28 lines
660 B
C
28 lines
660 B
C
#include "tommath_private.h"
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#ifdef MP_REDUCE_IS_2K_L_C
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/* LibTomMath, multiple-precision integer library -- Tom St Denis */
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/* SPDX-License-Identifier: Unlicense */
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/* determines if reduce_2k_l can be used */
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bool mp_reduce_is_2k_l(const mp_int *a)
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{
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if (mp_iszero(a)) {
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return false;
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} else if (a->used == 1) {
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return true;
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} else if (a->used > 1) {
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/* if more than half of the digits are -1 we're sold */
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int ix, iy;
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for (iy = ix = 0; ix < a->used; ix++) {
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if (a->dp[ix] == MP_DIGIT_MAX) {
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++iy;
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}
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}
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return (iy >= (a->used/2));
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} else {
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return false;
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}
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}
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#endif
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