vasilito
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.
61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/* mpfr_div_2si -- divide a floating-point number by a power of two
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Copyright 1999, 2001-2025 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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MPFR_HOT_FUNCTION_ATTR int
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mpfr_div_2si (mpfr_ptr y, mpfr_srcptr x, long int n, mpfr_rnd_t rnd_mode)
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{
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int inexact;
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MPFR_LOG_FUNC
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(("x[%Pd]=%.*Rg n=%ld rnd=%d",
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mpfr_get_prec(x), mpfr_log_prec, x, n, rnd_mode),
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("y[%Pd]=%.*Rg inexact=%d",
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mpfr_get_prec(y), mpfr_log_prec, y, inexact));
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if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (x)))
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return mpfr_set (y, x, rnd_mode);
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else
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{
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mpfr_exp_t exp = MPFR_GET_EXP (x);
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MPFR_SETRAW (inexact, y, x, exp, rnd_mode);
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if (MPFR_UNLIKELY( n > 0 && (__gmpfr_emin > MPFR_EMAX_MAX - n ||
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exp < __gmpfr_emin + n)) )
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{
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if (rnd_mode == MPFR_RNDN &&
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(__gmpfr_emin > MPFR_EMAX_MAX - (n - 1) ||
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exp < __gmpfr_emin + (n - 1) ||
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((MPFR_IS_NEG (y) ? inexact <= 0 : inexact >= 0) &&
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mpfr_powerof2_raw (y))))
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rnd_mode = MPFR_RNDZ;
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return mpfr_underflow (y, rnd_mode, MPFR_SIGN(y));
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}
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else if (MPFR_UNLIKELY(n <= 0 && (__gmpfr_emax < MPFR_EMIN_MIN - n ||
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exp > __gmpfr_emax + n)) )
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return mpfr_overflow (y, rnd_mode, MPFR_SIGN(y));
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MPFR_SET_EXP (y, exp - n);
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}
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MPFR_RET (inexact);
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}
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