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 #define INT_BITS (sizeof(unsigned) * 8)
   7
   8 static isl_stat add_vertex(__isl_take isl_vertex *vertex, void *user)
   9 {
  10         Param_Vertices ***next_V = (Param_Vertices ***) user;
  11         Param_Vertices *V;
  12         Polyhedron *D;
  13         isl_basic_set *dom;
  14         isl_multi_aff *expr;
  15         isl_ctx *ctx;
  16
  17         ctx = isl_vertex_get_ctx(vertex);
  18
  19         dom = isl_vertex_get_domain(vertex);
  20         D = isl_basic_set_to_polylib(dom);
  21         isl_basic_set_free(dom);
  22
  23         expr = isl_vertex_get_expr(vertex);
  24
  25         V = isl_alloc_type(ctx, Param_Vertices);
  26         V->Vertex = isl_multi_aff_to_polylib(expr);
  27         V->Domain = Polyhedron2Constraints(D);
  28         V->Facets = NULL;
  29         V->next = NULL;
  30
  31         Polyhedron_Free(D);
  32         isl_multi_aff_free(expr);
  33
  34         **next_V = V;
  35         *next_V = &V->next;
  36
  37         isl_vertex_free(vertex);
  38
  39         return isl_stat_ok;
  40 }
  41
  42 struct bv_add_chamber_data {
  43         Param_Domain **next_D;
  44         int vertex_len;
  45         Param_Domain *dom;
  46 };
  47
  48 static isl_stat add_chamber_vertex(__isl_take isl_vertex *vertex, void *user)
  49 {
  50         struct bv_add_chamber_data *data = (struct bv_add_chamber_data *)user;
  51         unsigned v;
  52
  53         v = isl_vertex_get_id(vertex);
  54         data->dom->F[v / INT_BITS] |= 1u << (INT_BITS - (v % INT_BITS) - 1);
  55
  56         isl_vertex_free(vertex);
  57
  58         return isl_stat_ok;
  59 }
  60
  61 static isl_stat add_chamber(__isl_take isl_cell *cell, void *user)
  62 {
  63         struct bv_add_chamber_data *data = (struct bv_add_chamber_data *)user;
  64         isl_ctx *ctx;
  65         isl_basic_set *domain;
  66
  67         ctx = isl_cell_get_ctx(cell);
  68
  69         domain = isl_cell_get_domain(cell);
  70
  71         data->dom = isl_alloc_type(ctx, Param_Domain);
  72         data->dom->Domain = isl_basic_set_to_polylib(domain);
  73         data->dom->F = isl_calloc_array(ctx, unsigned, data->vertex_len);
  74         data->dom->next = NULL;
  75
  76         isl_basic_set_free(domain);
  77
  78         *data->next_D = data->dom;
  79         data->next_D = &data->dom->next;
  80
  81         isl_cell_foreach_vertex(cell, &add_chamber_vertex, data);
  82
  83         isl_cell_free(cell);
  84
  85         return isl_stat_ok;
  86 }
  87
  88 Param_Polyhedron *ISL_P2PP(Polyhedron *P, Polyhedron *C,
  89                           struct barvinok_options *options)
  90 {
  91         isl_ctx *ctx = isl_ctx_alloc();
  92         isl_space *space;
  93         isl_basic_set *bset, *context;
  94         isl_vertices *vertices;
  95         unsigned nparam = C->Dimension;
  96         unsigned nvar = P->Dimension - nparam;
  97         Param_Polyhedron *PP = isl_calloc_type(ctx, Param_Polyhedron);
  98         Param_Vertices **next_V;
  99         struct bv_add_chamber_data data;
 100
 101         space = isl_space_set_alloc(ctx, nparam, nvar);
 102         bset = isl_basic_set_new_from_polylib(P, space);
 103         space = isl_space_params_alloc(ctx, nparam);
 104         context = isl_basic_set_new_from_polylib(C, space);
 105
 106         bset = isl_basic_set_intersect_params(bset, context);
 107
 108         vertices = isl_basic_set_compute_vertices(bset);
 109         isl_basic_set_free(bset);
 110
 111         PP->Rays = NULL;
 112         PP->nbV = isl_vertices_get_n_vertices(vertices);
 113         PP->Constraints = Polyhedron2Constraints(P);
 114
 115         next_V = &PP->V;
 116         isl_vertices_foreach_vertex(vertices, &add_vertex, &next_V);
 117
 118         data.next_D = &PP->D;
 119         data.vertex_len = (PP->nbV + INT_BITS - 1)/INT_BITS;
 120         isl_vertices_foreach_cell(vertices, &add_chamber, &data);
 121
 122         isl_vertices_free(vertices);
 123
 124         isl_ctx_free(ctx);
 125
 126         return PP;
 127 }