+#ifdef X
+#undef X
+#endif
+#ifndef MD32_XARRAY
+ /*
+ * Originally X was an array. As it's automatic it's natural
+ * to expect RISC compiler to accomodate at least part of it in
+ * the register bank, isn't it? Unfortunately not all compilers
+ * "find" this expectation reasonable:-( On order to make such
+ * compilers generate better code I replace X[] with a bunch of
+ * X0, X1, etc. See the function body below...
+ * <appro@fy.chalmers.se>
+ */
+# define X(i) XX##i
+#else
+ /*
+ * However! Some compilers (most notably HP C) get overwhelmed by
+ * that many local variables so that we have to have the way to
+ * fall down to the original behavior.
+ */
+# define X(i) XX[i]
+#endif
+