+ * Revision 1.10 2001/04/03 19:36:05 mdw
+ * Add some simple bitwise operations so that Perl can use them.
+ *
+ * Revision 1.9 2000/10/08 15:48:35 mdw
+ * Rename Karatsuba constants now that we have @gfx_kmul@ too.
+ *
+ * Revision 1.8 2000/10/08 12:02:21 mdw
+ * Use @MP_EQ@ instead of @MP_CMP@.
+ *
+ * Revision 1.7 2000/06/22 19:02:53 mdw
+ * New function @mp_odd@ to extract powers of two from an integer. This is
+ * common code from the Rabin-Miller test, RSA key recovery and modular
+ * square-root extraction.
+ *
+ * Revision 1.6 2000/06/17 11:45:09 mdw
+ * Major memory management overhaul. Added arena support. Use the secure
+ * arena for secret integers. Replace and improve the MP management macros
+ * (e.g., replace MP_MODIFY by MP_DEST).
+ *
+ * Revision 1.5 1999/12/22 15:54:41 mdw
+ * Adjust Karatsuba parameters. Calculate destination size better.
+ *
+ * Revision 1.4 1999/12/13 15:35:16 mdw
+ * Slightly different rules on memory allocation.
+ *
+ * Revision 1.3 1999/12/11 10:57:43 mdw
+ * Karatsuba squaring algorithm.
+ *