add isl_aff_scale_down_val

[platform/upstream/isl.git] / isl_aff.c

diff --git a/isl_aff.c b/isl_aff.c
index 3210032..13060f0 100644 (file)
--- a/isl_aff.c
+++ b/isl_aff.c
@@ -409,6 +409,19 @@ int isl_aff_get_denominator(__isl_keep isl_aff *aff, isl_int *v)
        return 0;
 }
 
+/* Return the common denominator of "aff".
+ */
+__isl_give isl_val *isl_aff_get_denominator_val(__isl_keep isl_aff *aff)
+{
+       isl_ctx *ctx;
+
+       if (!aff)
+               return NULL;
+
+       ctx = isl_aff_get_ctx(aff);
+       return isl_val_int_from_isl_int(ctx, aff->v->el[0]);
+}
+
 int isl_aff_get_constant(__isl_keep isl_aff *aff, isl_int *v)
 {
        if (!aff)
@@ -417,6 +430,21 @@ int isl_aff_get_constant(__isl_keep isl_aff *aff, isl_int *v)
        return 0;
 }
 
+/* Return the constant term of "aff".
+ */
+__isl_give isl_val *isl_aff_get_constant_val(__isl_keep isl_aff *aff)
+{
+       isl_ctx *ctx;
+       isl_val *v;
+
+       if (!aff)
+               return NULL;
+
+       ctx = isl_aff_get_ctx(aff);
+       v = isl_val_rat_from_isl_int(ctx, aff->v->el[1], aff->v->el[0]);
+       return isl_val_normalize(v);
+}
+
 int isl_aff_get_coefficient(__isl_keep isl_aff *aff,
        enum isl_dim_type type, int pos, isl_int *v)
 {
@@ -440,6 +468,35 @@ int isl_aff_get_coefficient(__isl_keep isl_aff *aff,
        return 0;
 }
 
+/* Return the coefficient of the variable of type "type" at position "pos"
+ * of "aff".
+ */
+__isl_give isl_val *isl_aff_get_coefficient_val(__isl_keep isl_aff *aff,
+       enum isl_dim_type type, int pos)
+{
+       isl_ctx *ctx;
+       isl_val *v;
+
+       if (!aff)
+               return NULL;
+
+       ctx = isl_aff_get_ctx(aff);
+       if (type == isl_dim_out)
+               isl_die(ctx, isl_error_invalid,
+                       "output/set dimension does not have a coefficient",
+                       return NULL);
+       if (type == isl_dim_in)
+               type = isl_dim_set;
+
+       if (pos >= isl_local_space_dim(aff->ls, type))
+               isl_die(ctx, isl_error_invalid,
+                       "position out of bounds", return NULL);
+
+       pos += isl_local_space_offset(aff->ls, type);
+       v = isl_val_rat_from_isl_int(ctx, aff->v->el[1 + pos], aff->v->el[0]);
+       return isl_val_normalize(v);
+}
+
 __isl_give isl_aff *isl_aff_set_denominator(__isl_take isl_aff *aff, isl_int v)
 {
        aff = isl_aff_cow(aff);
@@ -1459,6 +1516,34 @@ __isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff, isl_int f)
        return aff;
 }
 
+/* Multiple "aff" by "v".
+ */
+__isl_give isl_aff *isl_aff_scale_val(__isl_take isl_aff *aff,
+       __isl_take isl_val *v)
+{
+       if (!aff || !v)
+               goto error;
+
+       if (isl_val_is_one(v)) {
+               isl_val_free(v);
+               return aff;
+       }
+
+       if (!isl_val_is_rat(v))
+               isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
+                       "expecting rational factor", goto error);
+
+       aff = isl_aff_scale(aff, v->n);
+       aff = isl_aff_scale_down(aff, v->d);
+
+       isl_val_free(v);
+       return aff;
+error:
+       isl_aff_free(aff);
+       isl_val_free(v);
+       return NULL;
+}
+
 __isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff, isl_int f)
 {
        isl_int gcd;
@@ -1489,6 +1574,37 @@ __isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff, isl_int f)
        return aff;
 }
 
+/* Divide "aff" by "v".
+ */
+__isl_give isl_aff *isl_aff_scale_down_val(__isl_take isl_aff *aff,
+       __isl_take isl_val *v)
+{
+       if (!aff || !v)
+               goto error;
+
+       if (isl_val_is_one(v)) {
+               isl_val_free(v);
+               return aff;
+       }
+
+       if (!isl_val_is_rat(v))
+               isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
+                       "expecting rational factor", goto error);
+       if (!isl_val_is_pos(v))
+               isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
+                       "factor needs to be positive", goto error);
+
+       aff = isl_aff_scale(aff, v->d);
+       aff = isl_aff_scale_down(aff, v->n);
+
+       isl_val_free(v);
+       return aff;
+error:
+       isl_aff_free(aff);
+       isl_val_free(v);
+       return NULL;
+}
+
 __isl_give isl_aff *isl_aff_scale_down_ui(__isl_take isl_aff *aff, unsigned f)
 {
        isl_int v;