From ff44e765d9ab5eef72ad1973e30b4ae648fb92fa Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Tue, 5 Jul 2011 21:10:44 -0400
Subject: [PATCH] Add add_mi().

---
 sumpy/kernel_common.py | 2 +-
 sumpy/tools.py         | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/sumpy/kernel_common.py b/sumpy/kernel_common.py
index d91f5949..0940e0e7 100644
--- a/sumpy/kernel_common.py
+++ b/sumpy/kernel_common.py
@@ -14,7 +14,7 @@ COMMON_PREAMBLE = r"""//CL//
 % if double_support:
     #pragma OPENCL EXTENSION cl_khr_fp64: enable
 % endif
-#pragma OPENCL EXTENSION cl_amd_printf: enable
+## #pragma OPENCL EXTENSION cl_amd_printf: enable
 
 <%def name="load_vector_g(tgt_name, src_name, src_base_offset)">
   % for i in range(dimensions):
diff --git a/sumpy/tools.py b/sumpy/tools.py
index f1b8ee3f..b9d6c8ba 100644
--- a/sumpy/tools.py
+++ b/sumpy/tools.py
@@ -5,6 +5,9 @@ from __future__ import division
 
 # {{{ multi_index helpers
 
+def add_mi(mi1, mi2):
+    return tuple(mi1i+mi2i for mi1i, mi2i in zip(mi1, mi2))
+
 def mi_factorial(mi):
     from pytools import factorial
     result = 1
-- 
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