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annotate bncore.c @ 1:22d5cf7d4b1a libtommath

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author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:23:46 +0000
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1 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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2 *
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3 * LibTomMath is a library that provides multiple-precision
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4 * integer arithmetic as well as number theoretic functionality.
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5 *
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6 * The library was designed directly after the MPI library by
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7 * Michael Fromberger but has been written from scratch with
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8 * additional optimizations in place.
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9 *
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10 * The library is free for all purposes without any express
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11 * guarantee it works.
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12 *
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13 * Tom St Denis, [email protected], http://math.libtomcrypt.org
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14 */
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15 #include <tommath.h>
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16
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17 /* Known optimal configurations
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18
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19 CPU /Compiler /MUL CUTOFF/SQR CUTOFF
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20 -------------------------------------------------------------
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21 Intel P4 /GCC v3.2 / 70/ 108
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22 AMD Athlon XP /GCC v3.2 / 109/ 127
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23 Intel Celeron /GCC v3.2.1 / 97/ 127
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24 Mendocino 366mhz (evil)
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25 Intel P3 750mhz /GCC v3.2.1 / 95/ 110
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26 Coppermine (mussel)
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27 Intel Celeron /GCC v3.2.1 / 85/ 125
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28 Coppermine 700mhz
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29 Alpha /compaq / 54/ 87
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30 Compaq C V6.4-014 on Compaq Tru64 UNIX V5.1A (Rev. 1885)
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31 AlphaServer 1000A 5/300
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32 morwong
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33 Pentium classic 75 /GCC v3.2.1 / 73/ 127
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34 plod
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35
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36 */
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37
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38 /* configured for a AMD XP Thoroughbred core with etc/tune.c */
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39 int KARATSUBA_MUL_CUTOFF = 109, /* Min. number of digits before Karatsuba multiplication is used. */
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40 KARATSUBA_SQR_CUTOFF = 127, /* Min. number of digits before Karatsuba squaring is used. */
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41
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42 TOOM_MUL_CUTOFF = 350, /* no optimal values of these are known yet so set em high */
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43 TOOM_SQR_CUTOFF = 400;