--- /dev/null
+/* -*-c-*-
+ *
+ * $Id: karatsuba.h,v 1.1 2000/06/17 11:42:11 mdw Exp $
+ *
+ * Macros for Karatsuba functions
+ *
+ * (c) 2000 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------*
+ *
+ * $Log: karatsuba.h,v $
+ * Revision 1.1 2000/06/17 11:42:11 mdw
+ * Moved the Karatsuba macros into a separate file for better sharing.
+ * Fixed some comments.
+ *
+ */
+
+#ifndef CATACOMB_MPX_KMAC_H
+#define CATACOMB_MPX_KMAC_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/*----- Header files ------------------------------------------------------*/
+
+#ifndef CATACOMB_MPW_H
+# include "mpw.h"
+#endif
+
+/*----- Macros provided ---------------------------------------------------*/
+
+#define UADD(dv, av, avl) do { \
+ mpw *_dv = (dv); \
+ const mpw *_av = (av), *_avl = (avl); \
+ mpw _c = 0; \
+ \
+ while (_av < _avl) { \
+ mpw _a, _b; \
+ mpd _x; \
+ _a = *_av++; \
+ _b = *_dv; \
+ _x = (mpd)_a + (mpd)_b + _c; \
+ *_dv++ = MPW(_x); \
+ _c = _x >> MPW_BITS; \
+ } \
+ while (_c) { \
+ mpd _x = (mpd)*_dv + (mpd)_c; \
+ *_dv++ = MPW(_x); \
+ _c = _x >> MPW_BITS; \
+ } \
+} while (0)
+
+#define UADD2(dv, dvl, av, avl, bv, bvl) do { \
+ mpw *_dv = (dv), *_dvl = (dvl); \
+ const mpw *_av = (av), *_avl = (avl); \
+ const mpw *_bv = (bv), *_bvl = (bvl); \
+ mpw _c = 0; \
+ \
+ while (_av < _avl || _bv < _bvl) { \
+ mpw _a, _b; \
+ mpd _x; \
+ _a = (_av < _avl) ? *_av++ : 0; \
+ _b = (_bv < _bvl) ? *_bv++ : 0; \
+ _x = (mpd)_a + (mpd)_b + _c; \
+ *_dv++ = MPW(_x); \
+ _c = _x >> MPW_BITS; \
+ } \
+ *_dv++ = _c; \
+ while (_dv < _dvl) \
+ *_dv++ = 0; \
+} while (0)
+
+#define USUB(dv, av, avl) do { \
+ mpw *_dv = (dv); \
+ const mpw *_av = (av), *_avl = (avl); \
+ mpw _c = 0; \
+ \
+ while (_av < _avl) { \
+ mpw _a, _b; \
+ mpd _x; \
+ _a = *_av++; \
+ _b = *_dv; \
+ _x = (mpd)_b - (mpd)_a - _c; \
+ *_dv++ = MPW(_x); \
+ if (_x >> MPW_BITS) \
+ _c = 1; \
+ else \
+ _c = 0; \
+ } \
+ while (_c) { \
+ mpd _x = (mpd)*_dv - (mpd)_c; \
+ *_dv++ = MPW(_x); \
+ if (_x >> MPW_BITS) \
+ _c = 1; \
+ else \
+ _c = 0; \
+ } \
+} while (0)
+
+/*----- That's all, folks -------------------------------------------------*/
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
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