isl_param_util.c

   1 #include <isl_aff_polylib.h>
   2 #include <isl_set_polylib.h>
   3 #include <isl/vertices.h>
   4 #include "isl_param_util.h"
   5
   6 static Matrix *expr2vertex(Polyhedron *E, unsigned nvar)
   7 {
   8         int i;
   9         Matrix *M;
  10         unsigned nparam = E->Dimension - nvar;
  11         Value mone;
  12
  13         value_init(mone);
  14         value_set_si(mone, -1);
  15         M = Matrix_Alloc(nvar, nparam + 1 + 1);
  16         for (i = 0; i < nvar; ++i) {
  17                 Vector_Scale(E->Constraint[i] + 1 + nvar, M->p[i],
  18                                 mone, nparam + 1);
  19                 value_assign(M->p[i][nparam + 1], E->Constraint[i][1 + i]);
  20         }
  21         value_clear(mone);
  22
  23         return M;
  24 }
  25
  26 #define INT_BITS (sizeof(unsigned) * 8)
  27
  28 static int add_vertex(__isl_take isl_vertex *vertex, void *user)
  29 {
  30         Param_Vertices ***next_V = (Param_Vertices ***) user;
  31         Param_Vertices *V;
  32         Polyhedron *D;
  33         isl_basic_set *dom;
  34         isl_multi_aff *expr;
  35         isl_ctx *ctx;
  36
  37         ctx = isl_vertex_get_ctx(vertex);
  38
  39         dom = isl_vertex_get_domain(vertex);
  40         D = isl_basic_set_to_polylib(dom);
  41         isl_basic_set_free(dom);
  42
  43         expr = isl_vertex_get_expr(vertex);
  44
  45         V = isl_alloc_type(ctx, Param_Vertices);
  46         V->Vertex = isl_multi_aff_to_polylib(expr);
  47         V->Domain = Polyhedron2Constraints(D);
  48         V->Facets = NULL;
  49         V->next = NULL;
  50
  51         Polyhedron_Free(D);
  52         isl_multi_aff_free(expr);
  53
  54         **next_V = V;
  55         *next_V = &V->next;
  56
  57         isl_vertex_free(vertex);
  58
  59         return 0;
  60 }
  61
  62 struct bv_add_chamber_data {
  63         Param_Domain **next_D;
  64         int vertex_len;
  65         Param_Domain *dom;
  66 };
  67
  68 static int add_chamber_vertex(__isl_take isl_vertex *vertex, void *user)
  69 {
  70         int j;
  71         struct bv_add_chamber_data *data = (struct bv_add_chamber_data *)user;
  72         unsigned v;
  73
  74         v = isl_vertex_get_id(vertex);
  75         data->dom->F[v / INT_BITS] |= 1u << (INT_BITS - (v % INT_BITS) - 1);
  76
  77         isl_vertex_free(vertex);
  78
  79         return 0;
  80 }
  81
  82 static int add_chamber(__isl_take isl_cell *cell, void *user)
  83 {
  84         struct bv_add_chamber_data *data = (struct bv_add_chamber_data *)user;
  85         isl_ctx *ctx;
  86         isl_basic_set *domain;
  87
  88         ctx = isl_cell_get_ctx(cell);
  89
  90         domain = isl_cell_get_domain(cell);
  91
  92         data->dom = isl_alloc_type(ctx, Param_Domain);
  93         data->dom->Domain = isl_basic_set_to_polylib(domain);
  94         data->dom->F = isl_calloc_array(ctx, unsigned, data->vertex_len);
  95         data->dom->next = NULL;
  96
  97         isl_basic_set_free(domain);
  98
  99         *data->next_D = data->dom;
 100         data->next_D = &data->dom->next;
 101
 102         isl_cell_foreach_vertex(cell, &add_chamber_vertex, data);
 103
 104         isl_cell_free(cell);
 105
 106         return 0;
 107 }
 108
 109 Param_Polyhedron *ISL_P2PP(Polyhedron *P, Polyhedron *C,
 110                           struct barvinok_options *options)
 111 {
 112         int i, j;
 113         isl_ctx *ctx = isl_ctx_alloc();
 114         isl_space *dim;
 115         isl_basic_set *bset, *context;
 116         isl_vertices *vertices;
 117         unsigned nparam = C->Dimension;
 118         unsigned nvar = P->Dimension - nparam;
 119         Param_Polyhedron *PP = isl_calloc_type(ctx, Param_Polyhedron);
 120         Param_Vertices **next_V;
 121         struct bv_add_chamber_data data;
 122
 123         dim = isl_space_set_alloc(ctx, nparam, nvar);
 124         bset = isl_basic_set_new_from_polylib(P, dim);
 125         dim = isl_space_set_alloc(ctx, nparam, 0);
 126         context = isl_basic_set_new_from_polylib(C, dim);
 127
 128         bset = isl_basic_set_intersect(bset, context);
 129
 130         vertices = isl_basic_set_compute_vertices(bset);
 131         isl_basic_set_free(bset);
 132
 133         PP->Rays = NULL;
 134         PP->nbV = isl_vertices_get_n_vertices(vertices);
 135         PP->Constraints = Polyhedron2Constraints(P);
 136
 137         next_V = &PP->V;
 138         isl_vertices_foreach_vertex(vertices, &add_vertex, &next_V);
 139
 140         data.next_D = &PP->D;
 141         data.vertex_len = (PP->nbV + INT_BITS - 1)/INT_BITS;
 142         isl_vertices_foreach_cell(vertices, &add_chamber, &data);
 143
 144         isl_vertices_free(vertices);
 145
 146         isl_ctx_free(ctx);
 147
 148         return PP;
 149 }