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annotate tomsfastmath/src/mul/fp_mul_comba_8.c @ 645:8622ee48fab5 dropbear-tfm

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- Work around broken asm constraint behaviour on 32bit x86 OS X
author Matt Johnston <matt@ucc.asn.au>
date Wed, 30 Nov 2011 22:27:26 +0800
parents a362b62d38b2
children
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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_MUL8
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5 void fp_mul_comba8(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[16];
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8
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9 memcpy(at, A->dp, 8 * sizeof(fp_digit));
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10 memcpy(at+8, B->dp, 8 * 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[8]);
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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[9]); MULADD(at[1], at[8]);
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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[10]); MULADD(at[1], at[9]); MULADD(at[2], at[8]);
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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[0], at[11]); MULADD(at[1], at[10]); MULADD(at[2], at[9]); MULADD(at[3], at[8]);
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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[0], at[12]); MULADD(at[1], at[11]); MULADD(at[2], at[10]); MULADD(at[3], at[9]); MULADD(at[4], at[8]);
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32 COMBA_STORE(C->dp[4]);
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33 /* 5 */
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34 COMBA_FORWARD;
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35 MULADD(at[0], at[13]); MULADD(at[1], at[12]); MULADD(at[2], at[11]); MULADD(at[3], at[10]); MULADD(at[4], at[9]); MULADD(at[5], at[8]);
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36 COMBA_STORE(C->dp[5]);
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37 /* 6 */
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38 COMBA_FORWARD;
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39 MULADD(at[0], at[14]); MULADD(at[1], at[13]); MULADD(at[2], at[12]); MULADD(at[3], at[11]); MULADD(at[4], at[10]); MULADD(at[5], at[9]); MULADD(at[6], at[8]);
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40 COMBA_STORE(C->dp[6]);
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41 /* 7 */
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42 COMBA_FORWARD;
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43 MULADD(at[0], at[15]); MULADD(at[1], at[14]); MULADD(at[2], at[13]); MULADD(at[3], at[12]); MULADD(at[4], at[11]); MULADD(at[5], at[10]); MULADD(at[6], at[9]); MULADD(at[7], at[8]);
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44 COMBA_STORE(C->dp[7]);
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45 /* 8 */
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46 COMBA_FORWARD;
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47 MULADD(at[1], at[15]); MULADD(at[2], at[14]); MULADD(at[3], at[13]); MULADD(at[4], at[12]); MULADD(at[5], at[11]); MULADD(at[6], at[10]); MULADD(at[7], at[9]);
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48 COMBA_STORE(C->dp[8]);
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49 /* 9 */
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50 COMBA_FORWARD;
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51 MULADD(at[2], at[15]); MULADD(at[3], at[14]); MULADD(at[4], at[13]); MULADD(at[5], at[12]); MULADD(at[6], at[11]); MULADD(at[7], at[10]);
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52 COMBA_STORE(C->dp[9]);
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53 /* 10 */
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54 COMBA_FORWARD;
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55 MULADD(at[3], at[15]); MULADD(at[4], at[14]); MULADD(at[5], at[13]); MULADD(at[6], at[12]); MULADD(at[7], at[11]);
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56 COMBA_STORE(C->dp[10]);
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57 /* 11 */
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58 COMBA_FORWARD;
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59 MULADD(at[4], at[15]); MULADD(at[5], at[14]); MULADD(at[6], at[13]); MULADD(at[7], at[12]);
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60 COMBA_STORE(C->dp[11]);
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61 /* 12 */
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62 COMBA_FORWARD;
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63 MULADD(at[5], at[15]); MULADD(at[6], at[14]); MULADD(at[7], at[13]);
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64 COMBA_STORE(C->dp[12]);
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65 /* 13 */
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66 COMBA_FORWARD;
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67 MULADD(at[6], at[15]); MULADD(at[7], at[14]);
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68 COMBA_STORE(C->dp[13]);
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69 /* 14 */
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70 COMBA_FORWARD;
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71 MULADD(at[7], at[15]);
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72 COMBA_STORE(C->dp[14]);
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73 COMBA_STORE2(C->dp[15]);
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74 C->used = 16;
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75 C->sign = A->sign ^ B->sign;
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76 fp_clamp(C);
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77 COMBA_FINI;
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78 }
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79 #endif