1 /* sdiv -- Divide a MINT by a short integer. Produce a MINT quotient
4 Copyright (C) 1991 Free Software Foundation, Inc.
6 This file is part of the GNU MP Library.
8 The GNU MP Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 The GNU MP Library is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with the GNU MP Library; see the file COPYING. If not, write to
20 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
29 sdiv (const MINT *dividend, signed short int divisor_short, MINT *quot, short *rem_ptr)
31 sdiv (dividend, divisor_short, quot, rem_ptr)
33 short int divisor_short;
38 mp_size sign_dividend;
39 signed long int sign_divisor;
40 mp_size dividend_size, quot_size;
41 mp_ptr dividend_ptr, quot_ptr;
43 mp_limb remainder_limb;
45 sign_dividend = dividend->size;
46 dividend_size = ABS (dividend->size);
48 if (dividend_size == 0)
55 sign_divisor = divisor_short;
56 divisor_limb = ABS (divisor_short);
58 /* No need for temporary allocation and copying even if QUOT == DIVIDEND
59 as the divisor is just one limb, and thus no intermediate remainders
62 if (quot->alloc < dividend_size)
63 _mpz_realloc (quot, dividend_size);
66 dividend_ptr = dividend->d;
68 remainder_limb = mpn_divmod_1 (quot_ptr,
69 dividend_ptr, dividend_size, divisor_limb);
71 *rem_ptr = sign_dividend >= 0 ? remainder_limb : -remainder_limb;
72 /* The quotient is DIVIDEND_SIZE limbs, but the most significant
73 might be zero. Set QUOT_SIZE properly. */
74 quot_size = dividend_size - (quot_ptr[dividend_size - 1] == 0);
75 quot->size = (sign_divisor ^ sign_dividend) >= 0 ? quot_size : -quot_size;