diff options
Diffstat (limited to 'ecc-j-to-a.c')
| -rw-r--r-- | ecc-j-to-a.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/ecc-j-to-a.c b/ecc-j-to-a.c index df8b8764..26c1a03a 100644 --- a/ecc-j-to-a.c +++ b/ecc-j-to-a.c @@ -46,6 +46,7 @@ ecc_j_to_a (const struct ecc_curve *ecc, #define up (scratch + ecc->size) #define iz2p (scratch + ecc->size) #define iz3p (scratch + 2*ecc->size) +#define izBp (scratch + 3*ecc->size) #define tp scratch mp_limb_t cy; @@ -72,11 +73,11 @@ ecc_j_to_a (const struct ecc_curve *ecc, if (flags & 1) { /* Divide this common factor by B */ - mpn_copyi (iz3p, izp, ecc->size); - mpn_zero (iz3p + ecc->size, ecc->size); - ecc->redc (ecc, iz3p); - - ecc_modp_mul (ecc, iz2p, izp, iz3p); + mpn_copyi (izBp, izp, ecc->size); + mpn_zero (izBp + ecc->size, ecc->size); + ecc->redc (ecc, izBp); + + ecc_modp_mul (ecc, iz2p, izp, izBp); } else ecc_modp_sqr (ecc, iz2p, izp); |