29 lines
504 B
C
29 lines
504 B
C
/* TomsFastMath, a fast ISO C bignum library. -- Tom St Denis */
|
|
/* SPDX-License-Identifier: Unlicense */
|
|
#include <tfm_private.h>
|
|
|
|
void fp_rshd(fp_int *a, int x)
|
|
{
|
|
int y;
|
|
|
|
/* too many digits just zero and return */
|
|
if (x >= a->used) {
|
|
fp_zero(a);
|
|
return;
|
|
}
|
|
|
|
/* shift */
|
|
for (y = 0; y < a->used - x; y++) {
|
|
a->dp[y] = a->dp[y+x];
|
|
}
|
|
|
|
/* zero rest */
|
|
for (; y < a->used; y++) {
|
|
a->dp[y] = 0;
|
|
}
|
|
|
|
/* decrement count */
|
|
a->used -= x;
|
|
fp_clamp(a);
|
|
}
|