Adding Vortex Yosys build support

hw/syn/yosys/Makefile

@@ -0,0 +1,17 @@
+PROJECT = Vortex
+TOP_LEVEL_ENTITY = Vortex
+SRC_FILE = Vortex.v
+RTL_DIR = ../../rtl
+
+DEFINES = -DNDEBUG -DSYNTHESIS -DEXT_F_DISABLE -DNUM_CORES=1 -DNUM_THREADS=2 -DNUM_WARPS=2
+
+RTL_INCLUDE = -I$(RTL_DIR) -I$(RTL_DIR)/libs -I$(RTL_DIR)/interfaces -I$(RTL_DIR)/cache
+
+# Build targets
+all: build
+
+build:
+	./synth.sh -t$(TOP_LEVEL_ENTITY) -s$(SRC_FILE) $(DEFINES) $(RTL_INCLUDE)
+
+clean:
+	rm -rf sources.v *.ys *.log