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annotate tomsfastmath/src/mul/fp_mul_comba_3.c @ 643:a362b62d38b2 dropbear-tfm

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Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a with Makefile.in renamed
author Matt Johnston <matt@ucc.asn.au>
date Wed, 23 Nov 2011 18:10:20 +0700
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a362b62d38b2 Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a
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1 #define TFM_DEFINES
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2 #include "fp_mul_comba.c"
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3
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4 #ifdef TFM_MUL3
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5 void fp_mul_comba3(fp_int *A, fp_int *B, fp_int *C)
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6 {
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7 fp_digit c0, c1, c2, at[6];
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8
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9 memcpy(at, A->dp, 3 * sizeof(fp_digit));
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10 memcpy(at+3, B->dp, 3 * sizeof(fp_digit));
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11 COMBA_START;
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12
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13 COMBA_CLEAR;
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14 /* 0 */
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15 MULADD(at[0], at[3]);
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16 COMBA_STORE(C->dp[0]);
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17 /* 1 */
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18 COMBA_FORWARD;
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19 MULADD(at[0], at[4]); MULADD(at[1], at[3]);
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20 COMBA_STORE(C->dp[1]);
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21 /* 2 */
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22 COMBA_FORWARD;
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23 MULADD(at[0], at[5]); MULADD(at[1], at[4]); MULADD(at[2], at[3]);
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24 COMBA_STORE(C->dp[2]);
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25 /* 3 */
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26 COMBA_FORWARD;
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27 MULADD(at[1], at[5]); MULADD(at[2], at[4]);
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28 COMBA_STORE(C->dp[3]);
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29 /* 4 */
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30 COMBA_FORWARD;
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31 MULADD(at[2], at[5]);
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32 COMBA_STORE(C->dp[4]);
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33 COMBA_STORE2(C->dp[5]);
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34 C->used = 6;
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35 C->sign = A->sign ^ B->sign;
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36 fp_clamp(C);
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37 COMBA_FINI;
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38 }
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39 #endif