isl_div.c

   1 #include <isl_div.h>
   2 #include <isl_map.h>
   3 #include "isl_map_private.h"
   4
   5 static unsigned n(struct isl_div *d, enum isl_dim_type type)
   6 {
   7         struct isl_dim *dim = d->bmap->dim;
   8         switch (type) {
   9         case isl_dim_param:     return dim->nparam;
  10         case isl_dim_in:        return dim->n_in;
  11         case isl_dim_out:       return dim->n_out;
  12         case isl_dim_div:       return d->bmap->n_div;
  13         }
  14 }
  15
  16 static unsigned offset(struct isl_div *d, enum isl_dim_type type)
  17 {
  18         struct isl_dim *dim = d->bmap->dim;
  19         switch (type) {
  20         case isl_dim_param: return 1 + 1;
  21         case isl_dim_in:    return 1 + 1 + dim->nparam;
  22         case isl_dim_out:   return 1 + 1 + dim->nparam + dim->n_in;
  23         case isl_dim_div:   return 1 + 1 + dim->nparam + dim->n_in + dim->n_out;
  24         }
  25 }
  26
  27 struct isl_div *isl_basic_map_div(struct isl_basic_map *bmap, isl_int **line)
  28 {
  29         struct isl_div *div;
  30
  31         if (!bmap || !line)
  32                 goto error;
  33
  34         div = isl_alloc_type(bmap->ctx, struct isl_div);
  35         if (!div)
  36                 goto error;
  37
  38         div->ctx = bmap->ctx;
  39         isl_ctx_ref(div->ctx);
  40         div->ref = 1;
  41         div->bmap = bmap;
  42         div->line = line;
  43
  44         return div;
  45 error:
  46         isl_basic_map_free(bmap);
  47         return NULL;
  48 }
  49
  50 struct isl_div *isl_div_alloc(struct isl_dim *dim)
  51 {
  52         struct isl_basic_map *bmap;
  53
  54         if (!dim)
  55                 return NULL;
  56
  57         bmap = isl_basic_map_alloc_dim(dim, 1, 0, 0);
  58         if (!bmap)
  59                 return NULL;
  60
  61         isl_basic_map_alloc_div(bmap);
  62         isl_seq_clr(bmap->div[0], 1 + 1 + isl_basic_map_total_dim(bmap));
  63         return isl_basic_map_div(bmap, &bmap->div[0]);
  64 }
  65
  66 struct isl_div *isl_div_free(struct isl_div *c)
  67 {
  68         if (!c)
  69                 return;
  70
  71         if (--c->ref > 0)
  72                 return;
  73
  74         isl_basic_map_free(c->bmap);
  75         isl_ctx_deref(c->ctx);
  76         free(c);
  77 }
  78
  79 void isl_div_get_constant(struct isl_div *div, isl_int *v)
  80 {
  81         if (!div)
  82                 return;
  83         isl_int_set(*v, div->line[0][1]);
  84 }
  85
  86 void isl_div_get_denominator(struct isl_div *div, isl_int *v)
  87 {
  88         if (!div)
  89                 return;
  90         isl_int_set(*v, div->line[0][0]);
  91 }
  92
  93 void isl_div_get_coefficient(struct isl_div *div,
  94         enum isl_dim_type type, int pos, isl_int *v)
  95 {
  96         if (!div)
  97                 return;
  98
  99         isl_assert(div->ctx, pos < n(div, type), return);
 100         isl_int_set(*v, div->line[0][offset(div, type) + pos]);
 101 }
 102
 103 void isl_div_set_constant(struct isl_div *div, isl_int v)
 104 {
 105         if (!div)
 106                 return;
 107         isl_int_set(div->line[0][1], v);
 108 }
 109
 110 void isl_div_set_denominator(struct isl_div *div, isl_int v)
 111 {
 112         if (!div)
 113                 return;
 114         isl_int_set(div->line[0][0], v);
 115 }
 116
 117 void isl_div_set_coefficient(struct isl_div *div,
 118         enum isl_dim_type type, int pos, isl_int v)
 119 {
 120         if (!div)
 121                 return;
 122
 123         isl_assert(div->ctx, pos < n(div, type), return);
 124         isl_int_set(div->line[0][offset(div, type) + pos], v);
 125 }