Revert deleted test folder

test/.gitignore

@@ -0,0 +1 @@
+*.v

test/Makefile

@@ -0,0 +1,21 @@
+CC 		= riscv64-unknown-elf-gcc
+OBJDUMP = riscv64-unknown-elf-objdump
+ODFLAGS =
+OBJCOPY = riscv64-unknown-elf-objcopy
+OCFLAGS =
+ASFLAGS = -c
+CFLAGS  =
+LDFLAGS =
+
+TESTS = add_test
+
+.S.o:
+	$(CC) $(ASFLAGS) -o $@ $<
+
+
+# .c.o:
+# 	$(CC) $(CFLAGS) -o $@ -c $<
+# .v: .S.o
+
+$(TESTS): $(TESTS).o
+	$(OBJCOPY)  -O verilog -I elf64-little $< $@.v

test/add_test.S

@@ -0,0 +1,24 @@
+.text
+    nop
+    addi x1, x0, 1
+    addi x2, x0, 1
+    add  x3, x1, x2
+    add  x3, x1, x2
+    add  x4, x2, x3
+    add  x5, x3, x4
+    add  x6, x4, x5
+    add  x7, x5, x6
+    add  x8, x6, x7
+    csrw mstatus, x7
+    add  x9, x7, x8
+    csrr x1, mstatus
+    nop
+L0: jal x0, L1
+    nop
+    nop
+    nop
+    nop
+L1: jal x0, L0
+    nop
+    nop
+    addi x1, x0, 55