move raytracing to a new directory

Makefile

@@ -1,18 +1,22 @@
-CFLAGS = -Isaturn -Imath
+CFLAGS = -Isaturn
-OPT = -O1
+OPT = -Os
-
 LIBGCC = $(shell $(CC) -print-file-name=libgcc.a)
 
-all: raytracing.iso
+all: raytracing.iso vdp2.iso
 
 LIB = ./saturn
 include $(LIB)/common.mk
 
-sh/lib1funcs.o: CFLAGS += -DL_ashiftrt
+sh/lib1funcs.o: CFLAGS += -DL_ashiftrt -DL_movmem
 
-raytracing.elf: main-saturn.o raytracing.o sh/lib1funcs.o
+raytracing/raytracing.elf: CFLAGS += -Imath -DUSE_SH2_DVSR
+raytracing/raytracing.elf: raytracing/main-saturn.o raytracing/raytracing.o sh/lib1funcs.o
 
 # clean
 clean: clean-sh
 clean-sh:
-	rm -f sh/*.o
+	find -P \
+		-not -path './saturn/*' \
+		-regextype posix-egrep \
+		-regex '.*\.(iso|o|bin|elf|cue)$$' \
+		-exec rm {} \;