Mercurial > dropbear
diff tomsfastmath/src/mul/fp_mul_comba_3.c @ 643:a362b62d38b2 dropbear-tfm
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 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tomsfastmath/src/mul/fp_mul_comba_3.c Wed Nov 23 18:10:20 2011 +0700 @@ -0,0 +1,39 @@ +#define TFM_DEFINES +#include "fp_mul_comba.c" + +#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