CC = gcc
CFLAGS = -std=c89 -pedantic -Wall -Werror -O2

IV = iverilog

IVFLAGS = -Iinclude/ -DSIMULATION
# The macroassembly header file is somewhat different thing, but I don't know
# what place would be more suitable for it than include/ dir
MACROASM_FLAGS := -Iinclude/ -E

# It made sense to just list all of those in this variable
# and then prepend stack_machine_ to each element
STACK_MACHINE_TESTS := \
	store \
	load_store \
	multiinstructions_load_store \
	add \
	sub \
	div \
	mul

# Add other tests here if You need
TESTS := \
	self \
	intercon \
	div \
	vga \
	$(addprefix stack_machine_,$(STACK_MACHINE_TESTS))

# For each of these Makefile will attempt to generate VGAdump.ppm
# and compare it to VGAdump_expected.ppm inside that test's directory
TESTS_WITH_VGA := vga

# Short C programs
TOOLS := VGAdump2ppm

ifdef DEBUG
IVFLAGS += -DDEBUG
DBG&SAVE = tee "$(1)"
else
DBG&SAVE = cat > "$(1)" # putting cat through pipe - what an animal cruelty!
endif

TEST_TARGETS := $(addprefix test_,$(TESTS))
VGA_TEST_TARGETS := $(addprefix test_,$(TESTS_WITH_VGA))

TEST_LOGS := $(foreach TEST,$(TESTS),tests/$(TEST)/report.log)

TOOLS_TARGETS := $(addprefix tools/,$(TOOLS))

GENERATED_MEM_FILES := $(shell find tests/ -name "*.s.tcl")
GENERATED_MEM_FILES := $(basename $(basename $(GENERATED_MEM_FILES)))
GENERATED_MEM_FILES += $(basename $(shell find tests/ -name "*.memv"))
GENERATED_MEM_FILES := $(addsuffix .mem,$(GENERATED_MEM_FILES))

# TODO: check if this function can be changed to use $(shell grep ...)
FILE_LINES = `grep -E '^[[:space:]]*[^[:space:]/]' -c $(1)`

test : $(TEST_TARGETS)

tests/%.mem : tests/%.memv
	$(IV) $(MACROASM_FLAGS) $^ -o $@

tests/%.mem : tests/%.s.tcl tclasm.tcl
	$< > $@

tests/self/test.vvp : tests/self/operations.mem tests/self/test.v \
		models/slave.v models/master.v include/messages.vh
	$(IV) $(IVFLAGS) -s self_test \
		-DMASTER_OPERATIONS_COUNT=$(call FILE_LINES,$<) \
		$(filter %.v,$^) -o $@

tests/intercon/test.vvp : tests/intercon/operations.mem tests/intercon/test.v \
		models/slave.v models/master.v design/intercon.v \
		include/messages.vh
	$(IV) $(IVFLAGS) -s intercon_test \
		-DMASTER_OPERATIONS_COUNT=$(call FILE_LINES,$<) \
		$(filter %.v,$^) -o $@

tests/div/test.vvp : tests/div/test.v design/div.v include/messages.vh
	$(IV) $(IVFLAGS) -s div_test $(filter %.v,$^) -o $@

tests/vga/test.vvp : tests/vga/test.v design/vga.v models/vga_display.v \
		include/messages.vh
	$(IV) $(IVFLAGS) -s vga_test $^ -o $@

tests/stack_machine_%/test.vvp : tests/stack_machine_%/instructions.mem \
		tests/stack_machine_%/words_to_verify.mem \
		tests/stack_machine_%/test.v models/slave.v \
		design/stack_machine.v design/div.v include/messages.vh
	$(IV) $(IVFLAGS) -s stack_machine_test \
		-DINSTRUCTIONS_COUNT=$(call FILE_LINES,$<) \
		-DWORDS_TO_VERIFY_COUNT=$(call FILE_LINES,$(filter %fy.mem,$^)) \
		$(filter %.v,$^) -o $@


$(foreach TEST,$(TESTS_WITH_VGA),tests/$(TEST)/report.log) \
$(foreach TEST,$(TESTS_WITH_VGA),tests/$(TEST)/VGAdump.ppm) : design/font.mem

tests/%/VGAdump.mem tests/%/report.log : tests/%/test.vvp
	cd $(dir $<) && vvp $(notdir $<) | $(call DBG&SAVE,report.log)

tests/%/VGAdump.ppm : tests/%/VGAdump.mem tools/VGAdump2ppm
	grep -v // < $< | ./tools/VGAdump2ppm > $@

$(VGA_TEST_TARGETS) : test_% : tests/%/VGAdump_expected.ppm tests/%/VGAdump.ppm
$(TEST_TARGETS) : test_% : tests/%/report.log
	if grep error $<; then false; fi
	if [ "$(filter $@,$(VGA_TEST_TARGETS))" != "" ]; then \
		diff $(dir $<)VGAdump.ppm $(dir $<)VGAdump_expected.ppm; \
	fi

tools : $(TOOLS_TARGETS)

$(TOOLS_TARGETS) : tools/% : tools/%.c
	$(CC) $(CFLAGS) $^ -o $@

clean :
	-find tests/ -name "*.vvp" -delete
	-find tests/ -name "*.log" -delete
	-find tests/ -name "VGAdump.mem" -delete
	-find tests/ -name "VGAdump.ppm" -delete
	-rm $(GENERATED_MEM_FILES)
	-rm tests
	-rm $(TOOLS_TARGETS)

.PHONY : tools test $(TEST_TARGETS)