diff options
Diffstat (limited to 'src/zsub.c')
| -rw-r--r-- | src/zsub.c | 18 |
1 files changed, 6 insertions, 12 deletions
@@ -1,9 +1,6 @@ /* See LICENSE file for copyright and license details. */ #include "internals" -#include <stdlib.h> -#include <string.h> - void zsub_unsigned(z_t a, z_t b, z_t c) @@ -18,16 +15,14 @@ zsub_unsigned(z_t a, z_t b, z_t c) SET_SIGNUM(a, 0); return; } - if (a != c) - zset(a, c); - *subtrahend = *b; + SET(a, c); + *s = *b; } else { - if (a != b) - zset(a, b); - *subtrahend = *c; + SET(a, b); + *s = *c; } - n = a->used < s->used ? a->used : s->used; + n = MIN(a->used, s->used); for (i = 0; i < n; i++) { carry[~i & 1] = carry[i & 1] ? (a->chars[i] <= s->chars[i]) : (a->chars[i] < s->chars[i]); @@ -51,8 +46,7 @@ zsub(z_t a, z_t b, z_t c) } else if (zzero(b)) { zneg(a, c); } else if (zzero(c)) { - if (a != b) - zset(a, b); + SET(a, b); } else if ((zsignum(b) | zsignum(c)) < 0) { if (zsignum(b) < 0) { if (zsignum(c) < 0) { |