diff bncore.c @ 2:86e0b50a9b58 libtommath-orig ltm-0.30-orig

ltm 0.30 orig import
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:25:22 +0000
parents
children d29b64170cf0
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bncore.c	Mon May 31 18:25:22 2004 +0000
@@ -0,0 +1,31 @@
+/* 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
+
+*/
+
+/* 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;