userspace: add SIMD test application

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/apps/test/simd_test/simd.c

@@ -0,0 +1,11 @@
+int main(int, char *argv[], char *[])
+{
+#if defined(__amd64__) || defined(__i386__)
+	__asm__ __volatile__("movaps (%0), %%xmm0\n"
+						 "movaps %%xmm0, (%0)\n"
+						 : : "r"(argv) : "memory");
+#else
+#warning "Unimplemented"
+#endif
+	return 0;
+}