From af10db4aa47b4c3a26d3cb035355239d767f3822 Mon Sep 17 00:00:00 2001
From: Pascal Massimino <pascal.massimino@gmail.com>
Date: Sun, 29 May 2011 22:35:44 -0700
Subject: [PATCH] little speed up for VP8BitUpdate()

1% faster on average

Patch by Somnath Banerjee (somnath at google dot com)

Change-Id: I44cbc125024d3b7ba8621643e9161b72f0eac281
---
 src/dec/bits.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/dec/bits.h b/src/dec/bits.h
index e0572e4b..35bd78f3 100644
--- a/src/dec/bits.h
+++ b/src/dec/bits.h
@@ -61,15 +61,16 @@ static inline uint32_t VP8GetByte(VP8BitReader* const br) {
 
 static inline uint32_t VP8BitUpdate(VP8BitReader* const br, uint32_t split) {
   uint32_t bit;
+  const uint32_t value_split = (split + 1) << 8;
   // Make sure we have a least 8 bits in 'value_'
   if (br->missing_ > 0) {
     br->value_ |= VP8GetByte(br) << br->missing_;
     br->missing_ -= 8;
   }
-  bit = ((br->value_ >> 8) > split);
+  bit = (br->value_ >= value_split);
   if (bit) {
     br->range_ -= split + 1;
-    br->value_ -= (split + 1) << 8;
+    br->value_ -= value_split;
   } else {
     br->range_ = split;
   }