isl_map_polylib.c

   1 #include "isl_set.h"
   2 #include "isl_map.h"
   3 #include "isl_seq.h"
   4 #include "isl_map_polylib.h"
   5 #include "isl_map_private.h"
   6
   7 static void copy_values_from(isl_int *dst, Value *src, unsigned n)
   8 {
   9         int i;
  10
  11         for (i = 0; i < n; ++i)
  12                 value_assign(dst[i], src[i]);
  13 }
  14
  15 static void copy_values_to(Value *dst, isl_int *src, unsigned n)
  16 {
  17         int i;
  18
  19         for (i = 0; i < n; ++i)
  20                 value_assign(dst[i], src[i]);
  21 }
  22
  23 static void copy_constraint_from(isl_int *dst, Value *src,
  24                 unsigned nparam, unsigned dim, unsigned extra)
  25 {
  26         copy_values_from(dst, src+1+dim+extra+nparam, 1);
  27         copy_values_from(dst+1, src+1+dim+extra, nparam);
  28         copy_values_from(dst+1+nparam, src+1, dim);
  29         copy_values_from(dst+1+nparam+dim, src+1+dim, extra);
  30 }
  31
  32 static void copy_constraint_to(Value *dst, isl_int *src,
  33                 unsigned nparam, unsigned dim, unsigned extra)
  34 {
  35         copy_values_to(dst+1+dim+extra+nparam, src, 1);
  36         copy_values_to(dst+1+dim+extra, src+1, nparam);
  37         copy_values_to(dst+1, src+1+nparam, dim);
  38         copy_values_to(dst+1+dim, src+1+nparam+dim, extra);
  39 }
  40
  41 static int add_equality(struct isl_ctx *ctx, struct isl_basic_map *bmap,
  42                          Value *constraint)
  43 {
  44         unsigned nparam;
  45         unsigned n_in;
  46         unsigned n_out;
  47         int i = isl_basic_map_alloc_equality(bmap);
  48         if (i < 0)
  49                 return -1;
  50         nparam = isl_basic_map_n_param(bmap);
  51         n_in = isl_basic_map_n_in(bmap);
  52         n_out = isl_basic_map_n_out(bmap);
  53         copy_constraint_from(bmap->eq[i], constraint, nparam,
  54                              n_in + n_out, bmap->extra);
  55         return 0;
  56 }
  57
  58 static int add_inequality(struct isl_ctx *ctx, struct isl_basic_map *bmap,
  59                          Value *constraint)
  60 {
  61         unsigned nparam;
  62         unsigned n_in;
  63         unsigned n_out;
  64         int i = isl_basic_map_alloc_inequality(bmap);
  65         if (i < 0)
  66                 return -1;
  67         nparam = isl_basic_map_n_param(bmap);
  68         n_in = isl_basic_map_n_in(bmap);
  69         n_out = isl_basic_map_n_out(bmap);
  70         copy_constraint_from(bmap->ineq[i], constraint, nparam,
  71                              n_in + n_out, bmap->extra);
  72         return 0;
  73 }
  74
  75 static struct isl_basic_map *copy_constraints(
  76                         struct isl_ctx *ctx, struct isl_basic_map *bmap,
  77                         Polyhedron *P)
  78 {
  79         int i;
  80         unsigned total = isl_basic_map_total_dim(bmap);
  81
  82         for (i = 0; i < P->NbConstraints; ++i) {
  83                 if (value_zero_p(P->Constraint[i][0])) {
  84                         if (add_equality(ctx, bmap, P->Constraint[i]))
  85                                 goto error;
  86                 } else {
  87                         if (add_inequality(ctx, bmap, P->Constraint[i]))
  88                                 goto error;
  89                 }
  90         }
  91         for (i = 0; i < bmap->extra; ++i) {
  92                 int j = isl_basic_map_alloc_div(bmap);
  93                 if (j == -1)
  94                         goto error;
  95                 isl_seq_clr(bmap->div[j], 1+1+total);
  96         }
  97         return bmap;
  98 error:
  99         isl_basic_map_free(bmap);
 100         return NULL;
 101 }
 102
 103 struct isl_basic_set *isl_basic_set_new_from_polylib(
 104                         struct isl_ctx *ctx,
 105                         Polyhedron *P, unsigned nparam, unsigned dim)
 106 {
 107         return (struct isl_basic_set *)
 108                 isl_basic_map_new_from_polylib(ctx, P, nparam, 0, dim);
 109 }
 110
 111 struct isl_basic_map *isl_basic_map_new_from_polylib(
 112                         struct isl_ctx *ctx, Polyhedron *P,
 113                         unsigned nparam, unsigned in, unsigned out)
 114 {
 115         struct isl_basic_map *bmap;
 116         unsigned extra;
 117
 118         isl_assert(ctx, P, return NULL);
 119         isl_assert(ctx, P->Dimension >= nparam + in + out, return NULL);
 120
 121         extra = P->Dimension - nparam - in - out;
 122         bmap = isl_basic_map_alloc(ctx, nparam, in, out, extra,
 123                                         P->NbEq, P->NbConstraints - P->NbEq);
 124         if (!bmap)
 125                 return NULL;
 126
 127         bmap = copy_constraints(ctx, bmap, P);
 128         bmap = isl_basic_map_simplify(bmap);
 129         return isl_basic_map_finalize(bmap);
 130 }
 131
 132 struct isl_set *isl_set_new_from_polylib(struct isl_ctx *ctx,
 133                         Polyhedron *D, unsigned nparam, unsigned dim)
 134 {
 135         struct isl_set *set = NULL;
 136         Polyhedron *P;
 137         int n = 0;
 138
 139         for (P = D; P; P = P->next)
 140                 ++n;
 141
 142         set = isl_set_alloc(ctx, nparam, dim, n, ISL_MAP_DISJOINT);
 143         if (!set)
 144                 return NULL;
 145
 146         for (P = D; P; P = P->next)
 147                 isl_set_add(set,
 148                     isl_basic_set_new_from_polylib(ctx, P, nparam, dim));
 149         set = isl_set_remove_empty_parts(set);
 150         return set;
 151 }
 152
 153 struct isl_map *isl_map_new_from_polylib(struct isl_ctx *ctx,
 154                         Polyhedron *D,
 155                         unsigned nparam, unsigned in, unsigned out)
 156 {
 157         struct isl_map *map = NULL;
 158         Polyhedron *P;
 159         int n = 0;
 160
 161         for (P = D; P; P = P->next)
 162                 ++n;
 163
 164         map = isl_map_alloc(ctx, nparam, in, out, n, ISL_MAP_DISJOINT);
 165         if (!map)
 166                 return NULL;
 167
 168         for (P = D; P; P = P->next)
 169                 isl_map_add(map, isl_basic_map_new_from_polylib(ctx, P,
 170                                                             nparam, in, out));
 171         map = isl_map_remove_empty_parts(map);
 172         return map;
 173 }
 174
 175 Polyhedron *isl_basic_map_to_polylib(struct isl_basic_map *bmap)
 176 {
 177         int i;
 178         Matrix *M;
 179         Polyhedron *P;
 180         unsigned off;
 181         unsigned nparam;
 182         unsigned n_in;
 183         unsigned n_out;
 184
 185         if (!bmap)
 186                 return NULL;
 187
 188         nparam = isl_basic_map_n_param(bmap);
 189         n_in = isl_basic_map_n_in(bmap);
 190         n_out = isl_basic_map_n_out(bmap);
 191         M = Matrix_Alloc(bmap->n_eq + bmap->n_ineq,
 192                  1 + n_in + n_out + bmap->n_div + nparam + 1);
 193         for (i = 0; i < bmap->n_eq; ++i) {
 194                 value_set_si(M->p[i][0], 0);
 195                 copy_constraint_to(M->p[i], bmap->eq[i],
 196                            nparam, n_in + n_out, bmap->n_div);
 197         }
 198         off = bmap->n_eq;
 199         for (i = 0; i < bmap->n_ineq; ++i) {
 200                 value_set_si(M->p[off+i][0], 1);
 201                 copy_constraint_to(M->p[off+i], bmap->ineq[i],
 202                            nparam, n_in + n_out, bmap->n_div);
 203         }
 204         P = Constraints2Polyhedron(M, bmap->ctx->MaxRays);
 205         Matrix_Free(M);
 206
 207         return P;
 208 }
 209
 210 Polyhedron *isl_map_to_polylib(struct isl_map *map)
 211 {
 212         int i;
 213         Polyhedron *R = NULL;
 214         Polyhedron **next = &R;
 215
 216         if (!map)
 217                 return NULL;
 218
 219         for (i = 0; i < map->n; ++i) {
 220                 *next = isl_basic_map_to_polylib(map->p[i]);
 221                 next = &(*next)->next;
 222         }
 223
 224         return R ? R : Empty_Polyhedron(isl_dim_total(map->dim));
 225 }
 226
 227 Polyhedron *isl_basic_set_to_polylib(struct isl_basic_set *bset)
 228 {
 229         return isl_basic_map_to_polylib((struct isl_basic_map *)bset);
 230 }
 231
 232 Polyhedron *isl_set_to_polylib(struct isl_set *set)
 233 {
 234         return isl_map_to_polylib((struct isl_map *)set);
 235 }