1 /* mpz_fdiv_ui -- Division rounding the quotient towards -infinity.
2 The remainder gets the same sign as the denominator.
4 Copyright 1994, 1995, 1996, 2001, 2002, 2004, 2005 Free Software Foundation,
7 This file is part of the GNU MP Library.
9 The GNU MP Library is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or (at your
12 option) any later version.
14 The GNU MP Library is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
26 mpz_fdiv_ui (mpz_srcptr dividend
, unsigned long int divisor
)
43 #if BITS_PER_ULONG > GMP_NUMB_BITS /* avoid warnings about shift amount */
44 if (divisor
> GMP_NUMB_MAX
)
46 mp_limb_t dp
[2], rp
[2];
51 if (nn
== 1) /* tdiv_qr requirements; tested above for 0 */
59 dp
[0] = divisor
& GMP_NUMB_MASK
;
60 dp
[1] = divisor
>> GMP_NUMB_BITS
;
61 qp
= TMP_ALLOC_LIMBS (nn
- 2 + 1);
62 mpn_tdiv_qr (qp
, rp
, (mp_size_t
) 0, np
, nn
, dp
, (mp_size_t
) 2);
64 rl
= rp
[0] + (rp
[1] << GMP_NUMB_BITS
);
67 if (rl
!= 0 && ns
< 0)
70 rp
[0] = rl
& GMP_NUMB_MASK
;
71 rp
[1] = rl
>> GMP_NUMB_BITS
;
74 rn
= 1 + (rl
> GMP_NUMB_MAX
); rn
-= (rp
[rn
- 1] == 0);
79 rl
= mpn_mod_1 (np
, nn
, (mp_limb_t
) divisor
);