From 510b03539413552a543e25de6b896eb10baf60ae Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keithw@vmware.com>
Date: Sun, 15 Aug 2010 16:21:46 +0100
Subject: llvmpipe: reorganize block4 loop, nice speedup

isosurf 95->115 fps just by exchanging the two inner loops in this
function...
---
 src/gallium/drivers/llvmpipe/lp_rast_tri.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/gallium/drivers/llvmpipe/lp_rast_tri.c')

diff --git a/src/gallium/drivers/llvmpipe/lp_rast_tri.c b/src/gallium/drivers/llvmpipe/lp_rast_tri.c
index ebe9a8e92b..c1f2680ddc 100644
--- a/src/gallium/drivers/llvmpipe/lp_rast_tri.c
+++ b/src/gallium/drivers/llvmpipe/lp_rast_tri.c
@@ -113,6 +113,21 @@ block_full_16(struct lp_rasterizer_task *task,
 	 block_full_4(task, tri, x + ix, y + iy);
 }
 
+
+static INLINE unsigned
+build_mask(int c, const int *step)
+{
+   int mask = 0;
+   int i;
+
+   for (i = 0; i < 16; i++) {
+      mask |= ((c + step[i]) >> 31) & (1 << i);
+   }
+   
+   return mask;
+}
+
+
 #define TAG(x) x##_1
 #define NR_PLANES 1
 #include "lp_rast_tri_tmp.h"
-- 
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