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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/round_raw_generic.c')
-rw-r--r--Build/source/libs/mpfr/mpfr-src/src/round_raw_generic.c278
1 files changed, 0 insertions, 278 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/round_raw_generic.c b/Build/source/libs/mpfr/mpfr-src/src/round_raw_generic.c
deleted file mode 100644
index ee83d65b7fb..00000000000
--- a/Build/source/libs/mpfr/mpfr-src/src/round_raw_generic.c
+++ /dev/null
@@ -1,278 +0,0 @@
-/* mpfr_round_raw_generic -- Generic rounding function
-
-Copyright 1999-2020 Free Software Foundation, Inc.
-Contributed by the AriC and Caramba projects, INRIA.
-
-This file is part of the GNU MPFR Library.
-
-The GNU MPFR Library is free software; you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation; either version 3 of the License, or (at your
-option) any later version.
-
-The GNU MPFR Library is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
-License for more details.
-
-You should have received a copy of the GNU Lesser General Public License
-along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
-https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
-51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-#ifndef flag
-# error "ERROR: flag must be defined (0 / 1)"
-#endif
-#ifndef use_inexp
-# error "ERROR: use_enexp must be defined (0 / 1)"
-#endif
-#ifndef mpfr_round_raw_generic
-# error "ERROR: mpfr_round_raw_generic must be defined"
-#endif
-
-/*
- * If flag = 0, puts in y the value of xp (with precision xprec and
- * sign 1 if negative=0, -1 otherwise) rounded to precision yprec and
- * direction rnd_mode. Supposes x is not zero nor NaN nor +/- Infinity
- * (i.e. *xp != 0). In that case, the return value is a possible carry
- * (0 or 1) that may happen during the rounding, in which case the result
- * is a power of two.
- *
- * If inexp != NULL, put in *inexp the inexact flag of the rounding (0, 1, -1).
- * In case of even rounding when rnd = MPFR_RNDN, put MPFR_EVEN_INEX (2) or
- * -MPFR_EVEN_INEX (-2) in *inexp.
- *
- * If flag = 1, just returns whether one should add 1 or not for rounding.
- *
- * Note: yprec may be < MPFR_PREC_MIN; in particular, it may be equal
- * to 1. In this case, the even rounding is done away from 0, which is
- * a natural generalization. Indeed, a number with 1-bit precision can
- * be seen as a subnormal number with more precision.
- *
- * MPFR_RNDNA is now supported, but needs to be tested [TODO] and is
- * still not part of the API. In particular, the MPFR_RNDNA value (-1)
- * may change in the future without notice.
- */
-
-#if !(flag == 0 || flag == 1)
-#error "flag must be 0 or 1"
-#endif
-
-int
-mpfr_round_raw_generic(
-#if flag == 0
- mp_limb_t *yp,
-#endif
- const mp_limb_t *xp, mpfr_prec_t xprec,
- int neg, mpfr_prec_t yprec, mpfr_rnd_t rnd_mode
-#if use_inexp != 0
- , int *inexp
-#endif
- )
-{
- mp_size_t xsize, nw;
- mp_limb_t himask, lomask, sb;
- int rw, new_use_inexp;
-#if flag == 0
- int carry;
-#endif
-
-#if use_inexp != 0
- MPFR_ASSERTD (inexp != ((int*) 0));
-#endif
- MPFR_ASSERTD (neg == 0 || neg == 1);
-#if flag == 1
- /* rnd_mode = RNDF is only possible for flag = 0. */
- MPFR_ASSERTD (rnd_mode != MPFR_RNDF);
-#endif
-
- if (rnd_mode == MPFR_RNDF)
- {
-#if use_inexp != 0
- *inexp = 0; /* make sure it has a valid value */
-#endif
- rnd_mode = MPFR_RNDZ; /* faster */
- new_use_inexp = 0;
- }
- else
- {
- if (flag && !use_inexp &&
- (xprec <= yprec || MPFR_IS_LIKE_RNDZ (rnd_mode, neg)))
- return 0;
- new_use_inexp = use_inexp;
- }
-
- xsize = MPFR_PREC2LIMBS (xprec);
- nw = yprec / GMP_NUMB_BITS;
- rw = yprec & (GMP_NUMB_BITS - 1);
-
- if (MPFR_UNLIKELY(xprec <= yprec))
- { /* No rounding is necessary. */
- /* if yp=xp, maybe an overlap: mpn_copyd is OK when src <= dst */
- if (MPFR_LIKELY(rw))
- nw++;
- MPFR_ASSERTD(nw >= 1);
- MPFR_ASSERTD(nw >= xsize);
-#if use_inexp != 0
- *inexp = 0;
-#endif
-#if flag == 0
- mpn_copyd (yp + (nw - xsize), xp, xsize);
- MPN_ZERO(yp, nw - xsize);
-#endif
- return 0;
- }
-
- if (new_use_inexp || !MPFR_IS_LIKE_RNDZ(rnd_mode, neg))
- {
- mp_size_t k = xsize - nw - 1;
-
- if (MPFR_LIKELY(rw))
- {
- nw++;
- lomask = MPFR_LIMB_MASK (GMP_NUMB_BITS - rw);
- himask = ~lomask;
- }
- else
- {
- lomask = MPFR_LIMB_MAX;
- himask = MPFR_LIMB_MAX;
- }
- MPFR_ASSERTD(k >= 0);
- sb = xp[k] & lomask; /* First non-significant bits */
- /* Rounding to nearest? */
- if (rnd_mode == MPFR_RNDN || rnd_mode == MPFR_RNDNA)
- {
- /* Rounding to nearest */
- mp_limb_t rbmask = MPFR_LIMB_ONE << (GMP_NUMB_BITS - 1 - rw);
-
- if ((sb & rbmask) == 0) /* rounding bit = 0 ? */
- goto rnd_RNDZ; /* yes, behave like rounding toward zero */
- /* Rounding to nearest with rounding bit = 1 */
- if (MPFR_UNLIKELY (rnd_mode == MPFR_RNDNA))
- goto away_addone_ulp; /* like rounding away from zero */
- sb &= ~rbmask; /* first bits after the rounding bit */
- while (MPFR_UNLIKELY(sb == 0) && k > 0)
- sb = xp[--k];
- if (MPFR_UNLIKELY(sb == 0)) /* Even rounding. */
- {
- /* sb == 0 && rnd_mode == MPFR_RNDN */
- sb = xp[xsize - nw] & (himask ^ (himask << 1));
- if (sb == 0)
- {
-#if use_inexp != 0
- *inexp = 2 * MPFR_EVEN_INEX * neg - MPFR_EVEN_INEX;
-#endif
- /* ((neg!=0)^(sb!=0)) ? MPFR_EVEN_INEX : -MPFR_EVEN_INEX */
- /* since neg = 0 or 1 and sb = 0 */
-#if flag == 0
- mpn_copyi (yp, xp + xsize - nw, nw);
- yp[0] &= himask;
-#endif
- return 0; /* sb != 0 && rnd_mode != MPFR_RNDZ */
- }
- else
- {
- away_addone_ulp:
- /* sb != 0 && rnd_mode == MPFR_RNDN */
-#if use_inexp != 0
- *inexp = MPFR_EVEN_INEX - 2 * MPFR_EVEN_INEX * neg;
-#endif
- /* ((neg!=0)^(sb!=0)) ? MPFR_EVEN_INEX : -MPFR_EVEN_INEX */
- /* since neg = 0 or 1 and sb != 0 */
- goto rnd_RNDN_add_one_ulp;
- }
- }
- else /* sb != 0 && rnd_mode == MPFR_RNDN */
- {
-#if use_inexp != 0
- *inexp = 1 - 2 * neg; /* neg == 0 ? 1 : -1 */
-#endif
- rnd_RNDN_add_one_ulp:
-#if flag == 1
- return 1; /* sb != 0 && rnd_mode != MPFR_RNDZ */
-#else
- carry = mpn_add_1 (yp, xp + xsize - nw, nw,
- rw ?
- MPFR_LIMB_ONE << (GMP_NUMB_BITS - rw)
- : MPFR_LIMB_ONE);
- yp[0] &= himask;
- return carry;
-#endif
- }
- }
- /* Rounding toward zero? */
- else if (MPFR_IS_LIKE_RNDZ(rnd_mode, neg))
- {
- /* rnd_mode == MPFR_RNDZ */
- rnd_RNDZ:
- while (MPFR_UNLIKELY (sb == 0) && k > 0)
- sb = xp[--k];
-#if use_inexp != 0
- /* rnd_mode == MPFR_RNDZ and neg = 0 or 1 */
- /* ((neg != 0) ^ (rnd_mode != MPFR_RNDZ)) ? 1 : -1 */
- *inexp = MPFR_UNLIKELY (sb == 0) ? 0 : 2 * neg - 1;
-#endif
-#if flag == 0
- mpn_copyi (yp, xp + xsize - nw, nw);
- yp[0] &= himask;
-#endif
- return 0; /* sb != 0 && rnd_mode != MPFR_RNDZ */
- }
- else
- {
- /* Rounding away from zero */
- while (MPFR_UNLIKELY (sb == 0) && k > 0)
- sb = xp[--k];
- if (MPFR_UNLIKELY (sb == 0))
- {
- /* sb = 0 && rnd_mode != MPFR_RNDZ */
-#if use_inexp != 0
- /* ((neg != 0) ^ (rnd_mode != MPFR_RNDZ)) ? 1 : -1 */
- *inexp = 0;
-#endif
-#if flag == 0
- mpn_copyi (yp, xp + xsize - nw, nw);
- yp[0] &= himask;
-#endif
- return 0;
- }
- else
- {
- /* sb != 0 && rnd_mode != MPFR_RNDZ */
-#if use_inexp != 0
- *inexp = 1 - 2 * neg; /* neg == 0 ? 1 : -1 */
-#endif
-#if flag == 1
- return 1;
-#else
- carry = mpn_add_1(yp, xp + xsize - nw, nw,
- rw ? MPFR_LIMB_ONE << (GMP_NUMB_BITS - rw)
- : MPFR_LIMB_ONE);
- yp[0] &= himask;
- return carry;
-#endif
- }
- }
- }
- else
- {
- /* Rounding toward zero / no inexact flag */
-#if flag == 0
- if (MPFR_LIKELY(rw))
- {
- nw++;
- himask = ~MPFR_LIMB_MASK (GMP_NUMB_BITS - rw);
- }
- else
- himask = MPFR_LIMB_MAX;
- mpn_copyi (yp, xp + xsize - nw, nw);
- yp[0] &= himask;
-#endif
- return 0;
- }
-}
-
-#undef flag
-#undef use_inexp
-#undef mpfr_round_raw_generic