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/* Implementations of operations between mpfr and mpz/mpq data
Copyright 2001, 2003, 2004 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The 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 2.1 of the License, or (at your
option) any later version.
The 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 MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stddef.h>
#include "mpfr-impl.h"
int
mpfr_mul_z (mpfr_ptr y, mpfr_srcptr x, mpz_srcptr z,mp_rnd_t rnd_mode)
{
mpfr_t t;
int res;
mpfr_init2(t, mpz_sizeinbase(z, 2) );
res = mpfr_set_z(t, z, rnd_mode);
MPFR_ASSERTD(res == 0);
res = mpfr_mul(y, x, t, rnd_mode);
mpfr_clear(t);
return(res);
}
int
mpfr_div_z (mpfr_ptr y, mpfr_srcptr x, mpz_srcptr z, mp_rnd_t rnd_mode)
{
mpfr_t t;
int res;
mpfr_init2(t, mpz_sizeinbase(z, 2) );
res = mpfr_set_z(t, z, rnd_mode);
MPFR_ASSERTD(res == 0);
res = mpfr_div(y, x, t, rnd_mode);
mpfr_clear(t);
return(res);
}
int
mpfr_add_z (mpfr_ptr y, mpfr_srcptr x, mpz_srcptr z, mp_rnd_t rnd_mode)
{
mpfr_t t;
int res;
mpfr_init2(t, mpz_sizeinbase(z, 2) );
res = mpfr_set_z(t, z, rnd_mode);
MPFR_ASSERTD(res == 0);
res = mpfr_add(y, x, t, rnd_mode);
mpfr_clear(t);
return(res);
}
int
mpfr_sub_z (mpfr_ptr y, mpfr_srcptr x, mpz_srcptr z,mp_rnd_t rnd_mode)
{
mpfr_t t;
int res;
mpfr_init2(t, mpz_sizeinbase(z, 2) );
res = mpfr_set_z(t, z, rnd_mode);
MPFR_ASSERTD(res == 0);
res=mpfr_sub(y, x, t, rnd_mode);
mpfr_clear(t);
return(res);
}
int
mpfr_mul_q (mpfr_ptr y, mpfr_srcptr x, mpq_srcptr z,mp_rnd_t rnd_mode)
{
mpfr_t tmp;
int res;
mpfr_init2 (tmp, MPFR_PREC(x) + mpz_sizeinbase(mpq_numref(z), 2) );
res = mpfr_mul_z (tmp, x, mpq_numref(z), GMP_RNDN );
MPFR_ASSERTD( res == 0 );
res = mpfr_div_z (y, tmp, mpq_denref(z), rnd_mode);
mpfr_clear(tmp);
return(res);
}
int
mpfr_div_q (mpfr_ptr y, mpfr_srcptr x, mpq_srcptr z, mp_rnd_t rnd_mode)
{
mpfr_t tmp;
int res;
mpfr_init2 (tmp, MPFR_PREC(x) + mpz_sizeinbase(mpq_denref(z), 2) );
res = mpfr_mul_z (tmp, x, mpq_denref(z), GMP_RNDN );
MPFR_ASSERTD( res == 0 );
res = mpfr_div_z (y, tmp, mpq_numref(z), rnd_mode);
mpfr_clear(tmp);
return(res);
}
int
mpfr_add_q (mpfr_ptr y, mpfr_srcptr x, mpq_srcptr z, mp_rnd_t rnd_mode)
{
mpfr_t t,q;
mp_prec_t p = MPFR_PREC(y)+10;
int res;
mpfr_inits2(p, t, q, NULL);
do {
mpfr_set_q(q, z, GMP_RNDN); /* Error <= 1/2ulp */
mpfr_add(t, x, q, GMP_RNDN); /* Error <= 1 ulp */
res = mpfr_can_round(t, p-1, GMP_RNDN, GMP_RNDZ,
MPFR_PREC(y) + (rnd_mode == GMP_RNDN) );
if (!res)
{
p += BITS_PER_MP_LIMB;
mpfr_set_prec(t, p);
mpfr_set_prec(q, p);
}
} while (!res);
res = mpfr_set(y, t, rnd_mode);
mpfr_clears(t, q, NULL);
return res;
}
int
mpfr_sub_q (mpfr_ptr y, mpfr_srcptr x, mpq_srcptr z,mp_rnd_t rnd_mode)
{
mpfr_t t,q;
mp_prec_t p = MPFR_PREC(y)+10;
int res;
mpfr_inits2(p, t, q, NULL);
do {
mpfr_set_q(q, z, GMP_RNDN); /* Error <= 1/2ulp */
mpfr_sub(t, x, q, GMP_RNDN); /* Error <= 1 ulp */
res = mpfr_can_round(t, p-1, GMP_RNDN, GMP_RNDZ,
MPFR_PREC(y) + (rnd_mode == GMP_RNDN) );
if (!res)
{
p += BITS_PER_MP_LIMB;
mpfr_set_prec(t, p);
mpfr_set_prec(q, p);
}
} while (!res);
res = mpfr_set(y, t, rnd_mode);
mpfr_clears(t, q, NULL);
return res;
}
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