X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=isl_aff.c;h=51f95c89ea86d642aa3b0553e62fcbdca401f189;hb=63fb8a7f484648c3caa25351c8c94ac2395ec563;hp=b7dc28ac705ec02732d3af0b40ce2bb97cb31ddb;hpb=e191c804b86c9d7fccd8f6af8840baeb581c99f9;p=platform%2Fupstream%2Fisl.git

diff --git a/isl_aff.c b/isl_aff.c
index b7dc28a..51f95c8 100644
--- a/isl_aff.c
+++ b/isl_aff.c
@@ -1311,6 +1311,37 @@ __isl_give isl_aff *isl_aff_mod(__isl_take isl_aff *aff, isl_int m)
 
 /* Compute
  *
+ *	aff mod m = aff - m * floor(aff/m)
+ *
+ * with m an integer value.
+ */
+__isl_give isl_aff *isl_aff_mod_val(__isl_take isl_aff *aff,
+	__isl_take isl_val *m)
+{
+	isl_aff *res;
+
+	if (!aff || !m)
+		goto error;
+
+	if (!isl_val_is_int(m))
+		isl_die(isl_val_get_ctx(m), isl_error_invalid,
+			"expecting integer modulo", goto error);
+
+	res = isl_aff_copy(aff);
+	aff = isl_aff_scale_down_val(aff, isl_val_copy(m));
+	aff = isl_aff_floor(aff);
+	aff = isl_aff_scale_val(aff, m);
+	res = isl_aff_sub(res, aff);
+
+	return res;
+error:
+	isl_aff_free(aff);
+	isl_val_free(m);
+	return NULL;
+}
+
+/* Compute
+ *
  *	pwaff mod m = pwaff - m * floor(pwaff/m)
  */
 __isl_give isl_pw_aff *isl_pw_aff_mod(__isl_take isl_pw_aff *pwaff, isl_int m)
@@ -1574,6 +1605,37 @@ __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;