Adds reference impl for cSIDH

csidh/Makefile

@@ -0,0 +1,33 @@
+objify = $(patsubst %.c,$(BUILD_DIR)/%.$2,$(patsubst %.s,$(BUILD_DIR)/%.$2,$1))
+
+CFLAGS=-Wall -Wextra -Wpedantic -O3 -funroll-loops
+LDFLAGS=
+BUILD_DIR=build
+AR=ar rcs
+RANLIB=ranlib
+
+CODE_SRC_C = \
+	ref/csidh/rng.c \
+	ref/csidh/mont.c \
+	ref/csidh/csidh.c
+CODE_SRC_S = \
+	ref/csidh/u512.s \
+	ref/csidh/fp.s
+CODE_OBJ = \
+ 	$(call objify,$(CODE_SRC_C),o) \
+ 	$(call objify,$(CODE_SRC_S),o)
+
+$(BUILD_DIR)/%.o: %.c
+	case $@ in */*) f=$@; mkdir -p $${f%/*} ;; esac
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+$(BUILD_DIR)/%.o: %.s
+	case $@ in */*) f=$@; mkdir -p $${f%/*} ;; esac
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+all: $(CODE_OBJ)
+	$(AR) $(BUILD_DIR)/libcsidh.a $^
+	$(RANLIB) $(BUILD_DIR)/libcsidh.a
+
+clean:
+	rm -rf build