diff options
Diffstat (limited to 'src/dot.c')
| -rw-r--r-- | src/dot.c | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -30,6 +30,7 @@ mpc_dot (mpc_ptr res, const mpc_ptr *x, const mpc_ptr *y, mpfr_ptr *t; mpfr_t *z; unsigned long i; + mpfr_t re_res; z = (mpfr_t *) malloc (2 * n * sizeof (mpfr_t)); MPC_ASSERT(z != NULL); @@ -57,7 +58,10 @@ mpc_dot (mpc_ptr res, const mpc_ptr *x, const mpc_ptr *y, mpfr_mul (z[n+i], mpc_imagref (x[i]), mpc_imagref (y[i]), MPFR_RNDZ); mpfr_neg (z[n+i], z[n+i], MPFR_RNDZ); } - inex_re = mpfr_sum (mpc_realref (res), t, 2 * n, MPC_RND_RE (rnd)); + /* copy the real part in a temporary variable, since it might be in the + input array */ + mpfr_init2 (re_res, mpfr_get_prec (mpc_realref (res))); + inex_re = mpfr_sum (re_res, t, 2 * n, MPC_RND_RE (rnd)); /* we then store in z[i] the value of Re(x[i])*Im(y[i]) and in z[n+i] that of Im(x[i])*Re(y[i]) */ for (i = 0; i < n; i++) @@ -72,6 +76,8 @@ mpc_dot (mpc_ptr res, const mpc_ptr *x, const mpc_ptr *y, mpfr_mul (z[n+i], mpc_imagref (x[i]), mpc_realref (y[i]), MPFR_RNDZ); } inex_im = mpfr_sum (mpc_imagref (res), t, 2 * n, MPC_RND_IM (rnd)); + mpfr_swap (mpc_realref (res), re_res); + mpfr_clear (re_res); for (i = 0; i < 2 * n; i++) mpfr_clear (z[i]); free (t); |