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b58ddff026
* merged mpfr 3.0.0 and gmp 5.0.1 in buildtools trunk git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@37378 a95241bf-73f2-0310-859d-f6bbb57e9c96
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/* mpfr_add_si -- add a floating-point number with a machine integer
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mpfr_sub_si -- sub a floating-point number with a machine integer
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mpfr_si_sub -- sub a machine number with a floating-point number
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Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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Contributed by the Arenaire and Cacao 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. If not, see
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http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
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#include "mpfr-impl.h"
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int
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mpfr_add_si (mpfr_ptr y, mpfr_srcptr x, long int u, mpfr_rnd_t rnd_mode)
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{
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if (u >= 0)
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return mpfr_add_ui (y, x, u, rnd_mode);
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else
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return mpfr_sub_ui (y, x, -u, rnd_mode);
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}
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int
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mpfr_sub_si (mpfr_ptr y, mpfr_srcptr x, long int u, mpfr_rnd_t rnd_mode)
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{
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if (u >= 0)
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return mpfr_sub_ui (y, x, u, rnd_mode);
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else
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return mpfr_add_ui (y, x, -u, rnd_mode);
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}
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int
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mpfr_si_sub (mpfr_ptr y, long int u, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
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{
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if (u >= 0)
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return mpfr_ui_sub (y, u, x, rnd_mode);
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else
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{
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int res = -mpfr_add_ui (y, x, -u, MPFR_INVERT_RND (rnd_mode));
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MPFR_CHANGE_SIGN (y);
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return res;
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}
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}
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