1 files changed, 8 insertions, 3 deletions
diff --git a/Makefile b/Makefile
index 55be36b..d97f6a0 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,8 @@ IVFLAGS   := -g2005-sv
 
 SIM_SRCS  := $(wildcard *_tb.v)
 SIMS      := $(SIM_SRCS:.v=.sim)
-WAVES     := $(SIM_SRCS:.v=.vcd)
+WAVES     := $(addprefix waves/,$(SIM_SRCS:.v=.vcd))
+DIRS      := waves
 
 DEPS                = $(sort $(1) $(foreach d,$(1),$(DEPS-$(d))))
 DEPS-alu           := $(call DEPS,shifter)
@@ -17,9 +18,13 @@ all: simulate
 simulate: $(WAVES)
 
 clean:
-	rm -f $(SIMS) $(WAVES)
+	rm -f $(SIMS)
+	rm -rf $(DIRS)
 
-%.vcd: %.sim
+$(DIRS):
+	mkdir -p $@
+
+waves/%.vcd: %.sim | waves
 	vvp $<
 
 .SECONDEXPANSION: