From 63fb8a7f484648c3caa25351c8c94ac2395ec563 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Thu, 4 Apr 2013 16:50:14 +0200
Subject: [PATCH] add isl_aff_mod_val

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 doc/user.pod      |  2 ++
 include/isl/aff.h |  2 ++
 isl_aff.c         | 31 +++++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/doc/user.pod b/doc/user.pod
index 2a15f99e..e76e451b 100644
--- a/doc/user.pod
+++ b/doc/user.pod
@@ -3783,6 +3783,8 @@ Operations include
 		__isl_take isl_pw_aff *pwaff);
 	__isl_give isl_aff *isl_aff_mod(__isl_take isl_aff *aff,
 		isl_int mod);
+	__isl_give isl_aff *isl_aff_mod_val(__isl_take isl_aff *aff,
+		__isl_take isl_val *mod);
 	__isl_give isl_pw_aff *isl_pw_aff_mod(
 		__isl_take isl_pw_aff *pwaff, isl_int mod);
 	__isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff,
diff --git a/include/isl/aff.h b/include/isl/aff.h
index 77114e33..c4ee5fe7 100644
--- a/include/isl/aff.h
+++ b/include/isl/aff.h
@@ -85,6 +85,8 @@ __isl_give isl_aff *isl_aff_neg(__isl_take isl_aff *aff);
 __isl_give isl_aff *isl_aff_ceil(__isl_take isl_aff *aff);
 __isl_give isl_aff *isl_aff_floor(__isl_take isl_aff *aff);
 __isl_give isl_aff *isl_aff_mod(__isl_take isl_aff *aff, isl_int mod);
+__isl_give isl_aff *isl_aff_mod_val(__isl_take isl_aff *aff,
+	__isl_take isl_val *mod);
 
 __isl_give isl_aff *isl_aff_mul(__isl_take isl_aff *aff1,
 	__isl_take isl_aff *aff2);
diff --git a/isl_aff.c b/isl_aff.c
index 13060f0f..51f95c89 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)
-- 
2.11.4.GIT