add rv64 backend

It is mostly complete, but still has a few ABI bugs when passing
floats in structs, or when structs are passed partly in register,
and partly on stack.

1 files changed, 12 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 1a0074f..711873b 100644
--- a/Makefile
+++ b/Makefile
@@ -7,11 +7,13 @@ SRC      = main.c util.c parse.c cfg.c mem.c ssa.c alias.c load.c copy.c \
            fold.c live.c spill.c rega.c gas.c
 AMD64SRC = amd64/targ.c amd64/sysv.c amd64/isel.c amd64/emit.c
 ARM64SRC = arm64/targ.c arm64/abi.c arm64/isel.c arm64/emit.c
-SRCALL   = $(SRC) $(AMD64SRC) $(ARM64SRC)
+RV64SRC  = rv64/targ.c rv64/abi.c rv64/isel.c rv64/emit.c
+SRCALL   = $(SRC) $(AMD64SRC) $(ARM64SRC) $(RV64SRC)
 
 AMD64OBJ = $(AMD64SRC:%.c=$(OBJDIR)/%.o)
 ARM64OBJ = $(ARM64SRC:%.c=$(OBJDIR)/%.o)
-OBJ      = $(SRC:%.c=$(OBJDIR)/%.o) $(AMD64OBJ) $(ARM64OBJ)
+RV64OBJ  = $(RV64SRC:%.c=$(OBJDIR)/%.o)
+OBJ      = $(SRC:%.c=$(OBJDIR)/%.o) $(AMD64OBJ) $(ARM64OBJ) $(RV64OBJ)
 
 CFLAGS += -Wall -Wextra -std=c99 -g -pedantic
 
@@ -27,11 +29,13 @@ $(OBJDIR)/timestamp:
 	@mkdir -p $(OBJDIR)
 	@mkdir -p $(OBJDIR)/amd64
 	@mkdir -p $(OBJDIR)/arm64
+	@mkdir -p $(OBJDIR)/rv64
 	@touch $@
 
 $(OBJ): all.h ops.h
 $(AMD64OBJ): amd64/all.h
 $(ARM64OBJ): arm64/all.h
+$(RV64OBJ): rv64/all.h
 $(OBJDIR)/main.o: config.h
 
 config.h:
@@ -46,6 +50,9 @@ config.h:
 		*aarch64*)                             \
 			echo "#define Deftgt T_arm64"; \
 			;;                             \
+		*riscv64*)                             \
+			echo "#define Deftgt T_rv64";  \
+			;;                             \
 		*)                                     \
 			echo "#define Deftgt T_amd64_sysv";\
 			;;                             \
@@ -72,6 +79,9 @@ check: $(OBJDIR)/$(BIN)
 check-arm64: $(OBJDIR)/$(BIN)
 	TARGET=arm64 tools/test.sh all
 
+check-rv64: $(OBJDIR)/$(BIN)
+	TARGET=rv64 tools/test.sh all
+
 src:
 	@echo $(SRCALL)