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- #ifdef TFM_MUL3
- void fp_mul_comba3(fp_int *A, fp_int *B, fp_int *C)
- {
- fp_digit c0, c1, c2, at[6];
- memcpy(at, A->dp, 3 * sizeof(fp_digit));
- memcpy(at+3, B->dp, 3 * sizeof(fp_digit));
- COMBA_START;
- COMBA_CLEAR;
- /* 0 */
- MULADD(at[0], at[3]);
- COMBA_STORE(C->dp[0]);
- /* 1 */
- COMBA_FORWARD;
- MULADD(at[0], at[4]); MULADD(at[1], at[3]);
- COMBA_STORE(C->dp[1]);
- /* 2 */
- COMBA_FORWARD;
- MULADD(at[0], at[5]); MULADD(at[1], at[4]); MULADD(at[2], at[3]);
- COMBA_STORE(C->dp[2]);
- /* 3 */
- COMBA_FORWARD;
- MULADD(at[1], at[5]); MULADD(at[2], at[4]);
- COMBA_STORE(C->dp[3]);
- /* 4 */
- COMBA_FORWARD;
- MULADD(at[2], at[5]);
- COMBA_STORE(C->dp[4]);
- COMBA_STORE2(C->dp[5]);
- C->used = 6;
- C->sign = A->sign ^ B->sign;
- fp_clamp(C);
- COMBA_FINI;
- }
- #endif
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