Added rvvector folder

rvvector/basic/vx_vec.s

@@ -0,0 +1,24 @@
+
+
+
+.type vx_vec_test, @function
+.global vx_vec_test
+vx_vec_test:
+	slli a0, a0, 2
+	add a0, a0, a3
+	vmv.v.x vv0, a2
+	# vsplat4 vv0, a2
+stripmine_loop:
+	vlb4 vv1, (a1)
+	vcmpez4 vp0, vv1
+	!vp0 vlw4 vv1, (a3)
+	!vp0 vlw4 vv2, (a4)
+	!vp0 vfma4 vv1, vv0, vv1, vv2
+	!vp0 vsw4 vv1, (a4)
+	addi a1, a1, 4
+	addi a3, a3, 16
+	addi a4, a4, 16
+	bleu a3, a0, stripmine_loop
+	# handle edge cases
+	# when (n % 4) != 0 ...
+	ret