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/*
* Copyright 2010 INRIA Saclay
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
* Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
* 91893 Orsay, France
*/
#include <isl_ctx_private.h>
#include <isl_space_private.h>
#include <isl_reordering.h>
__isl_give isl_reordering *isl_reordering_alloc(isl_ctx *ctx, int len)
{
isl_reordering *exp;
exp = isl_alloc(ctx, struct isl_reordering,
sizeof(struct isl_reordering) + (len - 1) * sizeof(int));
if (!exp)
return NULL;
exp->ref = 1;
exp->len = len;
exp->dim = NULL;
return exp;
}
__isl_give isl_reordering *isl_reordering_copy(__isl_keep isl_reordering *exp)
{
if (!exp)
return NULL;
exp->ref++;
return exp;
}
__isl_give isl_reordering *isl_reordering_dup(__isl_keep isl_reordering *r)
{
int i;
isl_reordering *dup;
if (!r)
return NULL;
dup = isl_reordering_alloc(r->dim->ctx, r->len);
if (!dup)
return NULL;
dup->dim = isl_space_copy(r->dim);
if (!dup->dim)
return isl_reordering_free(dup);
for (i = 0; i < dup->len; ++i)
dup->pos[i] = r->pos[i];
return dup;
}
__isl_give isl_reordering *isl_reordering_cow(__isl_take isl_reordering *r)
{
if (!r)
return NULL;
if (r->ref == 1)
return r;
r->ref--;
return isl_reordering_dup(r);
}
void *isl_reordering_free(__isl_take isl_reordering *exp)
{
if (!exp)
return NULL;
if (--exp->ref > 0)
return NULL;
isl_space_free(exp->dim);
free(exp);
return NULL;
}
/* Construct a reordering that maps the parameters of "alignee"
* to the corresponding parameters in a new dimension specification
* that has the parameters of "aligner" first, followed by
* any remaining parameters of "alignee" that do not occur in "aligner".
*/
__isl_give isl_reordering *isl_parameter_alignment_reordering(
__isl_keep isl_space *alignee, __isl_keep isl_space *aligner)
{
int i, j;
isl_reordering *exp;
if (!alignee || !aligner)
return NULL;
exp = isl_reordering_alloc(alignee->ctx, alignee->nparam);
if (!exp)
return NULL;
exp->dim = isl_space_copy(aligner);
for (i = 0; i < alignee->nparam; ++i) {
isl_id *id_i;
id_i = isl_space_get_dim_id(alignee, isl_dim_param, i);
if (!id_i)
isl_die(alignee->ctx, isl_error_invalid,
"cannot align unnamed parameters", goto error);
for (j = 0; j < aligner->nparam; ++j) {
isl_id *id_j;
id_j = isl_space_get_dim_id(aligner, isl_dim_param, j);
isl_id_free(id_j);
if (id_i == id_j)
break;
}
if (j < aligner->nparam) {
exp->pos[i] = j;
isl_id_free(id_i);
} else {
int pos;
pos = isl_space_dim(exp->dim, isl_dim_param);
exp->dim = isl_space_add_dims(exp->dim, isl_dim_param, 1);
exp->dim = isl_space_set_dim_id(exp->dim,
isl_dim_param, pos, id_i);
exp->pos[i] = pos;
}
}
if (!exp->dim)
return isl_reordering_free(exp);
return exp;
error:
isl_reordering_free(exp);
return NULL;
}
__isl_give isl_reordering *isl_reordering_extend(__isl_take isl_reordering *exp,
unsigned extra)
{
int i;
isl_reordering *res;
int offset;
if (!exp)
return NULL;
if (extra == 0)
return exp;
offset = isl_space_dim(exp->dim, isl_dim_all) - exp->len;
res = isl_reordering_alloc(exp->dim->ctx, exp->len + extra);
if (!res)
goto error;
res->dim = isl_space_copy(exp->dim);
for (i = 0; i < exp->len; ++i)
res->pos[i] = exp->pos[i];
for (i = exp->len; i < res->len; ++i)
res->pos[i] = offset + i;
isl_reordering_free(exp);
return res;
error:
isl_reordering_free(exp);
return NULL;
}
__isl_give isl_reordering *isl_reordering_extend_space(
__isl_take isl_reordering *exp, __isl_take isl_space *dim)
{
isl_reordering *res;
if (!exp || !dim)
goto error;
res = isl_reordering_extend(isl_reordering_copy(exp),
isl_space_dim(dim, isl_dim_all) - exp->len);
res = isl_reordering_cow(res);
if (!res)
goto error;
isl_space_free(res->dim);
res->dim = isl_space_replace(dim, isl_dim_param, exp->dim);
isl_reordering_free(exp);
if (!res->dim)
return isl_reordering_free(res);
return res;
error:
isl_reordering_free(exp);
isl_space_free(dim);
return NULL;
}
void isl_reordering_dump(__isl_keep isl_reordering *exp)
{
int i;
for (i = 0; i < exp->len; ++i)
fprintf(stderr, "%d -> %d; ", i, exp->pos[i]);
fprintf(stderr, "\n");
}
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