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ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/* mpfr_frexp -- convert to integral and fractional parts
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Copyright 2011-2025 Free Software Foundation, Inc.
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Contributed by the Pascaline and Caramba projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER.
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If not, see <https://www.gnu.org/licenses/>. */
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#include "mpfr-impl.h"
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int
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mpfr_frexp (mpfr_exp_t *exp, mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd)
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{
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int inex;
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mpfr_flags_t saved_flags = __gmpfr_flags;
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MPFR_BLOCK_DECL (flags);
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MPFR_LOG_FUNC
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(("x[%Pd]=%.*Rg rnd=%d", mpfr_get_prec (x), mpfr_log_prec, x, rnd),
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("y[%Pd]=%.*Rg exp=%" MPFR_EXP_FSPEC "d inex=%d", mpfr_get_prec (y),
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mpfr_log_prec, y, (mpfr_eexp_t) *exp, inex));
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if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(x)))
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{
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if (MPFR_IS_NAN(x))
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{
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MPFR_SET_NAN(y);
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MPFR_RET_NAN; /* exp is unspecified */
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}
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else if (MPFR_IS_INF(x))
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{
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MPFR_SET_INF(y);
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MPFR_SET_SAME_SIGN(y,x);
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MPFR_RET(0); /* exp is unspecified */
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}
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else
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{
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MPFR_SET_ZERO(y);
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MPFR_SET_SAME_SIGN(y,x);
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*exp = 0;
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MPFR_RET(0);
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}
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}
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MPFR_BLOCK (flags, inex = mpfr_set (y, x, rnd));
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__gmpfr_flags = saved_flags;
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/* Possible overflow due to the rounding, no possible underflow. */
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if (MPFR_UNLIKELY (MPFR_OVERFLOW (flags)))
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{
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int inex2;
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/* An overflow here means that the exponent of y would be larger than
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the one of x, thus x would be rounded to the next power of 2, and
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the returned y should be 1/2 in absolute value, rounded (i.e. with
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possible underflow or overflow). This also implies that x and y are
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different objects, so that the exponent of x has not been lost. */
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MPFR_LOG_MSG (("Internal overflow\n", 0));
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MPFR_ASSERTD (x != y);
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*exp = MPFR_GET_EXP (x) + 1;
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inex2 = mpfr_set_si_2exp (y, MPFR_INT_SIGN (x), -1, rnd);
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MPFR_LOG_MSG (("inex=%d inex2=%d\n", inex, inex2));
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if (inex2 != 0)
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inex = inex2;
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MPFR_RET (inex);
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}
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*exp = MPFR_GET_EXP (y);
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/* Do not use MPFR_SET_EXP because the range has not been checked yet. */
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MPFR_EXP (y) = 0;
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return mpfr_check_range (y, inex, rnd);
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}
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