add isl_aff_scale_val

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

diff --git a/isl_aff.c b/isl_aff.c
index 45fa93e..b7dc28a 100644 (file)
--- a/isl_aff.c
+++ b/isl_aff.c
@@ -1516,6 +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;