diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/ui_div.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/ui_div.c | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/ui_div.c b/Build/source/libs/mpfr/mpfr-src/src/ui_div.c index 23b5cdf0d7b..03629555e19 100644 --- a/Build/source/libs/mpfr/mpfr-src/src/ui_div.c +++ b/Build/source/libs/mpfr/mpfr-src/src/ui_div.c @@ -1,6 +1,6 @@ /* mpfr_ui_div -- divide a machine integer by a floating-point number -Copyright 2000-2019 Free Software Foundation, Inc. +Copyright 2000-2020 Free Software Foundation, Inc. Contributed by the AriC and Caramba projects, INRIA. This file is part of the GNU MPFR Library. @@ -66,23 +66,38 @@ mpfr_ui_div (mpfr_ptr y, unsigned long int u, mpfr_srcptr x, mpfr_rnd_t rnd_mode } else if (MPFR_LIKELY(u != 0)) { - mpfr_t uu; - mp_limb_t up[1]; - int cnt; int inex; - MPFR_SAVE_EXPO_DECL (expo); - MPFR_TMP_INIT1(up, uu, GMP_NUMB_BITS); - MPFR_ASSERTN(u == (mp_limb_t) u); - count_leading_zeros(cnt, (mp_limb_t) u); - up[0] = (mp_limb_t) u << cnt; - /* Optimization note: Exponent save/restore operations may be removed if mpfr_div works even when uu is out-of-range. */ MPFR_SAVE_EXPO_MARK (expo); - MPFR_SET_EXP (uu, GMP_NUMB_BITS - cnt); + +#ifdef MPFR_LONG_WITHIN_LIMB + { + mpfr_t uu; + mp_limb_t up[1]; + int cnt; + + MPFR_TMP_INIT1(up, uu, GMP_NUMB_BITS); + MPFR_ASSERTN(u == (mp_limb_t) u); + count_leading_zeros(cnt, (mp_limb_t) u); + up[0] = (mp_limb_t) u << cnt; + + MPFR_SET_EXP (uu, GMP_NUMB_BITS - cnt); + inex = mpfr_div (y, uu, x, rnd_mode); + } +#else + { + mpfr_t uu; + + mpfr_init2 (uu, sizeof (unsigned long) * CHAR_BIT); + mpfr_set_ui (uu, u, MPFR_RNDZ); inex = mpfr_div (y, uu, x, rnd_mode); + mpfr_clear (uu); + } +#endif + MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, __gmpfr_flags); MPFR_SAVE_EXPO_FREE (expo); return mpfr_check_range (y, inex, rnd_mode); |