diff options
Diffstat (limited to 'src/mpfr-mini-gmp.c')
| -rw-r--r-- | src/mpfr-mini-gmp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mpfr-mini-gmp.c b/src/mpfr-mini-gmp.c index 57e8614ba..e8ae8fe58 100644 --- a/src/mpfr-mini-gmp.c +++ b/src/mpfr-mini-gmp.c @@ -59,7 +59,9 @@ mpn_neg (mp_limb_t *rp, const mp_limb_t *sp, mp_size_t n) for (i = 0; i < n; i++) rp[i] = ~sp[i]; - return mpn_add_1 (rp, rp, n, (mp_limb_t) 1); + /* the return value of mpn_neg is the borrow as if we subtracted + {sp, n} from {0, n}, i.e., it is always 1 unless {sp, n} is zero */ + return 1 - mpn_add_1 (rp, rp, n, (mp_limb_t) 1); } #endif |