From b4bd23b4d2a4c640880b49069e02cd598dd03416 Mon Sep 17 00:00:00 2001 From: Steffen Jaeckel Date: Tue, 26 May 2020 17:36:47 +0200 Subject: Update LibTomMath to 1.2.0 (#84) * update C files * update other files * update headers * update makefiles * remove mp_set/get_double() * use ltm 1.2.0 API * update ltm_desc * use bundled tommath if system-tommath is too old * XMALLOC etc. were changed to MP_MALLOC etc. --- libtommath/bn_mp_dr_reduce.c | 28 +++++++--------------------- 1 file changed, 7 insertions(+), 21 deletions(-) (limited to 'libtommath/bn_mp_dr_reduce.c') diff --git a/libtommath/bn_mp_dr_reduce.c b/libtommath/bn_mp_dr_reduce.c index 77de433..ffc33a6 100644 --- a/libtommath/bn_mp_dr_reduce.c +++ b/libtommath/bn_mp_dr_reduce.c @@ -1,16 +1,7 @@ #include "tommath_private.h" #ifdef BN_MP_DR_REDUCE_C -/* LibTomMath, multiple-precision integer library -- Tom St Denis - * - * LibTomMath is a library that provides multiple-precision - * integer arithmetic as well as number theoretic functionality. - * - * The library was designed directly after the MPI library by - * Michael Fromberger but has been written from scratch with - * additional optimizations in place. - * - * SPDX-License-Identifier: Unlicense - */ +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ /* reduce "x" in place modulo "n" using the Diminished Radix algorithm. * @@ -26,9 +17,10 @@ * * Input x must be in the range 0 <= x <= (n-1)**2 */ -int mp_dr_reduce(mp_int *x, const mp_int *n, mp_digit k) +mp_err mp_dr_reduce(mp_int *x, const mp_int *n, mp_digit k) { - int err, i, m; + mp_err err; + int i, m; mp_word r; mp_digit mu, *tmpx1, *tmpx2; @@ -60,16 +52,14 @@ top: for (i = 0; i < m; i++) { r = ((mp_word)*tmpx2++ * (mp_word)k) + *tmpx1 + mu; *tmpx1++ = (mp_digit)(r & MP_MASK); - mu = (mp_digit)(r >> ((mp_word)DIGIT_BIT)); + mu = (mp_digit)(r >> ((mp_word)MP_DIGIT_BIT)); } /* set final carry */ *tmpx1++ = mu; /* zero words above m */ - for (i = m + 1; i < x->used; i++) { - *tmpx1++ = 0; - } + MP_ZERO_DIGITS(tmpx1, (x->used - m) - 1); /* clamp, sub and return */ mp_clamp(x); @@ -86,7 +76,3 @@ top: return MP_OKAY; } #endif - -/* ref: HEAD -> master, tag: v1.1.0 */ -/* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */ -/* commit time: 2019-01-28 20:32:32 +0100 */ -- cgit v1.2.3