X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=isl_map.c;h=164e075d142f0a31d392b267ae276e609d8a735c;hb=7bc3560a92635b5dcf7eb9e7329992fc935a1ce2;hp=f5e95d16c091a0035f3263abbb6b2bdf797bf555;hpb=d44fb55aa49dc3076f59434db5cec254c1d39a4f;p=platform%2Fupstream%2Fisl.git

diff --git a/isl_map.c b/isl_map.c
index f5e95d1..164e075 100644
--- a/isl_map.c
+++ b/isl_map.c
@@ -3852,6 +3852,26 @@ error:
 	return NULL;
 }
 
+/* Given a map A -> f(A) and an integer d, construct a map
+ * A -> floor(f(A)/d).
+ */
+__isl_give isl_map *isl_map_floordiv_val(__isl_take isl_map *map,
+	__isl_take isl_val *d)
+{
+	if (!map || !d)
+		goto error;
+	if (!isl_val_is_int(d))
+		isl_die(isl_val_get_ctx(d), isl_error_invalid,
+			"expecting integer denominator", goto error);
+	map = isl_map_floordiv(map, d->n);
+	isl_val_free(d);
+	return map;
+error:
+	isl_map_free(map);
+	isl_val_free(d);
+	return NULL;
+}
+
 static struct isl_basic_map *var_equal(struct isl_basic_map *bmap, unsigned pos)
 {
 	int i;
@@ -8443,6 +8463,35 @@ int isl_basic_map_plain_is_fixed(__isl_keep isl_basic_map *bmap,
 		isl_basic_map_offset(bmap, type) - 1 + pos, val);
 }
 
+/* If "bmap" obviously lies on a hyperplane where the given dimension
+ * has a fixed value, then return that value.
+ * Otherwise return NaN.
+ */
+__isl_give isl_val *isl_basic_map_plain_get_val_if_fixed(
+	__isl_keep isl_basic_map *bmap,
+	enum isl_dim_type type, unsigned pos)
+{
+	isl_ctx *ctx;
+	isl_val *v;
+	int fixed;
+
+	if (!bmap)
+		return NULL;
+	ctx = isl_basic_map_get_ctx(bmap);
+	v = isl_val_alloc(ctx);
+	if (!v)
+		return NULL;
+	fixed = isl_basic_map_plain_is_fixed(bmap, type, pos, &v->n);
+	if (fixed < 0)
+		return isl_val_free(v);
+	if (fixed) {
+		isl_int_set_si(v->d, 1);
+		return v;
+	}
+	isl_val_free(v);
+	return isl_val_nan(ctx);
+}
+
 int isl_map_plain_is_fixed(__isl_keep isl_map *map,
 	enum isl_dim_type type, unsigned pos, isl_int *val)
 {
@@ -8452,6 +8501,44 @@ int isl_map_plain_is_fixed(__isl_keep isl_map *map,
 		map_offset(map, type) - 1 + pos, val);
 }
 
+/* If "map" obviously lies on a hyperplane where the given dimension
+ * has a fixed value, then return that value.
+ * Otherwise return NaN.
+ */
+__isl_give isl_val *isl_map_plain_get_val_if_fixed(__isl_keep isl_map *map,
+	enum isl_dim_type type, unsigned pos)
+{
+	isl_ctx *ctx;
+	isl_val *v;
+	int fixed;
+
+	if (!map)
+		return NULL;
+	ctx = isl_map_get_ctx(map);
+	v = isl_val_alloc(ctx);
+	if (!v)
+		return NULL;
+	fixed = isl_map_plain_is_fixed(map, type, pos, &v->n);
+	if (fixed < 0)
+		return isl_val_free(v);
+	if (fixed) {
+		isl_int_set_si(v->d, 1);
+		return v;
+	}
+	isl_val_free(v);
+	return isl_val_nan(ctx);
+}
+
+/* If "set" obviously lies on a hyperplane where the given dimension
+ * has a fixed value, then return that value.
+ * Otherwise return NaN.
+ */
+__isl_give isl_val *isl_set_plain_get_val_if_fixed(__isl_keep isl_set *set,
+	enum isl_dim_type type, unsigned pos)
+{
+	return isl_map_plain_get_val_if_fixed(set, type, pos);
+}
+
 int isl_set_plain_is_fixed(__isl_keep isl_set *set,
 	enum isl_dim_type type, unsigned pos, isl_int *val)
 {