From 1a7b57c347f68ab2ce072c7f316e01f09c3ecba5 Mon Sep 17 00:00:00 2001
From: Nicolas Robidoux <nicolas.robidoux@gmail.com>
Date: Sun, 15 Mar 2009 21:04:22 +0000
Subject: [PATCH] instruction scheduling tweaks

---
 libsrc/resample/nohalo.cpp | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/libsrc/resample/nohalo.cpp b/libsrc/resample/nohalo.cpp
index 5b21cec0..0d7fdbb6 100644
--- a/libsrc/resample/nohalo.cpp
+++ b/libsrc/resample/nohalo.cpp
@@ -361,8 +361,8 @@ nohalo_sharp_level_1(
   /*
    * Useful sums:
    */
-  const double twice_dos_two_plus_dos_thr = 2. * ( dos_two + dos_thr );
-  const double twice_dos_two_plus_tre_two = 2. * ( dos_two + tre_two );
+  const double dos_two_plus_dos_thr = dos_two + dos_thr;
+  const double dos_two_plus_tre_two = dos_two + tre_two;
 
   /*
    * Products useful for minmod:
@@ -393,33 +393,36 @@ nohalo_sharp_level_1(
    * pixel areas) double resolution pixel value:
    */
   const double four_times_dos_twothr =
-    twice_dos_two_plus_dos_thr
-    +
     FAST_MINMOD( deux_dos, prem_dos, deux_dos_prem_dos, deux_dos_deux_dos )
     -
-    FAST_MINMOD( deux_dos, troi_dos, deux_dos_troi_dos, deux_dos_deux_dos );
+    FAST_MINMOD( deux_dos, troi_dos, deux_dos_troi_dos, deux_dos_deux_dos )
+    +
+    2. * dos_two_plus_dos_thr;
 
   /*
    * Compute the needed "down" double resolution pixel value:
    */
   const double four_times_dostre_two =
-    twice_dos_two_plus_tre_two
-    +
     FAST_MINMOD( deux_two, prem_two, deux_two_prem_two, deux_two_deux_two )
     -
-    FAST_MINMOD( deux_two, troi_two, deux_two_troi_two, deux_two_deux_two );
+    FAST_MINMOD( deux_two, troi_two, deux_two_troi_two, deux_two_deux_two )
+    +
+    2. * dos_two_plus_tre_two;
 
   /*
    * Compute the "diagonal" (at the boundary between thrr input
    * pixel areas) double resolution pixel value:
    */
-  const double eight_times_dostre_twothr =
+  const double piece_of_eight_times_dostre_twothr =
     four_times_dos_twothr
     +
-    2. * deux_thr_plus_deux_dos
-    +
     four_times_dostre_two
     +
+    2. * deux_thr_plus_deux_dos;
+
+  const double eight_times_dostre_twothr =
+    piece_of_eight_times_dostre_twothr
+    +
     FAST_MINMOD( deux_tre, prem_tre, deux_tre_prem_tre, deux_tre_deux_tre )
     -
     FAST_MINMOD( deux_tre, troi_tre, deux_tre_troi_tre, deux_tre_deux_tre )