Greatly improved multiplication routine. Optimized the generic 16x16 one and

added special cases for 8x16 and 8x8. The former is directly called by the
compiler as tosmula0 and tosumula0 resp.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4036 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/runtime/Makefile

@@ -152,6 +152,7 @@ OBJS = 	add.o		\
        	makebool.o	\
        	mod.o  		\
        	mul.o  		\
+        mul8.o          \
 	mulax3.o	\
 	mulax5.o	\
 	mulax6.o	\