isl_multi_dims.c

   1 /*
   2  * Copyright 2011      Sven Verdoolaege
   3  * Copyright 2012-2013 Ecole Normale Superieure
   4  *
   5  * Use of this software is governed by the MIT license
   6  *
   7  * Written by Sven Verdoolaege,
   8  * Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
   9  */
  10
  11 #include <isl_space_private.h>
  12
  13 #include <isl_multi_macro.h>
  14
  15 /* Check whether "multi" has non-zero coefficients for any dimension
  16  * in the given range or if any of these dimensions appear
  17  * with non-zero coefficients in any of the integer divisions involved.
  18  */
  19 isl_bool FN(MULTI(BASE),involves_dims)(__isl_keep MULTI(BASE) *multi,
  20         enum isl_dim_type type, unsigned first, unsigned n)
  21 {
  22         int i;
  23
  24         if (!multi)
  25                 return isl_bool_error;
  26         if (n == 0)
  27                 return isl_bool_false;
  28
  29         for (i = 0; i < multi->n; ++i) {
  30                 isl_bool involves;
  31
  32                 involves = FN(EL,involves_dims)(multi->u.p[i], type, first, n);
  33                 if (involves < 0 || involves)
  34                         return involves;
  35         }
  36
  37         if (FN(MULTI(BASE),has_explicit_domain)(multi))
  38                 return FN(MULTI(BASE),involves_explicit_domain_dims)(multi,
  39                                                                 type, first, n);
  40
  41         return isl_bool_false;
  42 }
  43
  44 __isl_give MULTI(BASE) *FN(MULTI(BASE),insert_dims)(
  45         __isl_take MULTI(BASE) *multi,
  46         enum isl_dim_type type, unsigned first, unsigned n)
  47 {
  48         isl_space *space;
  49         isl_size size;
  50         int i;
  51
  52         size = FN(MULTI(BASE),size)(multi);
  53         if (size < 0)
  54                 return FN(MULTI(BASE),free)(multi);
  55         if (type == isl_dim_out)
  56                 isl_die(FN(MULTI(BASE),get_ctx)(multi), isl_error_invalid,
  57                         "cannot insert output/set dimensions",
  58                         return FN(MULTI(BASE),free)(multi));
  59         if (n == 0 && !isl_space_is_named_or_nested(multi->space, type))
  60                 return multi;
  61
  62         space = FN(MULTI(BASE),take_space)(multi);
  63         space = isl_space_insert_dims(space, type, first, n);
  64         multi = FN(MULTI(BASE),restore_space)(multi, space);
  65
  66         if (FN(MULTI(BASE),has_explicit_domain)(multi))
  67                 multi = FN(MULTI(BASE),insert_explicit_domain_dims)(multi,
  68                                                                 type, first, n);
  69
  70         for (i = 0; i < size; ++i) {
  71                 EL *el;
  72
  73                 el = FN(MULTI(BASE),take_at)(multi, i);
  74                 el = FN(EL,insert_dims)(el, type, first, n);
  75                 multi = FN(MULTI(BASE),restore_at)(multi, i, el);
  76         }
  77
  78         return multi;
  79 }
  80
  81 __isl_give MULTI(BASE) *FN(MULTI(BASE),add_dims)(__isl_take MULTI(BASE) *multi,
  82         enum isl_dim_type type, unsigned n)
  83 {
  84         isl_size pos;
  85
  86         pos = FN(MULTI(BASE),dim)(multi, type);
  87         if (pos < 0)
  88                 return FN(MULTI(BASE),free)(multi);
  89
  90         return FN(MULTI(BASE),insert_dims)(multi, type, pos, n);
  91 }
  92
  93 /* Project the domain of "multi" onto its parameter space.
  94  * "multi" may not involve any of the domain dimensions.
  95  */
  96 __isl_give MULTI(BASE) *FN(MULTI(BASE),project_domain_on_params)(
  97         __isl_take MULTI(BASE) *multi)
  98 {
  99         isl_size n;
 100         isl_bool involves;
 101         isl_space *space;
 102
 103         n = FN(MULTI(BASE),dim)(multi, isl_dim_in);
 104         if (n < 0)
 105                 return FN(MULTI(BASE),free)(multi);
 106         involves = FN(MULTI(BASE),involves_dims)(multi, isl_dim_in, 0, n);
 107         if (involves < 0)
 108                 return FN(MULTI(BASE),free)(multi);
 109         if (involves)
 110                 isl_die(FN(MULTI(BASE),get_ctx)(multi), isl_error_invalid,
 111                     "expression involves some of the domain dimensions",
 112                     return FN(MULTI(BASE),free)(multi));
 113         multi = FN(MULTI(BASE),drop_dims)(multi, isl_dim_in, 0, n);
 114         space = FN(MULTI(BASE),get_domain_space)(multi);
 115         space = isl_space_params(space);
 116         multi = FN(MULTI(BASE),reset_domain_space)(multi, space);
 117         return multi;
 118 }