Decompose complex lines.

Create a bunch of const variables to better profile.

Makefile

@@ -1,9 +1,8 @@
 include Makefile.rules
 
 CXXFLAGS  = -std=c++11 -W -Wall -O3 -ffast-math -g $(CXXFLAGS_PLAFORM)
-LFLAGS    = #-flto
 DEFINES   = #-DSIMD
-BUILD_DIR = /tmp
+BUILD_DIR = .
 SRC       = rotation.cpp \
 	    image.cpp \
             pnm.cpp
@@ -19,7 +18,7 @@ all: $(OBJS)
 	$(CXX) $(CXXFLAGS) $(DEFINES) $< -c -o $@
 
 clean:
-	@rm -f *~ *.o .*.swp *.ppm *.pgm *.pnm cachegrind.out.*
+	@rm -f rotation *~ *.o .*.swp *.ppm *.pgm *.pnm cachegrind.out.* callgrind.out.*
 
 run: all
 	$(BUILD_DIR)/rotation $(IMG)