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/* mpfr_add_si -- add a floating-point number with a machine integer
mpfr_sub_si -- sub a floating-point number with a machine integer
mpfr_si_sub -- sub a machine number with a floating-point number
mpfr_mul_si -- multiply a floating-point number by a machine integer
mpfr_div_si -- divide a floating-point number by a machine integer
mpfr_si_div -- divide a machine number by a floating-point number
Copyright 2004-2021 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. */
#include "mpfr-impl.h"
int
mpfr_add_si (mpfr_ptr y, mpfr_srcptr x, long int u, mpfr_rnd_t rnd_mode)
{
int res;
MPFR_LOG_FUNC
(("x[%Pu]=%.*Rg u=%ld rnd=%d",
mpfr_get_prec(x), mpfr_log_prec, x, u, rnd_mode),
("y[%Pu]=%.*Rg inexact=%d",
mpfr_get_prec(y), mpfr_log_prec, y, res));
if (u >= 0)
res = mpfr_add_ui (y, x, u, rnd_mode);
else
res = mpfr_sub_ui (y, x, - (unsigned long) u, rnd_mode);
return res;
}
int
mpfr_sub_si (mpfr_ptr y, mpfr_srcptr x, long int u, mpfr_rnd_t rnd_mode)
{
int res;
MPFR_LOG_FUNC
(("x[%Pu]=%.*Rg u=%ld rnd=%d",
mpfr_get_prec(x), mpfr_log_prec, x, u, rnd_mode),
("y[%Pu]=%.*Rg inexact=%d",
mpfr_get_prec(y), mpfr_log_prec, y, res));
if (u >= 0)
res = mpfr_sub_ui (y, x, u, rnd_mode);
else
res = mpfr_add_ui (y, x, - (unsigned long) u, rnd_mode);
return res;
}
int
mpfr_si_sub (mpfr_ptr y, long int u, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
{
int res;
MPFR_LOG_FUNC
(("x[%Pu]=%.*Rg u=%ld rnd=%d",
mpfr_get_prec(x), mpfr_log_prec, x, u, rnd_mode),
("y[%Pu]=%.*Rg inexact=%d",
mpfr_get_prec(y), mpfr_log_prec, y, res));
if (u >= 0)
res = mpfr_ui_sub (y, u, x, rnd_mode);
else
{
res = - mpfr_add_ui (y, x, - (unsigned long) u,
MPFR_INVERT_RND (rnd_mode));
MPFR_CHANGE_SIGN (y);
}
return res;
}
#undef mpfr_mul_si
int
mpfr_mul_si (mpfr_ptr y, mpfr_srcptr x, long int u, mpfr_rnd_t rnd_mode)
{
int res;
MPFR_LOG_FUNC
(("x[%Pu]=%.*Rg u=%ld rnd=%d",
mpfr_get_prec(x), mpfr_log_prec, x, u, rnd_mode),
("y[%Pu]=%.*Rg inexact=%d",
mpfr_get_prec(y), mpfr_log_prec, y, res));
if (u >= 0)
res = mpfr_mul_ui (y, x, u, rnd_mode);
else
{
res = - mpfr_mul_ui (y, x, - (unsigned long) u,
MPFR_INVERT_RND (rnd_mode));
MPFR_CHANGE_SIGN (y);
}
return res;
}
#undef mpfr_div_si
int
mpfr_div_si (mpfr_ptr y, mpfr_srcptr x, long int u, mpfr_rnd_t rnd_mode)
{
int res;
MPFR_LOG_FUNC
(("x[%Pu]=%.*Rg u=%ld rnd=%d",
mpfr_get_prec(x), mpfr_log_prec, x, u, rnd_mode),
("y[%Pu]=%.*Rg inexact=%d",
mpfr_get_prec(y), mpfr_log_prec, y, res));
if (u >= 0)
res = mpfr_div_ui (y, x, u, rnd_mode);
else
{
res = - mpfr_div_ui (y, x, - (unsigned long) u,
MPFR_INVERT_RND (rnd_mode));
MPFR_CHANGE_SIGN (y);
}
return res;
}
int
mpfr_si_div (mpfr_ptr y, long int u, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
{
int res;
MPFR_LOG_FUNC
(("x[%Pu]=%.*Rg u=%ld rnd=%d",
mpfr_get_prec(x), mpfr_log_prec, x, u, rnd_mode),
("y[%Pu]=%.*Rg inexact=%d",
mpfr_get_prec(y), mpfr_log_prec, y, res));
if (u >= 0)
res = mpfr_ui_div (y, u, x, rnd_mode);
else
{
res = - mpfr_ui_div (y, - (unsigned long) u, x,
MPFR_INVERT_RND(rnd_mode));
MPFR_CHANGE_SIGN (y);
}
return res;
}
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