diff options
Diffstat (limited to 'bignum.c')
-rw-r--r-- | bignum.c | 7 |
1 files changed, 4 insertions, 3 deletions
@@ -1511,15 +1511,16 @@ bigdivrem_mulsub(BDIGIT *zds, size_t zn, BDIGIT x, const BDIGIT *yds, size_t yn) i = 0; do { - BDIGIT_DBL ee; + BDIGIT_DBL_SIGNED ee; t2 += (BDIGIT_DBL)yds[i] * x; ee = num - BIGLO(t2); - num = (BDIGIT_DBL)zds[i] + ee; + num = (BDIGIT_DBL_SIGNED)zds[i] + ee; if (ee) zds[i] = BIGLO(num); num = BIGDN(num); t2 = BIGDN(t2); } while (++i < yn); - num += zds[i] - t2; /* borrow from high digit; don't update */ + num -= (BDIGIT_DBL_SIGNED)t2; + num += (BDIGIT_DBL_SIGNED)zds[yn]; /* borrow from high digit; don't update */ return num; } |