diff options
Diffstat (limited to 'src/log10.c')
| -rw-r--r-- | src/log10.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/log10.c b/src/log10.c index 6b7e687..f2062d3 100644 --- a/src/log10.c +++ b/src/log10.c @@ -82,7 +82,9 @@ mpc_log10_aux (mpc_ptr rop, mpc_srcptr op, mpc_rnd_t rnd, int flag, int nb) mpfr_div (mpc_realref (tmp), mpc_realref (tmp), log10, MPFR_RNDN); ok = mpfr_can_round (mpc_realref (tmp), prec - 2, MPFR_RNDN, MPFR_RNDZ, MPC_PREC_RE(rop) + - (MPC_RND_RE (rnd) == MPFR_RNDN)); + (MPC_RND_RE (rnd) == MPFR_RNDN)) || + mpfr_cmp_ui (mpc_imagref (op), 1) == 0; + /* the result is also exact when y=1 */ if (ok) ret = mpfr_set (mpc_realref (rop), mpc_realref (tmp), MPC_RND_RE (rnd)); |