl_basic_map_from_aff(isl_aff_copy(pwaff->p[i].aff));
1371 map_i = isl_map_from_basic_map(bmap);
1372 map_i = isl_map_intersect_domain(map_i,
1373 isl_set_copy(pwaff->p[i].set));
1374 map = isl_map_union_disjoint(map, map_i);
1377 isl_pw_aff_free(pwaff);
1382 /* Construct a map with as domain the domain of pwaff and
1383 * one-dimensional range corresponding to the affine expressions.
1385 __isl_give isl_map *isl_map_from_pw_aff(__isl_take isl_pw_aff *pwaff)
1387 if (isl_space_is_set(pwaff->dim))
1388 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
1389 "space of input is not a map",
1390 return isl_pw_aff_free(pwaff));
1391 return map_from_pw_aff(pwaff);
1394 /* Construct a one-dimensional set with as parameter domain
1395 * the domain of pwaff and the single set dimension
1396 * corresponding to the affine expressions.
1398 __isl_give isl_set *isl_set_from_pw_aff(__isl_take isl_pw_aff *pwaff)
1400 if (!isl_space_is_set(pwaff->dim))
1401 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
1402 "space of input is not a set",
1403 return isl_pw_aff_free(pwaff));
1404 return map_from_pw_aff(pwaff);
1407 /* Return a set containing those elements in the domain
1408 * of pwaff where it is non-negative.
1410 __isl_give isl_set *isl_pw_aff_nonneg_set(__isl_take isl_pw_aff *pwaff)
1418 set = isl_set_empty(isl_pw_aff_get_domain_space(pwaff));
1420 for (i = 0; i < pwaff->n; ++i) {
1421 isl_basic_set *bset;
1424 bset = isl_aff_nonneg_basic_set(isl_aff_copy(pwaff->p[i].aff));
1425 set_i = isl_set_from_basic_set(bset);
1426 set_i = isl_set_intersect(set_i, isl_set_copy(pwaff->p[i].set));
1427 set = isl_set_union_disjoint(set, set_i);
1430 isl_pw_aff_free(pwaff);
1435 /* Return a set containing those elements in the domain
1436 * of pwaff where it is zero.
1438 __isl_give isl_set *isl_pw_aff_zero_set(__isl_take isl_pw_aff *pwaff)
1446 set = isl_set_empty(isl_pw_aff_get_domain_space(pwaff));
1448 for (i = 0; i < pwaff->n; ++i) {
1449 isl_basic_set *bset;
1452 bset = isl_aff_zero_basic_set(isl_aff_copy(pwaff->p[i].aff));
1453 set_i = isl_set_from_basic_set(bset);
1454 set_i = isl_set_intersect(set_i, isl_set_copy(pwaff->p[i].set));
1455 set = isl_set_union_disjoint(set, set_i);
1458 isl_pw_aff_free(pwaff);
1463 /* Return a set containing those elements in the domain
1464 * of pwaff where it is not zero.
1466 __isl_give isl_set *isl_pw_aff_non_zero_set(__isl_take isl_pw_aff *pwaff)
1468 return isl_set_complement(isl_pw_aff_zero_set(pwaff));
1471 /* Return a set containing those elements in the shared domain
1472 * of pwaff1 and pwaff2 where pwaff1 is greater than (or equal) to pwaff2.
1474 * We compute the difference on the shared domain and then construct
1475 * the set of values where this difference is non-negative.
1476 * If strict is set, we first subtract 1 from the difference.
1477 * If equal is set, we only return the elements where pwaff1 and pwaff2
1480 static __isl_give isl_set *pw_aff_gte_set(__isl_take isl_pw_aff *pwaff1,
1481 __isl_take isl_pw_aff *pwaff2, int strict, int equal)
1483 isl_set *set1, *set2;
1485 set1 = isl_pw_aff_domain(isl_pw_aff_copy(pwaff1));
1486 set2 = isl_pw_aff_domain(isl_pw_aff_copy(pwaff2));
1487 set1 = isl_set_intersect(set1, set2);
1488 pwaff1 = isl_pw_aff_intersect_domain(pwaff1, isl_set_copy(set1));
1489 pwaff2 = isl_pw_aff_intersect_domain(pwaff2, isl_set_copy(set1));
1490 pwaff1 = isl_pw_aff_add(pwaff1, isl_pw_aff_neg(pwaff2));
1493 isl_space *dim = isl_set_get_space(set1);
1495 aff = isl_aff_zero_on_domain(isl_local_space_from_space(dim));
1496 aff = isl_aff_add_constant_si(aff, -1);
1497 pwaff1 = isl_pw_aff_add(pwaff1, isl_pw_aff_alloc(set1, aff));
1502 return isl_pw_aff_zero_set(pwaff1);
1503 return isl_pw_aff_nonneg_set(pwaff1);
1506 /* Return a set containing those elements in the shared domain
1507 * of pwaff1 and pwaff2 where pwaff1 is equal to pwaff2.
1509 static __isl_give isl_set *pw_aff_eq_set(__isl_take isl_pw_aff *pwaff1,
1510 __isl_take isl_pw_aff *pwaff2)
1512 return pw_aff_gte_set(pwaff1, pwaff2, 0, 1);
1515 __isl_give isl_set *isl_pw_aff_eq_set(__isl_take isl_pw_aff *pwaff1,
1516 __isl_take isl_pw_aff *pwaff2)
1518 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_eq_set);
1521 /* Return a set containing those elements in the shared domain
1522 * of pwaff1 and pwaff2 where pwaff1 is greater than or equal to pwaff2.
1524 static __isl_give isl_set *pw_aff_ge_set(__isl_take isl_pw_aff *pwaff1,
1525 __isl_take isl_pw_aff *pwaff2)
1527 return pw_aff_gte_set(pwaff1, pwaff2, 0, 0);
1530 __isl_give isl_set *isl_pw_aff_ge_set(__isl_take isl_pw_aff *pwaff1,
1531 __isl_take isl_pw_aff *pwaff2)
1533 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_ge_set);
1536 /* Return a set containing those elements in the shared domain
1537 * of pwaff1 and pwaff2 where pwaff1 is strictly greater than pwaff2.
1539 static __isl_give isl_set *pw_aff_gt_set(__isl_take isl_pw_aff *pwaff1,
1540 __isl_take isl_pw_aff *pwaff2)
1542 return pw_aff_gte_set(pwaff1, pwaff2, 1, 0);
1545 __isl_give isl_set *isl_pw_aff_gt_set(__isl_take isl_pw_aff *pwaff1,
1546 __isl_take isl_pw_aff *pwaff2)
1548 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_gt_set);
1551 __isl_give isl_set *isl_pw_aff_le_set(__isl_take isl_pw_aff *pwaff1,
1552 __isl_take isl_pw_aff *pwaff2)
1554 return isl_pw_aff_ge_set(pwaff2, pwaff1);
1557 __isl_give isl_set *isl_pw_aff_lt_set(__isl_take isl_pw_aff *pwaff1,
1558 __isl_take isl_pw_aff *pwaff2)
1560 return isl_pw_aff_gt_set(pwaff2, pwaff1);
1563 /* Return a set containing those elements in the shared domain
1564 * of the elements of list1 and list2 where each element in list1
1565 * has the relation specified by "fn" with each element in list2.
1567 static __isl_give isl_set *pw_aff_list_set(__isl_take isl_pw_aff_list *list1,
1568 __isl_take isl_pw_aff_list *list2,
1569 __isl_give isl_set *(*fn)(__isl_take isl_pw_aff *pwaff1,
1570 __isl_take isl_pw_aff *pwaff2))
1576 if (!list1 || !list2)
1579 ctx = isl_pw_aff_list_get_ctx(list1);
1580 if (list1->n < 1 || list2->n < 1)
1581 isl_die(ctx, isl_error_invalid,
1582 "list should contain at least one element", goto error);
1584 set = isl_set_universe(isl_pw_aff_get_domain_space(list1->p[0]));
1585 for (i = 0; i < list1->n; ++i)
1586 for (j = 0; j < list2->n; ++j) {
1589 set_ij = fn(isl_pw_aff_copy(list1->p[i]),
1590 isl_pw_aff_copy(list2->p[j]));
1591 set = isl_set_intersect(set, set_ij);
1594 isl_pw_aff_list_free(list1);
1595 isl_pw_aff_list_free(list2);
1598 isl_pw_aff_list_free(list1);
1599 isl_pw_aff_list_free(list2);
1603 /* Return a set containing those elements in the shared domain
1604 * of the elements of list1 and list2 where each element in list1
1605 * is equal to each element in list2.
1607 __isl_give isl_set *isl_pw_aff_list_eq_set(__isl_take isl_pw_aff_list *list1,
1608 __isl_take isl_pw_aff_list *list2)
1610 return pw_aff_list_set(list1, list2, &isl_pw_aff_eq_set);
1613 __isl_give isl_set *isl_pw_aff_list_ne_set(__isl_take isl_pw_aff_list *list1,
1614 __isl_take isl_pw_aff_list *list2)
1616 return pw_aff_list_set(list1, list2, &isl_pw_aff_ne_set);
1619 /* Return a set containing those elements in the shared domain
1620 * of the elements of list1 and list2 where each element in list1
1621 * is less than or equal to each element in list2.
1623 __isl_give isl_set *isl_pw_aff_list_le_set(__isl_take isl_pw_aff_list *list1,
1624 __isl_take isl_pw_aff_list *list2)
1626 return pw_aff_list_set(list1, list2, &isl_pw_aff_le_set);
1629 __isl_give isl_set *isl_pw_aff_list_lt_set(__isl_take isl_pw_aff_list *list1,
1630 __isl_take isl_pw_aff_list *list2)
1632 return pw_aff_list_set(list1, list2, &isl_pw_aff_lt_set);
1635 __isl_give isl_set *isl_pw_aff_list_ge_set(__isl_take isl_pw_aff_list *list1,
1636 __isl_take isl_pw_aff_list *list2)
1638 return pw_aff_list_set(list1, list2, &isl_pw_aff_ge_set);
1641 __isl_give isl_set *isl_pw_aff_list_gt_set(__isl_take isl_pw_aff_list *list1,
1642 __isl_take isl_pw_aff_list *list2)
1644 return pw_aff_list_set(list1, list2, &isl_pw_aff_gt_set);
1648 /* Return a set containing those elements in the shared domain
1649 * of pwaff1 and pwaff2 where pwaff1 is not equal to pwaff2.
1651 static __isl_give isl_set *pw_aff_ne_set(__isl_take isl_pw_aff *pwaff1,
1652 __isl_take isl_pw_aff *pwaff2)
1654 isl_set *set_lt, *set_gt;
1656 set_lt = isl_pw_aff_lt_set(isl_pw_aff_copy(pwaff1),
1657 isl_pw_aff_copy(pwaff2));
1658 set_gt = isl_pw_aff_gt_set(pwaff1, pwaff2);
1659 return isl_set_union_disjoint(set_lt, set_gt);
1662 __isl_give isl_set *isl_pw_aff_ne_set(__isl_take isl_pw_aff *pwaff1,
1663 __isl_take isl_pw_aff *pwaff2)
1665 return align_params_pw_pw_set_and(pwaff1, pwaff2, &pw_aff_ne_set);
1668 __isl_give isl_pw_aff *isl_pw_aff_scale_down(__isl_take isl_pw_aff *pwaff,
1673 if (isl_int_is_one(v))
1675 if (!isl_int_is_pos(v))
1676 isl_die(isl_pw_aff_get_ctx(pwaff), isl_error_invalid,
1677 "factor needs to be positive",
1678 return isl_pw_aff_free(pwaff));
1679 pwaff = isl_pw_aff_cow(pwaff);
1685 for (i = 0; i < pwaff->n; ++i) {
1686 pwaff->p[i].aff = isl_aff_scale_down(pwaff->p[i].aff, v);
1687 if (!pwaff->p[i].aff)
1688 return isl_pw_aff_free(pwaff);
1694 __isl_give isl_pw_aff *isl_pw_aff_floor(__isl_take isl_pw_aff *pwaff)
1698 pwaff = isl_pw_aff_cow(pwaff);
1704 for (i = 0; i < pwaff->n; ++i) {
1705 pwaff->p[i].aff = isl_aff_floor(pwaff->p[i].aff);
1706 if (!pwaff->p[i].aff)
1707 return isl_pw_aff_free(pwaff);
1713 __isl_give isl_pw_aff *isl_pw_aff_ceil(__isl_take isl_pw_aff *pwaff)
1717 pwaff = isl_pw_aff_cow(pwaff);
1723 for (i = 0; i < pwaff->n; ++i) {
1724 pwaff->p[i].aff = isl_aff_ceil(pwaff->p[i].aff);
1725 if (!pwaff->p[i].aff)
1726 return isl_pw_aff_free(pwaff);
1732 /* Return an affine expression that is equal to pwaff_true for elements
1733 * in "cond" and to pwaff_false for elements not in "cond".
1734 * That is, return cond ? pwaff_true : pwaff_false;
1736 __isl_give isl_pw_aff *isl_pw_aff_cond(__isl_take isl_set *cond,
1737 __isl_take isl_pw_aff *pwaff_true, __isl_take isl_pw_aff *pwaff_false)
1741 comp = isl_set_complement(isl_set_copy(cond));
1742 pwaff_true = isl_pw_aff_intersect_domain(pwaff_true, cond);
1743 pwaff_false = isl_pw_aff_intersect_domain(pwaff_false, comp);
1745 return isl_pw_aff_add_disjoint(pwaff_true, pwaff_false);
1748 int isl_aff_is_cst(__isl_keep isl_aff *aff)
1753 return isl_seq_first_non_zero(aff->v->el + 2, aff->v->size - 2) == -1;
1756 /* Check whether pwaff is a piecewise constant.
1758 int isl_pw_aff_is_cst(__isl_keep isl_pw_aff *pwaff)
1765 for (i = 0; i < pwaff->n; ++i) {
1766 int is_cst = isl_aff_is_cst(pwaff->p[i].aff);
1767 if (is_cst < 0 || !is_cst)
1774 __isl_give isl_aff *isl_aff_mul(__isl_take isl_aff *aff1,
1775 __isl_take isl_aff *aff2)
1777 if (!isl_aff_is_cst(aff2) && isl_aff_is_cst(aff1))
1778 return isl_aff_mul(aff2, aff1);
1780 if (!isl_aff_is_cst(aff2))
1781 isl_die(isl_aff_get_ctx(aff1), isl_error_invalid,
1782 "at least one affine expression should be constant",
1785 aff1 = isl_aff_cow(aff1);
1789 aff1 = isl_aff_scale(aff1, aff2->v->el[1]);
1790 aff1 = isl_aff_scale_down(aff1, aff2->v->el[0]);
1800 static __isl_give isl_pw_aff *pw_aff_mul(__isl_take isl_pw_aff *pwaff1,
1801 __isl_take isl_pw_aff *pwaff2)
1806 if (!pwaff1 || !pwaff2)
1809 n = pwaff1->n * pwaff2->n;
1810 res = isl_pw_aff_alloc_size(isl_space_copy(pwaff1->dim), n);
1812 for (i = 0; i < pwaff1->n; ++i) {
1813 for (j = 0; j < pwaff2->n; ++j) {
1816 common = isl_set_intersect(
1817 isl_set_copy(pwaff1->p[i].set),
1818 isl_set_copy(pwaff2->p[j].set));
1819 if (isl_set_plain_is_empty(common)) {
1820 isl_set_free(common);
1824 prod = isl_aff_mul(isl_aff_copy(pwaff1->p[i].aff),
1825 isl_aff_copy(pwaff2->p[j].aff));
1827 res = isl_pw_aff_add_piece(res, common, prod);
1831 isl_pw_aff_free(pwaff1);
1832 isl_pw_aff_free(pwaff2);
1835 isl_pw_aff_free(pwaff1);
1836 isl_pw_aff_free(pwaff2);
1840 __isl_give isl_pw_aff *isl_pw_aff_mul(__isl_take isl_pw_aff *pwaff1,
1841 __isl_take isl_pw_aff *pwaff2)
1843 return align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_mul);
1846 static __isl_give isl_pw_aff *pw_aff_min(__isl_take isl_pw_aff *pwaff1,
1847 __isl_take isl_pw_aff *pwaff2)
1851 le = isl_pw_aff_le_set(isl_pw_aff_copy(pwaff1),
1852 isl_pw_aff_copy(pwaff2));
1853 return isl_pw_aff_cond(le, pwaff1, pwaff2);
1856 __isl_give isl_pw_aff *isl_pw_aff_min(__isl_take isl_pw_aff *pwaff1,
1857 __isl_take isl_pw_aff *pwaff2)
1859 return align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_min);
1862 static __isl_give isl_pw_aff *pw_aff_max(__isl_take isl_pw_aff *pwaff1,
1863 __isl_take isl_pw_aff *pwaff2)
1867 le = isl_pw_aff_ge_set(isl_pw_aff_copy(pwaff1),
1868 isl_pw_aff_copy(pwaff2));
1869 return isl_pw_aff_cond(le, pwaff1, pwaff2);
1872 __isl_give isl_pw_aff *isl_pw_aff_max(__isl_take isl_pw_aff *pwaff1,
1873 __isl_take isl_pw_aff *pwaff2)
1875 return align_params_pw_pw_and(pwaff1, pwaff2, &pw_aff_max);
1878 static __isl_give isl_pw_aff *pw_aff_list_reduce(
1879 __isl_take isl_pw_aff_list *list,
1880 __isl_give isl_pw_aff *(*fn)(__isl_take isl_pw_aff *pwaff1,
1881 __isl_take isl_pw_aff *pwaff2))
1890 ctx = isl_pw_aff_list_get_ctx(list);
1892 isl_die(ctx, isl_error_invalid,
1893 "list should contain at least one element",
1894 return isl_pw_aff_list_free(list));
1896 res = isl_pw_aff_copy(list->p[0]);
1897 for (i = 1; i < list->n; ++i)
1898 res = fn(res, isl_pw_aff_copy(list->p[i]));
1900 isl_pw_aff_list_free(list);
1904 /* Return an isl_pw_aff that maps each element in the intersection of the
1905 * domains of the elements of list to the minimal corresponding affine
1908 __isl_give isl_pw_aff *isl_pw_aff_list_min(__isl_take isl_pw_aff_list *list)
1910 return pw_aff_list_reduce(list, &isl_pw_aff_min);
1913 /* Return an isl_pw_aff that maps each element in the intersection of the
1914 * domains of the elements of list to the maximal corresponding affine
1917 __isl_give isl_pw_aff *isl_pw_aff_list_max(__isl_take isl_pw_aff_list *list)
1919 return pw_aff_list_reduce(list, &isl_pw_aff_max);