diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/fmma.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/fmma.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/fmma.c b/Build/source/libs/mpfr/mpfr-src/src/fmma.c index 27d31c1299b..492e545e58f 100644 --- a/Build/source/libs/mpfr/mpfr-src/src/fmma.c +++ b/Build/source/libs/mpfr/mpfr-src/src/fmma.c @@ -1,6 +1,6 @@ /* mpfr_fmma, mpfr_fmms -- Compute a*b +/- c*d -Copyright 2014-2019 Free Software Foundation, Inc. +Copyright 2014-2020 Free Software Foundation, Inc. Contributed by the AriC and Caramba projects, INRIA. This file is part of the GNU MPFR Library. @@ -22,6 +22,7 @@ https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., #include "mpfr-impl.h" +/* compute a*b+c*d if neg=0 (fmma), a*b-c*d otherwise (fmms) */ static int mpfr_fmma_aux (mpfr_ptr z, mpfr_srcptr a, mpfr_srcptr b, mpfr_srcptr c, mpfr_srcptr d, mpfr_rnd_t rnd, int neg) @@ -52,19 +53,19 @@ mpfr_fmma_aux (mpfr_ptr z, mpfr_srcptr a, mpfr_srcptr b, mpfr_srcptr c, mpfr_ubf_mul_exact (u, a, b); mpfr_ubf_mul_exact (v, c, d); - if (neg) - MPFR_CHANGE_SIGN (v); if (prec_z == MPFR_PREC(a) && prec_z == MPFR_PREC(b) && prec_z == MPFR_PREC(c) && prec_z == MPFR_PREC(d) && un == MPFR_PREC2LIMBS(2 * prec_z)) { MPFR_TMP_INIT (zp, zz, 2 * prec_z, un); MPFR_PREC(u) = MPFR_PREC(v) = 2 * prec_z; - inex = mpfr_add (zz, (mpfr_srcptr) u, (mpfr_srcptr) v, rnd); + inex = (neg == 0) ? mpfr_add (zz, (mpfr_srcptr) u, (mpfr_srcptr) v, rnd) + : mpfr_sub (zz, (mpfr_srcptr) u, (mpfr_srcptr) v, rnd); inex = mpfr_set_1_2 (z, zz, rnd, inex); } else - inex = mpfr_add (z, (mpfr_srcptr) u, (mpfr_srcptr) v, rnd); + inex = (neg == 0) ? mpfr_add (z, (mpfr_srcptr) u, (mpfr_srcptr) v, rnd) + : mpfr_sub (z, (mpfr_srcptr) u, (mpfr_srcptr) v, rnd); MPFR_UBF_CLEAR_EXP (u); MPFR_UBF_CLEAR_EXP (v); |