[x265] [PATCH] ipfilter : extendCURowColBorder() performance tuning

[Gopu Govindaswamy]

# HG changeset patch
# User Gopu Govindaswamy <gopu at multicorewareinc.com>
# Date 1378208206 -19800
# Node ID bba9aca5c360a3faf62507f4c95b784fc2adbecc
# Parent  9a2eaa27b17476c798c831a15af019a7148c6735
ipfilter : extendCURowColBorder() performance tuning

diff -r 9a2eaa27b174 -r bba9aca5c360 source/common/ipfilter.cpp
--- a/source/common/ipfilter.cpp	Tue Sep 03 14:36:20 2013 +0530
+++ b/source/common/ipfilter.cpp	Tue Sep 03 17:06:46 2013 +0530
@@ -459,15 +459,18 @@
 
 void extendCURowColBorder(pixel* txt, intptr_t stride, int width, int height, int marginX)
 {
-    int   x, y;
-
-    for (y = 0; y < height; y++)
+    for (int y = 0; y < height; y++)
     {
-        for (x = 0; x < marginX; x++)
+#if HIGH_BIT_DEPTH
+        for (int x = 0; x < marginX; x++)
         {
             txt[-marginX + x] = txt[0];
             txt[width + x] = txt[width - 1];
         }
+#else
+        ::memset(txt - marginX, txt[0], marginX);
+        ::memset(txt + width, txt[width - 1], marginX);
+#endif
 
         txt += stride;
     }