diff bncore.c @ 1:22d5cf7d4b1a libtommath

Renaming branch
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:23:46 +0000
parents
children a96ff234ff19
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bncore.c	Mon May 31 18:23:46 2004 +0000
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+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, [email protected], http://math.libtomcrypt.org
+ */
+#include <tommath.h>
+
+/* Known optimal configurations
+
+ CPU                    /Compiler     /MUL CUTOFF/SQR CUTOFF
+-------------------------------------------------------------
+ Intel P4               /GCC v3.2     /        70/       108
+ AMD Athlon XP          /GCC v3.2     /       109/       127
+ Intel Celeron          /GCC v3.2.1   /        97/       127
+ Mendocino 366mhz (evil)
+ Intel P3 750mhz        /GCC v3.2.1   /        95/       110
+ Coppermine (mussel)
+ Intel Celeron          /GCC v3.2.1   /        85/       125
+ Coppermine 700mhz
+ Alpha                  /compaq       /        54/        87
+ Compaq C V6.4-014 on Compaq Tru64 UNIX V5.1A (Rev. 1885)
+ AlphaServer 1000A 5/300
+ morwong
+ Pentium classic 75     /GCC v3.2.1   /        73/       127
+ plod
+
+*/
+
+/* configured for a AMD XP Thoroughbred core with etc/tune.c */
+int     KARATSUBA_MUL_CUTOFF = 109,      /* Min. number of digits before Karatsuba multiplication is used. */
+        KARATSUBA_SQR_CUTOFF = 127,      /* Min. number of digits before Karatsuba squaring is used. */
+        
+        TOOM_MUL_CUTOFF      = 350,      /* no optimal values of these are known yet so set em high */
+        TOOM_SQR_CUTOFF      = 400;