Mercurial > dropbear
annotate libtommath/bn_mp_dr_setup.c @ 1437:871b18fd7065 fuzz
merge from main (libtommath/libtomcrypt/curve25510-donna updates)
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sat, 24 Jun 2017 22:51:45 +0800 |
| parents | 60fc6476e044 |
| children | 8bba51a55704 |
| rev | line source |
|---|---|
| 1436 | 1 #include <tommath_private.h> |
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2 #ifdef BN_MP_DR_SETUP_C |
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis |
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4 * |
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5 * LibTomMath is a library that provides multiple-precision |
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6 * integer arithmetic as well as number theoretic functionality. |
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7 * |
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8 * The library was designed directly after the MPI library by |
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9 * Michael Fromberger but has been written from scratch with |
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10 * additional optimizations in place. |
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11 * |
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12 * The library is free for all purposes without any express |
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13 * guarantee it works. |
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14 * |
| 1436 | 15 * Tom St Denis, [email protected], http://libtom.org |
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16 */ |
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17 |
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18 /* determines the setup value */ |
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19 void mp_dr_setup(mp_int *a, mp_digit *d) |
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20 { |
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21 /* the casts are required if DIGIT_BIT is one less than |
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22 * the number of bits in a mp_digit [e.g. DIGIT_BIT==31] |
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23 */ |
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24 *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) - |
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25 ((mp_word)a->dp[0])); |
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26 } |
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27 |
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28 #endif |
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| 1436 | 30 /* $Source$ */ |
| 31 /* $Revision$ */ | |
| 32 /* $Date$ */ |