71 lines
3.0 KiB
C
71 lines
3.0 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2010 Fredrik Johansson
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "ulong_extras.h"
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#include "fmpz.h"
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#if FLINT64
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#define NUM_SMALL_FIB 94
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#else
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#define NUM_SMALL_FIB 48
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#endif
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static const mp_limb_t small_fib[NUM_SMALL_FIB] =
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{
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0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987,
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1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393,
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196418, 317811, 514229, 832040, 1346269, 2178309, 3524578, 5702887,
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9227465, 14930352, 24157817, 39088169, 63245986, 102334155,
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165580141, 267914296, 433494437, 701408733, 1134903170, 1836311903,
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UWORD(2971215073),
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#if FLINT64
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UWORD(4807526976), UWORD(7778742049), UWORD(12586269025), UWORD(20365011074), UWORD(32951280099),
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UWORD(53316291173), UWORD(86267571272), UWORD(139583862445), UWORD(225851433717),
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UWORD(365435296162), UWORD(591286729879), UWORD(956722026041), 1548008755920,
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UWORD(2504730781961), UWORD(4052739537881), UWORD(6557470319842), 10610209857723,
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UWORD(17167680177565), UWORD(27777890035288), UWORD(44945570212853), 72723460248141,
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UWORD(117669030460994), UWORD(190392490709135), UWORD(308061521170129), 498454011879264,
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UWORD(806515533049393), UWORD(1304969544928657), UWORD(2111485077978050),
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UWORD(3416454622906707), UWORD(5527939700884757), UWORD(8944394323791464),
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UWORD(14472334024676221), UWORD(23416728348467685), UWORD(37889062373143906),
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UWORD(61305790721611591), UWORD(99194853094755497), UWORD(160500643816367088),
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UWORD(259695496911122585), UWORD(420196140727489673), UWORD(679891637638612258),
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UWORD(1100087778366101931), UWORD(1779979416004714189), UWORD(2880067194370816120),
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UWORD(4660046610375530309), UWORD(7540113804746346429), UWORD(12200160415121876738)
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#endif
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};
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void fmpz_fib_ui(fmpz_t f, ulong n)
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{
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if (n < NUM_SMALL_FIB)
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fmpz_set_ui(f, small_fib[n]);
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else
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flint_mpz_fib_ui(_fmpz_promote(f), n);
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}
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