From 8cbb70365f653397c8c2b9370214d5aed36ec9fa Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Sat, 27 Nov 2021 15:50:40 +0100 Subject: tls: P256: remove redundant zeroing in sp_256_map_8 Previous change made it obvious that we zero out already-zeroed high bits function old new delta sp_256_ecc_mulmod_8 534 494 -40 Signed-off-by: Denys Vlasenko --- networking/tls_sp_c32.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'networking') diff --git a/networking/tls_sp_c32.c b/networking/tls_sp_c32.c index 74ded2cda..baed62f41 100644 --- a/networking/tls_sp_c32.c +++ b/networking/tls_sp_c32.c @@ -1062,7 +1062,6 @@ static void sp_256_map_8(sp_point* r, sp_point* p) /* x /= z^2 */ sp_256to512z_mont_mul_8(r->x, p->x, t2 /*, p256_mod, p256_mp_mod*/); - memset(r->x + 8, 0, sizeof(r->x) / 2); sp_512to256_mont_reduce_8(r->x /*, p256_mod, p256_mp_mod*/); /* Reduce x to less than modulus */ if (sp_256_cmp_8(r->x, p256_mod) >= 0) @@ -1071,7 +1070,6 @@ static void sp_256_map_8(sp_point* r, sp_point* p) /* y /= z^3 */ sp_256to512z_mont_mul_8(r->y, p->y, t1 /*, p256_mod, p256_mp_mod*/); - memset(r->y + 8, 0, sizeof(r->y) / 2); sp_512to256_mont_reduce_8(r->y /*, p256_mod, p256_mp_mod*/); /* Reduce y to less than modulus */ if (sp_256_cmp_8(r->y, p256_mod) >= 0) -- cgit v1.2.1