Mercurial > dropbear
diff bncore.c @ 1:22d5cf7d4b1a libtommath
Renaming branch
author | Matt Johnston <matt@ucc.asn.au> |
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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 @@ -0,0 +1,43 @@ +/* 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;