From aa761b160520479efcf09d12ae4a161fc2f872f7 Mon Sep 17 00:00:00 2001
From: Brian <brian.paul@tungstengraphics.com>
Date: Fri, 1 Feb 2008 16:54:46 -0700
Subject: Cell: comment about emit_quad() mask

---
 src/mesa/pipe/cell/spu/spu_tri.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mesa/pipe/cell/spu/spu_tri.c b/src/mesa/pipe/cell/spu/spu_tri.c
index f0758c42e7..83bb247b22 100644
--- a/src/mesa/pipe/cell/spu/spu_tri.c
+++ b/src/mesa/pipe/cell/spu/spu_tri.c
@@ -277,6 +277,9 @@ do_depth_test(int x, int y, mask_t quadmask)
 
 /**
  * Emit a quad (pass to next stage).  No clipping is done.
+ * Note: about 1/5 to 1/7 of the time, mask is zero and this function
+ * should be skipped.  But adding the test for that slows things down
+ * overall.
  */
 static INLINE void
 emit_quad( int x, int y, mask_t mask )
-- 
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